US20120320638A1 - Resonant circuit and resonant dc/dc converter - Google Patents
Resonant circuit and resonant dc/dc converterDownload PDFInfo
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- US20120320638A1 US20120320638A1US13/516,375US201013516375AUS2012320638A1US 20120320638 A1US20120320638 A1US 20120320638A1US 201013516375 AUS201013516375 AUS 201013516375AUS 2012320638 A1US2012320638 A1US 2012320638A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
- H02M3/3376—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- a solar cell panelgenerates DC power.
- a power converter systemTo supply the DC power to an AC load, either directly or via an AC power distribution network, a power converter system must be connected between the solar cell panel and the AC load for converting the DC power to AC power.
- Such power converter systemsnormally comprise a DC/DC converter and a DC/AC converter, the DC/AC converter normally being referred to as an inverter.
- the systemcomprises a control system for controlling the converters, and other components such as filters, fuses, cooling systems etc.
- the series resonant LLC DC/DC converterhas become a popular alternative to PWM type converters in many applications.
- One advantage with the resonant converteris that it can be designed for high efficiency for all load and input/output voltage conditions since it can maintain zero-voltage switching for all operating conditions.
- the object of the present inventionis to provide a resonant circuit with high efficiency and low cost, and which has high efficiency for a wide input voltage range. Moreover, the object is to reduce the number of components, and thereby reducing the complexity and costs involved. In addition, it is an object of the invention to reduce the ripple currents generated by the converter.
- the object of the inventionis also to provide a resonant DC/DC converter with such a resonant circuit.
- the present inventionrelates to a resonant circuit comprising three resonant circuit input nodes and three resonant circuit output nodes; a transformer device comprising three primary windings and three secondary windings magnetically connected to each other, where the three secondary windings are connected to the three resonant circuit output nodes; first, second and third resonant tank devices each connected between the respective three resonant circuit input nodes and the respective primary windings; first, second and third transformer switching devices for reconfiguring the three secondary windings between a delta-configuration and a star-configuration.
- each resonant tank devicecomprises a resonant inductor and a resonant capacitor.
- the three primary windings together with the three resonant tank devicesare configured in a delta-configuration.
- first, second and third transformer switching devicesare provided for reconfiguring the three primary windings between a delta-configuration and a star-configuration.
- the first transformer switching devicecomprises a common terminal connected to second terminal of the second transformer switching device, a first terminal connected to the first resonant output node and a second terminal connected to the common terminal of the third transformer switching device;
- the second transformer switching devicecomprises a common terminal connected to second terminal of the third transformer switching device, a first terminal connected to the second resonant circuit output node and a second terminal connected to the common terminal of the first transformer switching device;
- the third transformer switching devicecomprises the common terminal connected the second terminal of the first transformer switching device, a first terminal connected to the third resonant circuit output node and a second terminal connected to the common terminal of the second transformer switching device; where the first secondary winding is connected between the first and second terminals of the first transformer switching device, the second secondary winding is connected between the first and second terminals of the second transformer switching device and the third secondary winding is connected between the first and second terminals of the third transformer switching device, where the transformer device is connected in a delta-configuration when the first terminals of the respective transformer switching devices are connected
- the first resonant inductor, the first resonant capacitor and the first primary windingare connected in series between the first resonant circuit input node and the third resonant circuit input node; the second resonant inductor, the second resonant capacitor and the second primary winding are connected in series between the second resonant circuit input node and the first resonant circuit input node; and the third resonant inductor, the third resonant capacitor and the third primary winding are connected in series between the third resonant circuit input node and the second resonant circuit input node.
- a magnetic inductoris connected in parallel with each of the primary windings.
- the first resonant inductor, the first resonant capacitor and the first primary windingare connected in series between the first resonant circuit input node and a primary common node; the second resonant inductor, the second resonant capacitor and the second primary winding are connected in series between the second resonant circuit input node and a primary common node; and the third resonant inductor, the third resonant capacitor and the third primary winding are connected in series between the third resonant circuit input node and a primary common node.
- the inventionalso relates to a resonant DC-DC converter comprising first and second input terminals and first and second output terminals; a switching device connected between the first and second input terminals and three resonant circuit input nodes of a resonant circuit; a rectifier device connected between three resonant circuit output nodes and the first and second output terminals; where the resonant circuit comprises a transformer device comprising three primary windings and three secondary windings magnetically connected to each other, where the three secondary windings are connected to the three resonant circuit output nodes; where the resonant circuit comprises first, second and third resonant tank devices each connected between the respective three resonant circuit input nodes and the respective primary windings; and where the resonant circuit comprises first, second and third transformer switching devices for reconfiguring the three secondary windings between a delta-configuration and a star-configuration.
- the three primary windingsare configured in a delta-configuration.
- first, second and third transformer switching devicesfor reconfiguring the three primary windings between a delta-configuration and a star-configuration.
- the switching devicecomprises six switching devices, where each switching device is connected between one of the first or second input terminals and one of the respective switch output nodes.
- the rectifier deviceis a diode rectifier or a synchronous rectifier.
- FIG. 1illustrates a power converter system for converting DC power from a solar cell panel to AC power supplied to an AC power distribution network or an AC load;
- FIG. 2is a schematic block diagram of the DC/DC converter of FIG. 1 ;
- FIG. 3is a first embodiment of a resonant DC/DC converter
- FIG. 4is a second embodiment of a resonant DC/DC converter
- FIG. 5is a third embodiment of a resonant DC/DC converter
- FIG. 6is a fourth embodiment of a resonant DC/DC converter
- FIG. 7is a fifth embodiment of a resonant DC/DC converter
- FIG. 8is a sixth embodiment of a resonant DC/DC converter
- FIG. 9is a seventh embodiment of a resonant DC/DC converter
- FIG. 10is an eight embodiment of a resonant DC/DC converter
- FIG. 11is a ninth embodiment of a resonant DC/DC converter
- FIG. 12is an illustration of a prior art converter typically used in such applications, comprising two series resonant LLC converters in parallel phase shifted 90 degrees;
- FIG. 13 ashows the results of a simulation of the circuit in FIG. 12 ;
- FIG. 13 bshows the results of a simulation of the circuit in FIG. 3 .
- a power converter system 1is connected between a DC power source 2 and an AC load or AC distribution network 3 .
- the DC power sourceis here a solar cell panel or a module comprising several solar cell panels, but can be any other type of suitable energy source.
- the power converter systemconverts the input DC power to an AC output power.
- the power converter systemcomprises a DC/DC converter and an inverter (DC/AC converter), filters etc as mentioned in the description above.
- the systemcomprises a control system for controlling the DC/DC converter, the inverter and other components.
- the system in FIG. 1is in general known for a skilled person.
- FIG. 2illustrates a resonant DC/DC converter comprising a switching device 10 , a resonant circuit 20 and a rectifier 30 connected to each other between first and second input terminals IT 1 , IT 2 and first and second output terminals OT 1 , OT 2 .
- the switching device 10comprises six switches S 1 , S 2 , S 3 , S 4 , S 5 , S 6 , where each switch is connected between one of the first or second input terminals IT 1 , IT 2 and one of the respective input nodes of the resonant circuit, hereinafter referred to as resonant circuit input nodes 11 , 12 , 13 .
- the first switch S 1is connected between the first input terminal IT 1 and the first switch output terminal 11
- a second switch S 2is connected between the first switch output node 11 and the second input terminal IT 2
- a third switch S 3is connected between the first input terminal IT 1 and the second switch output terminal 12
- a fourth switch S 4is connected between the second switch output node 12 and the second input terminal IT 2
- a fifth switch S 5is connected between the first input terminal IT 1 and the third switch output terminal 13
- a sixth switch S 6is connected between the third switch output node 13 and the second input terminal IT 2 .
- the switches S 1 , S 2 , S 3 , S 4 , S 5 , and S 6are MOSFET switches. Alternatively, the switches may be switches with intrinsic diodes or switches connected in parallel with anti-parallel diodes.
- the switching device 10further comprises switch capacitors CS 1 , CS 2 , CS 3 , CS 4 , CS 5 and CS 6 , each connected in parallel with one of the respective switches 51 , S 2 , S 3 , S 4 , S 5 , S 6 .
- the switches S 1 , S 2 , S 3 , S 4 , S 5 , and S 6are controlled by the control system illustrated in FIG. 1 . It should be noted that the switches S 1 -S 6 can be controlled by frequency, PWM, or as a hybrid of both of these.
- the resonant circuit 20comprises three resonant circuit input nodes 11 , 12 , 13 .
- the resonant circuit 20also comprises three resonant circuit output nodes 21 , 22 , 23 .
- the rectifier device 30is connected between the three resonant circuit output nodes 21 , 22 , 23 and the first and second output terminals OT 1 , OT 2 .
- the rectifier device 30 of FIG. 2is a diode rectifier.
- the rectifier device 30 of FIG. 2comprises a first diode D 1 with its anode connected to the first rectifier input node 21 and its cathode connected to the first output terminal OT 1 , a second diode D 2 with its anode connected to the second output terminal OT 2 and its cathode connected to the first rectifier input node 21 , a third diode D 3 with its anode connected to the second rectifier input node 22 and its cathode connected to the first output terminal OT 1 , a fourth diode D 4 with its anode connected to the second output terminal OT 2 and its cathode connected to the second rectifier input node 22 , a fifth diode D 5 with its anode connected to the third rectifier input node 23 and its cathode connected to the first output terminal OT 1 and a sixth diode D 6 with its anode connected to the second output terminal OT 2 and its cathode connected to the third rectifier input node 23 .
- the rectifier device 30may be a synchronous rectifier.
- FIG. 2it is shown that an output capacitor Cout is connected between the first and second output terminals OT 1 , OT 2 .
- the switching device 10 and the rectifier device 30are considered known for a skilled person.
- the control of the switches in the switching device 10is considered known for a skilled person.
- the control of the switchesis based on soft switching or so-called zero voltage switching (ZVS), where the voltage over the switch is equal to or near zero V when the switch is turned on/off.
- ZVSzero voltage switching
- the resonant circuit 20comprises a transformer device TR comprising three primary windings LP 1 , LP 2 , LP 3 and three secondary windings LS 1 , LS 2 , LS 3 magnetically connected to each other, where the three secondary windings LS 1 , LS 2 , LS 3 are connected to the three resonant circuit output nodes 21 , 22 , 23 .
- the resonant circuit 20comprises first, second and third resonant tank devices RT 1 , RT 2 , RT 3 each connected between the respective three resonant circuit input nodes 11 , 12 , 13 and the respective primary windings LP 1 , LP 2 , LP 3 .
- the transformer device TRmay be a three phase transformer. In an alternative embodiment, also three single phased transformers may be used.
- the primary windings LP 1 , LP 2 , LP 3may be configured in a delta-configuration or in a star-configuration. More precisely, the three primary windings LP 1 , LP 2 , LP 3 together with the three resonant tank devices RT 1 , RT 2 , RT 3 may be configured in a delta-configuration or in a star configuration, as will be described in detail below.
- the secondary windings LS 1 , LS 2 , LS 3may be configured in a delta-configuration or in a star-configuration.
- the resonant circuit 20comprises first, second and third transformer switching devices ST 1 , ST 2 , ST 3 for reconfiguring the three secondary windings LS 1 , LS 2 , LS 3 between a delta-configuration and a star-configuration.
- the resonant circuit 20may comprise first, second and third transformer switching devices ST 1 , ST 2 , ST 3 for reconfiguring the three primary windings LP 1 , LP 2 , LP 3 between a delta-configuration and a star-configuration.
- the transformer switching devices ST 1 , ST 2 , ST 3may be controlled by the control system.
- Each resonant tank device RT 1 , RT 2 , RT 3comprises a resonant inductor LR 1 , LR 2 , LR 3 and a resonant capacitor CR 1 , CR 2 , CR 3 .
- the resonant tank device, together with the primary windings LP 1 , LP 2 , LP 3provides resonance for the zero-voltage switching of the switching device 10 .
- the resonant tank devicesmay be partially or fully integrated in the transformer device, utilizing the leakage inductance and other parasitic elements.
- the voltage between the first and second input terminals IT 1 and IT 2is referred to as Uin.
- the voltage between the first and second output terminals OT 1 and OT 2is referred to as Uout.
- the voltage and/or current in each of the three branches of the resonant device 20has the same magnitude, but are displaced in time by 120 electrical degrees. Consequently, the device 20 together with devices 10 and 30 are a three phase resonant DC/DC converter.
- the first, second and third transformer switching devices ST 1 , ST 2 , ST 3 for reconfiguring the three secondary windings LS 1 , LS 2 , LS 3 between a delta-configuration and a star-configurationare not shown in all drawings.
- the secondary windings LS 1 , LS 2 , LS 3are either in a delta-configuration or in a star-configuration in all embodiments below.
- the first resonant tank devicecomprises the first resonant inductor LR 1 and the first resonant capacitor CR 1 connected in series with the first primary winding LP 1 between the first resonant circuit input node 11 and the third resonant circuit input node 13 .
- the second resonant tank devicecomprises the second resonant inductor LR 2 and the second resonant capacitor CR 2 connected in series with the second primary winding LP 2 between the second resonant circuit input node 12 and the first resonant circuit input node 11 .
- the third resonant tank devicecomprises the third resonant inductor LR 3 and the third resonant capacitor CR 3 connected in series with the third primary winding LP 3 between the third resonant circuit input node 13 and the second resonant circuit input node 12 .
- the secondary windings LS 1 , LS 2 , LS 3are connected between the resonant circuit output nodes 21 , 22 , 23 .
- the first secondary winding LS 1is connected between the first and second rectifier input nodes 21 , 22
- the second secondary winding LS 2is connected between the second and third rectifier input nodes 22 , 23
- the third secondary winding LS 3is connected between the third and first rectifier input nodes 23 , 21 .
- the primary side of the transformer device TRis connected in a delta-configuration and the secondary side of the transformer device TR is connected in a delta-configuration.
- the first, second and third transformer switching devices ST 1 , ST 2 , ST 3are configured so that the three secondary windings LS 1 , LS 2 , LS 3 are in a delta-configuration.
- the term “primary side”here denotes the primary windings and the components of the resonant tank.
- the three primary windings LP 1 , LP 2 , LP 3 together with the three resonant tank devices RT 1 , RT 2 , RT 3are configured in a delta-configuration.
- resonant tank devicesmay be partially or fully integrated in the transformer device, as described above.
- FIG. 4It is now referred to FIG. 4 .
- the resonant tank devices and the primary side of the transformer deviceare configured as in the first embodiment above.
- the secondary windingsare here also connected between the resonant circuit output nodes 21 , 22 , 23 .
- a secondary common node 24is shown in the FIG. 4 .
- the first secondary winding LS 1is connected between the first resonant circuit output node 21 and the secondary common node 24 .
- the second secondary winding LS 2is connected between the second resonant circuit output node 22 and the secondary common node 24 .
- the third secondary winding LS 3is connected between the third resonant circuit output node 23 and the secondary common node 24 .
- the primary side of the transformer device TRis connected in a delta-configuration and the secondary side of the transformer device TR is connected in a star-configuration, i.e. the first, second and third transformer switching devices ST 1 , ST 2 , ST 3 are configured so that the three secondary windings LS 1 , LS 2 , LS 3 are in a star-configuration.
- the term “primary side”here denotes the primary windings and the components of the resonant tank.
- the three primary windings LP 1 , LP 2 , LP 3 together with the three resonant tank devices RT 1 , RT 2 , RT 3are configured in a delta-configuration.
- the secondary common node 24may be considered as the common point of the star-configured transformer. Note that the term “secondary” is here used to denote the location on the secondary side of the transformer device.
- the resonant tank devicesmay be partially or fully integrated in the transformer device.
- FIG. 5 a and FIG. 5 bIt is now referred to FIG. 5 a and FIG. 5 b.
- the resonant tank devices and the primary side of the transformer deviceis configured as in the first embodiment above.
- the secondary windingsare here also connected between the resonant circuit output nodes 21 , 22 , 23 .
- the resonant circuit 20comprises first, second and third transformer switching devices ST 1 , ST 2 , ST 3 for reconfiguring the three secondary windings LS 1 , LS 2 , LS 3 between a delta-configuration and a star-configuration.
- the terminology of the first transformer switching device ST 1is shown in FIG. 5 b .
- the switching of the transformer switching devices ST 1 , ST 2 , ST 3may be performed by means of relay devices, or any other switching devices, controlled by the control system.
- the first transformer switching device ST 1comprises a common terminal Tcom connected to a second terminal T 2 of the second transformer switching device ST 2 , a first terminal T 1 connected to the first resonant circuit output node 21 and a second terminal T 2 connected to the common terminal Tcom of the third transformer switching device ST 3 .
- the second transformer switching device ST 2comprises a common terminal Tcom connected to a second terminal T 2 of the third transformer switching device ST 3 , a first terminal T 1 connected to the second resonant circuit output node 22 and a second terminal T 2 connected to the common terminal Tcom of the first transformer switching device ST 1 .
- the third transformer switching device ST 3comprises the common terminal Tcom connected the second terminal T 2 of the first transformer switching device ST 1 , a first terminal T 1 connected to the third resonant circuit output node 23 and a second terminal T 2 connected to the common terminal Tcom of the second transformer switching device ST 2 .
- the first secondary winding LS 1is connected between the first and second terminals T 1 , T 2 of the first transformer switching device ST 1
- the second secondary winding LS 2is connected between the first and second terminals T 1 , T 2 of the second transformer switching device ST 2
- the third secondary winding LS 3is connected between the first and second terminals TI, T 2 of the third transformer switching device ST 3 .
- the transformer device TRis connected in a delta-delta configuration when the first terminals T 1 of the respective transformer switching devices are connected to their common terminal Tcom.
- the transformer device TRis connected in a delta-star configuration when the second terminals T 2 of the respective transformer switching devices are connected to their common terminals Tcom.
- the transformer switching devices ST 1 , ST 2 , ST 3are be controlled by the control system.
- the input voltage Uinmay be measured and given as an input to the control system. If the measured input voltage Uin is below a certain threshold value, the transformer switching devices ST 1 , ST 2 , ST 3 is switched so that the secondary side of the transformer device is connected in a star configuration. If the measured input voltage Uin is above a certain threshold value, the transformer switching devices ST 1 , ST 2 , ST 3 is switched so that the secondary side of the transformer device is connected in a delta-configuration. Consequently, the output voltage Uout decreases.
- transformer switching devices ST 1 , ST 2 , ST 3may be provided on the primary side in addition to the transformer switching devices ST 1 , ST 2 , ST 3 on the secondary side.
- the primary side of the transformer devicemay be reconfigured between a delta-configuration and a star-configuration.
- the resonant circuit 20is here similar to the resonant circuit 20 of the second embodiment ( FIG. 4 ).
- the rectifier device 30is not a diode rectifier. Instead, the rectifier device 30 is a synchronous rectifier with six switches S 7 , S 8 , S 9 , S 10 , S 11 , S 12 instead of the six diodes.
- the rectifier devicecomprises six switch capacitors CS 7 , CS 8 , CS 9 , CS 10 , CS 11 and CS 12 each connected in parallel to one of the six switches.
- switchesare MOSFET switches.
- the switchesmay be switches with intrinsic diodes or switches connected in parallel with anti-parallel diodes.
- this type of rectifier device 30may be used for any of the above embodiments and any of the embodiments below. Moreover, it may be used for any configuration of the transformer device (delta-delta, delta-star, star-delta, star-star).
- the resonant circuit 20is here similar to the resonant circuit of FIG. 6 and FIG. 4 .
- the resonant circuit 20further comprises one magnetizing inductor Lm 1 , Lm 2 , Lm 3 connected in parallel with each of the primary windings LP 1 , LP 2 , LP 3 .
- the three primary windings LP 1 , LP 2 , LP 3 together with the three resonant tank devices RT 1 , RT 2 , RT 3are configured in a star-configuration.
- a first magnetizing inductor Lm 1is connected in parallel with the first primary winding LP 1 .
- a second magnetizing inductor Lm 2is connected in parallel with the second primary winding LP 2 .
- a third magnetizing inductor Lm 3is connected in parallel with the third primary winding LP 3 . The magnetizing inductor will influence on the resonance of the resonant circuit.
- the magnetizing inductorsmay be magnetic coupled inductor (three phase), it may be three single inductors, or it may be fully integrated in the transformer device.
- the first resonant tank devicecomprises the first resonant inductor LR 1 and the first resonant capacitor CR 1 connected in series with the first primary winding LP 1 between the first resonant circuit input node 11 and a primary common node 25 .
- the second resonant tank devicecomprises the second resonant inductor LR 2 and the second resonant capacitor CR 2 connected in series with the second primary winding LP 2 between the second resonant circuit input node 12 and the primary common node 25 .
- the third resonant tank devicecomprises the third resonant inductor LR 3 and the third resonant capacitor CR 3 connected in series with the third primary winding LP 3 between the third resonant circuit input node 13 and the primary common node 25 .
- the primary side of the transformer deviceis here configured as a star-configuration. More precisely, the three primary windings LP 1 , LP 2 , LP 3 together with the three resonant tank devices RT 1 , RT 2 , RT 3 are configured in a star-configuration.
- the secondary side of the transformer devicei.e. the secondary windings
- the secondary side of the transformer deviceare here connected as a star-configuration as in the embodiment shown and described in FIG. 4 . Consequently, the first, second and third transformer switching devices ST 1 , ST 2 , ST 3 are configured so that the three secondary windings LS 1 , LS 2 , LS 3 are in a star-configuration.
- FIG. 9It is now referred to FIG. 9 .
- the primary side of the transformer deviceis here connected as a star-configuration as described with reference to FIG. 8 above.
- the secondary side of the transformer deviceis connected as a delta-configuration as described above with reference to FIG. 3 and FIG. 7 . Consequently, the first, second and third transformer switching devices ST 1 , ST 2 , ST 3 are configured so that the three secondary windings LS 1 , LS 2 , LS 3 are in a delta-configuration.
- the first resonant inductor LR 1 and the first resonant capacitor CR 1are connected in series between the first resonant circuit input node 21 and the primary common node 25 .
- the first primary winding LP 1is connected in parallel with the first resonant capacitor CR 1 .
- the second resonant inductor LR 2 and the second resonant capacitor CR 2are connected in series between the second resonant circuit input node 22 and the primary common node 25 .
- the second primary winding LP 2is connected in parallel with the second resonant capacitor CR 2 .
- the third resonant inductor LR 3 and the third resonant capacitor CR 3are connected in series between the third resonant circuit input node 23 and the primary common node 25 .
- the third primary winding LP 3is connected in parallel with the third resonant capacitor CR 3 .
- the three primary windings LP 1 , LP 2 , LP 3 together with the three resonant tank devices RT 1 , RT 2 , RT 3are configured in a star-configuration.
- the primary side of the transformer deviceis here connected as a star-configuration.
- the secondary side of the transformer deviceis here connected as a star-configuration. Consequently, the first, second and third transformer switching devices ST 1 , ST 2 , ST 3 are configured so that the three secondary windings LSI, LS 2 , LS 3 are in a star-configuration.
- the primary side of the transformer deviceis here connected as a star-configuration as described with reference to FIG. 10 above.
- the secondary side of the transformer deviceis connected as a delta-configuration as described with reference to FIGS. 3 , 7 and 9 above.
- a simulation of the prior art circuit in FIG. 12has been performed by using LTspice from Linear Technology (http://www.linear.com).
- FIG. 13 aThe result of the simulation is shown in FIG. 13 a .
- the input ripple current IV 2here has a peak-to-peak value of approximately 10 A.
- a corresponding simulation of the circuit shown in FIG. 3was also performed in the same way as above, with the same input and output values.
- the converter of FIG. 3has a lot fewer components than the converter of FIG. 12 .
- the current of each branchis decreased, which reduces the losses.
- the low ripple currentalso eliminates the need for electrolytic capacitors.
- the high efficiencymay be increased further at low power by stop switching one of the three branches on the primary side, for example by keeping the switches S 5 and S 6 constant off.
- the converterwill then act as a quasi full bridge resonant converter.
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Abstract
Description
- The present invention relates to a resonant circuit and a resonant DC/DC converter.
- High efficiency galvanic isolation is needed in many power electronic applications. Transformer based isolation may be needed due to safety, change of voltage levels, or functional issues. Some renewable energy sources need galvanic isolation to work properly; among them are different types of thin film solar panels.
- A solar cell panel generates DC power. To supply the DC power to an AC load, either directly or via an AC power distribution network, a power converter system must be connected between the solar cell panel and the AC load for converting the DC power to AC power. Such power converter systems normally comprise a DC/DC converter and a DC/AC converter, the DC/AC converter normally being referred to as an inverter. In addition, the system comprises a control system for controlling the converters, and other components such as filters, fuses, cooling systems etc.
- The DC output power generated by a solar cell panel is changing with sun intensity and temperature. High conversion efficiency is very important to maximize energy harvest from a solar plant in the context of making the investment profitable.
- The series resonant LLC DC/DC converter has become a popular alternative to PWM type converters in many applications. One advantage with the resonant converter is that it can be designed for high efficiency for all load and input/output voltage conditions since it can maintain zero-voltage switching for all operating conditions.
- The practical limitation for a single resonant LLC converter is set by the increasing size and cost of the resonant inductor as the output power increases. Therefore, high power DC/DC-converters are provided as many smaller series resonant LLC converters in parallel, which increase the cost considerably due to the number of components.
- The object of the present invention is to provide a resonant circuit with high efficiency and low cost, and which has high efficiency for a wide input voltage range. Moreover, the object is to reduce the number of components, and thereby reducing the complexity and costs involved. In addition, it is an object of the invention to reduce the ripple currents generated by the converter.
- The object of the invention is also to provide a resonant DC/DC converter with such a resonant circuit.
- The present invention relates to a resonant circuit comprising three resonant circuit input nodes and three resonant circuit output nodes; a transformer device comprising three primary windings and three secondary windings magnetically connected to each other, where the three secondary windings are connected to the three resonant circuit output nodes; first, second and third resonant tank devices each connected between the respective three resonant circuit input nodes and the respective primary windings; first, second and third transformer switching devices for reconfiguring the three secondary windings between a delta-configuration and a star-configuration.
- In one aspect each resonant tank device comprises a resonant inductor and a resonant capacitor.
- In one aspect the three primary windings together with the three resonant tank devices are configured in a delta-configuration.
- In one aspect first, second and third transformer switching devices are provided for reconfiguring the three primary windings between a delta-configuration and a star-configuration.
- In one aspect the first transformer switching device comprises a common terminal connected to second terminal of the second transformer switching device, a first terminal connected to the first resonant output node and a second terminal connected to the common terminal of the third transformer switching device; the second transformer switching device comprises a common terminal connected to second terminal of the third transformer switching device, a first terminal connected to the second resonant circuit output node and a second terminal connected to the common terminal of the first transformer switching device; the third transformer switching device comprises the common terminal connected the second terminal of the first transformer switching device, a first terminal connected to the third resonant circuit output node and a second terminal connected to the common terminal of the second transformer switching device; where the first secondary winding is connected between the first and second terminals of the first transformer switching device, the second secondary winding is connected between the first and second terminals of the second transformer switching device and the third secondary winding is connected between the first and second terminals of the third transformer switching device, where the transformer device is connected in a delta-configuration when the first terminals of the respective transformer switching devices are connected to their common terminal and where the transformer device is connected in a star-configuration when the second terminals of the respective transformer switching devices are connected to their common terminals.
- In one aspect the first resonant inductor, the first resonant capacitor and the first primary winding are connected in series between the first resonant circuit input node and the third resonant circuit input node; the second resonant inductor, the second resonant capacitor and the second primary winding are connected in series between the second resonant circuit input node and the first resonant circuit input node; and the third resonant inductor, the third resonant capacitor and the third primary winding are connected in series between the third resonant circuit input node and the second resonant circuit input node.
- In one aspect a magnetic inductor is connected in parallel with each of the primary windings.
- In one aspect the first resonant inductor, the first resonant capacitor and the first primary winding are connected in series between the first resonant circuit input node and a primary common node; the second resonant inductor, the second resonant capacitor and the second primary winding are connected in series between the second resonant circuit input node and a primary common node; and the third resonant inductor, the third resonant capacitor and the third primary winding are connected in series between the third resonant circuit input node and a primary common node.
- The invention also relates to a resonant DC-DC converter comprising first and second input terminals and first and second output terminals; a switching device connected between the first and second input terminals and three resonant circuit input nodes of a resonant circuit; a rectifier device connected between three resonant circuit output nodes and the first and second output terminals; where the resonant circuit comprises a transformer device comprising three primary windings and three secondary windings magnetically connected to each other, where the three secondary windings are connected to the three resonant circuit output nodes; where the resonant circuit comprises first, second and third resonant tank devices each connected between the respective three resonant circuit input nodes and the respective primary windings; and where the resonant circuit comprises first, second and third transformer switching devices for reconfiguring the three secondary windings between a delta-configuration and a star-configuration.
- In one aspect each resonant tank device comprises a resonant inductor and a resonant capacitor.
- In one aspect the three primary windings are configured in a delta-configuration.
- In one aspect first, second and third transformer switching devices for reconfiguring the three primary windings between a delta-configuration and a star-configuration.
- In one aspect the switching device comprises six switching devices, where each switching device is connected between one of the first or second input terminals and one of the respective switch output nodes.
- In one aspect the rectifier device is a diode rectifier or a synchronous rectifier.
- In the following, embodiments of the invention will be described with reference to the enclosed drawings, where:
FIG. 1 illustrates a power converter system for converting DC power from a solar cell panel to AC power supplied to an AC power distribution network or an AC load;FIG. 2 is a schematic block diagram of the DC/DC converter ofFIG. 1 ;FIG. 3 is a first embodiment of a resonant DC/DC converter;FIG. 4 is a second embodiment of a resonant DC/DC converter;FIG. 5 is a third embodiment of a resonant DC/DC converter;FIG. 6 is a fourth embodiment of a resonant DC/DC converter;FIG. 7 is a fifth embodiment of a resonant DC/DC converter;FIG. 8 is a sixth embodiment of a resonant DC/DC converter;FIG. 9 is a seventh embodiment of a resonant DC/DC converter;FIG. 10 is an eight embodiment of a resonant DC/DC converter;FIG. 11 is a ninth embodiment of a resonant DC/DC converter;FIG. 12 is an illustration of a prior art converter typically used in such applications, comprising two series resonant LLC converters in parallel phase shifted 90 degrees;FIG. 13 ashows the results of a simulation of the circuit inFIG. 12 ; andFIG. 13 bshows the results of a simulation of the circuit inFIG. 3 .- It is now referred to
FIG. 1 . Apower converter system 1 is connected between aDC power source 2 and an AC load orAC distribution network 3. The DC power source is here a solar cell panel or a module comprising several solar cell panels, but can be any other type of suitable energy source. - The power converter system converts the input DC power to an AC output power. The power converter system comprises a DC/DC converter and an inverter (DC/AC converter), filters etc as mentioned in the description above. Moreover, the system comprises a control system for controlling the DC/DC converter, the inverter and other components. The system in
FIG. 1 is in general known for a skilled person. - The present invention relates to the DC/DC converter in
FIG. 1 . It is now referred toFIG. 2 .FIG. 2 illustrates a resonant DC/DC converter comprising aswitching device 10, aresonant circuit 20 and arectifier 30 connected to each other between first and second input terminals IT1, IT2 and first and second output terminals OT1, OT2. - The
switching device 10 comprises six switches S1, S2, S3, S4, S5, S6, where each switch is connected between one of the first or second input terminals IT1, IT2 and one of the respective input nodes of the resonant circuit, hereinafter referred to as resonantcircuit input nodes - The first switch S1 is connected between the first input terminal IT1 and the first
switch output terminal 11, a second switch S2 is connected between the firstswitch output node 11 and the second input terminal IT2, a third switch S3 is connected between the first input terminal IT1 and the secondswitch output terminal 12, a fourth switch S4 is connected between the secondswitch output node 12 and the second input terminal IT2, a fifth switch S5 is connected between the first input terminal IT1 and the thirdswitch output terminal 13 and a sixth switch S6 is connected between the thirdswitch output node 13 and the second input terminal IT2. The switches S1, S2, S3, S4, S5, and S6 are MOSFET switches. Alternatively, the switches may be switches with intrinsic diodes or switches connected in parallel with anti-parallel diodes. - The switching
device 10 further comprises switch capacitors CS1, CS2, CS3, CS4, CS5 and CS6, each connected in parallel with one of the respective switches51, S2, S3, S4, S5, S6. - The switches S1, S2, S3, S4, S5, and S6 are controlled by the control system illustrated in
FIG. 1 . It should be noted that the switches S1-S6 can be controlled by frequency, PWM, or as a hybrid of both of these. - As mentioned above, the
resonant circuit 20 comprises three resonantcircuit input nodes resonant circuit 20 also comprises three resonantcircuit output nodes - The
rectifier device 30 is connected between the three resonantcircuit output nodes rectifier device 30 ofFIG. 2 is a diode rectifier. - The
rectifier device 30 ofFIG. 2 comprises a first diode D1 with its anode connected to the firstrectifier input node 21 and its cathode connected to the first output terminal OT1, a second diode D2 with its anode connected to the second output terminal OT2 and its cathode connected to the firstrectifier input node 21, a third diode D3 with its anode connected to the secondrectifier input node 22 and its cathode connected to the first output terminal OT1, a fourth diode D4 with its anode connected to the second output terminal OT2 and its cathode connected to the secondrectifier input node 22, a fifth diode D5 with its anode connected to the thirdrectifier input node 23 and its cathode connected to the first output terminal OT1 and a sixth diode D6 with its anode connected to the second output terminal OT2 and its cathode connected to the thirdrectifier input node 23. - Alternatively, the
rectifier device 30 may be a synchronous rectifier. - In
FIG. 2 , it is shown that an output capacitor Cout is connected between the first and second output terminals OT1, OT2. - It should be noted that the switching
device 10 and therectifier device 30 are considered known for a skilled person. Also the control of the switches in theswitching device 10 is considered known for a skilled person. The control of the switches is based on soft switching or so-called zero voltage switching (ZVS), where the voltage over the switch is equal to or near zero V when the switch is turned on/off. - The
resonant circuit 20 according to the invention will now be described with reference toFIG. 2 . The resonant circuit comprises a transformer device TR comprising three primary windings LP1, LP2, LP3 and three secondary windings LS1, LS2, LS3 magnetically connected to each other, where the three secondary windings LS1, LS2, LS3 are connected to the three resonantcircuit output nodes resonant circuit 20 comprises first, second and third resonant tank devices RT1, RT2, RT3 each connected between the respective three resonantcircuit input nodes - The transformer device TR may be a three phase transformer. In an alternative embodiment, also three single phased transformers may be used. The primary windings LP1, LP2, LP3 may be configured in a delta-configuration or in a star-configuration. More precisely, the three primary windings LP1, LP2, LP3 together with the three resonant tank devices RT1, RT2, RT3 may be configured in a delta-configuration or in a star configuration, as will be described in detail below. The secondary windings LS1, LS2, LS3 may be configured in a delta-configuration or in a star-configuration.
- As will be described below, the
resonant circuit 20 comprises first, second and third transformer switching devices ST1, ST2, ST3 for reconfiguring the three secondary windings LS1, LS2, LS3 between a delta-configuration and a star-configuration. - Moreover, the
resonant circuit 20 may comprise first, second and third transformer switching devices ST1, ST2, ST3 for reconfiguring the three primary windings LP1, LP2, LP3 between a delta-configuration and a star-configuration. - The transformer switching devices ST1, ST2, ST3 may be controlled by the control system.
- Each resonant tank device RT1, RT2, RT3 comprises a resonant inductor LR1, LR2, LR3 and a resonant capacitor CR1, CR2, CR3. The resonant tank device, together with the primary windings LP1, LP2, LP3 provides resonance for the zero-voltage switching of the
switching device 10. The resonant tank devices may be partially or fully integrated in the transformer device, utilizing the leakage inductance and other parasitic elements. - The voltage between the first and second input terminals IT1 and IT2 is referred to as Uin. The voltage between the first and second output terminals OT1 and OT2 is referred to as Uout.
- It should be noted that the voltage and/or current in each of the three branches of the
resonant device 20 has the same magnitude, but are displaced in time by120 electrical degrees. Consequently, thedevice 20 together withdevices - It should be noted that in the embodiments described below, the first, second and third transformer switching devices ST1, ST2, ST3 for reconfiguring the three secondary windings LS1, LS2, LS3 between a delta-configuration and a star-configuration are not shown in all drawings. However, the secondary windings LS1, LS2, LS3 are either in a delta-configuration or in a star-configuration in all embodiments below.
- It is now referred to
FIG. 3 . Here, the first resonant tank device comprises the first resonant inductor LR1 and the first resonant capacitor CR1 connected in series with the first primary winding LP1 between the first resonantcircuit input node 11 and the third resonantcircuit input node 13. The second resonant tank device comprises the second resonant inductor LR2 and the second resonant capacitor CR2 connected in series with the second primary winding LP2 between the second resonantcircuit input node 12 and the first resonantcircuit input node 11. The third resonant tank device comprises the third resonant inductor LR3 and the third resonant capacitor CR3 connected in series with the third primary winding LP3 between the third resonantcircuit input node 13 and the second resonantcircuit input node 12. - The secondary windings LS1, LS2, LS3 are connected between the resonant
circuit output nodes rectifier input nodes rectifier input nodes rectifier input nodes - Consequently, the primary side of the transformer device TR is connected in a delta-configuration and the secondary side of the transformer device TR is connected in a delta-configuration. i.e. the first, second and third transformer switching devices ST1, ST2, ST3 are configured so that the three secondary windings LS1, LS2, LS3 are in a delta-configuration. It should be noted that the term “primary side” here denotes the primary windings and the components of the resonant tank. Hence, the three primary windings LP1, LP2, LP3 together with the three resonant tank devices RT1, RT2, RT3 are configured in a delta-configuration.
- It should be noted that also here the resonant tank devices may be partially or fully integrated in the transformer device, as described above.
- It is now referred to
FIG. 4 . - Here, the resonant tank devices and the primary side of the transformer device are configured as in the first embodiment above.
- The secondary windings are here also connected between the resonant
circuit output nodes common node 24 is shown in theFIG. 4 . The first secondary winding LS1 is connected between the first resonantcircuit output node 21 and the secondarycommon node 24. The second secondary winding LS2 is connected between the second resonantcircuit output node 22 and the secondarycommon node 24. The third secondary winding LS3 is connected between the third resonantcircuit output node 23 and the secondarycommon node 24. - Consequently, the primary side of the transformer device TR is connected in a delta-configuration and the secondary side of the transformer device TR is connected in a star-configuration, i.e. the first, second and third transformer switching devices ST1, ST2, ST3 are configured so that the three secondary windings LS1, LS2, LS3 are in a star-configuration. It should be noted that the term “primary side” here denotes the primary windings and the components of the resonant tank. Hence, the three primary windings LP1, LP2, LP3 together with the three resonant tank devices RT1, RT2, RT3 are configured in a delta-configuration.
- The secondary
common node 24 may be considered as the common point of the star-configured transformer. Note that the term “secondary” is here used to denote the location on the secondary side of the transformer device. - Also here it should be noted that the resonant tank devices may be partially or fully integrated in the transformer device.
- It is now referred to
FIG. 5 aandFIG. 5 b. - Here, the resonant tank devices and the primary side of the transformer device is configured as in the first embodiment above.
- The secondary windings are here also connected between the resonant
circuit output nodes resonant circuit 20 comprises first, second and third transformer switching devices ST1, ST2, ST3 for reconfiguring the three secondary windings LS1, LS2, LS3 between a delta-configuration and a star-configuration. The terminology of the first transformer switching device ST1 is shown inFIG. 5 b. The switching of the transformer switching devices ST1, ST2, ST3 may be performed by means of relay devices, or any other switching devices, controlled by the control system. - The first transformer switching device ST1 comprises a common terminal Tcom connected to a second terminal T2 of the second transformer switching device ST2, a first terminal T1 connected to the first resonant
circuit output node 21 and a second terminal T2 connected to the common terminal Tcom of the third transformer switching device ST3. - The second transformer switching device ST2 comprises a common terminal Tcom connected to a second terminal T2 of the third transformer switching device ST3, a first terminal T1 connected to the second resonant
circuit output node 22 and a second terminal T2 connected to the common terminal Tcom of the first transformer switching device ST1. - The third transformer switching device ST3 comprises the common terminal Tcom connected the second terminal T2 of the first transformer switching device ST1, a first terminal T1 connected to the third resonant
circuit output node 23 and a second terminal T2 connected to the common terminal Tcom of the second transformer switching device ST2. - The first secondary winding LS1 is connected between the first and second terminals T1, T2 of the first transformer switching device ST1, the second secondary winding LS2 is connected between the first and second terminals T1, T2 of the second transformer switching device ST2 and the third secondary winding LS3 is connected between the first and second terminals TI, T2 of the third transformer switching device ST3.
- The transformer device TR is connected in a delta-delta configuration when the first terminals T1 of the respective transformer switching devices are connected to their common terminal Tcom. The transformer device TR is connected in a delta-star configuration when the second terminals T2 of the respective transformer switching devices are connected to their common terminals Tcom.
- The transformer switching devices ST1, ST2, ST3 are be controlled by the control system. For example, the input voltage Uin may be measured and given as an input to the control system. If the measured input voltage Uin is below a certain threshold value, the transformer switching devices ST1, ST2, ST3 is switched so that the secondary side of the transformer device is connected in a star configuration. If the measured input voltage Uin is above a certain threshold value, the transformer switching devices ST1, ST2, ST3 is switched so that the secondary side of the transformer device is connected in a delta-configuration. Consequently, the output voltage Uout decreases.
- In an alternative embodiment, such transformer switching devices ST1, ST2, ST3 may be provided on the primary side in addition to the transformer switching devices ST1, ST2, ST3 on the secondary side. Hence, the primary side of the transformer device may be reconfigured between a delta-configuration and a star-configuration.
- It is now referred to
FIG. 6 . - The
resonant circuit 20 is here similar to theresonant circuit 20 of the second embodiment (FIG. 4 ). - Here, the
rectifier device 30 is not a diode rectifier. Instead, therectifier device 30 is a synchronous rectifier with six switches S7, S8, S9, S10, S11, S12 instead of the six diodes. The rectifier device comprises six switch capacitors CS7, CS8, CS9, CS10, CS11 and CS12 each connected in parallel to one of the six switches. - Also these switches are MOSFET switches. Alternatively, the switches may be switches with intrinsic diodes or switches connected in parallel with anti-parallel diodes.
- It should be noted that this type of
rectifier device 30 may be used for any of the above embodiments and any of the embodiments below. Moreover, it may be used for any configuration of the transformer device (delta-delta, delta-star, star-delta, star-star). - It should be also be noted that with this type of rectifier device, it would be possible to achieve bidirectional power flow, i.e. power may flow from input terminals to output terminals, but also from output terminals to input terminals as defined in
FIG. 6 . This type of converter is normally referred to as a bidirectional dc-dc converter. - It is now referred to
FIG. 7 . Theresonant circuit 20 is here similar to the resonant circuit ofFIG. 6 andFIG. 4 . Here, theresonant circuit 20 further comprises one magnetizing inductor Lm1, Lm2, Lm3 connected in parallel with each of the primary windings LP1, LP2, LP3. Hence, the three primary windings LP1, LP2, LP3 together with the three resonant tank devices RT1, RT2, RT3 are configured in a star-configuration. - A first magnetizing inductor Lm1 is connected in parallel with the first primary winding LP1. A second magnetizing inductor Lm2 is connected in parallel with the second primary winding LP2. A third magnetizing inductor Lm3 is connected in parallel with the third primary winding LP3. The magnetizing inductor will influence on the resonance of the resonant circuit.
- The magnetizing inductors may be magnetic coupled inductor (three phase), it may be three single inductors, or it may be fully integrated in the transformer device.
- It is now referred to
FIG. 8 . Here, the first resonant tank device comprises the first resonant inductor LR1 and the first resonant capacitor CR1 connected in series with the first primary winding LP1 between the first resonantcircuit input node 11 and a primarycommon node 25. The second resonant tank device comprises the second resonant inductor LR2 and the second resonant capacitor CR2 connected in series with the second primary winding LP2 between the second resonantcircuit input node 12 and the primarycommon node 25. The third resonant tank device comprises the third resonant inductor LR3 and the third resonant capacitor CR3 connected in series with the third primary winding LP3 between the third resonantcircuit input node 13 and the primarycommon node 25. - Consequently, the primary side of the transformer device is here configured as a star-configuration. More precisely, the three primary windings LP1, LP2, LP3 together with the three resonant tank devices RT1, RT2, RT3 are configured in a star-configuration.
- The secondary side of the transformer device (i.e. the secondary windings) are here connected as a star-configuration as in the embodiment shown and described in
FIG. 4 . Consequently, the first, second and third transformer switching devices ST1, ST2, ST3 are configured so that the three secondary windings LS1, LS2, LS3 are in a star-configuration. - It is now referred to
FIG. 9 . - The primary side of the transformer device is here connected as a star-configuration as described with reference to
FIG. 8 above. - The secondary side of the transformer device is connected as a delta-configuration as described above with reference to
FIG. 3 andFIG. 7 . Consequently, the first, second and third transformer switching devices ST1, ST2, ST3 are configured so that the three secondary windings LS1, LS2, LS3 are in a delta-configuration. - It is now referred to
FIG. 10 . - Here, the first resonant inductor LR1 and the first resonant capacitor CR1 are connected in series between the first resonant
circuit input node 21 and the primarycommon node 25. The first primary winding LP1 is connected in parallel with the first resonant capacitor CR1. - The second resonant inductor LR2 and the second resonant capacitor CR2 are connected in series between the second resonant
circuit input node 22 and the primarycommon node 25. The second primary winding LP2 is connected in parallel with the second resonant capacitor CR2. - The third resonant inductor LR3 and the third resonant capacitor CR3 are connected in series between the third resonant
circuit input node 23 and the primarycommon node 25. The third primary winding LP3 is connected in parallel with the third resonant capacitor CR3. - Hence, the three primary windings LP1, LP2, LP3 together with the three resonant tank devices RT1, RT2, RT3 are configured in a star-configuration.
- The primary side of the transformer device is here connected as a star-configuration. The secondary side of the transformer device is here connected as a star-configuration. Consequently, the first, second and third transformer switching devices ST1, ST2, ST3 are configured so that the three secondary windings LSI, LS2, LS3 are in a star-configuration.
- It is now referred to
FIG. 11 . The primary side of the transformer device is here connected as a star-configuration as described with reference toFIG. 10 above. The secondary side of the transformer device is connected as a delta-configuration as described with reference toFIGS. 3 ,7 and9 above. - As mentioned in the introduction, the most common prior art circuit for such types of resonant DC/DC converters are two series resonant LLC converters, as illustrated in
FIG. 12 a. - A simulation of the prior art circuit in
FIG. 12 has been performed by using LTspice from Linear Technology (http://www.linear.com). In the simulation, the input and output values for the simulation were Uout=350 Vdc, Iout=17 Adc, Uin=350 Vdc. - The result of the simulation is shown in
FIG. 13 a. Here it is shown that the input ripple current IV2 here has a peak-to-peak value of approximately 10 A. - A corresponding simulation of the circuit shown in
FIG. 3 was also performed in the same way as above, with the same input and output values. - The result of this simulation is shown in
FIG. 13 b. From the results ofFIG. 13 bthe input ripple current IV1 here has a peak-to-peak value of approximately 5 A. - Consequently, the input ripple current has been clearly reduced for the present invention compared with prior art.
- Moreover, it can be seen that the converter of
FIG. 3 has a lot fewer components than the converter ofFIG. 12 . According to the three phase design of the resonant tank device and transformer device, the current of each branch is decreased, which reduces the losses. - It is also achieved a circuit with large flexibility with respect to the controllable ratio of the input voltage/output voltage. The low current through the resonant tank makes it Well suited for a high impedance resonant tank. In addition, reconfiguration of the transformer device and resonant tank device for example from a delta-delta-configuration to a delta-star-configuration for low input voltages improves this controllable ratio further.
- The low ripple current also eliminates the need for electrolytic capacitors.
- It should be noted that the high efficiency may be increased further at low power by stop switching one of the three branches on the primary side, for example by keeping the switches S5 and S6 constant off. The converter will then act as a quasi full bridge resonant converter.
Claims (17)
1. A resonant circuit comprising:
a first resonant circuit input node, a second resonant circuit input node, and a third resonant circuit input node;
a first resonant circuit output node, a second resonant circuit output node, and a third resonant circuit output node;
a transformer device comprising:
a first primary winding, a second primary winding, and a third primary winding;
a first secondary winding, a second secondary winding, and a third secondary winding,
wherein the first, second, and third primary windings are magnetically connected to the first, second, and third secondary windings each other, and
wherein the first, second, and third secondary windings are connected to the first, second, and third resonant circuit output nodes;
a first resonant tank device, a second resonant tank device, and a third resonant tank device each connected between the respective resonant circuit input nodes and the respective primary windings; and
a first transformer switching device, a second transformer switching device, and a third transformer switching device arranged to reconfigure the first, second, and third secondary windings between a delta-configuration and a star-configuration,
wherein the first, second, and third primary windings together with the first, second, and third resonant tank devices are configured in the delta-configuration.
2. The resonant circuit according toclaim 1 , wherein each resonant tank device comprises a resonant inductor and a resonant capacitor.
3. (canceled)
4. (canceled)
5. (canceled)
6. The resonant circuit according toclaim 2 , wherein:
the resonant inductor of the first resonant tank device, the resonant capacitor of the first resonant tank device, and the first primary winding are connected in series between the first resonant circuit input node and the third resonant circuit input node,
the resonant inductor of the second resonant tank device, the resonant capacitor of the second resonant tank device, and the second primary winding are connected in series between the second resonant circuit input node and the first resonant circuit input node, and
the resonant inductor of the third resonant tank device, the resonant capacitor of the third resonant tank device, and the third primary winding are connected in series between the third resonant circuit input node and the second resonant circuit input node.
7. The resonant circuit according toclaim 2 , wherein a magnetic inductor is connected in parallel with each of the primary windings.
8. The resonant circuit according toclaim 2 , wherein:
the resonant inductor of the first resonant tank device, the resonant capacitor of the first resonant tank device, and the first primary winding are connected in series between the first resonant circuit input node and a primary common node,
the resonant inductor of the second resonant tank device, the resonant capacitor of the second resonant tank device, and the second primary winding are connected in series between the second resonant circuit input node and the primary common node, and
the resonant inductor of the third resonant tank device, the resonant capacitor of the third resonant tank device, and the third primary winding are connected in series between the third resonant circuit input node and the primary common node.
9. A resonant DC-DC converter comprising:
a first input terminal and a second input terminal;
a first output terminal and a second output terminal;
a switching device connected between the first and second input terminals and a first resonant circuit input node, a second resonant circuit input node, and a third resonant circuit input node of a resonant circuit;
a rectifier device connected between a first resonant circuit output node, a second resonant circuit output node, and a third resonant circuit output node and the first and second output terminals,
wherein the resonant circuit comprises a transformer device comprising:
a first primary winding, a second primary winding, and a third primary winding;
a first secondary winding, a second secondary winding, and a third secondary winding,
wherein the first, second, and third primary windings are magnetically connected to the first, second, and third secondary windings, wherein the the first, second, and third secondary windings are connected to the first, second, and third resonant circuit output nodes,
wherein the resonant circuit comprises a first resonant tank device, a second resonant tank device, and a third resonant tank device each connected between the respective first, second, and third resonant circuit input nodes and the respective first, second, and third primary windings, and
wherein the resonant circuit comprises a first transformer switching device, a second transformer switching device, and a third transformer switching device arranged to reconfigure the first, second, and third secondary windings between a delta-configuration and a star-configuration and the first, second, and third primary windings are configured in a delta-configuration.
10. The converter according toclaim 9 , wherein each resonant tank device comprises a resonant inductor and a resonant capacitor.
11. (canceled)
12. (canceled)
13. The converter according toclaim 9 , wherein the switching device comprises six switching devices, wherein each switching device is connected between one of the first or second input terminals and one of the respective switch output nodes.
14. The converter according toclaim 9 , wherein the rectifier device is a diode rectifier or a synchronous rectifier.
15. The converter according toclaim 10 , wherein the switching device comprises six switching devices, wherein each switching device is connected between one of the first or second input terminals and one of the respective switch output nodes.
16. The converter according toclaim 10 , wherein the rectifier device is a diode rectifier or a synchronous rectifier.
17. The converter according toclaim 13 , wherein the rectifier device is a diode rectifier or a synchronous rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/516,375US20120320638A1 (en) | 2009-12-17 | 2010-12-10 | Resonant circuit and resonant dc/dc converter |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28721009P | 2009-12-17 | 2009-12-17 | |
| GB0922081.5 | 2009-12-17 | ||
| GB0922081AGB2476278A (en) | 2009-12-17 | 2009-12-17 | Resonant circuit with transformer having three sets of windings |
| US13/516,375US20120320638A1 (en) | 2009-12-17 | 2010-12-10 | Resonant circuit and resonant dc/dc converter |
| PCT/NO2010/000454WO2011074977A2 (en) | 2009-12-17 | 2010-12-10 | Resonant circuit and resonant dc/dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20120320638A1true US20120320638A1 (en) | 2012-12-20 |
Family
ID=41717130
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/516,357Active2032-02-21US9240723B2 (en) | 2009-12-17 | 2010-12-09 | Resonant circuit and resonant DC/DC converter |
| US13/516,375AbandonedUS20120320638A1 (en) | 2009-12-17 | 2010-12-10 | Resonant circuit and resonant dc/dc converter |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/516,357Active2032-02-21US9240723B2 (en) | 2009-12-17 | 2010-12-09 | Resonant circuit and resonant DC/DC converter |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US9240723B2 (en) |
| EP (2) | EP2514086A2 (en) |
| CN (2) | CN102812628B (en) |
| AU (2) | AU2010330952A1 (en) |
| CA (2) | CA2783557A1 (en) |
| GB (1) | GB2476278A (en) |
| IN (2) | IN2012DN05063A (en) |
| WO (2) | WO2011074976A2 (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130201725A1 (en)* | 2009-12-17 | 2013-08-08 | Eltek As | Resonant circuit and resonant dc/dc converter |
| US20130329465A1 (en)* | 2012-06-11 | 2013-12-12 | Byd Company Limited | Quasi-resonant device and system and method for quasi-resonant control of switching power |
| US20140097693A1 (en)* | 2011-05-24 | 2014-04-10 | Siemens Aktiengesellschaft | Electrical feeding device |
| US20140232282A1 (en)* | 2013-02-20 | 2014-08-21 | Nxp B.V. | Resonant converter |
| US8824179B2 (en)* | 2012-08-14 | 2014-09-02 | Rudolf Limpaecher | Soft-switching high voltage power converter |
| US20140368175A1 (en)* | 2013-06-14 | 2014-12-18 | Korea Electrotechnology Research Institute | High precision dc to dc converter with wide load range and gate drive circuit for use therein |
| EP2887523A1 (en)* | 2013-12-20 | 2015-06-24 | Huawei Technologies Co., Ltd. | Resonant bidirectional converter, uninterruptible power supply apparatus, and control method |
| US9673716B2 (en)* | 2015-06-26 | 2017-06-06 | Lite-On Technology Corp. | Resonant converter with three switches |
| TWI618328B (en)* | 2015-07-17 | 2018-03-11 | 矽力杰半導體技術（杭州）有限公司 | Driving circuit and radio energy transmitting end using the same |
| US20180183351A1 (en)* | 2016-12-27 | 2018-06-28 | Fuji Electric Co., Ltd. | Power supply and simplification of structure of power supply |
| US20180198373A1 (en)* | 2016-07-07 | 2018-07-12 | Huawei Technologies Co., Ltd. | Four-switch three phase dc-dc resonant converter |
| US10381938B2 (en)* | 2016-05-13 | 2019-08-13 | Huawei Technologies Co., Ltd. | Resonant DC-DC converter |
| US20220006390A1 (en)* | 2020-07-02 | 2022-01-06 | Delta Electronics, Inc. | Isolated multi-phase dc/dc converter with reduced quantity of blocking capacitors |
| US20230009358A1 (en)* | 2021-07-06 | 2023-01-12 | Lite-On Electronics (Guangzhou) Limited | Three-phase interleaved resonant converter and power circuit |
| US20240348170A1 (en)* | 2021-12-03 | 2024-10-17 | Ace Power And Technology Co., Ltd | Direct current to direct current (dcdc) converter and control method |
| US20250132686A1 (en)* | 2023-10-20 | 2025-04-24 | Infineon Technologies Austria Ag | Multi-Phase Resonant Power Converter |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK2670041T3 (en)* | 2012-06-01 | 2015-04-20 | Aeg Power Solutions Gmbh | Power supply device with an inverter for generating N-phase alternating current |
| CN103337961B (en)* | 2013-06-19 | 2015-10-28 | 南京航空航天大学 | A kind of high-voltage variable is than the control method of two-way DC converter |
| CN105099230B (en) | 2014-04-16 | 2018-07-31 | 华为技术有限公司 | Controlled resonant converter and its synchronous rectification translation circuit |
| CN105743356B (en)* | 2014-12-09 | 2019-01-11 | 比亚迪股份有限公司 | A kind of LLC resonant converter |
| CN106469984B (en)* | 2015-08-21 | 2019-06-04 | 维谛技术有限公司 | A kind of power inverter |
| CN106469985B (en)* | 2015-08-21 | 2019-06-04 | 维谛技术有限公司 | A kind of power inverter |
| JP6512064B2 (en)* | 2015-10-29 | 2019-05-15 | Tdk株式会社 | Switching power supply |
| JP6617588B2 (en)* | 2016-02-02 | 2019-12-11 | Tdk株式会社 | Switching power supply |
| GB201602044D0 (en) | 2016-02-04 | 2016-03-23 | Eltek As | Bidirectional DC-DC resonant converter |
| US9871450B2 (en)* | 2016-04-25 | 2018-01-16 | Vanner, Inc. | Isolated step-up converter |
| US10186949B1 (en)* | 2017-11-09 | 2019-01-22 | International Business Machines Corporation | Coupled-inductor DC-DC power converter |
| CN110417267A (en) | 2018-04-26 | 2019-11-05 | 比亚迪股份有限公司 | DCDC converters, on-board chargers and electric vehicles |
| US10790081B2 (en) | 2018-05-21 | 2020-09-29 | Virginia Tech Intellectual Properties, Inc. | Interleaved converters with integrated magnetics |
| US11404967B2 (en)* | 2018-06-12 | 2022-08-02 | Virginia Tech Intellectual Properties, Inc. | Interleaved converters with integrated magnetics |
| US10873265B2 (en) | 2018-06-12 | 2020-12-22 | Virginia Tech Intellectual Properties, Inc. | Bidirectional three-phase direct current (DC)/DC converters |
| FR3084797B1 (en)* | 2018-07-31 | 2020-08-28 | Valeo Siemens Eautomotive Norway As | CONTINUOUS-CONTINUOUS VOLTAGE CONVERTER TO RESONANCE |
| TWI670923B (en)* | 2018-09-12 | 2019-09-01 | 國立臺灣科技大學 | Three-phase multi-level series-series resonant converter |
| CN109444524B (en)* | 2018-09-30 | 2021-06-08 | 广州金升阳科技有限公司 | Primary winding resonance trough sampling circuit and sampling method |
| US10483862B1 (en) | 2018-10-25 | 2019-11-19 | Vanner, Inc. | Bi-directional isolated DC-DC converter for the electrification of transportation |
| TWI685169B (en)* | 2018-11-15 | 2020-02-11 | 亞力電機股份有限公司 | Bi-directional energy storage system |
| TWI685187B (en)* | 2018-11-15 | 2020-02-11 | 亞力電機股份有限公司 | Bi-directional dc-to-dc converter |
| CN110401352A (en)* | 2019-07-12 | 2019-11-01 | 国创新能源汽车能源与信息创新中心(江苏)有限公司 | A kind of two-way resonance converter |
| CN111030152B (en)* | 2019-12-18 | 2021-10-12 | 山东鲁软数字科技有限公司智慧能源分公司 | Energy storage converter system and control method thereof |
| US11018589B1 (en)* | 2020-02-05 | 2021-05-25 | Smpc Technologies Ltd | Systems, methods, and apparatus for balanced current sharing in paralleled resonant converters |
| CN114070076B (en)* | 2020-08-04 | 2023-08-08 | 明纬(广州)电子有限公司 | DC voltage conversion device |
| US12212247B2 (en)* | 2021-10-20 | 2025-01-28 | Virginia Tech Intellectual Properties, Inc. | Three-phase LLC converters with integrated magnetics |
| EP4422051A1 (en) | 2023-02-22 | 2024-08-28 | Delta Electronics (Thailand) Public Co., Ltd. | Multi-phase dc/dc converter circuit |
| EP4503066A1 (en) | 2023-08-02 | 2025-02-05 | Delta Electronics (Thailand) Public Co., Ltd. | Multi-phase transformer and llc resonant converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7348764B2 (en)* | 2006-07-13 | 2008-03-25 | Ocean Power Technologies, Inc. | Coil switching of an electric generator |
| US20130201725A1 (en)* | 2009-12-17 | 2013-08-08 | Eltek As | Resonant circuit and resonant dc/dc converter |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573112A (en)* | 1980-06-04 | 1982-01-08 | Fujitsu Ltd | Output voltage switching system |
| JPS6116498A (en) | 1984-07-03 | 1986-01-24 | Toshiba Corp | X-ray high voltage generator |
| JPH05268767A (en)* | 1992-03-17 | 1993-10-15 | Toyota Autom Loom Works Ltd | Push-pull dc-dc converter |
| JPH0739152A (en)* | 1993-07-23 | 1995-02-07 | Victor Co Of Japan Ltd | Power supply apparatus |
| JP4406967B2 (en)* | 1999-09-03 | 2010-02-03 | サンケン電気株式会社 | DC power supply |
| US7116080B2 (en)* | 2004-07-07 | 2006-10-03 | Visteon Global Technologies, Inc. | Alternator rectifier with coil-sensor controlled MOSFETs |
| WO2006079985A2 (en)* | 2005-01-28 | 2006-08-03 | Koninklijke Philips Electronics N.V. | Modular power supply for x-ray tubes and method thereof |
| KR100547289B1 (en)* | 2005-05-18 | 2006-01-26 | 주식회사 피에스텍 | Synchronous Rectified Series Resonant Converter Operates in Intermittent Mode |
| US8259477B2 (en)* | 2007-05-30 | 2012-09-04 | The Regents Of The University Of California | Multiphase resonant converter for DC-DC applications |
| JP5346028B2 (en)* | 2007-09-28 | 2013-11-20 | アクセス ビジネス グループ インターナショナル リミテッド ライアビリティ カンパニー | Multiphase induction power supply system |
| JP4301342B2 (en)* | 2007-12-18 | 2009-07-22 | サンケン電気株式会社 | DC / DC converter |
| EP2299580A3 (en)* | 2009-06-24 | 2011-07-27 | STMicroelectronics S.r.l. | Multi-phase resonant converter and method of controlling it |
- 2009
- 2009-12-17GBGB0922081Apatent/GB2476278A/ennot_activeWithdrawn
- 2010
- 2010-12-09CNCN201080057825.7Apatent/CN102812628B/enactiveActive
- 2010-12-09EPEP10796507Apatent/EP2514086A2/ennot_activeCeased
- 2010-12-09CACA2783557Apatent/CA2783557A1/ennot_activeAbandoned
- 2010-12-09AUAU2010330952Apatent/AU2010330952A1/ennot_activeAbandoned
- 2010-12-09ININ5063DEN2012patent/IN2012DN05063A/enunknown
- 2010-12-09USUS13/516,357patent/US9240723B2/enactiveActive
- 2010-12-09WOPCT/NO2010/000453patent/WO2011074976A2/enactiveApplication Filing
- 2010-12-10EPEP10796508.9Apatent/EP2517346B1/enactiveActive
- 2010-12-10USUS13/516,375patent/US20120320638A1/ennot_activeAbandoned
- 2010-12-10CACA2783800Apatent/CA2783800A1/ennot_activeAbandoned
- 2010-12-10CNCN201080057823.8Apatent/CN103004074B/enactiveActive
- 2010-12-10AUAU2010330953Apatent/AU2010330953A1/ennot_activeAbandoned
- 2010-12-10WOPCT/NO2010/000454patent/WO2011074977A2/enactiveApplication Filing
- 2010-12-10ININ5064DEN2012patent/IN2012DN05064A/enunknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7348764B2 (en)* | 2006-07-13 | 2008-03-25 | Ocean Power Technologies, Inc. | Coil switching of an electric generator |
| US20130201725A1 (en)* | 2009-12-17 | 2013-08-08 | Eltek As | Resonant circuit and resonant dc/dc converter |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130201725A1 (en)* | 2009-12-17 | 2013-08-08 | Eltek As | Resonant circuit and resonant dc/dc converter |
| US9240723B2 (en)* | 2009-12-17 | 2016-01-19 | Eltek As | Resonant circuit and resonant DC/DC converter |
| US20140097693A1 (en)* | 2011-05-24 | 2014-04-10 | Siemens Aktiengesellschaft | Electrical feeding device |
| US20130329465A1 (en)* | 2012-06-11 | 2013-12-12 | Byd Company Limited | Quasi-resonant device and system and method for quasi-resonant control of switching power |
| US9112407B2 (en)* | 2012-06-11 | 2015-08-18 | Shenzhen Byd Auto R&D Company Limited | Quasi-resonant device and system and method for quasi-resonant control of switching power |
| US8824179B2 (en)* | 2012-08-14 | 2014-09-02 | Rudolf Limpaecher | Soft-switching high voltage power converter |
| US20140232282A1 (en)* | 2013-02-20 | 2014-08-21 | Nxp B.V. | Resonant converter |
| US9166484B2 (en)* | 2013-02-20 | 2015-10-20 | Nxp B.V. | Resonant converter |
| US20140368175A1 (en)* | 2013-06-14 | 2014-12-18 | Korea Electrotechnology Research Institute | High precision dc to dc converter with wide load range and gate drive circuit for use therein |
| US9246389B2 (en)* | 2013-06-14 | 2016-01-26 | Korea Electro Technology Research Institute | High precision DC to DC converter with wide load range and gate drive circuit for use therein |
| EP2887523A1 (en)* | 2013-12-20 | 2015-06-24 | Huawei Technologies Co., Ltd. | Resonant bidirectional converter, uninterruptible power supply apparatus, and control method |
| US9673716B2 (en)* | 2015-06-26 | 2017-06-06 | Lite-On Technology Corp. | Resonant converter with three switches |
| TWI618328B (en)* | 2015-07-17 | 2018-03-11 | 矽力杰半導體技術（杭州）有限公司 | Driving circuit and radio energy transmitting end using the same |
| US10381938B2 (en)* | 2016-05-13 | 2019-08-13 | Huawei Technologies Co., Ltd. | Resonant DC-DC converter |
| US20180198373A1 (en)* | 2016-07-07 | 2018-07-12 | Huawei Technologies Co., Ltd. | Four-switch three phase dc-dc resonant converter |
| US10715050B2 (en)* | 2016-07-07 | 2020-07-14 | Huawei Technologies Co., Ltd. | Four-switch three phase DC-DC resonant converter |
| US20180183351A1 (en)* | 2016-12-27 | 2018-06-28 | Fuji Electric Co., Ltd. | Power supply and simplification of structure of power supply |
| US10931206B2 (en)* | 2016-12-27 | 2021-02-23 | Fuji Electric Co., Ltd. | Power supply for output of various specifications |
| US11404966B2 (en)* | 2020-07-02 | 2022-08-02 | Delta Electronics, Inc. | Isolated multi-phase DC/DC converter with reduced quantity of blocking capacitors |
| US20220006390A1 (en)* | 2020-07-02 | 2022-01-06 | Delta Electronics, Inc. | Isolated multi-phase dc/dc converter with reduced quantity of blocking capacitors |
| US20220360185A1 (en)* | 2020-07-02 | 2022-11-10 | Delta Electronics, Inc. | Isolated multi-phase dc/dc converter with reduced quantity of blocking capacitors |
| US11929683B2 (en)* | 2020-07-02 | 2024-03-12 | Delta Electronics, Inc. | Isolated multi-phase DC/DC converter with reduced quantity of blocking capacitors |
| US20230009358A1 (en)* | 2021-07-06 | 2023-01-12 | Lite-On Electronics (Guangzhou) Limited | Three-phase interleaved resonant converter and power circuit |
| US11894766B2 (en)* | 2021-07-06 | 2024-02-06 | Lite-On Electronics (Guangzhou) Limited | Three-phase interleaved resonant converter and power circuit |
| US20240348170A1 (en)* | 2021-12-03 | 2024-10-17 | Ace Power And Technology Co., Ltd | Direct current to direct current (dcdc) converter and control method |
| US20250132686A1 (en)* | 2023-10-20 | 2025-04-24 | Infineon Technologies Austria Ag | Multi-Phase Resonant Power Converter |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2517346A2 (en) | 2012-10-31 |
| WO2011074976A3 (en) | 2012-03-08 |
| WO2011074977A3 (en) | 2012-03-15 |
| AU2010330953A1 (en) | 2012-08-09 |
| GB0922081D0 (en) | 2010-02-03 |
| US20130201725A1 (en) | 2013-08-08 |
| WO2011074977A2 (en) | 2011-06-23 |
| WO2011074976A2 (en) | 2011-06-23 |
| CN103004074A (en) | 2013-03-27 |
| EP2517346B1 (en) | 2016-04-13 |
| IN2012DN05064A (en) | 2015-10-09 |
| CA2783800A1 (en) | 2011-06-23 |
| AU2010330952A1 (en) | 2012-08-09 |
| CN102812628A (en) | 2012-12-05 |
| CA2783557A1 (en) | 2011-06-23 |
| EP2514086A2 (en) | 2012-10-24 |
| US9240723B2 (en) | 2016-01-19 |
| AU2010330953A2 (en) | 2013-11-28 |
| CN102812628B (en) | 2015-06-03 |
| CN103004074B (en) | 2015-05-27 |
| GB2476278A (en) | 2011-06-22 |
| IN2012DN05063A (en) | 2015-10-09 |
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