CN114050716A - A three-phase high-voltage charging module topology circuit - Google Patents
A three-phase high-voltage charging module topology circuitDownload PDFInfo
- Publication number
- CN114050716A CN114050716ACN202111364349.XACN202111364349ACN114050716ACN 114050716 ACN114050716 ACN 114050716ACN 202111364349 ACN202111364349 ACN 202111364349ACN 114050716 ACN114050716 ACN 114050716A
- Authority
- CN
- China
- Prior art keywords
- phase
- circuit
- topology
- inductor
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
- 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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention relates to the technical field of charging control, in particular to a topological circuit of a three-phase high-voltage charging module.
Background
Along with new forms of energy electric automobile's rapid development, battery charging outfit receives more and more attention as electric automobile industry's infrastructure, also is higher and higher to battery charging outfit's requirement, as the module topology circuit that charges of the most important part in the battery charging outfit, not only provides energy electric power, can also control, change and protect battery charging outfit, guarantees battery charging outfit's stability and reliability.
At present, most of the existing charging modules adopt a bridgeless PFC or BOOST-PFC topological circuit structure of a traditional communication power supply and an electric power operation power supply, wherein an isolated bridge type phase-shifting converter circuit topology is adopted by a DC-DC converter, the charging modules have the defects of large loss, narrow output voltage range, unstable output voltage, poor reliability and higher cost.
Disclosure of Invention
In order to solve the problems of the charging module, the invention provides a circuit structure of a three-phase charging module, which has the advantages of high reliability, high output voltage, wide output voltage range, low loss and low cost.
The technical scheme of the invention is realized as follows:
the invention discloses a three-phase high-voltage charging module topological circuit, which comprises a three-phase input three-level circuit topology, a DC-DC converter circuit topology, a detection feedback circuit and a safety protection circuit topology which are sequentially connected, wherein the three-phase input three-level circuit topology consists of an A-phase circuit, a B-phase circuit and a C-phase circuit, one input ends of the A-phase circuit, the B-phase circuit and the C-phase circuit are respectively connected with three-phase alternating-current power supply three-phase lines, the other input ends of the A-phase circuit, the B-phase circuit and the C-phase circuit are connected to form a common end GND, the DC-DC converter circuit topology comprises a first inductor BKL1, a second inductor BKL2 and a third inductor BKL3, one end of the first inductor BKL1 is connected with an S pole of a first switch tube QS3 and a common end of one end of a first capacitor C12, and the other end of the first inductor BKL1 is connected with a D pole of a second switch tube QS4 and a common end of a second capacitor C16; the D pole of the first switch tube QS3 is connected with the anode of the first electrolytic capacitor E4 and the common end of the positive voltage output end of the three-phase input three-level circuit topology, the S pole of the second switch tube QS4 is connected with the cathode of the second electrolytic capacitor E5 and the common end of the negative voltage output end of the three-phase input three-level circuit topology, and the cathode of the first electrolytic capacitor E4 is connected with the anode of the second electrolytic capacitor E5 and then is connected with the common end GND; the other end of the first capacitor C12 is connected with the cathode of the first freewheeling diode DS3 and the common end of one end of the second inductor BKL2, and the other end of the second inductor BKL2 is connected with apin 5 of the detection feedback circuit; the other end of the second capacitor C16 is connected with the anode of the second freewheeling diode DS4 and the common end of one end of a third inductor BKL3, the other end of the third inductor BKL3 is connected with the cathode of a third electrolytic capacitor E10, and the anode of the third electrolytic capacitor E10 is connected with apin 4 of the detection feedback circuit; the common terminal of the anode of the first freewheeling diode DS3 and the cathode of the second freewheeling diode DS4 is connected to the common terminal GND.
Further, the three-phase high-voltage charging module topology circuit further comprises a fuse protection circuit, wherein the fuse protection circuit comprises a first fuse FS4 and a second fuse FS3, and the first fuse FS4 is connected in series between the D pole of the first switch tube QS3 and the positive voltage output end of the three-phase input three-level circuit topology; the second fuse FS3 is connected in series between the S-pole of the second switch tube QS4 and the negative voltage output terminal of the three-phase input three-level circuit topology.
Furthermore, the circuit structures of the A-phase circuit, the B-phase circuit and the C-phase circuit of the three-phase input three-level circuit topology are the same.
Further, the a-phase circuit includes: a bidirectional switch composed of a first rectifier bridge D14 and a MOS transistor Q7, wherein apin 2 of the first rectifier bridge D14 is connected with a common end of a first phase line A of a three-phase alternating current power supply and one end of a third capacitor C13 through a fourth inductor LC2, the other end of the third capacitor C13 is connected with a GND end of the three-phase alternating current power supply, a pin 1 of a first rectifier bridge D14 is connected with a D electrode of the MOS transistor Q7 and a common end of an anode of a first diode D1, and a cathode of a first diode D1 is connected with a common end of an anode of a fourth electrolytic capacitor E6 and a positive voltage output end; apin 4 of the first rectifier bridge D14 is connected with the common terminal of the S pole of the MOS transistor Q7 and the cathode of the second diode D16, the anode of the second diode D16 is connected with the common terminal of the cathode of the fifth electrolytic capacitor E7 and the negative voltage output terminal, and the cathode of the fourth electrolytic capacitor E6 is connected with the anode of the fifth electrolytic capacitor E7 and then connected with the GND terminal of the three-phase ac power supply.
Further, the safety protection circuit topology comprises a second rectifier bridge DB2,pin 2 andpin 3 of the second rectifier bridge DB2 are connected to a first output terminal of the DC-DC converter circuit topology, pin 1 of the second rectifier bridge DB2 is connected to an OUT + terminal of the charging output circuit, and the OUT-terminal of the charging output circuit is connected to a second output terminal of the DC-DC converter circuit topology.
Further, the second rectifier bridge DB2 is used for preventing the battery current from flowing backward.
Further, the range of the output direct current voltage of the first output end and the second output end of the DC-DC converter circuit topology is 50-1200V.
Further, the first inductor BKL1 is an energy storage inductor, and the second inductor BKL2 and the third inductor BKL3 are filter inductors.
Furthermore, the phase difference between the first switch tube QS3 and the second switch tube QS4 is 180 degrees, and the first switch tube QS3 and the second switch tube QS4 are conducted in a staggered manner.
Further, the detection feedback circuit is a hall current sensor HR2 for current detection and feedback.
The circuit structure of the three-phase charging module has the following beneficial technical effects:
the three-phase high-voltage charging module topological circuit adopts APFC and DC-DC converter circuit topologies to convert alternating current voltage into adjustable direct current voltage, has the advantages of simple circuit structure, high voltage output, wide voltage regulation range, small loss, multiple circuit protection, high reliability, long service life and low cost, and is favorable for market popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a functional block diagram of a circuit configuration of a three-phase charging module of the present invention;
fig. 2 is a partial circuit structure diagram of the circuit structure of the three-phase charging module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a three-phase high-voltage charging module topology circuit, including a three-phase input three-level APFC circuit topology 10, a DC-DCconverter circuit topology 20, adetection feedback circuit 30 and a safetyprotection circuit topology 40, which are connected in sequence, where the three-phase input three-level circuit topology 10 is composed of an a-phasecircuit 101, a B-phase circuit 102 and a C-phase circuit 103, one input ends of the a-phasecircuit 101, the B-phase circuit 102 and the C-phase circuit 103 are respectively connected to three-phase alternating-current power three-phase lines, the three-phase lines are A, B, C phase lines, and the other input end thereof is connected to form a common terminal GND, and since a vector Ua + Ub + Uc is 0, the zero line is omitted.
The DC-DCconverter circuit topology 20 includes a first inductor BKL1, a second inductor BKL2, and a third inductor BKL3, where one end of the first inductor BKL1 is connected to the S-pole of the first switch tube QS3 and the common end of one end of the first capacitor C12, and the other end of the first inductor BKL1 is connected to the D-pole of the second switch tube QS4 and the common end of one end of the second capacitor C16; the D pole of the first switch tube QS3 is connected with the anode of the first electrolytic capacitor E4 and the common end of the positive voltage output end (+400V end) of the three-phase input three-level circuit topology 10, the S pole of the second switch tube QS4 is connected with the cathode of the second electrolytic capacitor E5 and the common end of the negative voltage output end (-400V end) of the three-phase input three-level circuit topology 10, and the cathode of the first electrolytic capacitor E4 is connected with the anode of the second electrolytic capacitor E5 and then is connected with the common end GND; the other end of the first capacitor C12 is connected with the cathode of the first freewheeling diode DS3 and the common end of one end of the second inductor BKL2, and the other end of the second inductor BKL2 is connected with thepin 5 of thedetection feedback circuit 30; the other end of the second capacitor C16 is connected to the anode of the second freewheeling diode DS4 and the common end of one end of the third inductor BKL3, the other end of the third inductor BKL3 is connected to the cathode of the third electrolytic capacitor E10, and the anode of the third electrolytic capacitor E10 is connected to thepin 4 of thedetection feedback circuit 30; the common terminal of the anode of the first freewheeling diode DS3 and the cathode of the second freewheeling diode DS4 is connected to the common terminal GND.
Preferably, the three-phase high-voltage charging module topology circuit further comprises afuse protection circuit 50, wherein thefuse protection circuit 50 comprises a first fuse FS4 and a second fuse FS3, and the first fuse FS4 is connected in series between the D pole of the first switch tube QS3 and the positive voltage output terminal (+400V terminal) of the three-phase input three-level circuit topology 10; the second fuse FS3 is connected in series between the S-pole of the second switch tube QS4 and the negative voltage output terminal (-400V terminal) of the three-phase input three-level circuit topology 10.
The circuit structures of the a-phasecircuit 101, the B-phase circuit 102 and the C-phase circuit 103 of the three-phase input three-level circuit topology 10 are the same.
The a-phasecircuit 101 includes: a bidirectional switch composed of a first rectifier bridge D14 and a MOS transistor Q7, wherein apin 2 of the first rectifier bridge D14 is connected with a common end of a first phase line A of a three-phase alternating current power supply and one end of a third capacitor C13 through a fourth inductor LC2, the other end of the third capacitor C13 is connected with a GND end of the three-phase alternating current power supply, a pin 1 of a first rectifier bridge D14 is connected with a D electrode of the MOS transistor Q7 and a common end of an anode of a first diode D1, and a cathode of a first diode D1 is connected with a common end of an anode of a fourth electrolytic capacitor E6 and a positive voltage output end; apin 4 of the first rectifier bridge D14 is connected with the common terminal of the S pole of the MOS transistor Q7 and the cathode of the second diode D16, the anode of the second diode D16 is connected with the common terminal of the cathode of the fifth electrolytic capacitor E7 and the negative voltage output terminal, and the cathode of the fourth electrolytic capacitor E6 is connected with the anode of the fifth electrolytic capacitor E7 and then connected with the GND terminal of the three-phase ac power supply.
The APFC circuit is an Active Power Factor Correction (APFC) technology, and has the advantages of improving the Power Factor of the network side of a Power electronic device, reducing the line loss, saving energy, reducing the harmonic pollution of a Power grid, improving the Power supply quality of the Power grid and the like, so that the APFC circuit is widely applied to many industries.
The three-phase utility power vector Ua + Ub + Uc is 0, so that: three groups of circuits, namely anA-phase circuit 101, a B-phase circuit 102 and a C-phase circuit 103, which have the same circuit structure, form a complete three-level three-phase three-wire system PFC circuit, and the three-phase three-wire system PFC circuit is combined. D14 and Q7 form a bidirectional switch; d1 positive bus fast recovery diode, D16 negative bus fast recovery diode; the fourth inductor LC2 is a PFC energy storage inductor.
The components LC2, D14, Q7, D1, D16, E6 and E7 in theA-phase circuit 101 form a complete one-phase APFC circuit. Three output ends of three groups of circuits (A, B and C three phases) with the same structure, namely +400V and-400V, GND-AUX, are connected and combined into a complete three-phase three-level APFC circuit.
The safetyprotection circuit topology 40 comprises a second rectifier bridge DB2, wherein apin 2 and apin 3 of the second rectifier bridge DB2 are connected and then connected with a first output end of the DC-DC converter circuit topology, a pin 1 of the second rectifier bridge DB2 is connected with an OUT + end of a charging output circuit, and the OUT-end of the charging output circuit is connected with a second output end of the DC-DC converter circuit topology.
Preferably, the second rectifier bridge DB2 is used to reverse the battery current.
Preferably, the output DC voltage range of the first output terminal and the second output terminal of the DC-DCconverter circuit topology 20 is 50-1200V.
Further, the first inductor BKL1 is an energy storage inductor, and the second inductor BKL2 and the third inductor BKL3 are filter inductors.
Further, the first switch tube QS3 and the second switch tube QS4 are 180 degrees out of phase and are turned on alternately.
Thedetection feedback circuit 30 is a hall current sensor HR2, and is used for detecting and feeding back the output direct current of the DC-DCconverter circuit topology 20 to the control circuit, and the control circuit processes the control signal with the output current.
Further explanation is as follows:
in the circuit structure of the three-phase charging module, a three-phase input three-level circuit topology A-phase circuit inputs alternating current 220VAC and outputs direct current +/-400 VDC, and a B-C two-phase circuit structure is completely the same as the A-phase circuit, and respective outputs are connected together and are connected with GND _ AUX to form a complete three-phase three-wire system APFC circuit.
The BKL2 (the second inductor BKL2) and the BKL3 (the third inductor BKL3) of the DC-DC converter circuit topology are output filter inductors, which may be two or one, and the BKL1 (the first inductor BKL1) is an energy storage inductor. The first switch tube QS3 and the second switch tube QS4 are power switch tubes; the first freewheel diode DS3 and the second freewheel diode DS4 are freewheel diodes; c12 (first capacitor C12) and C16 the second capacitor C16 is a DC blocking capacitor; e10 (third electrolytic capacitor E10) is an output filter capacitor; e4 (first electrolytic capacitor E4) and E5 (second electrolytic capacitor E5) are input filter capacitors. HR2 is a hall current sensor. The QS3 (first switch tube QS3) and QS4 (second switch tube QS4) are switched on and off alternately under the control of the control circuit, the phase difference is 180 degrees, and the duty ratio can reach 0-98%.
Each device stress in the DC-DC converter circuit topology is small, an inductor and a capacitor are half smaller than that of a two-level converter, the output voltage U0 is D UIN/(1-D), the output voltage range is wide, the output voltage can be higher than the input voltage, the future high-voltage and low-voltage charging requirements can be met, and the structure advantage is achieved.
The safety protection circuit topology is a fuse protection circuit consisting of a first fuse FS1 and a second fuse FS4, and is used for realizing overcurrent protection, overvoltage protection, short-circuit protection and damage protection.
The circuit structure of the three-phase charging module has the following beneficial technical effects:
1. the three-phase input three-level circuit topology composed of the A-phase circuit, the B-phase circuit and the C-phase circuit, the DC-DC converter circuit topology, the detection feedback circuit, the safety protection circuit topology and the fuse protection circuit are adopted, the circuit structure is simple, the three-phase circuit is balanced, the output voltage is high, the output voltage range is wide and adjustable, the efficiency of the charging equipment is improved, and the cost is reduced.
2. The invention adopts a safety protection circuit, a fuse circuit and a multiple protection structure, improves the charging reliability and reduces the failure rate of equipment.
3. The circuit structure of the three-phase charging module is different from the prior art in that an isolation topology is adopted, and the charging efficiency is higher and the loss is small because direct isolation is not adopted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
Translated fromChinesePriority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111364349.XACN114050716A (en) | 2021-11-17 | 2021-11-17 | A three-phase high-voltage charging module topology circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111364349.XACN114050716A (en) | 2021-11-17 | 2021-11-17 | A three-phase high-voltage charging module topology circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114050716Atrue CN114050716A (en) | 2022-02-15 |
Family
ID=80209939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111364349.XAPendingCN114050716A (en) | 2021-11-17 | 2021-11-17 | A three-phase high-voltage charging module topology circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114050716A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130271221A1 (en)* | 2010-04-20 | 2013-10-17 | Rf Micro Devices, Inc. | Direct current (dc)-dc converter having a multi-stage output filter |
| CN105871244A (en)* | 2016-05-06 | 2016-08-17 | 钛白金科技（深圳）有限公司 | Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit |
| CN106787859A (en)* | 2016-12-29 | 2017-05-31 | 哈尔滨工业大学 | Combined three-phase single-stage APFC converter and its control device based on full-bridge structure |
| CN106911175A (en)* | 2015-12-23 | 2017-06-30 | 天津中正科创科技发展有限公司 | A kind of quick-detachable DC charging system of tandem |
| WO2018129835A1 (en)* | 2017-01-16 | 2018-07-19 | 广东百事泰电子商务股份有限公司 | Vienna pfc-based smart half bridge sine wave voltage conversion circuit |
| CN210201714U (en)* | 2019-07-12 | 2020-03-27 | 江苏埃驱奥新能源科技有限公司 | Vehicle fuel cell DC/DC converter |
| CN211127583U (en)* | 2019-12-30 | 2020-07-28 | 武汉市整流器研究所 | Buck circuit |
- 2021
- 2021-11-17CNCN202111364349.XApatent/CN114050716A/enactivePending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130271221A1 (en)* | 2010-04-20 | 2013-10-17 | Rf Micro Devices, Inc. | Direct current (dc)-dc converter having a multi-stage output filter |
| CN106911175A (en)* | 2015-12-23 | 2017-06-30 | 天津中正科创科技发展有限公司 | A kind of quick-detachable DC charging system of tandem |
| CN105871244A (en)* | 2016-05-06 | 2016-08-17 | 钛白金科技（深圳）有限公司 | Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit |
| CN106787859A (en)* | 2016-12-29 | 2017-05-31 | 哈尔滨工业大学 | Combined three-phase single-stage APFC converter and its control device based on full-bridge structure |
| WO2018129835A1 (en)* | 2017-01-16 | 2018-07-19 | 广东百事泰电子商务股份有限公司 | Vienna pfc-based smart half bridge sine wave voltage conversion circuit |
| CN210201714U (en)* | 2019-07-12 | 2020-03-27 | 江苏埃驱奥新能源科技有限公司 | Vehicle fuel cell DC/DC converter |
| CN211127583U (en)* | 2019-12-30 | 2020-07-28 | 武汉市整流器研究所 | Buck circuit |
Non-Patent Citations (2)
| Title |
|---|
| 贲洪奇: "《现代高频开关电源技术与应用》", 31 March 2018, 哈尔滨工业大学出版社, pages: 187 - 189* |
| 马骏杰: "《新能源电源变换技术》", 31 January 2021, 机械工业出版社, pages: 67* |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205847123U (en) | A three-phase T-type five-level inverter circuit | |
| CN112366962B (en) | Three-phase three-level rectifier based on three-winding isolation transformer | |
| CN102593910A (en) | Uninterruptible power supply | |
| CN110165921A (en) | One kind having the quasi- Z-source inverter of high output voltage gain switch inductive type | |
| CN111756257A (en) | Double-boost three-level rectifier based on three switching tubes | |
| CN105262361A (en) | Two-stage non-isolation photovoltaic grid-connected inverter and control method thereof | |
| CN106877716B (en) | A clamped three-phase non-isolated photovoltaic inverter with freewheeling switch | |
| CN205864282U (en) | Three-phase line voltage cascade VIENNA changer | |
| CN105226986B (en) | A kind of inverter and its control method for eliminating the pulsation of input side secondary power | |
| CN215817642U (en) | Auxiliary power supply system, power supply device and battery replacing cabinet | |
| CN106452153A (en) | Variable-topology Trans-Z-source inverter | |
| CN111865089A (en) | An isolated wide-gain quasi-switching boost DC-DC converter circuit | |
| CN209170243U (en) | A kind of modularization multi-level converter | |
| CN209072370U (en) | A kind of single phase bidirectional AC-DC charge-discharge circuit | |
| CN216356076U (en) | Circuit structure of three-phase charging module | |
| CN108390583B (en) | One kind ten switchs the non-isolated photovoltaic DC-to-AC converter topological structure of Clamp three-phase | |
| CN114050716A (en) | A three-phase high-voltage charging module topology circuit | |
| CN105429445A (en) | An AC-DC Microgrid Bidirectional Converter | |
| CN214256154U (en) | No-leakage current grid-connected inverter | |
| CN211959080U (en) | Buck three-phase four-wire three-level PFC rectifier system | |
| CN216751281U (en) | Topological circuit of three-phase charging module | |
| CN106921295A (en) | A kind of high-gain DC voltage changer for reducing switching tube current stress | |
| CN111355394A (en) | A series hybrid MMC topology suitable for flexible DC transmission | |
| CN112737316A (en) | quasi-Z-source inverter and power supply system | |
| CN112202346A (en) | Enhanced Z-source topological circuit based on improved current correction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication | Application publication date:20220215 |