CN107086763A - Bimodulus Switching Power Supply - Google Patents

Abstract

The invention discloses a kind of bimodulus Switching Power Supply, including main power network, electromagnetic interface filter, rectifier bridge, the output of the main power network is connected through electromagnetic interface filter with rectifier bridge, it is characterised in that：Also include power factor correction module, MCU module, energy-storage battery, the first DC/DC modules, the 2nd DC/DC modules, the output end of the rectifier bridge and the input of power factor correction module are connected, and the output end of the power factor correction module is connected through the first DC/DC modules to be loaded；The MCU module obtains electric current, the voltage value of the first DC/DC module output ends by Current Voltage acquisition module；The MUC modules output control signals to output signal of the first DC/DC modules to control to adjust the first DC/DC modules；The energy-storage battery output end is connected through the 2nd DC/DC modules and loaded, and the MCU module output control signal adjusts the output of the 2nd DC/DC modules.The present invention's is simple in construction, possesses the advantage of low cost high powered output, and can provide continuation in the case where bulk power grid powers off for load and provide electric energy.

Description

Bimodulus Switching Power Supply

Technical field

The invention belongs to electric and electronic technical field, more particularly to a kind of bimodulus Switching Power Supply.

Background technology

At present, with the development of Power Electronic Technique, huge attention is obtained as the power circuit of electronic equipment heart,Especially there is the Switching Power Supply of efficient energy-efficient performance.Switching Power Supply is generally by input rectifying wave filter, power switch pipe, defeatedGo out rectifier filter and the part of controller 4 composition, its effect is that input ac voltage is converted into VD.Switch electricitySource is the requirement for meeting modern electronic equipment development, is mainly opened to intellectuality, high frequency, miniaturization, especially small-powerThe miniaturization in powered-down source.The product designed in the prior art is according to power output, main circuit switch device or perception memberCost also will be because of power rise, into the rising of geometry number in the selection of part.Simultaneously for general Switching Power Supply, in main power networkThe power supply of load can not be continued to when not electric, causes necessary device powers down to cause damage.

The content of the invention

It is contemplated that at least solving one of technical problem present in prior art.Therefore, the present invention provides a kind of doubleMould Switching Power Supply, it is therefore an objective to had concurrently while reducing Switching Power Supply cost and provide compensation to the power output deficiency of main power network, andAnd main power network can be monitored, remained to after main grid cut-off to load supplying.

To achieve these goals, the technical scheme taken of the present invention is：A kind of bimodulus Switching Power Supply, including main power network,Electromagnetic interface filter, rectifier bridge, the output of the main power network are connected through electromagnetic interface filter with rectifier bridge, it is characterised in that：Also include work(Rate factor correction module, MCU module, energy-storage battery, the first DC/DC modules, the 2nd DC/DC modules, the output of the rectifier bridgeEnd is connected with the input of power factor correction module, and the output end of the power factor correction module is through the first DC/DC modulesConnection load；The MCU module obtains electric current, the voltage number of the first DC/DC module output ends by Current Voltage Acquisition CircuitValue；The MUC modules output control signals to output signal of the first DC/DC modules to control to adjust the first DC/DC modules；The energy-storage battery output end is connected through the 2nd DC/DC modules and loaded, and the MCU module output control signal adjusts the 2nd DC/The output of DC modules.

MCU module gathers the voltage data of main power network, the AC voltage sampling module by AC voltage sampling moduleOutput end connects MCU module.

PWM is equipped between described MCU module and the first DC/DC modules, between MCU module and the 2nd DC/DC modulesGenerative circuit, the PWM ripples that the PWM generative circuits are produced to control the defeated of the first DC/DC modules and the 2nd DC/DC modules respectivelyGo out voltage.

Filter circuit is set between the output end of the first DC/DC modules and load.

Fuse is set between the 2nd DC/DC modules and load.

Described MCU module connection alarm module, MCU module judges whether main power network powers off according to main voltage dataAnd alarm signal is sent after a loss of power.

The EMI filter circuit include electric capacity C140, C146, C142, common mode inductance L15, electric capacity C150, electric capacity C151,Electric capacity C139, main power network output signal connects to form common-mode interference suppression circuit, differential mode through electric capacity C140 and electric capacity C146 successivelySuppress the common mode disturbances suppression that electric capacity C142, common mode inductance L15, differential mode suppress electric capacity C142, electric capacity C139 and electric capacity C151 compositionsExported after circuit processed.

The power factor correction module includes switching tube Q17, fly-wheel diode VD2, control chip, the control chipUsing NPC1654, two output end shunt capacitance C144, electric capacity C144 one end of rectifier bridge connect Q17 source electrode, electric capacity C144The other end by inductance connection Q17 drain electrode, Q17 grid connects the DRV pin of control chip, Q17 source ground, Q17Drain electrode be connected with diode VD2 anode, diode VD2 negative electrode connects electric capacity C145 one end and diode VD1 respectivelyNegative electrode, electric capacity C145 other end ground connection, diode VD1 anode is connected between electric capacity C144 and inductance L14；In electric capacityDistinguish shunt capacitance C147, electric capacity C143, electric capacity C149, electric capacity C141 and electric capacity C148 successively in C145 two ends；Control chipVCC ends input+12V power supplys, the BO pin and CS pin of control chip connect two output ends of rectifier bridge respectively, control chipFB pin are connected to diode VD2 anode through resistance R140 and resistance R137 successively.

The present invention's is simple in construction, possesses the advantage of low cost high powered output, and situation about can be powered off in bulk power gridUnder, provide continuation for load and electric energy is provided, reduce and lost caused by bulk power grid power-off, it is ensured that the reliable power supply of load.

Brief description of the drawings

This specification includes the following drawings, and shown content is respectively：

Fig. 1 is the structure principle chart of bimodulus Switching Power Supply of the present invention；

Fig. 2 is EMI circuit theory diagrams；

Fig. 3 is power factor correction module schematic diagram.

Embodiment

Below against accompanying drawing, by the description to embodiment, the embodiment to the present invention makees further details ofExplanation, it is therefore an objective to help those skilled in the art to have more complete, accurate and deep reason to design of the invention, technical schemeSolution, and contribute to it to implement.

As shown in figure 1, a kind of bimodulus Switching Power Supply, it is used to ensure that continuing as load after bulk power grid is powered off provides electricityCan, or passing through the 2nd DC/DC module for compensating bulk power grid power outputs.Concrete scheme is：Including main power network, electromagnetic interface filter,Power factor correction module, MCU module, energy-storage battery, the first DC/DC modules, the 2nd DC/DC modules and load, main power networkOutput end connects the input of electromagnetic interface filter, and the output end of electromagnetic interface filter is connected with rectifier bridge, the output end and work(of rectifier bridgeThe input connection of rate factor correction module, the output end of power factor correction module is connected through the first DC/DC modules to be loaded,MCU module obtains the output current voltage data of the first DC/DC modules by Current Voltage acquisition module；MCU module output controlSignal processed is to output voltage of the first DC/DC modules to control to adjust the first DC/DC modules；Energy-storage battery output end is through secondThe connection load of DC/DC modules, the output voltage of the output control signal of MCU module to adjust the 2nd DC/DC modules.In main electricityDuring net normal power supply, the first DC/DC modules output voltage is controlled extremely according to the demand MCU module output control signal of load-side,To provide operating voltage for load.Voltage x current acquisition module to gather the first DC/DC module voltage current power data, andRegulation is input to the control signal of the first DC/DC modules with the electric signal for the power for controlling the first defeated setting of DC/DC modules.Main electricityNet output services are not enough and by that can not meet the power demand of load after the conciliation of the first DC/DC modules, can not reach powerIn the case of demand, by controlling the output of energy-storage battery, the 2nd DC/DC modules to compensate the output of the first DC/DC modules；

MCU module gathers the voltage data of main power network, the output of AC voltage sampling module by AC voltage sampling moduleEnd connection MCU module.In main grid cut-off, MUC modules are changed into 0 according to the voltage data of collection, now, MCU output controlsSignal to the 2nd DC/DC modules, the 2nd DC/DC output voltages of regulation is powered by battery through the 2nd DC/DC modules, it is ensured thatThe normal power supply of load.

PWM generations are equipped between MCU module and the first DC/DC modules, between MCU module and the 2nd DC/DC modulesCircuit, the PWM ripples that the PWM generative circuits are produced to control the output electricity of the first DC/DC modules and the 2nd DC/DC modules respectivelyPressure.The control signal of MCU outputs controls the pwm signal dutycycle of PWM generative circuits, so as to adjust the electricity of DC/DC modules outputPressure.

Fuse is set in the outlet side of the 2nd DC/DC modules, the outlet side of circuit connects fuse, to protect userSide, load is damaged caused by preventing overcurrent.Filter circuit is set in the first DC/DC modules outlet side, filter circuit is by electricityHold the CLC π type filter circuits of inductance composition, be used for filtering interference signals in outlet side.Simultaneously can be in the first DC/DC modulesInput sets filter capacitor, and the effect of voltage stabilizing can be reached while filtering.

Simultaneously when bulk power grid is powered off, in order to remind user in time, MCU module is connected with alarm module, for receivingTo after main grid cut-off signal, alert reminds user to preserve data, or perform corresponding measure in time.

The input of electromagnetic interface filter is connected with the output end of main power network, the output end of electromagnetic interface filter and the output of rectifier bridgeEnd connection.Electromagnetic interface filter be used for filter out High-frequency Interference, its physical circuit as shown in Fig. 2 EMI filter circuit include electric capacity C140,C146, C142, common mode inductance L15, electric capacity C150, electric capacity C151, electric capacity C139, main power network output signal is successively through electric capacity C140Connect to form common-mode interference suppression circuit, differential mode suppression electric capacity C142, common mode inductance L15, differential mode suppression electric capacity with electric capacity C146Exported after the common-mode interference suppression circuit of C142, electric capacity C139 and electric capacity C151 compositions.Simultaneously in electric capacity C139 and electric capacity C151Indirectly.Output end is drawn in C139 one end, the C139 other end connects C151 one end, and the C151 other end draws outputTerminal, two lead-out terminals are connected on two inputs of rectifier bridge.Rectifier bridge is that Schottky diode constitutes bridge-typeRectification circuit.The rectified half-waves of output are exported to power factor correction module, to improve suppression harmonic wave.

The circuit diagram of power factor correction module is illustrated in figure 3, power factor correction module includes switching tube Q17, continuedDiode VD2, control chip are flowed, the control chip uses NPC1654, two output end shunt capacitance C144 of rectifier bridge,Electric capacity C144 one end connects Q17 source electrode, and the electric capacity C144 other end passes through inductance connection Q17 drain electrode, Q17 grid connectionThe DRV pin of control chip, Q17 source ground, Q17 drain electrode is connected with diode VD2 anode, diode VD2 negative electrodeElectric capacity C145 one end and diode VD1 negative electrode, electric capacity C145 other end ground connection, diode VD1 anode are connected respectivelyIt is connected between electric capacity C144 and inductance L14, VD1 protection inductance has consumption loop in instantaneous backward voltage, without going damageHardware；Distinguish shunt capacitance C147, electric capacity C143, electric capacity C149, electric capacity C141 and electric capacity successively at electric capacity C145 two endsC148, the output end of power factor correction module is drawn by electric capacity C148 two ends；The VCC ends input+12V power supplys of control chip,The BO pin and CS pin of control chip connect two output ends of rectifier bridge respectively, the FB pin of control chip successively through resistance R140 andResistance R137 is connected to diode VD2 anode.The GND pin ground connection of control chip, the VM pin of control chip pass through resistance eutral grounding.The VCON pin of control chip are grounded through resistance R144 and electric capacity C155 successively, and electric capacity C158 is attempted by resistance R144 and electric capacity C155The series circuit two ends of composition.

The present invention is exemplarily described above in association with accompanying drawing.Obviously, the present invention is implemented not by above-mentioned sideThe limitation of formula.As long as employ the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress；Or notIt is improved, the above-mentioned design of the present invention and technical scheme are directly applied into other occasions, in protection scope of the present inventionWithin.

Claims (8)

1. bimodulus Switching Power Supply, including main power network, electromagnetic interface filter, rectifier bridge, the output of the main power network through electromagnetic interface filter withRectifier bridge is connected, it is characterised in that：Also include power factor correction module, MCU module, energy-storage battery, the first DC/DC modules,2nd DC/DC modules, the output end of the rectifier bridge and the input of power factor correction module are connected, the power factor (PF) schoolThe output end of positive module is connected through the first DC/DC modules to be loaded；The MCU module obtains first by Current Voltage acquisition moduleElectric current, the voltage value of DC/DC module output ends；The MUC modules output control signals to the first DC/DC modules to controlAdjust the output signal of the first DC/DC modules；The energy-storage battery output end is connected through the 2nd DC/DC modules and loaded, the MCUModule output control signal adjusts the output of the 2nd DC/DC modules.

2. bimodulus Switching Power Supply as claimed in claim 1, it is characterised in that：MCU module is adopted by AC voltage sampling moduleCollect the voltage data of main power network, the AC voltage sampling module output end connects MCU module.

3. bimodulus Switching Power Supply as claimed in claim 1, it is characterised in that：Described MCU module and the first DC/DC modules itBetween, be equipped with PWM generative circuits between MCU module and the 2nd DC/DC modules, the PWM ripples that the PWM generative circuits are produced with pointNot Kong Zhi the first DC/DC modules and the 2nd DC/DC modules output voltage.

4. bimodulus Switching Power Supply as claimed in claim 1, it is characterised in that：The output end of the first DC/DC modules is with bearingFilter circuit is set between load.

5. bimodulus Switching Power Supply as claimed in claim 1, it is characterised in that：Set between the 2nd DC/DC modules and loadHolding fuse.

6. bimodulus Switching Power Supply as claimed in claim 2, it is characterised in that：Described MCU module connection alarm module, MCUModule judges whether main power network powers off and send alarm signal after a loss of power according to main voltage data.

7. bimodulus Switching Power Supply as claimed in claim 1, it is characterised in that：The EMI filter circuit include electric capacity C140,C146, C142, common mode inductance L15, electric capacity C150, electric capacity C151, electric capacity C139, main power network output signal is successively through electric capacity C140Connect to form common-mode interference suppression circuit, differential mode suppression electric capacity C142, common mode inductance L15, differential mode suppression electric capacity with electric capacity C146Exported after the common-mode interference suppression circuit of C142, electric capacity C139 and electric capacity C151 compositions.

8. bimodulus Switching Power Supply as claimed in claim 1, it is characterised in that：The power factor correction module includes switching tubeQ17, fly-wheel diode VD2, control chip, the control chip use NPC1654, two output end shunt capacitances of rectifier bridgeC144, electric capacity C144 one end connect Q17 source electrode, and the electric capacity C144 other end passes through inductance connection Q17 drain electrode, Q17 gridPole connects the DRV pin of control chip, and Q17 source ground, Q17 drain electrode is connected with diode VD2 anode, diode VD2Negative electrode connect electric capacity C145 one end and diode VD1 negative electrode respectively, electric capacity C145 other end ground connection, diode VD1Anode be connected between electric capacity C144 and inductance L14；Distinguish shunt capacitance C147, electric capacity successively at electric capacity C145 two endsC143, electric capacity C149, electric capacity C141 and electric capacity C148；The VCC ends input+12V power supplys of control chip, the BO pin of control chip andCS pin connect two output ends of rectifier bridge respectively, and the FB pin of control chip are connected to two through resistance R140 and resistance R137 successivelyPole pipe VD2 anode.