An energy-harvesting circuit used in series with a voltage-equalizing resistor of a power module

Abstract

An energy-taking circuit used in series with a voltage-equalizing resistor of a power module, with the positive pole of the capacitor of the power unit as the voltage input terminal HVin, outputting two power supplies VOUT1 and VOUT2. It includes a voltage-equalizing resistor, a first fully-controlled switch device, a rectifier diode, a first voltage sampling circuit, a drive circuit, a start-up circuit, a start-up capacitor, an energy storage capacitor, a second voltage sampling circuit, a main control circuit, a power conversion circuit and a power supply diode. It is independent of the original energy-taking power supply on the power module. When the original energy-taking power supply fails, it can provide backup power supply for the bypass contactor trigger circuit of the power unit to ensure reliable execution of the contactor bypass action. After being connected in series with the voltage-equalizing resistor, it is connected to the power unit capacitor, which reduces the withstand voltage level of the fully-controlled device and the energy storage capacitor, and has high design convenience. The circuit principle is simple, the reliability is high, it has the function of dual power supply output of VOUT1 and VOUT2, and the application is flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and in particular to an energy harvesting circuit which is applied in series with a voltage-equalizing resistor of a power module. Background Art

[0002] The main circuit structures of the bridge arm of the MMC flexible DC transmission converter valve, the cascaded reactive power compensation device, the cascaded active filter device, the inverter unit of the cascaded high-voltage frequency conversion device, and the chopper unit of the cascaded DC power supply device are all composed of many power units connected in series. When a power module fails, it should be able to be reliably bypassed to ensure the continued operation of the equipment.

[0003] At present, the secondary board power supply of the power unit is traditionally powered by directly taking energy from the power unit capacitor. Due to the complex principle and large size of the energy source, the power unit generally adopts a single energy source design. When the energy source fails, the power unit cannot be controlled and the entire device needs to be powered off before manual bypass processing can be performed, which has a serious impact on the operation of the device. Summary of the invention

[0004] In order to solve the problems described in the background technology, the present invention provides an energy extraction circuit applied in series with the voltage-equalizing resistor of the power module, which is independent of the original energy extraction power supply on the power module. When the original energy extraction power supply fails, it can provide backup power supply for the bypass contactor trigger circuit of the power unit to ensure reliable execution of the contactor bypass action.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An energy-taking circuit used in series with a voltage-equalizing resistor of a power module, wherein the power module is a bridge-structured power unit of an MMC flexible DC transmission converter valve or a cascaded reactive power compensation device, a cascaded active filter device, a cascaded high-voltage frequency conversion device, or a cascaded DC power supply device.

[0007] The energy extraction circuit uses the positive electrode of the capacitor of the power unit as the voltage input terminal HVin and outputs two power supplies VOUT1 and VOUT2.

[0008] The energy extraction circuit includes a voltage-equalizing resistor, a first fully-controlled switch device, a rectifier diode, a first voltage sampling circuit, a drive circuit, a start-up circuit, a start-up capacitor, an energy storage capacitor, a second voltage sampling circuit, a main control circuit, a power conversion circuit and a power supply diode.

[0009] The voltage input terminal HVin is connected in series with a voltage equalizing resistor and a rectifier diode in sequence and then directly outputs the first power supply VOUT1.

[0010] The upper end of the first fully-controlled switch device is connected to the middle point of the series connection of the voltage-equalizing resistor and the rectifier diode, and the lower end is grounded.

[0011] The upper end of the energy storage capacitor is connected to the rear end of the rectifier diode, and the lower end is grounded.

[0012] The starting circuit and the starting capacitor are connected in series from top to bottom and then connected in parallel with the energy storage capacitor.

[0013] The middle point of the series connection between the start-up circuit and the start-up capacitor is the low-voltage power supply terminal VCC, which supplies power to the first voltage sampling circuit, the drive circuit, the second voltage sampling circuit and the main control circuit.

[0014] The input end of the first voltage sampling circuit is connected to the upper end of the energy storage capacitor, and the output end is connected to the driving circuit, which is connected to the control end of the first fully-controlled switch device through the driving circuit.

[0015] The input end of the second voltage sampling circuit is connected to the upper end of the energy storage capacitor, and the output end is connected to the main control circuit.

[0016] The input end of the main control circuit is connected to the second voltage sampling circuit, and the output end is connected to the control signal end of the start-up circuit and the power conversion circuit to control the start-up circuit and the power conversion circuit.

[0017] The primary side of the power conversion circuit is connected to the upper end of the energy storage capacitor, and the secondary side outputs the second power supply VOUT2.

[0018] The second power supply VOUT2 is also connected to the low voltage power supply terminal VCC via a power supply diode.

[0019] Furthermore, the starting circuit includes a second fully-controlled switch device, the control end of the second fully-controlled switch device is controlled by the output end of the main control circuit, the upper end of the second fully-controlled switch device is connected to the upper end of the energy storage capacitor, and the lower end is connected to the upper end of the starting capacitor.

[0020] Furthermore, the power conversion circuit includes a third fully-controlled switching device and a power transformer. The control end of the third fully-controlled switching device is controlled by the output end of the main control circuit. The upper end of the primary side of the power transformer is connected to the upper end of the energy storage capacitor, and the lower end is grounded after passing through the third fully-controlled switching device. The secondary side of the power transformer outputs a second power supply VOUT2.

[0021] Furthermore, the second fully-controlled switch device and the third fully-controlled switch device are one of MOS, IGBT or triode.

[0022] Furthermore, the first voltage sampling circuit includes a first voltage-dividing resistor and a first hysteresis comparator, the upper end of the first voltage-dividing resistor is connected to the upper end of the energy storage capacitor, the lower end is grounded, the voltage-dividing output end of the first voltage-dividing resistor is connected to the input end of the first hysteresis comparator, and the output end of the first hysteresis comparator is connected to the drive circuit.

[0023] Furthermore, the second voltage sampling circuit includes a second voltage-dividing resistor and a second hysteresis comparator, the upper end of the second voltage-dividing resistor is connected to the upper end of the energy storage capacitor, the lower end is grounded, the voltage-dividing output end of the second voltage-dividing resistor is connected to the input end of the second hysteresis comparator, and the output end of the second hysteresis comparator is connected to the main control circuit.

[0024] Furthermore, the main control circuit is a main control MCU, the power supply end of the main control MCU is connected to the low-voltage power supply end VCC, the input port is connected to the voltage sampling signal of the second voltage sampling circuit, and the output end outputs the start-up signal of the start-up circuit and the drive signal of the power conversion circuit.

[0025] Furthermore, the driving circuit is a triode amplifier circuit.

[0026] Furthermore, the first fully-controlled switch device is one of MOS, IGBT or triode.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1) The energy extraction circuit of the present invention, which is used in series with the voltage-equalizing resistor of the power module, is connected to the power unit capacitor after being connected in series with the voltage-equalizing resistor, thereby reducing the withstand voltage level of the full-control device and the energy storage capacitor, and the design convenience is high.

[0029] 2) The energy-harvesting circuit of the present invention, which is used in series with the voltage-equalizing resistor of the power module, has a simple circuit principle and high reliability.

[0030] 3) The energy-taking circuit of the present invention, which is used in series with the voltage-equalizing resistor of the power module, has the function of dual power supply output of VOUT1 and VOUT2 and is flexible in application.

[0031] 4) The energy harvesting circuit of the present invention, which is used in series with the voltage-equalizing resistor of the power module, adopts a first voltage sampling circuit and a second voltage sampling circuit to control the full-control switch device and the main control circuit respectively. The control parameters can be set separately, and the application is flexible.

[0032] 5) The energy-harvesting circuit of the present invention, which is used in series with the voltage-equalizing resistor of the power module, adopts a constant-current and controllable shutdown starting circuit to charge the starting capacitor, supply power to the first voltage sampling circuit, the driving circuit, the second voltage sampling circuit, the main control circuit, etc., and provide the energy required for initial operation. After the energy-harvesting circuit works normally, the starting circuit can be controlled to stop working, thereby reducing the loss of the energy-harvesting circuit and improving the working efficiency of the energy-harvesting circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a topological structure block diagram of an energy-taking circuit used in series with a voltage-sharing resistor of a power module according to the present invention;

[0034] Figure 2 It is an overall principle diagram of an energy-taking circuit of the present invention that is applied in series with a voltage-equalizing resistor of a power module;

[0035] Figure 3 It is a sample diagram of a bridge structure power unit in the prior art;

[0036] Figure 4 It is the schematic diagram of the starting circuit of the present invention;

[0037] Figure 5 It is a schematic diagram of a power conversion circuit of the present invention;

[0038] Figure 6 is a schematic diagram of a first voltage sampling circuit of the present invention;

[0039] Figure 7 is a schematic diagram of a second voltage sampling circuit of the present invention;

[0040] Figure 8 is a schematic diagram of a driving circuit of the present invention;

[0041] Fig. 9 It is the main control circuit principle diagram of the present invention.

[0042] In the figure: 1-piezoresistance 2-rectifier diode 3-first fully controlled switch device 4-starting circuit 5-driving circuit 6-first voltage sampling circuit 7-starting capacitor 8-energy storage capacitor 9-second voltage sampling circuit 10-main control circuit 11-power conversion circuit 12-power supply diode. DETAILED DESCRIPTION

[0043] The specific implementation modes provided by the present invention are described in detail below with reference to the accompanying drawings.

[0044] An energy-taking circuit used in series with a voltage-equalizing resistor of a power module, wherein the power module is a bridge-structured power unit of an MMC flexible DC transmission converter valve or a cascaded reactive power compensation device, a cascaded active filter device, a cascaded high-voltage frequency conversion device, or a cascaded DC power supply device.

[0045] like Figure 1-3 As shown, the energy extraction circuit uses the positive electrode of the capacitor of the power unit as the voltage input terminal HVin and outputs two power supplies VOUT1 and VOUT2. Figure 3 It is a full-bridge power unit structure of an MMC flexible DC transmission converter valve or a cascaded reactive power compensation device, a cascaded active filter device, a cascaded high-voltage frequency conversion device, or a cascaded DC power supply device, wherein the positive pole of the capacitor C is the voltage input terminal HVin.

[0046] like Figure 1-2As shown, the energy extraction circuit includes a voltage-equalizing resistor 1, a first fully-controlled switch device 3, a rectifier diode 2, a first voltage sampling circuit 6, a drive circuit 5, a start-up circuit 4, a start-up capacitor 7, an energy storage capacitor 8, a second voltage sampling circuit 9, a main control circuit 10, a power conversion circuit 11 and a power supply diode 12.

[0047] The voltage input terminal HVin is connected in series with a voltage equalizing resistor 1 and a rectifier diode 2 in sequence, and then directly outputs the first power supply VOUT1.

[0048] The upper end (source) of the first fully-controlled switch device 3 is connected to the middle point of the series connection of the voltage-equalizing resistor 1 and the rectifier diode 2, and the lower end (drain) is grounded GND.

[0049] The upper end of the energy storage capacitor 8 is connected to the rear end of the rectifier diode 2, and the lower end is grounded.

[0050] The starting circuit 4 and the starting capacitor 7 are connected in series from top to bottom and then connected in parallel with the energy storage capacitor 8.

[0051] The middle point of the series connection between the start-up circuit 4 and the start-up capacitor 7 is the low-voltage power supply terminal VCC, which supplies power to the first voltage sampling circuit 6 , the drive circuit 5 , the second voltage sampling circuit 9 and the main control circuit 10 .

[0052] The input end of the first voltage sampling circuit 6 is connected to the upper end of the energy storage capacitor 8 , and the output end is connected to the driving circuit 5 , and is connected to the control end (gate) of the first fully-controlled switch device 3 through the driving circuit 5 .

[0053] The input end of the second voltage sampling circuit 9 is connected to the upper end of the energy storage capacitor 8 , and the output end is connected to the main control circuit 10 .

[0054] The input end of the main control circuit 10 is connected to the second voltage sampling circuit 9 , and the output end is connected to the control signal end of the start-up circuit 4 and the power conversion circuit 11 to control the start-up circuit 4 and the power conversion circuit 11 .

[0055] The primary side of the power conversion circuit 11 is connected to the upper end of the energy storage capacitor 8, and the secondary side outputs the second power supply VOUT2.

[0056] The second power supply VOUT2 is also connected to the low voltage power supply terminal VCC via the power supply diode 12 .

[0057] The first fully-controlled switch device 3 is one of MOS, IGBT or triode.

[0058] In the energy extraction circuit: the equalizing resistor 2 bears most of the power unit capacitor voltage and charges the energy storage capacitor 8; the starting circuit 4 cooperates with the starting capacitor 7 to supply the necessary starting energy to the first voltage sampling circuit 6, the drive circuit 5, the second voltage sampling circuit 9 and the main control circuit 10; the first fully-controlled switching device 3 cooperates with the rectifier diode 2 and the drive circuit 5 to control the equalizing resistor 1 to short-circuit to the ground or charge the energy storage capacitor 8 to stabilize the voltage amplitude of the energy storage capacitor 8.

[0059] like Figure 2 , 4 As shown, the start-up circuit 4 includes a second fully controlled switch device Q13, the control end (gate) of the second fully controlled switch device Q13 is connected to the output end of the main control circuit 10 through an isolation device K11 (relay or optical coupler isolation), and the control end (gate) of the second fully controlled switch device Q13 is also connected in parallel with a voltage regulator tube D11 to prevent the gate voltage of the fully controlled device from exceeding the device tolerance value. There are also current limiting resistors R13 and R14. The upper end (source) of the second fully controlled switch device Q13 is connected to the upper end of the energy storage capacitor 8, and the lower end (drain) is connected to the upper end of the start-up capacitor 7.

[0060] like Figure 2 , 5 As shown, the power conversion circuit 11 includes a third fully-controlled switch device Q14 and a power transformer T11. The control end (gate) of the third fully-controlled switch device Q14 is controlled by the output end of the main control circuit 10. The upper end of the primary side of the power transformer T11 is connected to the upper end of the energy storage capacitor 8, and the lower end is grounded after passing through the third fully-controlled switch device Q14. The secondary side of the power transformer T11 outputs a second power supply VOUT2.

[0061] The second fully-controlled switch device Q13 and the third fully-controlled switch device Q14 are one of MOS, IGBT or triode.

[0062] like Figure 2 , 6 As shown, the first voltage sampling circuit 6 includes first voltage-dividing resistors R11, R12 and a first hysteresis comparator A1. The upper ends of the first voltage-dividing resistors R11, R12 are connected to the upper end of the energy storage capacitor 8, and the lower ends are grounded. The voltage-dividing output ends of the first voltage-dividing resistors R11, R12 are connected to the input ends of the first hysteresis comparator A1, and the output end of the first hysteresis comparator A1 is connected to the drive circuit 5.

[0063] like Figure 2 , 7As shown, the second voltage sampling circuit 9 includes second voltage-dividing resistors R15, R16 and a second hysteresis comparator. The upper ends of the second voltage-dividing resistors R15, R16 are connected to the upper end of the energy storage capacitor 8, and the lower ends are grounded. The voltage-dividing output ends of the second voltage-dividing resistors R15, R16 are connected to the input end of the second hysteresis comparator A2, and the output end of the second hysteresis comparator A2 is connected to the main control circuit 10.

[0064] like Figure 2 , 8 As shown, the driving circuit is a triode amplifier circuit. Figure 8 It is a conventional amplifier circuit formed by two transistors Q11 and Q12 connected in series.

[0065] The driving circuit may also be a driving chip for the third fully-controlled switch device Q14, and the driving chip is a MOS driving chip, an IGBT driving chip or a triode driving chip, and is selected according to the component type of the third fully-controlled switch device Q14.

[0066] like Figure 2 , 9 As shown, the main control circuit 10 is a main control MCU, the power supply end of the main control MCU is connected to the low voltage power supply end VCC, the input port is connected to the voltage sampling signal of the second voltage sampling circuit 9, and the output end outputs the start signal of the start circuit 4 and the drive signal of the power conversion circuit 11. The main control MCU can be a UCX845, UCX844 controller, or a chip such as STM32, CPLD, etc.

[0067] like Figure 1 , 2 As shown, the working process of the present invention is as follows:

[0068] 1) Before the energy extraction circuit is started, the drive circuit 5, the first voltage sampling circuit 6, the second voltage sampling circuit 9, and the main control circuit 10 have no power supply voltage, the drive circuit 5 has no output, and the first fully controlled switch device 3 is in a closed state;

[0069] 2) After the input voltage HVin of the energy extraction circuit is established, it is charged through the voltage-equalizing resistor 1, the rectifier diode 2 and the energy storage capacitor 8;

[0070] 3) After the charging voltage of the energy storage capacitor 8 rises to the set value, the start-up circuit 4 starts to work first, the gate of the second fully-controlled switch device Q13 of the start-up circuit 4 has a driving voltage, and a current flows through the start-up circuit current limiting resistors R13 and R14. The start-up circuit current limiting resistors R13 and R14 play a negative feedback role, so that the output current of the start-up circuit 4 is output according to the set value;

[0071] 4) The voltage of the starting capacitor 4 begins to build up, supplying power to the drive circuit 5, the first voltage sampling circuit 6, the second voltage sampling circuit 9, and the main control circuit 10;

[0072] 5) After the voltage of the energy storage capacitor 8 rises to the set value Ref2 of the second voltage sampling circuit 9, the main control circuit 10 drives the power conversion circuit 11 to start working;

[0073] 6) The output of the power conversion circuit 11 supplies power to the drive circuit 5, the first voltage sampling circuit 6, the second voltage sampling circuit 9, and the main control circuit 10 through the power supply diode 12, and the start-up circuit 4 is turned off through the main control circuit 10 to reduce the power consumption of the energy extraction circuit;

[0074] 7) The charging voltage of the energy storage capacitor 8 continues to increase. When it increases to the set voltage Ref1 of the first voltage sampling circuit 6, the first fully-controlled switch device 3 is controlled to be turned on through the driving circuit 5 to prevent the energy storage capacitor 8 from continuing to increase;

[0075] 8) The voltage of the energy storage capacitor 8 starts to drop during the conduction period of the first fully-controlled switch device 3;

[0076] 9) After the voltage of the energy storage capacitor 8 drops to the set voltage Ref1 of the first voltage sampling circuit 6, the first fully-controlled switch device 3 is turned off by the driving circuit 5, and the input is charged to the energy storage capacitor 8 through the voltage balancing resistor 1, and the charging voltage of the energy storage capacitor 8 starts to rise.

[0077] 10) The charging voltage of the energy storage capacitor 8 continues to increase. When it reaches the set voltage Ref1 of the first voltage sampling circuit 6, the driving circuit 5 controls the first fully-controlled switch device 3 to be turned on to prevent the energy storage capacitor 8 from continuing to increase, and the cycle is repeated.

[0078] Those skilled in the art should understand that what is shown above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred examples, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

[0079] The redundant trigger circuit including the state feedback function provided by the present invention is introduced in detail above. The principle and implementation mode of the present invention are explained by using specific examples in this article. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for the general technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An energy-taking circuit used in series with a voltage-sharing resistor of a power module, wherein the power module is a bridge-structured power unit of an MMC flexible DC power transmission converter valve or a cascaded reactive power compensation device, a cascaded active filter device, a cascaded high-voltage frequency conversion device, or a cascaded DC power supply device; It is characterized in that The energy extraction circuit uses the positive electrode of the capacitor of the power module as the voltage input terminal HVin and outputs two power supplies VOUT1 and VOUT2; The energy extraction circuit includes a voltage-equalizing resistor, a first fully-controlled switch device, a rectifier diode, a first voltage sampling circuit, a drive circuit, a start-up circuit, a start-up capacitor, an energy storage capacitor, a second voltage sampling circuit, a main control circuit, a power conversion circuit and a power supply diode; The voltage input terminal HVin is connected in series with a voltage-equalizing resistor and a rectifier diode in sequence to directly output the first power supply VOUT1; after being connected in series with the voltage-equalizing resistor, it is connected to the power unit capacitor to reduce the withstand voltage level of the fully controlled switch device and the energy storage capacitor; The upper end of the first fully controlled switch device is connected to the middle point of the series connection of the voltage balancing resistor and the rectifier diode, and the lower end is grounded; The upper end of the energy storage capacitor is connected to the rear end of the rectifier diode, and the lower end is grounded; The starting circuit is connected in series with the starting capacitor from top to bottom and then connected in parallel with the energy storage capacitor; The middle point of the series connection between the start-up circuit and the start-up capacitor is the low-voltage power supply terminal VCC, which supplies power to the first voltage sampling circuit, the drive circuit, the second voltage sampling circuit and the main control circuit; The input end of the first voltage sampling circuit is connected to the upper end of the energy storage capacitor, and the output end is connected to the drive circuit, which is connected to the control end of the first fully-controlled switch device through the drive circuit; The input end of the second voltage sampling circuit is connected to the upper end of the energy storage capacitor, and the output end is connected to the main control circuit; The input end of the main control circuit is connected to the second voltage sampling circuit, and the output end is connected to the control signal end of the start-up circuit and the power conversion circuit to control the start-up circuit and the power conversion circuit; The primary side of the power conversion circuit is connected to the upper end of the energy storage capacitor, and the secondary side outputs the second power supply VOUT2; The second power supply VOUT2 is also connected to the low voltage power supply terminal VCC via a power supply diode.

2. The energy-taking circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The starting circuit includes a second fully controlled switch device, the control end of the second fully controlled switch device is controlled by the output end of the main control circuit, the upper end of the second fully controlled switch device is connected to the upper end of the energy storage capacitor, and the lower end is connected to the upper end of the starting capacitor.

3. The energy extraction circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The power conversion circuit includes a third fully-controlled switch device and a power transformer. The control end of the third fully-controlled switch device is controlled by the output end of the main control circuit. The upper end of the primary side of the power transformer is connected to the upper end of the energy storage capacitor, and the lower end is grounded after passing through the third fully-controlled switch device. The secondary side of the power transformer outputs a second power supply VOUT2.

4. The energy-taking circuit according to claim 2 or 3, which is used in series with a voltage-equalizing resistor of a power module, is characterized in that: The second fully-controlled switch device and the third fully-controlled switch device are one of MOS, IGBT or triode.

5. The energy extraction circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The first voltage sampling circuit includes a first voltage-dividing resistor and a first hysteresis comparator. The upper end of the first voltage-dividing resistor is connected to the upper end of the energy storage capacitor, and the lower end is grounded. The voltage-dividing output end of the first voltage-dividing resistor is connected to the input end of the first hysteresis comparator, and the output end of the first hysteresis comparator is connected to the driving circuit.

6. The energy extraction circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The second voltage sampling circuit includes a second voltage-dividing resistor and a second hysteresis comparator. The upper end of the second voltage-dividing resistor is connected to the upper end of the energy storage capacitor, and the lower end is grounded. The voltage-dividing output end of the second voltage-dividing resistor is connected to the input end of the second hysteresis comparator, and the output end of the second hysteresis comparator is connected to the main control circuit.

7. The energy extraction circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The main control circuit is a main control MCU, the power supply end of the main control MCU is connected to the low voltage power supply end VCC, the input port is connected to the voltage sampling signal of the second voltage sampling circuit, and the output end outputs the start signal of the start circuit and the drive signal of the power conversion circuit.

8. The energy extraction circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The driving circuit is a triode amplifier circuit.

9. The energy extraction circuit used in series with a voltage-equalizing resistor of a power module according to claim 1, characterized in that: The first fully-controlled switch device is one of MOS, IGBT or triode.

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