Electric vehicle and IGBT driving power supply circuit

Abstract

The invention discloses an electric vehicle and an IGBT (Insulated Gate Bipolar Translator) driving power supply circuit. And the IGBT driving power supply circuit is electrically connected with the motor driving circuit. The IGBT driving power supply circuit outputs a positive voltage through the first output end and outputs a negative voltage through the second output end so as to control on and off of an upper bridge arm transistor and a lower bridge arm transistor in the motor driving circuit. The IGBT driving power supply circuit further comprises a power supply module, a transformer, a rectification module, a voltage stabilization module and a current control module. The power module provides an input voltage. The transformer converts an input voltage and outputs an AC voltage. The rectifier module outputs a DC voltage according to the received AC voltage. And the current control module is used for limiting the quiescent current in the voltage stabilizing module when the motor driving circuit is in a static state so as to reduce the electrostatic loss in the voltage stabilizing module. The voltage stabilizing module outputs positive voltage and negative voltage according to the output voltage of the current control module and stabilizes the positive voltage and the negative voltage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to an electric vehicle and an IGBT driving power supply circuit. BACKGROUND

[0002] At present, new energy motorcycles have a booming trend, and the permanent magnet motor controller is the core part of the new energy motorcycle. The core function is to control the safety of the insulated-gate bipolar transistor (IGBT) in the power module. Among them, the design focus is on the driving and protection of IGBT, which is related to the operation of the entire power module. The IGBT driving power supply circuit is used to provide the voltage and current required for the normal operation of the IGBT. The IGBT driving power supply circuit usually includes a direct current power supply, a transformer and an IGBT driving circuit. The direct current voltage provided by the direct current power supply is provided to the primary side of the transformer, and the secondary side of the transformer is connected with the IGBT driving circuit. The IGBT driving circuit provides the positive voltage and negative voltage required by the IGBT. Among them, the positive voltage is used to control the conduction of the IGBT, and the negative voltage is used to control the turn-off of the IGBT. In order to ensure that the IGBT can work safely, the stability of the positive voltage and the negative voltage is the design focus. The positive voltage and the negative voltage in the IGBT driving circuit need to be stabilized. Taking the scheme of connecting a zener diode and a resistor in series between two output terminals as an example, only the stability of the positive voltage can be guaranteed, and the negative voltage will fluctuate with the fluctuation of the alternating voltage provided by the transformer. Taking the scheme of connecting two zener diodes in series between two output terminals as an example, the voltage provided by the transformer usually needs to be slightly higher than the working voltage of the zener diode. However, when the IGBT is in a static state (i.e. the IGBT is not working), the voltage difference between the voltage provided by the transformer and the working voltage of the zener diode causes a loss on the zener diode, which may cause the zener diode to burn out when the loss is too large. SUMMARY

[0003] Therefore, the main purpose of the present application is to provide an electric vehicle and an IGBT driving power supply circuit, which aims to solve the problem of how to ensure the stability of the positive voltage and the negative voltage while reducing the static loss on the zener diode in the prior art.

[0004] An electric vehicle, comprising: a vehicle body; and The power system is arranged on the vehicle body; the power system comprises a motor drive circuit and an IGBT drive power supply circuit; the motor drive circuit comprises an upper bridge arm transistor and a lower bridge arm transistor; the IGBT drive power supply circuit comprises a first output end and a second output end; the IGBT drive power supply circuit outputs a positive voltage through the first output end and outputs a negative voltage through the second output end to control the conduction and the turn-off of the upper bridge arm transistor and the lower bridge arm transistor; the IGBT drive power supply circuit further comprises a power supply module, a transformer, a rectifier module, a voltage stabilizing module and a current control module; the power supply module is used to provide an input voltage; the transformer is used to convert the input voltage and output an alternating voltage; the rectifier module rectifies the received alternating voltage and outputs a direct voltage; the current control module is electrically connected between the rectifier module and the voltage stabilizing module; the current control module is used to limit the static current in the voltage stabilizing module when the motor drive circuit is in a static state; the voltage stabilizing module is used to output a positive voltage and a negative voltage according to the direct voltage and stabilize the positive voltage and the negative voltage; wherein the direct voltage is greater than or equal to the working voltage of the voltage stabilizing module.

[0005] In a possible implementation, the current control module is further used to adjust the current provided to the voltage stabilizing module according to the voltage difference between the output end of the rectifier module and the first output end in the form of amplification when the motor drive circuit is switched from the static state to a dynamic state.

[0006] In a possible implementation, the current control module comprises a switch tube and a voltage dividing resistor; the control end of the switch tube is electrically connected to the first output end through the voltage dividing resistor; the first connection end of the switch tube is electrically connected to the secondary coil of the transformer; and the second connection end of the switch tube is electrically connected to the first output end.

[0007] In a possible implementation, when the motor drive circuit is in the static state, the voltage on the voltage dividing resistor is less than or equal to the voltage difference between the direct voltage output by the rectifier module and the working voltage of the voltage stabilizing module.

[0008] In a possible implementation, when the motor drive circuit is switched from the static state to the dynamic state, the voltage of the first output end is pulled down, the output current of the switch tube is increased according to the voltage difference between the output end of the rectifier module and the first output end in the form of amplification, and the working voltage of the voltage stabilizing module is dynamically adjusted.

[0009] In addition, in order to achieve the above-mentioned purpose, the application further provides an IGBT drive power supply circuit, which is electrically connected to the motor drive circuit; the IGBT drive power supply circuit comprises a first output end and a second output end; the IGBT drive power supply circuit outputs a positive voltage through the first output end and outputs a negative voltage through the second output end to control the conduction and the turn-off of the upper bridge arm transistor and the lower bridge arm transistor in the motor drive circuit; the IGBT drive power supply circuit further comprises: The power module is configured to provide an input voltage; The transformer is configured to convert the input voltage and output an alternating voltage; The rectifier module is configured to rectify the received alternating voltage and output a direct voltage; The current control module is electrically connected between the rectifier module and the voltage stabilizing module, and is configured to limit the static current in the voltage stabilizing module when the motor driving circuit is in a static state; and The voltage stabilizing module is configured to output a positive voltage and a negative voltage according to the direct voltage and stabilize the positive voltage and the negative voltage, wherein the direct voltage is greater than or equal to a working voltage of the voltage stabilizing module.

[0010] In a possible implementation, the current control module is further configured to adjust the current provided to the voltage stabilizing module according to a voltage difference between an output end of the rectifier module and the first output end in an amplification multiple when the motor driving circuit is switched from the static state to a dynamic state.

[0011] In a possible implementation, the current control module includes a switch tube and a voltage dividing resistor, a control end of the switch tube is electrically connected to the first output end through the voltage dividing resistor, a first connection end of the switch tube is electrically connected to the secondary coil of the transformer, and a second connection end of the switch tube is electrically connected to the first output end.

[0012] In a possible implementation, when the motor driving circuit is in the static state, a voltage on the voltage dividing resistor is less than or equal to a voltage difference between the direct voltage output by the rectifier module and the working voltage of the voltage stabilizing module.

[0013] In a possible implementation, when the motor driving circuit is switched from the static state to the dynamic state, the voltage of the first output end is pulled down, an output current of the switch tube is increased according to the voltage difference between the output end of the rectifier module and the first output end in an amplification multiple, and the working voltage of the voltage stabilizing module is dynamically adjusted.

[0014] The provided electric vehicle and IGBT driving power supply circuit can limit the current in the voltage stabilizing module when the motor driving circuit is in the static state through the current control module, thereby reducing the static loss on the voltage stabilizing module. Meanwhile, the working voltage of the positive voltage stabilizing module is quickly and dynamically adjusted by the current control module when the motor driving circuit is switched from the static state to the dynamic state, so as to maintain the stability of the positive voltage and the negative voltage. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on the provided drawings.

[0016] Figure 1 A perspective view of an electric vehicle according to an embodiment of the present application.

[0017] Figure 2 A schematic diagram of a module of an IGBT driving power supply circuit according to an embodiment of the present application.

[0018] Figure 3 A circuit schematic diagram of an IGBT driving power supply circuit according to an embodiment of the present application. Figure 2 A circuit schematic diagram of an IGBT driving power supply circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the personnel in the technical field better understand the technical solutions of the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should belong to the protection scope of the present application.

[0020] The terms "first", "second", and "third" and the like in the specification of the present application and the above drawings are used to distinguish different objects, and are not used to describe a specific sequence. In addition, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0023] The specific embodiments of the electric vehicle and the IGBT driving power supply circuit of the present application will be described below in conjunction with the drawings.

[0024] The application provides an electric vehicle and an IGBT driving power supply circuit, which can reduce the static loss of a voltage stabilizing diode while ensuring the stability of positive voltage and negative voltage.

[0025] Please refer to Figure 1 which is a perspective view of an electric vehicle 10 provided by an embodiment of the application. In at least one embodiment of the application, the electric vehicle 10 is an electric motorcycle. In other embodiments, the electric vehicle 10 can also be a pure electric vehicle or a hybrid electric vehicle with a battery. The electric vehicle 10 comprises a power system 11 and a vehicle body 12.

[0026] Please refer to Figure 2 which is a module schematic diagram of an IGBT driving power supply circuit 112. The power system 11 is arranged on the vehicle body 12, and the power system 11 comprises a motor (not shown in the figure), a motor driving circuit 111 and the IGBT driving power supply circuit 112. The motor driving circuit 111 comprises a series connection of an upper bridge arm transistor T1 and a lower bridge arm transistor T2. The upper bridge arm transistor T1 and the lower bridge arm transistor T2 are IGBT tubes, which are used to drive the motor to work.

[0027] The IGBT driving power supply circuit 112 is electrically connected with the motor driving circuit 111, and the IGBT driving power supply circuit 112 is used to provide positive voltage and negative voltage to the motor driving circuit 111. The positive voltage is the on voltage of the upper bridge arm transistor T1 and the lower bridge arm transistor T2, and the negative voltage is the off voltage of the upper bridge arm transistor T1 and the lower bridge arm transistor T2. The IGBT driving power supply circuit 112 comprises a power module 1121, a transformer 1122, a rectifier module 1123, a current control module 1124 and a voltage stabilizing module 1125.

[0028] Please refer to Figure 3 which is a circuit schematic diagram of the IGBT driving power supply circuit 112. The power module 1121 is used to provide an input voltage to the transformer 1122. The power module 1121 can comprise a battery Vin, a control chip U1 and an adjusting capacitor C10. In at least one embodiment of the application, the battery Vin is a battery in the electric vehicle 10 (as shown in Figure 1 ), which is used to provide a 12V voltage. The control chip U1 is electrically connected with a primary coil of the transformer 1122. The control chip U1 is used to work according to the input voltage provided by the battery Vin and control the coupling of the primary coil and the secondary coil of the transformer 1122. The control chip U1 has a switch therein, and the switch in the control chip U1 is switched between on and off to realize the coupling of the primary coil and the secondary coil of the transformer 1122, thereby realizing energy transmission. The adjusting capacitor C10 is used to smooth the voltage ripple.

[0029] Transformer 1122 is used to convert the input voltage output from power module 1121 and output AC voltage to rectifier module 1123. Transformer 1122 includes a primary coil and multiple secondary coils. One end of the primary coil is electrically connected to battery Vin, and the other end is electrically connected to control chip U1. The primary coil stores energy and, under the control of control chip U1, couples the stored energy to the secondary coils. Each secondary coil provides AC voltage to rectifier module 1123. The magnitude of the AC voltage is proportional to the turns ratio of transformer 1122. In at least one embodiment of this application, Figure 3 Only the primary coil T10 and the secondary coil T11 are shown in the diagram. In other embodiments, the number of secondary coils can be adjusted according to the needs of the electric vehicle 10.

[0030] A rectifier module 1123 is electrically connected between the secondary coil of transformer 1122 and current control module 1124. The rectifier module 1123 is used to rectify the AC voltage output from the secondary coil of transformer 1122 and output a DC voltage. In at least one embodiment of this application, the DC voltage output by the rectifier module 1123 is 22 volts (V). The rectifier module 1123 includes a rectifier diode D10 and a transformer energy storage capacitor C20. The anode of the rectifier diode D10 is electrically connected to the corresponding secondary coil in transformer 1122, and the cathode of the rectifier diode D10 is electrically connected to current control module 1124. The rectifier diode D10 is used to convert the AC voltage output from the secondary coil of transformer 1122 into a DC voltage. The first terminal of the transformer energy storage capacitor C20 is electrically connected to the cathode of the rectifier diode D10, and the second terminal is electrically connected to the corresponding secondary coil in transformer 1122. The transformer energy storage capacitor C20 is used to store the DC voltage. In at least one embodiment of this application, Figure 3 The diagram illustrates two rectifier modules 1123, a primary coil T10, and a secondary coil T11. In the first rectifier module 1123, the anode of the rectifier diode D10 is electrically connected to the corresponding primary coil T10, and in the second rectifier module 1123, the anode of the rectifier diode D10 is electrically connected to the corresponding secondary coil T11.

[0031] The current control module 1124 is electrically connected between the rectifier module 1123 and the voltage stabilizing module 1125. The current control module 1124 is configured to receive the direct current voltage output by the rectifier module 1123, limit the static current provided to the voltage stabilizing module 1125 when the motor driving circuit 111 is in a static state, and rapidly adjust the voltage in the voltage stabilizing module 1125 when the motor driving circuit 111 is switched from the static state to a dynamic state. When the electric vehicle 10 is in a standby state, the motor driving circuit 111 is in the static state. When the electric vehicle 10 is switched from the standby state to a starting state, the motor driving circuit 111 is switched from the static state to the dynamic state. The current control module 1124 includes a switch tube Q10 and a voltage dividing resistor R10. The control end of the switch tube Q10 is electrically connected to the first output end VCC+ through the voltage dividing resistor R10. The first connection end of the switch tube Q10 is electrically connected to the secondary coil of the transformer 1122 through a rectifier diode D10, and is electrically connected to the cathode of the rectifier diode D10 and the first end of a transformer energy storage capacitor C20. The second connection end of the switch tube Q10 is electrically connected to the first output end VCC+. In at least one embodiment of the present application, the switch tube Q10 is a PNP type triode, the control end is the base, the first connection end is the emitter, and the second connection end is the collector.

[0032] The voltage stabilizing module 1125 is electrically connected with the first output terminal VCC+ and the second output terminal VCC-, and is electrically connected with the current control module 1124. The voltage stabilizing module 1125 is configured to output a positive voltage through the first output terminal VCC+ and output a negative voltage through the second output terminal VCC- according to the output voltage of the current control module 1124, and stabilize the voltage of the first output terminal VCC+ and the second output terminal VCC-. The voltage stabilizing module 1125 comprises a positive voltage stabilizing diode D20, a negative voltage stabilizing diode D21, a positive voltage energy storage capacitor C30, and a negative voltage energy storage capacitor C31. The positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21 are connected in series between the first output terminal VCC+ and the second output terminal VCC-. The positive voltage energy storage capacitor C30 and the negative voltage energy storage capacitor C31 are connected in series between the first output terminal VCC+ and the second output terminal VCC-. The cathode of the positive voltage stabilizing diode D20 is electrically connected with the first output terminal VCC+, and the anode of the positive voltage stabilizing diode D20 is electrically connected with the ground terminal GND1. The positive voltage stabilizing diode D20 is configured to stabilize the positive voltage provided by the first output terminal VCC+. The cathode of the negative voltage stabilizing diode D21 is electrically connected with the ground terminal GND1, and the anode of the negative voltage stabilizing diode D21 is electrically connected with the second output terminal VCC-. The negative voltage stabilizing diode D21 is configured to stabilize the negative voltage provided by the second output terminal VCC+. The two ends of the positive voltage energy storage capacitor C30 are electrically connected with the anode and the cathode of the positive voltage stabilizing diode D20, respectively. The positive voltage energy storage capacitor C30 is configured to store a positive voltage, and provide a transient voltage for the motor driving circuit 111 when the positive voltage stabilizing diode D20 stops working. The two ends of the negative voltage energy storage capacitor C31 are electrically connected with the anode and the cathode of the negative voltage stabilizing diode D21, respectively. The negative voltage energy storage capacitor C31 is configured to store a negative voltage, and provide a transient voltage for the motor driving circuit 111 when the negative voltage stabilizing diode D21 stops working. In at least one embodiment of the present application, the working voltage of the positive voltage stabilizing diode D20 is 15V, and the working voltage of the negative voltage stabilizing diode D21 is 5V.

[0033] The specific working principle of the IGBT driving power supply circuit 112 is as follows: When the electric vehicle 10 is in standby state, the motor drive circuit 111 is in static state, and the voltage at the control terminal of the switch tube Q10 is the working voltage of the voltage stabilizing diode D20. At this time, the switch tube Q10 is turned on and works in amplification mode. The current provided to the positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21 is determined by the voltage difference between the direct current voltage output by the rectifier diode D10 and the working voltage of the positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21 and the resistance of the voltage dividing resistor R10. When the motor drive circuit 111 is in static state, the voltage difference between the direct current voltage output by the rectifier diode D10 and the working voltage of the voltage stabilizing module 1125 (i.e., the sum of the working voltage of the positive voltage stabilizing diode D20 and the working voltage of the negative voltage stabilizing diode D21) is applied to the voltage dividing resistor R10. That is, the voltage on the voltage dividing resistor R10 is less than or equal to the voltage difference between the direct current voltage provided by the rectifier module 1123 and the working voltage of the voltage stabilizing module 1125, and the current flowing through the positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21 is limited within a predetermined range to reduce the static loss on the positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21. The input current (base current Ib) of the switch tube Q10 is controlled by the voltage difference between the direct current voltage provided by the current control module 1124 and the working voltage of the voltage stabilizing module 1125 and the resistance of the voltage dividing resistor R10. When the voltage difference is small, the base current in the switch tube Q10 is small, and the output current (collector current Ic) of the switch tube Q10 is also small, thereby achieving control of the static current provided to the positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21.

[0034] When the electric vehicle 10 is switched to the starting state, the motor drive circuit 111 is switched from static state to dynamic state. At this time, the voltage at the first output terminal VCC+ is pulled down due to the current demand of the motor drive circuit 111. The voltage at the control terminal of the switch tube Q10 is the difference between the working voltage of the voltage stabilizing module 1125 and the demand voltage of the motor drive circuit 111. That is, the voltage difference between the control terminal of the switch tube Q10 and the first connection terminal increases, causing the output current of the switch tube Q10 to rapidly increase. Therefore, the current flowing through the positive voltage stabilizing diode D20 and the negative voltage stabilizing diode D21 rapidly increases, causing the voltage at the first output terminal VCC+ to be rapidly pulled up, thereby achieving dynamic adjustment of the voltage in the voltage stabilizing module 1125. That is, the output current (collector current Ic) of the switch tube Q10 rapidly increases according to the amplification factor β.

[0035] The electric vehicle 10 and the IGBT driving power supply circuit 112 can reduce the static loss on the voltage stabilizing module 1125 by setting the current control module 1124 to limit the current in the voltage stabilizing module 1125 when the motor driving circuit 111 is static. Meanwhile, the current control module 1124 can be used to quickly dynamically adjust the working voltage of the voltage stabilizing module 1125 when the motor driving circuit 111 is switched from static to dynamic. Meanwhile, the positive voltage stabilizing diode D20 can be used to stabilize the positive voltage of the first output terminal VCC+, and the negative voltage stabilizing diode D21 can be used to stabilize the negative voltage output by the second output terminal VCC-.

[0036] The above-described embodiments are merely used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric vehicle, comprising: a vehicle body; and a power system arranged on the vehicle body; the power system comprising a motor drive circuit and an IGBT drive power supply circuit; the motor drive circuit comprising an upper bridge arm transistor and a lower bridge arm transistor; the IGBT drive power supply circuit comprising a first output terminal and a second output terminal; the IGBT drive power supply circuit outputs a positive voltage through the first output terminal and a negative voltage through the second output terminal to control the conduction and turn-off of the upper bridge arm transistor and the lower bridge arm transistor; characterized in that: the IGBT drive power supply circuit further comprises a power supply module, a transformer, a rectifier module, a voltage stabilizing module and a current control module; the power supply module is configured to provide an input voltage; the transformer is configured to convert the input voltage and output an alternating voltage; the rectifier module rectifies the received alternating voltage and outputs a direct voltage; the current control module is electrically connected between the rectifier module and the voltage stabilizing module; the current control module is configured to limit the static current in the voltage stabilizing module when the motor drive circuit is in a static state; the voltage stabilizing module is configured to output the positive voltage and the negative voltage according to the output voltage of the current control module and stabilize the positive voltage and the negative voltage; wherein the direct voltage is greater than or equal to the working voltage of the voltage stabilizing module. The current control module is further configured to adjust the current provided to the voltage stabilizing module by a magnification factor according to the voltage difference between the output terminal of the rectifier module and the first output terminal when the motor drive circuit switches from the static state to a dynamic state.

2. The electric vehicle of claim 1, wherein, The current control module comprises a switch tube and a voltage dividing resistor; the control end of the switch tube is electrically connected to the first output terminal through the voltage dividing resistor, the first connection end of the switch tube is electrically connected to the secondary coil of the transformer, and the second connection end of the switch tube is electrically connected to the first output terminal.

3. The electric vehicle of claim 2, wherein, When the motor drive circuit is in a static state, the voltage on the voltage dividing resistor is less than or equal to the voltage difference between the direct voltage output by the rectifier module and the working voltage of the voltage stabilizing module.

4. The electric vehicle of claim 3, wherein, When the motor drive circuit switches from the static state to the dynamic state, the voltage of the first output terminal is pulled down, the output current of the switch tube is increased by the magnification factor according to the voltage difference between the output terminal of the rectifier module and the first output terminal, and the working voltage of the voltage stabilizing module is dynamically adjusted.

5. The electric vehicle of claim 3, wherein, The IGBT drive power supply circuit further comprises:

6. An IGBT driving power supply circuit, applied to the electric vehicle of any one of claims 1-5, and electrically connected with the motor driving circuit; the IGBT driving power supply circuit comprises a first output end and a second output end; the IGBT driving power supply circuit outputs a positive voltage through the first output end and outputs a negative voltage through the second output end, so as to control the conduction and the turn-off of the upper bridge arm transistor and the lower bridge arm transistor in the motor driving circuit; characterized in that: a power supply module configured to provide an input voltage; a transformer configured to convert the input voltage and output an alternating voltage; a rectifier module configured to rectify the received alternating voltage and output a direct voltage; a current control module electrically connected between the rectifier module and a voltage stabilizing module; the current control module is configured to limit the static current in the voltage stabilizing module when the motor drive circuit is in a static state; and ​ A voltage stabilizing module is configured to output and stabilize the positive voltage and the negative voltage according to the voltage output by the current control module; wherein the direct current voltage is greater than or equal to the working voltage of the voltage stabilizing module.

7. The IGBT driver power supply circuit of claim 6, wherein, The current control module is further configured to adjust the current provided to the voltage stabilizing module by a magnification factor according to the voltage difference between the output end of the rectifying module and the first output end when the motor driving circuit is switched from static to dynamic.

8. The IGBT driver power supply circuit of claim 7, wherein, The current control module comprises a switch tube and a voltage dividing resistor; the control end of the switch tube is electrically connected to the first output end through the voltage dividing resistor; the first connection end of the switch tube is electrically connected to the secondary coil of the transformer; and the second connection end of the switch tube is electrically connected to the first output end.

9. The IGBT driver power supply circuit of claim 8, wherein, When the motor driving circuit is in static state, the voltage on the voltage dividing resistor is less than or equal to the voltage difference between the direct current voltage output by the rectifying module and the working voltage of the voltage stabilizing module.

10. The IGBT driver power supply circuit of claim 8, wherein, When the motor driving circuit is switched from static to dynamic, the voltage of the first output end is pulled low, the output current of the switch tube is increased by the magnification factor according to the voltage difference between the output end of the rectifying module and the first output end, and the working voltage of the voltage stabilizing module is dynamically adjusted.

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