Driving power supply and power equipment

Abstract

The invention provides a driving power supply and power equipment, and relates to the technical field of power electronics. The driving power supply comprises a transformer, the transformer comprises a first primary winding and a secondary winding, and the first end of the first primary winding is connected with the power supply; the input end of the pull-push circuit is used for receiving the first control signal transmitted by the controller, and the output end of the pull-push circuit is used for outputting a second control signal; the control end of the first switch tube is connected with the output end of the push circuit, the first end of the first switch tube is connected with the second end of the first primary winding, the second end of the first switch tube is grounded, and the first switch tube responds to the second control signal to switch the on-off state; and the output circuit is connected with the secondary winding, and the output circuit is used for outputting a voltage driving signal. According to the invention, the compatibility of the driving power supply to driving voltages of different power devices is improved.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and more particularly, to a drive power supply and a power device. Background Art

[0002] With the development of new energy technology and the progress of the charging pile and energy storage industries, the requirements for efficiency, power density, and voltage range are getting higher and higher, and SiC MOSFET (silicon carbide transistor) has gradually become the mainstream power device. The recommended drive voltages of SiC MOSFETs from different brands are not exactly the same.

[0003] Such as Figure 5 and Figure 6 In the related technologies shown, different drive power supply transformers are used to be compatible with silicon carbide power devices from different brands. Among them, there are problems of uncontrolled drive power supply voltage output and poor voltage accuracy. Summary of the Invention

[0004] The present application aims to solve the problems of uncontrolled drive power supply voltage output and voltage accuracy in the prior art or related technologies.

[0005] To this end, a first aspect of the present application provides a drive power supply.

[0006] A second aspect of the present application provides a power device.

[0007] In view of this, according to a first aspect of the present application, a drive power supply is provided, including: a transformer, the transformer includes a first primary winding and a secondary winding, and a first end of the first primary winding is connected to a power supply; a push-pull circuit, an input end of the push-pull circuit is configured to receive a first control signal transmitted by a controller, and an output end of the push-pull circuit is configured to output a second control signal; a first switching tube, a control end of the first switching tube is connected to the output end of the push-pull circuit, a first end of the first switching tube is connected to a second end of the first primary winding, a second end of the first switching tube is grounded, and the first switching tube switches its on-off state in response to the second control signal; an output circuit, the output circuit is connected to the secondary winding, and the output circuit is configured to output a voltage drive signal.

[0008] In the technical solution of the present application, by providing a push-pull circuit and a first switching tube in the drive circuit of the drive power supply, the drive circuit can be controlled by the first control signal output by the controller, so that the controller can adjust the duty cycle of the signal output by the drive circuit through the first control signal output by the controller to adjust the voltage of the voltage drive signal, and can output a corresponding voltage drive signal according to the recommended drive voltage of the power device driven by the drive power supply, thereby improving the compatibility of the drive power supply with the drive voltages of different power devices.

[0009] In some technical solutions, optionally, the first control signal includes a high-level signal and a low-level signal. The high-level signal is used to drive the first switching transistor to be in a conducting state, and the low-level signal is used to drive the first switching transistor to be in a non-conducting state;

[0010] The push-pull circuit includes: a second switching transistor, the control terminal of the second switching transistor is used to receive the first control signal, the first terminal of the second switching transistor is connected to the power supply, the second terminal of the second switching transistor is used to output a second control signal, and when the first control signal is a high-level signal, the second switching transistor conducts; a third switching transistor, the control terminal of the third switching transistor is used to receive the first control signal, the first terminal of the third switching transistor is used to output the second control signal, the second terminal of the third switching transistor is grounded, and when the first control signal is a low-level signal, the third switching transistor conducts.

[0011] In the technical solution of the present application, a second switching transistor and a third switching transistor are arranged in the push-pull circuit, and the second switching transistor is set to conduct when the level is high, and the third switching transistor is set to conduct when the level is low. The controller can control the on-off state of the first switching transistor by selecting to transmit a high-level signal or a low-level signal to the push-pull circuit, so that the push-pull circuit can amplify the received first control signal, and improve the stability and timeliness of controlling the on-off state of the first switching transistor.

[0012] In some technical solutions, optionally, the push-pull circuit further includes: a first resistor, the first terminal of the first resistor is connected to the output terminal of the controller, and the second terminal of the first resistor is connected to the control terminals of the second switching transistor and the third switching transistor; a second resistor, the first terminal of the second resistor is connected to the second terminal of the second switching transistor and the first terminal of the third switching transistor, and the second terminal of the second resistor is connected to the control terminal of the first switching transistor.

[0013] In the technical solution of the present application, a first resistor and a second resistor are respectively arranged at the input end and the output end of the push-pull circuit. The first resistor is used to limit the current of the first control signal received by the push-pull circuit, and the first resistor is used to limit the current of the second control signal output by the push-pull circuit, so as to be able to limit the current of the second switching transistor and the third switching transistor inside the push-pull circuit, as well as the first switching transistor outside the push-pull circuit, and improve the stability and safety of the operation of the drive power supply.

[0014] In some technical solutions, optionally, the output circuit includes: a charge and discharge module, connected to the secondary winding; a rectification module, connected between the charge and discharge module and the secondary winding; a voltage stabilization module, the first terminal of the voltage stabilization module is connected to the output terminal of the charge and discharge module, and the second terminal of the voltage stabilization module is used to output a voltage drive signal.

[0015] In the technical solution of this application, the output circuit includes a charge and discharge module, a rectification module, and a voltage stabilization module. The charge and discharge module can store energy when the secondary winding is powered on, and output a voltage drive signal when the secondary winding is powered off. The rectification module is located between the charge and discharge circuit and the output terminal of the secondary winding, and works when the transformer transfers energy to rectify the voltage signal output by the secondary winding, so that the voltage signals transmitted to the charge and discharge module are all rectified DC voltage signals. The voltage stabilization module is connected to the output terminal of the charge and discharge module, and the voltage stabilization module can stabilize the output voltage drive signal to improve the voltage accuracy of the output voltage drive signal.

[0016] In some technical solutions, optionally, the rectification module includes: a first diode, the first end of the first diode is connected to the first end of the secondary winding, the second end of the secondary winding is grounded, the second end of the first diode is connected to the voltage stabilization module, and the first end to the second end of the first diode conducts unidirectionally.

[0017] In the technical solution of this application, by setting a first diode with unidirectional conduction in the rectification module, the voltage signal conducts unidirectionally in the direction from the secondary winding to the charge and discharge module, further improving the voltage stability of the voltage drive signal output by the drive power supply.

[0018] In some technical solutions, optionally, the voltage drive signal includes a positive voltage drive signal and a negative voltage drive signal, the charge and discharge module includes a first capacitor, and the voltage stabilization module includes:

[0019] A positive voltage stabilization unit, the first end of the positive voltage stabilization unit is connected to the first end of the first capacitor, and the second end of the positive voltage stabilization unit is used to output a positive voltage drive signal; a negative voltage stabilization unit, the first end of the negative voltage stabilization unit is connected to the second end of the first capacitor, and the second end of the negative voltage stabilization unit is used to output a negative voltage drive signal.

[0020] In the technical solution of this application, by setting a positive voltage stabilization unit and a negative voltage stabilization unit in the voltage stabilization module, the voltage stabilization module can stabilize the positive voltage drive signal and the negative voltage drive signal output by the drive power supply, further improving the voltage stability of the voltage drive signal output by the drive power supply.

[0021] In some technical solutions, optionally, the positive voltage stabilization unit includes: a second capacitor, the first end of the second capacitor is connected to the first end of the first capacitor; a fourth switch tube, the first end of the fourth switch tube is connected to the first end of the second capacitor, and the second end of the fourth switch tube is used to output a positive voltage drive signal; a shunt regulator, the cathode of the shunt regulator is connected to the control end of the fourth switch tube, and the anode of the shunt regulator is connected to the second end of the second capacitor; a resistor sampling component, the first end of the resistor sampling component is connected to the second end of the fourth switch tube, the second end of the resistor sampling component is connected to the second end of the second capacitor, and the output end of the resistor sampling component is connected to the reference end of the shunt regulator.

[0022] In the technical solution of the present application, by arranging a shunt regulator and a fourth switching transistor in the positive-pressure voltage stabilizing unit, and by cooperating the fourth switching transistor with the shunt regulator, the positive-pressure driving signal can be voltage-stabilized, improving the voltage stability of the positive-pressure driving signal.

[0023] In some technical solutions, optionally, the resistance sampling component includes: a third resistor, the first end of the third resistor is connected to the second end of the fourth switching transistor, and the second end of the third resistor is connected to the reference terminal of the shunt regulator; a fourth resistor, the first end of the fourth resistor is connected to the reference terminal of the shunt regulator, and the second end of the fourth resistor is connected to the second end of the second capacitor.

[0024] In the technical solution of the present application, the resistance sampling component includes a third resistor and a fourth resistor arranged in series, and the series-connected third resistor and fourth resistor are connected in parallel with the second capacitor, which can sample the positive-pressure driving signal. The common terminal of the third resistor and the fourth resistor serves as the output terminal of the sampling voltage signal and is connected to the reference terminal of the shunt regulator, thereby transmitting the voltage sampling signal to the shunt regulator, enabling the shunt regulator to cooperate with the fourth switching transistor to voltage-stabilize the positive-pressure driving signal output by the driving power supply.

[0025] In some technical solutions, optionally, the positive-pressure voltage stabilizing unit further includes: a third capacitor, the first end of the third capacitor is connected to the first end of the second capacitor, and the second end of the third capacitor is connected to the second end of the second capacitor; a fourth capacitor, the first end of the fourth capacitor is connected to the first end of the second capacitor, and the second end of the fourth capacitor is connected to the second end of the second capacitor.

[0026] In the technical solution of the present application, a third capacitor and a fourth capacitor are also arranged in parallel in the positive-pressure voltage stabilizing unit, and both the third capacitor and the fourth capacitor are connected in parallel with the second capacitor, and the third capacitor and the fourth capacitor are located at the rear end of the shunt regulator and the fourth switching transistor. The third capacitor and the fourth capacitor can store energy and filter out high-frequency ripples, further improving the stability of the positive-pressure driving signal output by the positive-pressure voltage stabilizing unit.

[0027] In some technical solutions, optionally, the negative-pressure voltage stabilizing unit includes: a fifth capacitor, the first end of the fifth capacitor is connected to the second end of the first capacitor; a voltage-regulator diode, the first end of the voltage-regulator diode is connected to the first end of the fifth capacitor, and the second end of the voltage-regulator diode is connected to the second end of the fifth capacitor, and the voltage-regulator diode conducts unidirectionally from the first end to the second end; a sixth capacitor, the first end of the sixth capacitor is connected to the first end of the fifth capacitor, and the second end of the sixth capacitor is connected to the second end of the fifth capacitor; a seventh capacitor, the first end of the seventh capacitor is connected to the first end of the fifth capacitor, and the second end of the seventh capacitor is connected to the second end of the fifth capacitor.

[0028] In the technical solution of the present application, a voltage stabilizing diode is provided in the negative voltage stabilizing unit. The voltage clamping function of the voltage stabilizing diode can provide a voltage stabilizing signal for the negative voltage driving signal output by the driving power supply. A sixth capacitor and a seventh capacitor are connected in parallel at the rear end of the voltage stabilizing diode, which can further improve the stability of the negative voltage driving signal output by the negative voltage stabilizing unit.

[0029] In some technical solutions, optionally, the driving power supply further includes: a second primary winding, the first end of the second primary winding is connected to the power supply; a second diode, the first end of the second diode is grounded, and the second end of the second diode is connected to the second end of the second primary winding.

[0030] In the technical solution of the present application, a reset circuit is provided on the primary side of the transformer of the driving power supply, and a second primary winding and a unidirectional conduction second diode are provided in the reset circuit, so that when the transformer stops transmitting energy, the energy inside the transformer can be reset in time through the reset circuit.

[0031] In some technical solutions, optionally, the number of secondary windings is at least two, the number of output circuits is at least two, and the output circuits are arranged in one-to-one correspondence with the secondary windings.

[0032] In the technical solution of the present application, the number of secondary windings can be multiple, and each secondary winding corresponds to an output circuit. The circuit structures of the output circuits corresponding to different secondary windings are the same and have the same functions, enabling the driving power supply to have multiple output ports to synchronously drive multiple loads.

[0033] In some technical solutions, optionally, the driving power supply further includes: an eighth capacitor, a ninth capacitor, and a tenth capacitor. The eighth capacitor, the ninth capacitor, and the tenth capacitor are connected in parallel between the power supply and the ground terminal. The parallel-connected eighth capacitor, ninth capacitor, and tenth capacitor can play a role in energy storage and high-frequency filtering.

[0034] According to the second aspect of the present application, a power device is provided, including: a load; the driving power supply in any of the above technical solutions, and the output circuit of the driving power supply is connected to the load line for outputting a voltage driving signal to the load. Since the driving power supply is the driving power supply in any of the above technical solutions, it has all the beneficial effects of the driving power supply in any of the above technical solutions, which will not be elaborated here.

[0035] In some technical solutions, optionally, the power device includes any one of the following: an inverter device, a charging pile, an energy storage device.

[0036] The additional aspects and advantages of the present application will become apparent in the following description section or be learned through the practice of the present application. Description of the Drawings

[0037] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0038] Figure 1 FIG. 4 shows one of the circuit topologies of a driving power supply provided in some embodiments of the present application;

[0039] Figure 2 FIG. 8 shows another circuit topology of a driving power supply provided in some embodiments of the present application;

[0040] Figure 3 FIG. 12 shows a structural block diagram of a driving power supply provided in some embodiments of the present application;

[0041] Figure 4 FIG. 16 shows a structural block diagram of a power device provided in some embodiments of the present application;

[0042] Figure 5 FIG. 20 shows a circuit topology of a power supply in the related art;

[0043] Figure 6 FIG. 24 shows a circuit topology of a power supply in the related art.

[0044] Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The reference numerals of FIGS. 4, 8, 12, 16, 20, and 24 are as follows:

[0045] 100 driving power supply, 110 transformer, 120 push-pull circuit, 130 output circuit, 131 charge and discharge module, 132 rectification module, 133 voltage regulation module, 1331 positive voltage regulation unit, 1332 negative voltage regulation unit, 1333 resistance sampling component, 140 controller, 150 reset circuit, 160 drive circuit, Q1 first switching transistor, Q2 second switching transistor, Q3 third switching transistor, Q4 fourth switching transistor, R1 first resistor, R2 second resistor, R3 third resistor, R4 fourth resistor, R5 fifth resistor, D1 first diode, D2 second diode, C1 first capacitor, C2 second capacitor, C3 third capacitor, C4 fourth capacitor, C5 fifth capacitor, C6 sixth capacitor, C7 seventh capacitor, C8 eighth capacitor, C9 ninth capacitor, C10 tenth capacitor, ZD voltage regulator diode, U1 shunt regulator, N1 first primary winding, N2 secondary winding, N21 first secondary sub-winding, N2n nth secondary sub-winding, N3 second primary winding, V power supply, GND ground terminal, 200 power device, 202 load. Detailed Embodiments

[0046] To more clearly understand the above objects, features, and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the features in this embodiment and the embodiments can be combined with each other.

[0047] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0048] The following refers to Figures 1 to 4 Describe a driving power supply and a power device according to some embodiments of the present application.

[0049] In an embodiment according to the present application, Figure 1 One of the circuit topologies of a driving power supply provided in some embodiments of the present application is shown. Figure 2 Another circuit topology of a driving power supply provided in some embodiments of the present application is shown. Figure 3 A structural block diagram of a driving power supply provided in some embodiments of the present application is shown, such as Figure 1 、 Figure 2 and Figure 3 As shown, a driving power supply 100 is proposed, including: a transformer 110, the transformer 110 includes a first primary winding N1 and a secondary winding N2, a first end of the first primary winding N1 is connected to a power supply V; a push-pull circuit 120, an input end of the push-pull circuit 120 is used to receive a first control signal transmitted by a controller 140, and an output end of the push-pull circuit 120 is used to output a second control signal; a first switching transistor Q1, a control end of the first switching transistor Q1 is connected to the output end of the push-pull circuit 120, a first end of the first switching transistor Q1 is connected to a second end of the first primary winding N1, a second end of the first switching transistor Q1 is grounded, and the first switching transistor Q1 switches its on-off state in response to the second control signal; an output circuit 130, the output circuit 130 is connected to the secondary winding N2, and the output circuit 130 is used to output a voltage driving signal.

[0050] In this embodiment, the driving power supply 100 includes a push-pull circuit 120, a transformer 110, and an output circuit 130. The input end of the push-pull circuit 120 is connected to the controller 140. The controller 140 can transmit a first control signal to the push-pull circuit 120, and the push-pull circuit 120 can convert the first control signal into a second control signal of the first switching transistor Q1. Transmitting the second control signal to the first switching transistor Q1 can control the on-off state of the first switching transistor Q1. The push-pull circuit 120 and the first switching transistor Q1 can form a driving circuit 160, and the driving circuit 160 can drive the transformer 110 and the output circuit 130 in response to the first control signal output by the controller 140. The controller 140 can be an MCU (Micro Controller Unit), and the driving capability of the first control signal output by the MCU is relatively weak. The push-pull circuit 120 can amplify the first control signal output by the MCU to obtain a second control signal, so that the first switching transistor Q1 can perform an on-off action in response to the amplified second control signal. The transformer 110 includes a first primary winding N1 and a secondary winding N2. The first end and the second end of the first primary winding N1 are respectively connected to the power supply V and the first end of the first switching transistor Q1, and the secondary winding N2 is connected to the output circuit 130. Thus, when the transformer 110 transfers energy, the output circuit 130 starts to work to supply power to the load.

[0051] Exemplarily, the first switching transistor Q1 can be selected as a MOS transistor (Metal Oxide Semiconductor field effect transistor). The G pole (Gate) of the first switching transistor Q1 is the control end. The D pole (Drain) of the first switching transistor Q1 is connected to the second end of the first primary winding N1, and the S pole (Source) of the first switching transistor Q1 is grounded.

[0052] Exemplarily, the first control signal output by the controller 140 is a PWM (Pulse-Width Modulation) signal.

[0053] Specifically, when the first switching transistor Q1 is controlled to conduct, the voltage of the first primary winding N1 is a forward voltage, the transformer 110 transfers energy, the output circuit 130 operates to supply power to the load, and the charge and discharge module 131 in the output circuit 130 is charged. When the first switching transistor Q1 is controlled to turn off, the voltage of the first primary winding N1 is a reverse voltage, and the transformer 110 performs an energy reset operation. At this time, power is supplied to the load through the charge and discharge module 131 in the output circuit 130, thereby outputting a stable voltage drive signal. Since the on / off state of the first switching transistor Q1 is controlled by the first control signal output by the controller 140, the controller 140 can adjust the duty cycle of the signal output by the drive circuit 160 by adjusting the output first control signal, thereby adjusting the voltage of the voltage drive signal output by the drive power supply 100.

[0054] In the embodiment of the present application, by arranging the push-pull circuit 120 and the first switching transistor Q1 in the drive circuit 160 of the drive power supply 100, the drive circuit 160 can be controlled by the first control signal output by the controller 140, so that the controller 140 can adjust the duty cycle of the signal output by the drive circuit 160 through the first control signal output by the controller 140 to adjust the voltage of the voltage drive signal, and can output a corresponding voltage drive signal according to the recommended drive voltage of the power device driven by the drive power supply 100, thereby improving the compatibility of the drive voltage of the drive power supply 100 for different power devices.

[0055] As Figures 1 to 3 shown, in some embodiments, optionally, the first control signal includes a high-level signal and a low-level signal. The high-level signal is used to drive the first switching transistor Q1 to be in the on state, and the low-level signal is used to drive the first switching transistor Q1 to be in the off state;

[0056] The push-pull circuit 120 includes: a second switching transistor Q2, the control terminal of the second switching transistor Q2 is used to receive the first control signal, the first terminal of the second switching transistor Q2 is connected to the power supply V, the second terminal of the second switching transistor Q2 is used to output a second control signal, and the second switching transistor Q2 conducts when the first control signal is a high-level signal; a third switching transistor Q3, the control terminal of the third switching transistor Q3 is used to receive the first control signal, the first terminal of the third switching transistor Q3 is used to output a second control signal, the second terminal of the third switching transistor Q3 is grounded, and the third switching transistor Q3 conducts when the first control signal is a low-level signal.

[0057] In this embodiment, the first control signal output by the controller 140 includes a high-level signal and a low-level signal. The high-level signal and the low-level signal are respectively used to control the first switching transistor Q1 to be in the on state and the off state. Therefore, the controller 140 can adjust the output duration of the high-level signal and the low-level signal, control the on and off duration of the first switching transistor Q1, thereby adjust the duty cycle of the signal output by the drive circuit 160, and further adjust the voltage of the voltage drive signal output by the drive power supply 100.

[0058] Specifically, the push-pull circuit 120 includes a second switching transistor Q2 and a third switching transistor Q3. The second switching transistor Q2 conducts when its control terminal receives a high-level signal, and the third switching transistor Q3 conducts when its control terminal receives a low-level signal. The control terminals of the second switching transistor Q2 and the third switching transistor Q3 are both used to receive control signals from the controller 140.

[0059] Exemplarily, the voltage of the power supply V is 12V, and the first switching transistor Q1 can be selected as a MOS transistor. When the first control signal output by the controller 140 is a high-level signal, the second switching transistor Q2 conducts. At this time, the voltage across the G and S poles of the first switching transistor Q1 is 12V, the first switching transistor Q1 is in the on state, and the voltage of the first primary winding N1 is 12V, with the voltage being positive at the top and negative at the bottom. When the first control signal output by the controller 140 is a low-level signal, the third switching transistor Q3 conducts. At this time, the voltage across the G and S poles of the first switching transistor Q1 is 0V, the first switching transistor Q1 is in the off state, and the voltage of the first primary winding N1 is 12V, with the voltage being negative at the top and positive at the bottom.

[0060] Exemplarily, both the second switching transistor Q2 and the third switching transistor Q3 are triodes. The B pole (Base) of the second switching transistor Q2 is the control terminal, the C pole (Collector) of the second switching transistor Q2 is the first terminal, the E pole (Emitter) of the second switching transistor Q2 is the second terminal. The B pole of the third switching transistor Q3 is the control terminal, the E pole of the third switching transistor Q3 is the first terminal, and the C pole of the third switching transistor Q3 is the second terminal.

[0061] In the embodiment of the present application, the second switching transistor Q2 and the third switching transistor Q3 are arranged in the push-pull circuit 120, and the second switching transistor Q2 is set to conduct when receiving a high-level signal, and the third switching transistor Q3 is set to conduct when receiving a low-level signal. The controller 140 can control the on and off states of the first switching transistor Q1 by selecting to transmit a high-level signal or a low-level signal to the push-pull circuit 120, enabling the push-pull circuit 120 to amplify the received first control signal, and improving the stability and timeliness of controlling the on and off states of the first switching transistor Q1.

[0062] In some embodiments, optionally, the push-pull circuit 120 further includes: a first resistor R1, a first end of the first resistor R1 is connected to the output end of the controller 140, and a second end of the first resistor R1 is connected to the control ends of the second switching transistor Q2 and the third switching transistor Q3; a second resistor R2, a first end of the second resistor R2 is connected to the second end of the second switching transistor Q2 and the first end of the third switching transistor Q3, and a second end of the second resistor R2 is connected to the control end of the first switching transistor Q1.

[0063] In this embodiment, both the first resistor R1 and the second resistor R2 are current-limiting resistors. Specifically, the first resistor R1 is disposed between the output end of the controller 140 and the control ends of the second switching transistor Q2 and the third switching transistor Q3. The first resistor R1 can limit the current of the first control signal output by the controller 140, avoiding damage to the second switching transistor Q2 or the third switching transistor Q3 caused by excessive current of the first control signal. The second resistor R2 is disposed between the second end of the second switching transistor Q2, the first end of the third switching transistor Q3 and the control end of the first switching transistor Q1. The second resistor R2 can limit the current of the second control signal output by the second switching transistor Q2 or the third switching transistor Q3, avoiding damage to the first switching transistor Q1 caused by excessive current of the second control signal.

[0064] In the embodiments of the present application, the first resistor R1 and the second resistor R2 are respectively disposed at the input end and the output end of the push-pull circuit 120. The first resistor R1 limits the current of the first control signal received by the push-pull circuit 120, and the first resistor R1 limits the current of the second control signal output by the push-pull circuit 120, so as to be able to limit the current of the second switching transistor Q2 and the third switching transistor Q3 inside the push-pull circuit 120, and the first switching transistor Q1 outside the push-pull circuit 120, improving the stability and safety of the operation of the drive power supply 100.

[0065] As Figures 1 to 3 shown, in some embodiments, optionally, the output circuit 130 includes: a charge and discharge module 131, connected to the secondary winding N2; a rectification module 132, connected between the charge and discharge module 131 and the secondary winding N2; a voltage regulation module 133, a first end of the voltage regulation module 133 is connected to the output end of the charge and discharge module 131, and a second end of the voltage regulation module 133 is used to output a voltage drive signal.

[0066] In the embodiments of the present application, the output circuit 130 includes a charge and discharge module 131, a rectification module 132, and a voltage regulation module 133. The charge and discharge module 131 can store energy when the secondary winding N2 is powered on, and output a voltage drive signal when the secondary winding N2 is powered off. The rectification module 132 is located between the charge and discharge circuit and the output end of the secondary winding N2, and operates when the transformer 110 transfers energy to rectify the voltage signal output by the secondary winding N2, so that the voltage signals transmitted to the charge and discharge module 131 are all rectified DC voltage signals. The voltage regulation module 133 is connected to the output end of the charge and discharge module 131. The voltage regulation module 133 can regulate the output voltage drive signal to improve the voltage accuracy of the output voltage drive signal.

[0067] As Figures 1 to 3 shown, in some embodiments, optionally, the rectification module 132 includes: a first diode D1. The first end of the first diode D1 is connected to the first end of the secondary winding N2. The second end of the secondary winding N2 is grounded. The second end of the first diode D1 is connected to the voltage regulation module 133. The first end to the second end of the first diode D1 conducts unidirectionally.

[0068] In this embodiment, the rectification module 132 includes a first diode D1. The first diode D1 is a rectifying diode. The first diode D1 is located between the first end of the secondary winding N2 and the charge and discharge module 131, and the second end of the secondary winding N2 is grounded. The first diode D1 enables the voltage signal to conduct unidirectionally in the direction from the secondary winding N2 to the charge and discharge module 131.

[0069] Specifically, when the first switch tube Q1 is turned on, the transformer 110 transfers energy. At this time, the first diode D1 in the rectification module 132 is turned on. The voltage signal output by the secondary winding N2 of the transformer 110 is output as a voltage drive signal through the output circuit 130 to supply power to an external load, and at the same time, the charge and discharge module 131 is charged, thereby completing the energy transfer between the primary and secondary sides of the transformer 110, and realizing the electrical isolation between the primary and secondary sides of the driving power supply 100 and the transformer 110. When the first switch tube Q1 is turned off, the transformer 110 stops transferring energy. At this time, the first diode D1 inside the rectification module 132 is reversely cut off. At this time, the charge and discharge module 131 outputs a voltage drive signal to supply power to an external load.

[0070] In the embodiments of the present application, by setting the unidirectionally conducting first diode D1 in the rectification module 132, the voltage signal conducts unidirectionally in the direction from the secondary winding N2 to the charge and discharge module 131, further improving the voltage stability of the voltage drive signal output by the driving power supply 100.

[0071] As Figures 1 to 3As shown, in some embodiments, optionally, the voltage driving signal includes a positive voltage driving signal and a negative voltage driving signal, the charging and discharging module 131 includes a first capacitor C1, and the voltage stabilizing module 133 includes:

[0072] A positive voltage stabilizing unit 1331, wherein the first end of the positive voltage stabilizing unit 1331 is connected to the first end of the first capacitor C1, and the second end of the positive voltage stabilizing unit 1331 is used to output a positive voltage driving signal; a negative voltage stabilizing unit 1332, wherein the first end of the negative voltage stabilizing unit 1332 is connected to the second end of the first capacitor C1, and the second end of the negative voltage stabilizing unit 1332 is used to output a negative voltage driving signal.

[0073] In this embodiment, the charge and discharge module 131 includes a first capacitor C1 for energy storage. When the transformer 110 transmits energy, the electric energy output by the secondary winding N2 can be stored in the first capacitor C1. When the transformer 110 stops transmitting energy, the energy stored in the first capacitor C1 can be output to the outside, so that the driving power supply 100 maintains the output voltage driving signal.

[0074] In this embodiment, the voltage stabilizing module 133 includes a positive voltage stabilizing unit 1331 and a negative voltage stabilizing unit 1332. The voltage driving signal output by the driving power supply 100 includes a positive voltage driving signal and a negative voltage driving signal. The positive voltage driving signal and the negative voltage driving signal are output through two different ports. The positive voltage stabilizing unit 1331 is set to stabilize the positive voltage driving signal output from the positive voltage output port, and the negative voltage stabilizing unit 1332 is set to stabilize the negative voltage driving signal output from the negative voltage output port, thereby ensuring the voltage stability of the voltage driving signal output by the driving power supply 100.

[0075] Figure 1 and Figure 2 The two ports Power1 and Power-n are both positive pressure output ports, the two ports Power-1-mid and Power-n-mid are both negative pressure output ports, and the two ports Power-1-GND and Power-n-GND are both ground terminals GND ports.

[0076] In an embodiment of the present application, by setting a positive voltage stabilizing unit 1331 and a negative voltage stabilizing unit 1332 in the voltage stabilizing module 133, the voltage stabilizing module 133 can stabilize the positive voltage driving signal and the negative voltage driving signal output by the driving power supply 100, thereby further improving the voltage stability of the voltage driving signal output by the driving power supply 100.

[0077] like Figures 1 to 3As shown, in some embodiments, optionally, the positive voltage regulator unit 1331 includes: a second capacitor C2, a first end of the second capacitor C2 is connected to a first end of the first capacitor C1; a fourth switching transistor Q4, a first end of the fourth switching transistor Q4 is connected to the first end of the second capacitor C2, and a second end of the fourth switching transistor Q4 is used to output a positive voltage driving signal; a shunt regulator U1, a cathode of the shunt regulator U1 is connected to a control end of the fourth switching transistor Q4, and an anode of the shunt regulator U1 is connected to a second end of the second capacitor C2; a resistor sampling component 1333, a first end of the resistor sampling component 1333 is connected to the second end of the fourth switching transistor Q4, a second end of the resistor sampling component 1333 is connected to the second end of the second capacitor C2, and an output end of the resistor sampling component 1333 is connected to a reference end of the shunt regulator U1.

[0078] In this embodiment, the positive voltage regulator unit 1331 includes a second capacitor C2, a fourth switching transistor Q4, a shunt regulator U1, and a resistor sampling component 1333. The second capacitor C2 can play a filtering role in the positive voltage regulator unit 1331, and the positive voltage regulator unit 1331 realizes the voltage stabilizing effect on the positive voltage driving signal through the fourth switching transistor Q4 and the shunt regulator U1.

[0079] Exemplarily, the shunt regulator U1 is selected as a TL431 regulator, and the fourth switching transistor Q4 is selected as a triode.

[0080] Specifically, the anode of the shunt regulator U1 is connected to the second capacitor C2, the cathode of the shunt regulator U1 is connected to the control end of the fourth switching transistor Q4, the reference end of the shunt regulator U1 is connected to the output end of the resistor sampling component 1333, the resistor sampling component 1333 can transmit the sampled voltage into the shunt regulator U1, and the shunt regulator U1 compares the sampled voltage collected with the reference voltage stored internally, so as to control the on-off state of the fourth switching transistor Q4, so as to achieve the purpose of voltage stabilization. Among them, when the sampled voltage received at the reference end of the shunt regulator U1 is lower than the reference voltage, the error amplifier inside the shunt regulator U1 is turned off, and the cathode current is extremely small, and the shunt regulator U1 is in an off state. When the sampled voltage received at the reference end of the shunt regulator U1 is higher than the reference voltage value, the error amplifier is activated, driving the internal transistor to conduct, and the cathode current increases, reducing the voltage by means of shunting.

[0081] Exemplarily, the positive voltage regulator unit 1331 further includes a fifth resistor R5, a first end of the fifth resistor R5 is connected to the first end of the fourth switching transistor Q4, and a second end of the fifth resistor R5 is connected to the control end of the fourth switching transistor Q4. The fifth resistor R5 can play a role in current limiting and protecting the fourth switching transistor Q4.

[0082] In the embodiments of the present application, by arranging a shunt regulator U1 and a fourth switching transistor Q4 in the positive voltage regulation unit 1331, the cooperation of the fourth switching transistor Q4 and the shunt regulator U1 can regulate the positive voltage drive signal, improving the voltage stability of the positive voltage drive signal.

[0083] As Figures 1 to 3 shown, in some embodiments, optionally, the resistance sampling component 1333 includes: a third resistor R3, the first end of the third resistor R3 is connected to the second end of the fourth switching transistor Q4, and the second end of the third resistor R3 is connected to the reference terminal of the shunt regulator U1; a fourth resistor R4, the first end of the fourth resistor R4 is connected to the reference terminal of the shunt regulator U1, and the second end of the fourth resistor R4 is connected to the second end of the second capacitor C2.

[0084] In the embodiments of the present application, the resistance sampling component 1333 includes a third resistor R3 and a fourth resistor R4 connected in series. The series-connected third resistor R3 and fourth resistor R4 are connected in parallel with the second capacitor C2, and can sample the positive voltage drive signal. The common terminal of the third resistor R3 and the fourth resistor R4 is used as the output terminal of the sampling voltage signal and is connected to the reference terminal of the shunt regulator U1, so as to transmit the voltage sampling signal to the shunt regulator U1, enabling the shunt regulator U1 to cooperate with the fourth switching transistor Q4 to regulate the positive voltage drive signal output by the drive power supply 100.

[0085] As Figures 1 to 3 shown, in some embodiments, optionally, the positive voltage regulation unit 1331 further includes: a third capacitor C3, the first end of the third capacitor C3 is connected to the first end of the second capacitor C2, and the second end of the third capacitor C3 is connected to the second end of the second capacitor C2; a fourth capacitor C4, the first end of the fourth capacitor C4 is connected to the first end of the second capacitor C2, and the second end of the fourth capacitor C4 is connected to the second end of the second capacitor C2.

[0086] In the embodiments of the present application, the positive voltage regulation unit 1331 is also provided with a third capacitor C3 and a fourth capacitor C4 connected in parallel, and both the third capacitor C3 and the fourth capacitor C4 are connected in parallel with the second capacitor C2, and the third capacitor C3 and the fourth capacitor C4 are located at the rear end of the shunt regulator U1 and the fourth switching transistor Q4. The third capacitor C3 and the fourth capacitor C4 can store energy and filter out high-frequency ripples, further improving the stability of the positive voltage drive signal output by the positive voltage regulation unit 1331.

[0087] As Figures 1 to 3As shown, in some embodiments, optionally, the negative voltage stabilizing unit 1332 includes: a fifth capacitor C5, a first end of the fifth capacitor C5 is connected to a second end of the first capacitor C1; a voltage stabilizing diode ZD, a first end of the voltage stabilizing diode ZD is connected to the first end of the fifth capacitor C5, a second end of the voltage stabilizing diode ZD is connected to the second end of the fifth capacitor C5, and the voltage stabilizing diode ZD conducts unidirectionally from the first end to the second end; a sixth capacitor C6, a first end of the sixth capacitor C6 is connected to the first end of the fifth capacitor C5, and a second end of the sixth capacitor C6 is connected to the second end of the fifth capacitor C5; a seventh capacitor C7, a first end of the seventh capacitor C7 is connected to the first end of the fifth capacitor C5, and a second end of the seventh capacitor C7 is connected to the second end of the fifth capacitor C5.

[0088] In this embodiment, a fifth capacitor C5 and a voltage stabilizing diode ZD are provided in the negative voltage stabilizing unit 1332. The fifth capacitor C5 can play a filtering role in the negative voltage stabilizing unit 1332, and the negative voltage driving signal output by the driving power supply 100 is stabilized by the clamping voltage of the voltage stabilizing diode ZD. Specifically, the voltage stabilizing diode ZD is selected as a Zener diode. The voltage stabilizing diode ZD is arranged in parallel with the fifth capacitor C5, and the voltage stabilizing diode ZD conducts unidirectionally from the first end to the second end. When the input voltage increases, the part exceeding the Zener voltage of the voltage stabilizing diode ZD will pass through the current path of the Zener diode performance, and the output voltage will be limited to the Zener voltage.

[0089] In this embodiment, a sixth capacitor C6 and a seventh capacitor C7 in parallel are also provided in the negative voltage stabilizing unit 1332. Both the sixth capacitor C6 and the seventh capacitor C7 are in parallel with the fifth capacitor C5, and the sixth capacitor C6 and the seventh capacitor C7 are located at the rear end of the voltage stabilizing diode ZD. The sixth capacitor C6 and the seventh capacitor C7 can store energy and filter high-frequency ripples, further improving the stability of the negative voltage driving signal output by the negative voltage stabilizing unit 1332.

[0090] In the embodiment of the present application, by providing a voltage stabilizing diode ZD in the negative voltage stabilizing unit 1332, the negative voltage driving signal output by the driving power supply 100 can be stabilized by the clamping voltage of the voltage stabilizing diode ZD, and a sixth capacitor C6 and a seventh capacitor C7 in parallel are provided at the rear end of the voltage stabilizing diode ZD, which can further improve the stability of the negative voltage driving signal output by the negative voltage stabilizing unit 1332.

[0091] As Figures 1 to 3 shown, in some embodiments, optionally, the driving power supply 100 further includes: a second primary winding N3, a first end of the second primary winding N3 is connected to the power supply V; a second diode D2, a first end of the second diode D2 is grounded, and a second end of the second diode D2 is connected to a second end of the second primary winding N3.

[0092] In this embodiment, the driving power supply 100 further includes a reset circuit 150 for resetting the transformer 110. The reset circuit 150 includes a second primary winding N3 and a second diode D2. Two ends of the second primary winding N3 are respectively connected to the ground terminal GND and the power supply V. The second diode D2 is connected between the second primary winding N3 and the ground terminal GND, and the second diode D2 conducts unidirectionally in the direction from the ground terminal GND to the second primary winding N3.

[0093] Specifically, when the first switching transistor Q1 is turned off, the transformer 110 stops transmitting energy, and the reset circuit 150 starts to work. Since there is inductance in the transformer 110 and the peak current cannot change suddenly, the energy stored in the transformer 110 needs to be released. When the first switching transistor Q1 is turned off, the voltage at the first primary winding N1 reverses, and the second diode D2 conducts to release energy, thereby completing the energy reset of the transformer 110.

[0094] In the embodiment of the present application, a reset circuit 150 is provided on the primary side of the transformer 110 of the driving power supply 100, and a second primary winding N3 and a second unidirectionally conductive diode D2 are provided in the reset circuit 150, so that when the transformer 110 stops transmitting energy, the energy inside the transformer 110 can be reset in time through the reset circuit 150.

[0095] As Figure 1 and Figure 2 shown, in some embodiments, optionally, the number of secondary windings N2 is at least two, the number of output circuits 130 is at least two, and the output circuits 130 are arranged in one-to-one correspondence with the secondary windings N2.

[0096] In the embodiment of the present application, the number of secondary windings N2 can be multiple, and each secondary winding N2 corresponds to an output circuit 130. The circuit structures of the output circuits 130 corresponding to different secondary windings N2 are the same and have the same functions, so that the driving power supply 100 can have multiple output ports to synchronously drive multiple loads.

[0097] As Figure 1 shown, exemplarily, the number of secondary windings N2 is 1. As Figure 2 shown, the number of secondary windings N2 is n, where the n secondary windings N2 include a first secondary sub-winding N21,... a nth secondary sub-winding N2n, then the number of output circuits 130 is also n, and the n output circuits 130 are connected in one-to-one correspondence with the n secondary windings N2, and the circuit structures in the n output circuits 130 are the same, ensuring that each output circuit 130 can stably output.

[0098] The following takes the first secondary sub-winding N21 and the nth secondary sub-winding N2n in n secondary windings N2 as an example for illustration: The circuit structures of the output circuit 130 connected to the first secondary sub-winding N21 and the output circuit 130 connected to the nth secondary sub-winding N2n are the same. The output circuits 130 connected to the first secondary sub-winding N21 and the nth secondary sub-winding N2n both include a rectification module 132, a voltage regulation module 133, and a charge and discharge module 131. The charge and discharge modules 131 in the output circuits 130 connected to the first secondary sub-winding N21 and the nth secondary sub-winding N2n both include a first capacitor C1, the rectification modules 132 both include a first diode D1, the voltage regulation modules 133 both include a positive voltage regulation unit 1331 and a negative voltage regulation unit 1332, and the positive voltage regulation unit 1331 both includes a second capacitor C2, a fourth switch tube Q4, a fifth capacitor C5, a shunt regulator U1, a third capacitor C3, a fourth capacitor C4, and a resistor sampling component including a third resistor R3 and a fourth resistor R4. The negative voltage regulation unit 1332 both includes a fifth capacitor C5, a voltage stabilizing diode ZD, a sixth capacitor C6, and a seventh capacitor C7. Among them, Power-1 is the positive voltage output port of the output circuit 130 corresponding to the first secondary sub-winding N21, Power-n is the positive voltage output port of the output circuit 130 corresponding to the nth secondary sub-winding N2n, Power-1-mid is the negative voltage output port of the output circuit 130 corresponding to the first secondary sub-winding N21, Power-n-mid is the negative voltage output port of the output circuit 130 corresponding to the nth secondary sub-winding N2n, Power-1-GND is the grounding port of the output circuit 130 corresponding to the first secondary sub-winding N21, and Power-n-GND is the grounding port of the output circuit 130 corresponding to the nth secondary sub-winding N2n.

[0099] As Figure 1 and Figure 2 shown, in some embodiments, optionally, the drive power supply 100 further includes: an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10. The eighth capacitor C8, the ninth capacitor C9, and the tenth capacitor C10 are connected in parallel between the power supply V and the ground terminal GND. The parallel-connected eighth capacitor C8, ninth capacitor C9, and tenth capacitor C10 can play the roles of energy storage and high-frequency filtering.

[0100] In an embodiment according to the present application, Figure 4 shows a structural block diagram of a power device provided in some embodiments of the present application, as Figure 4As shown, the power device 200 includes: a load 202; the drive power supply 100 in any of the above embodiments, and the output circuit of the drive power supply 100 is connected to the load 202 for outputting a voltage drive signal to the load 202. Since the drive power supply 100 is the drive power supply in any of the above embodiments, it has all the beneficial effects of the drive power supply in any of the above embodiments, which will not be elaborated here.

[0101] Exemplarily, the load 202 may be a silicon carbide power device.

[0102] In some embodiments, optionally, the power device 200 includes any one of the following: an inverter device, a charging pile, and an energy storage device.

[0103] It should be clear that in the claims, the specification, and the drawings of the present application, the term "a plurality" means two or more, unless otherwise explicitly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for more conveniently describing the present application and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation, be constructed and operated in the specific orientation. Therefore, these descriptions should not be construed as limiting the present application; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances of the above data.

[0104] In the claims, the specification, and the drawings of the present application, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, the specification, and the drawings of the present application, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0105] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A driving power supply, characterized in that: include: A transformer, the transformer comprising a first primary winding and a secondary winding, wherein a first end of the first primary winding is connected to a power source; A push-pull circuit, wherein an input end of the push-pull circuit is used to receive a first control signal transmitted by a controller, and an output end of the push-pull circuit is used to output a second control signal; a first switch tube, wherein a control end of the first switch tube is connected to an output end of the push-pull circuit, a first end of the first switch tube is connected to a second end of the first primary winding, a second end of the first switch tube is grounded, and the first switch tube switches an on-off state in response to the second control signal; An output circuit is connected to the secondary winding, and is used to output a voltage drive signal.

2. The driving power supply according to claim 1, characterized in that: The first control signal includes a high level signal and a low level signal, the high level signal is used to drive the first switch tube to be in an on state, and the low level signal is used to drive the first switch tube to be in an off state; The push-pull circuit comprises: a second switch tube, wherein the control end of the second switch tube is used to receive the first control signal, the first end of the second switch tube is connected to the power supply, the second end of the second switch tube is used to output the second control signal, and when the first control signal is the high level signal, the second switch tube is turned on; A third switch tube, wherein the control end of the third switch tube is used to receive the first control signal, the first end of the third switch tube is used to output the second control signal, the second end of the third switch tube is grounded, and when the first control signal is a low level signal, the third switch tube is turned on.

3. The driving power supply according to claim 2, characterized in that: The push-pull circuit further includes: A first resistor, wherein a first end of the first resistor is connected to the output end of the controller, and a second end of the first resistor is connected to the control end of the second switch tube and the control end of the third switch tube; A second resistor, wherein a first end of the second resistor is connected to a second end of the second switch tube and a first end of the third switch tube, and a second end of the second resistor is connected to a control end of the first switch tube.

4. The driving power supply according to any one of claims 1 to 3, characterized in that: The output circuit comprises: A charging and discharging module connected to the secondary winding; A rectifier module, connected between the charging and discharging module and the secondary winding; A voltage stabilizing module, wherein a first end of the voltage stabilizing module is connected to an output end of the charging and discharging module, and a second end of the voltage stabilizing module is used to output the voltage driving signal.

5. The driving power supply according to claim 4, characterized in that: The rectifier module comprises: A first diode, wherein a first end of the first diode is connected to a first end of the secondary winding, a second end of the secondary winding is grounded, a second end of the first diode is connected to the voltage stabilizing module, and the first end to the second end of the first diode is unidirectionally conductive.

6. The driving power supply according to claim 4, characterized in that: The voltage driving signal includes a positive voltage driving signal and a negative voltage driving signal, the charging and discharging module includes a first capacitor, and the voltage stabilizing module includes: a positive voltage stabilizing unit, wherein a first end of the positive voltage stabilizing unit is connected to a first end of the first capacitor, and a second end of the positive voltage stabilizing unit is used to output the positive voltage driving signal; A negative voltage stabilizing unit, wherein a first end of the negative voltage stabilizing unit is connected to a second end of the first capacitor, and a second end of the negative voltage stabilizing unit is used to output the negative voltage driving signal.

7. The driving power supply according to claim 6, characterized in that: The positive pressure stabilizing unit comprises: a second capacitor, a first end of the second capacitor being connected to the first end of the first capacitor; a fourth switch tube, wherein a first end of the fourth switch tube is connected to a first end of the second capacitor, and a second end of the fourth switch tube is used to output the positive voltage driving signal; A shunt regulator, wherein a cathode of the shunt regulator is connected to the control end of the fourth switch tube, and an anode of the shunt regulator is connected to the second end of the second capacitor; A resistance sampling component, wherein the first end of the resistance sampling component is connected to the second end of the fourth switch tube, the second end of the resistance sampling component is connected to the second end of the second capacitor, and the output end of the resistance sampling component is connected to the reference end of the parallel regulator.

8. The driving power supply according to claim 7, characterized in that: The resistance sampling component comprises: a third resistor, wherein a first end of the third resistor is connected to a second end of the fourth switch tube, and a second end of the third resistor is connected to a reference end of the parallel regulator; A fourth resistor, wherein a first end of the fourth resistor is connected to the reference end of the shunt regulator, and a second end of the fourth resistor is connected to the second end of the second capacitor.

9. The driving power supply according to claim 7, characterized in that: The positive voltage stabilizing unit further comprises: a third capacitor, wherein a first end of the third capacitor is connected to the first end of the second capacitor, and a second end of the third capacitor is connected to the second end of the second capacitor; A fourth capacitor, wherein a first end of the fourth capacitor is connected to the first end of the second capacitor, and a second end of the fourth capacitor is connected to the second end of the second capacitor.

10. The driving power supply according to claim 6, characterized in that: The negative pressure stabilizing unit comprises: a fifth capacitor, a first end of the fifth capacitor being connected to the second end of the first capacitor; A voltage regulator tube, wherein a first end of the voltage regulator tube is connected to a first end of the fifth capacitor, a second end of the voltage regulator tube is connected to a second end of the fifth capacitor, and the first end to the second end of the voltage regulator tube is unidirectionally conductive; a sixth capacitor, wherein a first end of the sixth capacitor is connected to the first end of the fifth capacitor, and a second end of the sixth capacitor is connected to the second end of the fifth capacitor; A seventh capacitor, wherein a first end of the seventh capacitor is connected to the first end of the fifth capacitor, and a second end of the seventh capacitor is connected to the second end of the fifth capacitor.

11. The driving power supply according to any one of claims 1 to 3, characterized in that: Also includes: a second primary winding, wherein a first end of the second primary winding is connected to the power supply; A second diode, wherein a first end of the second diode is grounded, and a second end of the second diode is connected to a second end of the second primary winding.

12. The driving power supply according to any one of claims 1 to 3, characterized in that: The number of the secondary windings is at least two, the number of the output circuits is at least two, and the output circuits are arranged in a one-to-one correspondence with the secondary windings.

13. An electric power device, characterized in that: include: load; The driving power supply according to any one of claims 1 to 12, wherein an output circuit of the driving power supply is connected to the load.

14. The electric power equipment according to claim 13, characterized in that: The electrical equipment includes any one of the following: Inverter equipment, charging piles, and energy storage equipment.

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