A power module driving circuit and controller

Abstract

The utility model relates to power module drive technical field discloses a kind of power module drive circuit and controller, power module drive circuit includes: CompactRIO module board card and is arranged on printed circuit board isolation drive circuit, power supply circuit, first low-voltage electrical interface and second low-voltage electrical interface;The input end of isolation drive circuit is connected by first low-voltage electrical interface and CompactRIO module board card, output end and controlled power module are connected;The input end of power supply circuit is connected by second low-voltage electrical interface and external power supply, the first output end of power supply circuit and isolation drive circuit are connected, for converting the voltage of external power supply into the working voltage of isolation drive circuit.The utility model does not need additional design control board, effectively reduce the transmission energy loss of drive board.

Description

Technical Field

[0001] This utility model relates to the field of power module drive technology, and in particular to a power module drive circuit and controller. Background Technology

[0002] In the rapid development of power electronics technology, silicon carbide power modules are becoming an important force driving industry progress with their superior performance and broad application prospects, bringing unprecedented efficiency improvements and performance optimizations to power conversion systems.

[0003] Silicon carbide (SiC) power modules are power modules that use silicon carbide semiconductors as switches. Driving and testing SiC power modules is a crucial step in ensuring their performance and reliability. The driver board must not only drive the SiC power module but also support testing of certain characteristics, such as double-pulse testing, evaluating the switching characteristics of the SiC power module, the reverse recovery characteristics of the body diode, and assessing the suitability of the drive parameter design. The driver board needs to be hollowed out in the middle to facilitate chip temperature measurement of the SiC module. The driver board can also drive the SiC power devices through power cycling for aging tests. Furthermore, the driver board must also implement protection functions for the power module.

[0004] Since the driver board needs to perform functions such as driving, testing, and protecting the power module, a corresponding control board is required to control the driver board. However, adding a control board will increase the transmission loss of the driver board. Utility Model Content

[0005] In view of this, the present invention provides a power module drive circuit and controller to solve or partially solve the technical problem of increased transmission loss of the drive board caused by adding a control board in the prior art.

[0006] The technical solution proposed by this utility model is as follows: The first aspect of this utility model provides a power module drive circuit, including: a CompactRIO module board and an isolation drive circuit, a power supply circuit, a first low-voltage electrical interface, and a second low-voltage electrical interface disposed on a printed circuit board; the input terminal of the isolation drive circuit is connected to the CompactRIO module board through the first low-voltage electrical interface, and the output terminal of the isolation drive circuit is connected to the controlled power module; the input terminal of the power supply circuit is connected to an external power supply through the second low-voltage electrical interface, and the first output terminal of the power supply circuit is connected to the isolation drive circuit, for converting the voltage of the external power supply into the operating voltage of the isolation drive circuit.

[0007] Optionally, the power module drive circuit further includes a signal amplification circuit, the input terminal of which is connected to the first low-voltage electrical interface, the output terminal of which is connected to the isolation drive circuit, and the power supply terminal of which is connected to the second output terminal of the power supply circuit.

[0008] Optionally, the power supply circuit includes a power management circuit and a pre-drive isolated power supply. The input terminal of the power management circuit is connected to an external power supply through a second low-voltage electrical interface. The first output terminal of the power management circuit is connected to the input terminal of the pre-drive isolated power supply. The output terminal of the pre-drive isolated power supply is connected to the isolation drive circuit. The power management circuit is used to convert the voltage of the external power supply into an intermediate voltage. The pre-drive isolated power supply is used to convert the intermediate voltage into the operating voltage of the isolation drive circuit. The output terminal of the pre-drive isolated power supply is the first output terminal of the power supply circuit.

[0009] Optionally, the pre-drive isolation power supply includes an upper-bridge pre-drive power supply circuit and a lower-bridge pre-drive power supply circuit. The upper-bridge pre-drive power supply circuit and / or the lower-bridge pre-drive power supply circuit include a pre-drive power chip driver circuit, a first transformer, and a rectifier circuit. The input terminal of the pre-drive power chip driver circuit is connected to the first output terminal of the power management circuit. The output terminal of the pre-drive power chip driver circuit is connected to the primary winding of the first transformer. The secondary winding of the first transformer is connected to the input terminal of the rectifier circuit. The output terminal of the rectifier circuit is connected to the isolation drive circuit.

[0010] Optionally, the isolation drive circuit includes several single-phase upper bridge isolation drive circuits and several single-phase lower bridge isolation drive circuits, and both the single-phase upper bridge isolation drive circuit and the single-phase lower bridge isolation drive circuit include an isolation side and a non-isolation side.

[0011] Optionally, the printed circuit board has a slot between the isolated side and the non-isolated side of the single-phase upper bridge isolation drive circuit; and / or, the printed circuit board has a slot between the isolated side and the non-isolated side of the single-phase lower bridge isolation drive circuit.

[0012] Optionally, the power module drive circuit also includes a fault display circuit, the input terminal of which is connected to the isolation drive circuit, and the power supply terminal of which is connected to the third output terminal of the power supply circuit.

[0013] Optionally, the fault display circuit includes an upper bridge fault display circuit and a lower bridge fault display circuit.

[0014] Optionally, a through-hole is provided in the middle of the printed circuit board, and the isolation drive circuit, power supply circuit, first low-voltage electrical interface and second low-voltage electrical interface are arranged around the through-hole.

[0015] The second aspect of this utility model provides a power module drive controller, including a power module drive circuit as described in any of the first aspects of this utility model.

[0016] This utility model has the following beneficial effects: The power module drive circuit and controller of this utility model connect the isolation drive circuit and the CompactRIO module board through a first low-voltage electrical interface, and connect the power supply circuit and external power supply through a second low-voltage electrical interface, thereby providing the working voltage for the isolation drive circuit. When the isolation drive circuit is working, it obtains control signals from the CompactRIO module board to drive and control the power module. There is no need to design an additional control board, avoiding the problem of increased transmission loss of the drive board caused by adding a control board, and effectively reducing the transmission energy loss of the drive board.

[0017] Furthermore, the power module drive circuit and controller of this utility model can reduce the development cost of the control board, reduce the structural complexity, more accurately measure the heat information of the power module, perform fault monitoring of the power module, rationalize the device layout, and ensure that the entire system can drive and control the power devices normally under a 1000V high voltage system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a circuit block diagram of a power module driving circuit in one embodiment of the present invention; Figure 2 This is a circuit block diagram of another power module drive circuit in an embodiment of this utility model; Figure 3 This is a schematic diagram of the layout of the printed circuit board in an embodiment of this utility model; Explanation of reference numerals in the attached figures: 1. CompactRIO module board; 2. Isolation drive circuit; 21. U-phase upper bridge drive circuit; 22. V-phase upper bridge drive circuit; 23. W-phase upper bridge drive circuit; 24. U-phase lower bridge drive circuit; 25. V-phase lower bridge drive circuit; 26. W-phase lower bridge drive circuit; 3. Power supply circuit; 31. Power management circuit; 32. Pre-drive isolated power supply; 321. Upper bridge pre-drive power supply circuit; 322. Lower bridge pre-drive power supply circuit; 4. First low-voltage electrical interface; 5. Second low-voltage electrical interface; 6. Signal amplification circuit; 7. Fault display circuit; 71. Upper bridge fault display circuit; 72. Lower bridge fault display circuit; 8. Slot; 9. Through hole. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Currently, because the driver board requires a matching control board to control it, this not only increases the overall circuit board cost but also the design and development cost of the control board, increases transmission loss, and imposes certain limitations on driving functionality. In view of this, this utility model proposes a power module driver circuit and controller.

[0025] like Figure 1 and Figure 2 As shown, the power module drive circuit of this utility model embodiment includes: The CompactRIO module board 1 and the isolation drive circuit 2, power supply circuit 3, first low-voltage electrical interface 4 and second low-voltage electrical interface 5 are mounted on the printed circuit board. The input terminal of the isolation drive circuit 2 is connected to the CompactRIO module board 1 through the first low-voltage electrical interface 4, and the output terminal of the isolation drive circuit 2 is connected to the controlled power module. The input terminal of the power supply circuit 3 is connected to an external power supply through the second low-voltage electrical interface 5, and the first output terminal of the power supply circuit 3 is connected to the isolation drive circuit 2 to convert the voltage of the external power supply into the operating voltage of the isolation drive circuit 2.

[0026] Specifically, the CompactRIO module board 1 adopts a bidirectional digital module board based on NI-9401, and the first low-voltage electrical interface 4 adopts a DR-25 serial low-voltage connector. The CompactRIO module board 1 and the isolation drive circuit 2 realize the board-end input of control signals through the first low-voltage electrical interface 4.

[0027] The second low-voltage electrical interface 5 is a general power interface. An external power source supplies power to the power circuit 3 through the second low-voltage electrical interface 5. The power circuit 3 includes a step-down circuit that converts the voltage of the external power source into the operating voltage of the isolation drive circuit 2, thereby providing power to the isolation drive circuit 2.

[0028] In one example, the controlled power module is a silicon carbide power module, comprising six bridge arms. A control signal is input to an isolated drive circuit 2 via a CompactRIO module board 1, which then drives the power module based on this control signal.

[0029] The power module drive circuit and controller of this embodiment connect the isolated drive circuit 2 and the CompactRIO module board 1 through a first low-voltage electrical interface 4, and connect the power supply circuit 3 and an external power supply through a second low-voltage electrical interface 5, thereby providing operating voltage for the isolated drive circuit 2. During operation, the isolated drive circuit 2 obtains control signals from the CompactRIO module board 1 to drive and control the power module. This invention eliminates the need for an additional control board, avoiding the increased transmission loss of the drive board caused by adding a control board, and effectively reducing the transmission energy loss of the drive board. Furthermore, this invention can reduce the development cost of the control board and lower the structural complexity of the drive board.

[0030] In some embodiments, the power module drive circuit further includes a signal amplification circuit 6, the input terminal of which is connected to the first low-voltage electrical interface 4, the output terminal of which is connected to the isolation drive circuit 2, and the power supply terminal of the signal amplification circuit 6 is connected to the second output terminal of the power supply circuit 3.

[0031] For example, the signal amplification circuit 6 adopts a common-emitter amplifier circuit or a common-collector amplifier circuit.

[0032] After the CompactRIO module board 1 receives the control signal, the signal amplification circuit 6 amplifies the control signal. The signal amplification circuit 6 then outputs the amplified control signal to the isolation drive circuit 2.

[0033] Adding a signal amplification circuit 6 can amplify the input signal, ensuring the strength of the control signal and avoiding a decrease in control accuracy due to signal attenuation.

[0034] In some embodiments, the power module drive circuit further includes a fault display circuit 7, the input terminal of which is connected to the isolation drive circuit 2, and the power supply terminal of which is connected to the third output terminal of the power supply circuit 3.

[0035] Specifically, the isolation drive circuit 2 includes a BM6102FV-C drive chip, which has a short-circuit detection function. It can detect whether the power supply (i.e., power circuit 3) of the isolation drive circuit 2 and the voltage of the controlled power module are normal. For example, when a short circuit occurs in the circuit, the drive chip detects the abnormal voltage, generates a fault signal, and reports the fault signal to the fault display circuit 7, thereby realizing the monitoring of the fault and ensuring the safety of the entire circuit.

[0036] In some embodiments, the power supply circuit 3 includes a power management circuit 31 and a pre-drive isolation power supply 32. The input terminal of the power management circuit 31 is connected to an external power supply through a second low-voltage electrical interface 5. The first output terminal of the power management circuit 31 is connected to the input terminal of the pre-drive isolation power supply 32. The output terminal of the pre-drive isolation power supply 32 is connected to the isolation drive circuit 2. The power management circuit 31 is used to convert the voltage of the external power supply into an intermediate voltage. The pre-drive isolation power supply 32 is used to convert the intermediate voltage into the operating voltage of the isolation drive circuit 2. The output terminal of the pre-drive isolation power supply 32 is the first output terminal of the power supply circuit 3.

[0037] Specifically, the power management circuit 31 includes three output terminals, which are connected to the pre-drive isolation power supply 32, the signal amplification circuit 6, and the fault display circuit 7, respectively, to provide power supply voltage to the corresponding circuits.

[0038] For example, the power management circuit 31 uses an isolation transformer with a primary winding and a secondary winding, which can convert an external power supply into a low-voltage intermediate voltage, such as 15V or 30V.

[0039] The pre-drive isolation power supply 32 uses a flyback circuit to further step down the intermediate voltage before outputting it to the isolation drive circuit 2.

[0040] Furthermore, the intermediate voltage is output to the signal amplification circuit 6 and the fault display circuit 7 through the second and third output terminals of the power management circuit 31, respectively. It should be understood that the second and third output terminals of the power management circuit 31 are the second and third output terminals of the power supply circuit 3.

[0041] By splitting the power supply circuit 3 into a power management circuit 31 and a pre-drive isolation power supply 32, the power conversion process becomes more flexible and efficient, better adapting to the requirements of different external power supply voltages and the operating voltage of the isolation drive circuit 2, thus improving the versatility and adaptability of the power supply circuit 3.

[0042] In some embodiments, the isolation drive circuit 2 includes a plurality of single-phase upper bridge isolation drive circuits and a plurality of single-phase lower bridge isolation drive circuits, and both the single-phase upper bridge isolation drive circuit and the single-phase lower bridge isolation drive circuit include an isolation side and a non-isolation side.

[0043] Specifically, the entire isolation drive circuit 2 involves a 3-phase drive, including the drive of 6 bridge arms.

[0044] In one example, the single-phase upper bridge isolation drive circuit includes a U-phase upper bridge drive circuit 21, a V-phase upper bridge drive circuit 22, and a W-phase upper bridge drive circuit 23, and the single-phase lower bridge isolation drive circuit includes a U-phase lower bridge drive circuit 24, a V-phase lower bridge drive circuit 25, and a W-phase lower bridge drive circuit 26. The components of the single-phase upper bridge isolation drive circuit and the single-phase lower bridge isolation drive circuit are arranged symmetrically on the printed circuit board.

[0045] The circuit structures of U-phase upper bridge drive circuit 21, V-phase upper bridge drive circuit 22, W-phase upper bridge drive circuit 23, U-phase lower bridge drive circuit 24, V-phase lower bridge drive circuit 25 and W-phase lower bridge drive circuit 26 are the same, all including an isolation side and a non-isolation side.

[0046] By employing a structure with several single-phase upper bridge isolation drive circuits and several single-phase lower bridge isolation drive circuits, multi-phase control of the power module can be achieved, thereby improving the driving capability and control accuracy of the power module.

[0047] Furthermore, the printed circuit board has a slot 8 between the isolation side and the non-isolation side of the single-phase upper bridge isolation drive circuit; and / or, the printed circuit board has a slot 8 between the isolation side and the non-isolation side of the single-phase lower bridge isolation drive circuit.

[0048] In one example, slots 8 are provided between the isolated and non-isolated sides of the single-phase upper bridge isolation drive circuit and between the isolated and non-isolated sides of the single-phase lower bridge isolation drive circuit.

[0049] To ensure the high-voltage safety performance of the entire power module drive circuit under a 1000V platform, special attention must be paid to the creepage distance between the high-voltage and low-voltage sections during component layout and routing. The slot 8 between the isolated and non-isolated sides ensures sufficient electrical clearance between the high-voltage and low-voltage sides of the drive section, further enhancing isolation and improving circuit safety and stability.

[0050] In some embodiments, the pre-drive isolation power supply 32 includes an upper bridge pre-drive power supply circuit 321 and a lower bridge pre-drive power supply circuit 322. The upper bridge pre-drive power supply circuit 321 and / or the lower bridge pre-drive power supply circuit 322 include a pre-drive power chip driver circuit, a first transformer, and a rectifier circuit. The input terminal of the pre-drive power chip driver circuit is connected to the first output terminal of the power management circuit 31. The output terminal of the pre-drive power chip driver circuit is connected to the primary winding of the first transformer. The secondary winding of the first transformer is connected to the input terminal of the rectifier circuit. The output terminal of the rectifier circuit is connected to the isolation drive circuit 2.

[0051] Specifically, the upper bridge pre-drive power supply circuit 321 and the lower bridge pre-drive power supply circuit 322 have the same structure. Taking the upper bridge pre-drive power supply circuit 321 as an example, it includes a pre-drive power chip driver circuit, a first transformer, and a rectifier circuit. The input terminal (i.e., the power supply terminal) of the pre-drive power chip driver circuit is connected to the first output terminal (i.e., the corresponding positive power supply terminal) of the power management circuit 31. The negative power supply terminal of the power management circuit 31 is connected to the ground terminal of the pre-drive power chip driver circuit. The pre-drive power chip driver circuit generates a drive signal for the first transformer, which is connected to the first transformer through a drive pin. Through the first transformer and the rectifier circuit, a power supply voltage is generated to power the isolation side of the single-phase upper bridge isolation driver circuit and the single-phase lower bridge isolation driver circuit. At the same time, the non-isolated side of the single-phase upper bridge isolation driver circuit and the single-phase lower bridge isolation driver circuit is directly powered through the power management circuit 31.

[0052] The pre-drive isolated power supply 32 of this invention adopts an upper-bridge pre-drive power supply circuit 321 and a lower-bridge pre-drive power supply circuit 322, which can provide independent power supplies for the upper-bridge and lower-bridge isolated drive circuits 2 respectively, avoiding mutual interference between power supplies and improving the stability and reliability of power supply. In addition, the combined use of the pre-drive power chip drive circuit, the first transformer and the rectifier circuit can achieve efficient power conversion and stable voltage output, further improving the performance of the power supply circuit 3.

[0053] Furthermore, the fault display circuit 7 includes an upper bridge fault display circuit 71 and a lower bridge fault display circuit 72. When a fault occurs in the single-phase upper bridge isolation drive circuit or the single-phase lower bridge isolation drive circuit, the drive chip detects the fault and outputs a fault signal to the upper bridge fault display circuit 71 and the lower bridge fault display circuit 72. The upper bridge fault display circuit 71 and the lower bridge fault display circuit 72 display the fault information of the single-phase upper bridge isolation drive circuit and the single-phase lower bridge isolation drive circuit, respectively, which can quickly locate whether the fault is in the upper bridge or the lower bridge drive, further improving the efficiency of fault diagnosis.

[0054] Furthermore, a through hole 9 is provided in the middle of the printed circuit board, and the isolation drive circuit 2, power supply circuit 3, first low-voltage electrical interface 4 and second low-voltage electrical interface 5 are arranged around the through hole 9.

[0055] By setting a through hole 9 in the middle of the printed circuit board, it is convenient to observe the controlled power module and to perform temperature measurement and monitoring.

[0056] Furthermore, such as Figure 3 As shown, each circuit is arranged on a printed circuit board. On the BOTTOM layer of the printed circuit board, the U-phase upper bridge drive circuit 21, V-phase upper bridge drive circuit 22 and W-phase upper bridge drive circuit 23 of the isolation drive circuit 2 are arranged above the through hole 9, and the U-phase lower bridge drive circuit 24, V-phase lower bridge drive circuit 25 and W-phase lower bridge drive circuit 26 are arranged below the through hole 9 respectively.

[0057] The upper bridge pre-drive power supply circuit 321, power management circuit 31, second low-voltage electrical interface 5, and lower bridge pre-drive power supply circuit 322 are arranged sequentially from top to bottom on the left side of the through hole 9. The upper bridge fault display circuit 71 and lower bridge fault display circuit 72 are arranged vertically on the left side of the through hole 9. The signal amplification circuit 6 and the first low-voltage electrical interface 4 are arranged between the upper bridge fault display circuit 71 and the lower bridge fault display circuit 72.

[0058] The layout of the BOTTOM layer is similar to that of the TOP layer. Non-isolated traces and copper pours in the driver section are positioned in the middle and on both sides of the entire driver section, making it easier to meet high and low voltage creepage distance requirements. All power networks on the circuit board are connected using copper pours, with the copper width sufficient to handle overcurrent and ensure power supply stability.

[0059] This utility model embodiment can optimize wiring paths and inter-system connection harnesses through reasonable layout. By reasonably arranging and routing components, adjusting the positions of high and low voltage components, widening the creepage distance between high and low voltage components, and reducing the circuit board area, the entire circuit board can realize the drive control function of CompactRIO module board 1 under 1000V high voltage.

[0060] This utility model also provides a power module drive controller, including the power module drive circuit as described in the above embodiments of this utility model.

[0061] Although the exemplary embodiments and their advantages have been described in detail, those skilled in the art can make various changes, substitutions and modifications to these embodiments without departing from the spirit and scope of protection of this utility model, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A power module drive circuit, characterized in that, include: The CompactRIO module board and the isolation drive circuit, power supply circuit, first low-voltage electrical interface and second low-voltage electrical interface set on the printed circuit board. The input terminal of the isolation drive circuit is connected to the CompactRIO module board through the first low-voltage electrical interface, and the output terminal of the isolation drive circuit is connected to the controlled power module. The input terminal of the power supply circuit is connected to an external power source through the second low-voltage electrical interface, and the first output terminal of the power supply circuit is connected to the isolation drive circuit to convert the voltage of the external power source into the operating voltage of the isolation drive circuit.

2. The power module drive circuit according to claim 1, characterized in that, It also includes a signal amplification circuit, the input of which is connected to the first low-voltage electrical interface, the output of which is connected to the isolation drive circuit, and the power supply of which is connected to the second output of the power supply circuit.

3. The power module drive circuit according to claim 1, characterized in that, The power supply circuit includes a power management circuit and a pre-drive isolation power supply. The input terminal of the power management circuit is connected to an external power supply through the second low-voltage electrical interface. The first output terminal of the power management circuit is connected to the input terminal of the pre-drive isolation power supply. The output terminal of the pre-drive isolation power supply is connected to an isolation drive circuit. The power management circuit is used to convert the voltage of the external power supply into an intermediate voltage. The pre-drive isolation power supply is used to convert the intermediate voltage into the operating voltage of the isolation drive circuit. The output terminal of the pre-drive isolation power supply is the first output terminal of the power supply circuit.

4. The power module drive circuit according to claim 3, characterized in that, The pre-drive isolation power supply includes an upper-bridge pre-drive power supply circuit and a lower-bridge pre-drive power supply circuit. The upper-bridge pre-drive power supply circuit and / or the lower-bridge pre-drive power supply circuit include a pre-drive power chip driver circuit, a first transformer, and a rectifier circuit. The input terminal of the pre-drive power chip driver circuit is connected to the first output terminal of the power management circuit. The output terminal of the pre-drive power chip driver circuit is connected to the primary winding of the first transformer. The secondary winding of the first transformer is connected to the input terminal of the rectifier circuit. The output terminal of the rectifier circuit is connected to the isolation drive circuit.

5. The power module drive circuit according to claim 4, characterized in that, The isolation drive circuit includes several single-phase upper bridge isolation drive circuits and several single-phase lower bridge isolation drive circuits. Both the single-phase upper bridge isolation drive circuit and the single-phase lower bridge isolation drive circuit include an isolation side and a non-isolation side.

6. The power module drive circuit according to claim 5, characterized in that, The printed circuit board has slots between the isolation side and the non-isolation side of the single-phase upper bridge isolation drive circuit; And / or, the printed circuit board has a slot between the isolated side and the non-isolated side of the single-phase lower bridge isolation drive circuit.

7. The power module drive circuit according to claim 1, characterized in that, It also includes a fault display circuit, the input terminal of which is connected to the isolation drive circuit, and the power supply terminal of which is connected to the third output terminal of the power supply circuit.

8. The power module drive circuit according to claim 7, characterized in that, The fault display circuit includes an upper bridge fault display circuit and a lower bridge fault display circuit.

9. The power module drive circuit according to claim 1, characterized in that, The printed circuit board has a through hole in the middle, and the isolation drive circuit, the power supply circuit, the first low-voltage electrical interface and the second low-voltage electrical interface are arranged around the through hole.

10. A power module drive controller, characterized in that, Includes the power module drive circuit as described in any one of claims 1 to 9.

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