Power device driving circuit of motor controller, control method and vehicle

Abstract

The invention discloses a power device driving circuit of a motor controller, a control method and a vehicle. The power device driving circuit comprises a gate resistance control module which selectively switches gate resistors of a power device according to a control signal, and switching speeds of the power device are different when the gate resistors are switched to different gate resistors; the detection processing circuit collects the phase current of the motor controller, generates a control signal according to the phase current and a preset voltage reference signal, and sends the control signal to the gate resistance control module; and the isolation driving module is used for sending a driving signal to the power device so as to drive the power device to be switched on and switched off at the corresponding switching speed. According to the invention, the method can effectively improve the efficiency of small current output, can effectively protect the peak and oscillation of a power device during large current output, achieves the real-time switching, is higher in response speed, enables the switching operation to be decomposed into each current period, and is more effective for reducing the loss and protecting the device.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular to a power device driving circuit, a control method and a vehicle for a motor controller. Background Art

[0002] The motor controller of a new energy vehicle is one of the core components of an electric vehicle, and is responsible for converting the direct current of the battery into alternating current to drive the motor. The power device is generally an IGBT or a SiC MOSFET. The driving technology plays a crucial role in the performance, reliability and efficiency of the motor controller. In the driving circuit, the gate resistor plays a crucial role. The selection of the gate resistor directly affects the switching characteristics, losses, EMI (electromagnetic interference) of the power device and the reliability of the system. At present, the driving schemes of new energy vehicles are mainly divided into the following several types: fixed driving parameters, the driving parameters are determined by testing during the product development stage and the circuit is solidified, and the driving parameters do not change under any working conditions during the product operation; the driving parameters can be switched, multiple driving circuits are set in the driving circuit, and during the product operation, according to the magnitude of the current required by the vehicle road spectrum, the corresponding driving circuit is selected.

[0003] As described above, the gate resistor of the power device affects the switching loss of the device, and the intuitive impact is the energy consumption and endurance of the vehicle. When the gate resistor Rg of the power device is large, the switching speed is slow, the switching loss increases, but when the current is large, the effect of suppressing voltage spikes and oscillations is better; when Rg is small, the switching speed is fast, the switching loss is reduced, but when the current is large, the voltage spikes and oscillations are large. In the above-mentioned scheme with fixed driving parameters, that is, at any time and under any working conditions, the driving parameters do not change, which results in choosing a larger gate resistor in order to suppress the voltage spikes and oscillations when a large current is output. When a small current is output, the switching loss of the power device is large, and the performance of the device is not used to the extreme. In the above-mentioned scheme, the driving parameters are switched based on the vehicle road spectrum requirements, and one set of driving parameters is used when the vehicle outputs a large current, and another set of parameters is used when the vehicle outputs a small current. On the one hand, this method requires collecting road spectrum information, and a large amount of driving data needs to be collected, processed and stored; on the other hand, this scheme can only switch parameters according to different working conditions, and cannot switch parameters according to the magnitude of the current within a single current cycle. The limitations are large. Summary of the Invention

[0004] Based on this, it is necessary to provide a power device driving circuit, a control method and a vehicle for a motor controller aiming at the above technical problems, which can effectively improve the efficiency when the controller outputs a small current, and at the same time can effectively protect the power device from spikes and oscillations when a large current is output, perform real-time switching, have a faster response speed, decompose the switching action into each current cycle, and are more effective for reducing losses and protecting the device.

[0005] In a first aspect, a driving circuit for a power device of a motor controller is provided. The motor controller includes an inverter, the inverter includes a plurality of power devices, and the driving circuit includes:

[0006] A gate resistor control module for selectively switching the gate resistor of the power device according to a control signal. When switching to different gate resistors, the switching speed of the power device is different;

[0007] A detection and processing circuit for collecting the phase current of the motor controller, generating the control signal according to the phase current and a preset voltage reference signal, and sending the control signal to the gate resistor control module;

[0008] An isolation driving module for sending a driving signal to the power device through the gate resistor control module to drive the power device to turn on and off at the corresponding switching speed.

[0009] In some examples, the gate resistor control module includes:

[0010] A first resistor;

[0011] A series-connected diode and a second resistor, the series-connected diode and second resistor being in parallel with the first resistor;

[0012] A series-connected control circuit and a third resistor, the series-connected control circuit and third resistor being in parallel with the first resistor, wherein the control circuit is normally open.

[0013] In some examples, the control circuit includes:

[0014] A first MOS transistor and a second MOS transistor, the drain of the first MOS transistor being connected to the output end of the isolation driving module, the source of the first MOS transistor being connected to the source of the second MOS transistor, and the drain of the second MOS transistor being connected to the third resistor;

[0015] A switching transistor, the control end of the switching transistor being connected to the output end of the detection and processing circuit through a voltage-dividing resistor, one end of the switching transistor being grounded and the other end being connected to the gates of the first MOS transistor and the second MOS transistor;

[0016] A filtering circuit, the filtering circuit including a capacitor and a resistor, one end of the filtering circuit being connected to the source of the first MOS transistor and the other end being connected to the other end of the switching transistor.

[0017] In some examples, the detection and processing circuit includes:

[0018] A comparison circuit for outputting a comparison signal according to the phase current and a preset voltage reference signal;

[0019] An isolation circuit, connected to the comparison circuit, for generating the control signal according to the comparison signal.

[0020] In some examples, it further includes:

[0021] A threshold voltage processing circuit for generating the voltage reference signal.

[0022] In some examples, the isolation driving module includes:

[0023] An isolation driving chip;

[0024] A push - pull amplification circuit, and the isolation driving chip is connected to the gate resistance control module through the push - pull amplification circuit.

[0025] In a second aspect, a vehicle is provided, including: a power device driving circuit of the motor controller according to the first aspect above.

[0026] In a third aspect, a control method for a power device driving circuit of a motor controller is provided. The power device driving circuit of the motor controller is the power device driving circuit of the motor controller according to the first aspect above. The control method includes:

[0027] Collecting the phase current of the motor controller;

[0028] Generating the control signal according to the phase current and a preset voltage reference signal;

[0029] Selectively switching the gate resistance of the power device according to the control signal, wherein the switching speed of the power device is different when switching to different gate resistances.

[0030] In a fourth aspect, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the control method for the power device driving circuit of the motor controller in the third aspect above are implemented.

[0031] In a fifth aspect, a computer - readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the steps of the control method for the power device driving circuit of the motor controller in the third aspect above are implemented.

[0032] In a sixth aspect, a computer program product is provided, on which a computer program is stored. When the program is executed by a processor, the steps of the control method for the power device driving circuit of the motor controller in the first aspect and any possible implementation manner of the first aspect above are implemented.

[0033] By adopting the embodiments of the present application, different driving parameters can be matched according to the magnitude of the current, effectively improving the efficiency of the controller during low-current output, while effectively protecting the power devices from spikes and oscillations during high-current output. Real-time switching is achieved with a faster response speed, and the switching operation is decomposed into each current cycle, which is more effective in reducing losses and protecting the devices. Through testing the entire life cycle of the power devices, the original equipment manufacturer can set different voltage reference signals for them through OTA upgrades according to each stage, effectively protecting the devices while reducing losses and improving the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objectives, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0035] Figure 1 It is a topology diagram of a motor controller;

[0036] Figure 2 It is a structural block diagram of the power device drive circuit of the motor controller provided by the embodiment of the present application;

[0037] Figure 3 It is a topology diagram of the gate drive circuit of the power device in the power device drive circuit of the motor controller provided by the embodiment of the present application;

[0038] Figure 4 It is a circuit topology diagram of the control circuit in the power device drive circuit of the motor controller provided by the embodiment of the present application;

[0039] Figure 5 It is a circuit topology diagram of the detection and processing circuit in the power device drive circuit of the motor controller provided by the embodiment of the present application;

[0040] Figure 6 It is a circuit topology diagram of the threshold voltage processing circuit in the power device drive circuit of the motor controller provided by the embodiment of the present application;

[0041] Figure 7 It is a schematic diagram of the output current waveform of the U phase of the motor controller;

[0042] Figure 8 It is a current waveform diagram when the control circuit remains closed when the output current of the motor controller is continuously less than the threshold current;

[0043] Figure 9 It is a flowchart of the control method of the power device drive circuit of the motor controller provided by the embodiment of the present application;

[0044] Figure 10 It is a structural block diagram of the computer device provided by the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The present application will be further described in detail below in conjunction with embodiments and the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the relevant application, rather than limiting the application. Additionally, it should be noted that for ease of description, only parts related to the application are shown in the drawings.

[0046] It should be noted that, without conflict, the embodiments and the features of the embodiments in the present application can be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0047] The power device driving circuit, control method, and vehicle of the motor controller according to an embodiment of the present application will be described in detail below with reference to the drawings.

[0048] First, the motor controller of the vehicle will be described. The motor controller is one of the core components of an electric vehicle and is responsible for converting the direct current of the power battery into alternating current to drive the motor. As Figure 1 shown, the motor controller includes an inverter. The inverter generally includes a plurality of power switching tubes (such as IGBT switching tubes Q1, Q2, Q3, Q4, Q5, and Q6), which are also called power devices. The power devices are generally selected as IGBTs or SiC MOSFETs. Taking the IGBT power switching tube as an example, the on / off control realizes the operation of the inverter. The driving technology plays a crucial role in the performance, reliability, and efficiency of the motor controller. In the driving circuit, the gate resistor plays a crucial role. The selection of the gate resistor directly affects the switching characteristics, losses, EMI (electromagnetic interference), and the reliability of the system of the power device.

[0049] Figure 2 is a structural block diagram of the power device driving circuit of the motor controller according to an embodiment of the present application. As Figure 2 shown, the power device driving circuit of the motor controller according to an embodiment of the present application includes: a gate resistor control module 110, a detection and processing circuit 120, and an isolation driving module 130, where:

[0050] The gate resistor control module 110 is used to selectively switch the gate resistor of the power device according to a control signal. When switching to different gate resistors, the switching speed of the power device is different; the detection and processing circuit 120 is used to collect the phase current of the motor controller, generate the control signal according to the phase current and a preset voltage reference signal, and send the control signal to the gate resistor control module; the isolation driving module 130 is used to send a driving signal to the power device through the gate resistor control module to drive the power device to turn on and off at the corresponding switching speed.

[0051] Combined withFigure 3 As shown, the isolation drive module includes: an isolation drive chip; a push-pull amplifier circuit, and the isolation drive chip is connected to the gate resistor control module through the push-pull amplifier circuit.

[0052] PWM and / PWM are drive signals sent by the main control chip, where the two groups of signals are differential from each other; the main function of the isolation drive chip is to isolate the high-voltage circuit on the right side from the low-voltage control circuit; the main function of the push-pull amplifier circuit is to amplify the power of the drive signal output by the drive chip and provide sink current and source current capabilities; R1, R2, R3 and R5, R6, R7 are gate resistors. Due to the reverse cut-off characteristics of diodes D1 and D2, taking the upper bridge as an example, when the IGBT is turned on, the on-resistance is R1 / / R2 / / R3, and when the IGBT is turned off, the off-resistance is R1 / / R3 (here the control circuit T is regarded as normally open); the control circuit T and the control circuit B are gate resistor switching circuits. When the circuit is closed, the resistor is connected to the drive resistor to change the resistance values of the on and off resistors. Here, a control circuit is set for the upper and lower bridges respectively, and multiple control circuits can be set according to requirements to achieve multi-level control.

[0053] As Figure 3 shown, two gate resistor control modules are shown. Figure 3 The one above is called the first gate resistor control module, and the one below is called the second gate resistor control module. Taking the first gate resistor control module as an example, it includes:

[0054] The first resistor R1; the diode D1 and the second resistor R2 connected in series, and the series-connected diode D1 and second resistor R2 are connected in parallel with the first resistor R1; the control circuit T and the third resistor R3 connected in series, and the series-connected control circuit T and third resistor R3 are connected in parallel with the first resistor R1, where the control circuit T is normally open.

[0055] Taking the second gate resistor control module as an example, it includes:

[0056] The resistor R5; the diode D2 and the resistor R6 connected in series, and the series-connected diode D2 and resistor R6 are connected in parallel with the resistor R5; the control circuit B and the resistor R7 connected in series, and the series-connected control circuit B and resistor R7 are connected in parallel with the resistor R5, where the control circuit B is normally open.

[0057] Furthermore, as Figure 4 shown and combined with Figure 3 , taking Figure 3 the control circuit T as an example, it includes:

[0058] The first MOS transistor Q5 and the second MOS transistor Q6, the drain of the first MOS transistor Q5 is connected to the output terminal of the isolation driving module, the source of the first MOS transistor Q5 is connected to the source of the second MOS transistor Q6, and the drain of the second MOS transistor Q6 is connected to the third resistor R3; a switching transistor Q10, the control terminal of the switching transistor Q10 is connected to the output terminal of the detection and processing circuit through a voltage dividing resistor (receiving UT_Single), one end of the switching transistor Q10 is grounded and the other end is connected to the gates of the first MOS transistor Q5 and the second MOS transistor Q6; a filtering circuit, the filtering circuit includes a capacitor C1 and a resistor R9, one end of the filtering circuit is connected to the source of the first MOS transistor Q5 and the other end is connected to the other end of the switching transistor Q10.

[0059] As Figure 4 shown, the circuit of the control circuit B is the same as that of the control circuit T and will not be elaborated.

[0060] Points A, B, C, and D correspond one-to-one with Figure 3 points A, B, C, and D in [reference]. Q5, Q6, Q7, and Q8 are P-MOS transistors. UT_single and UB_single are corresponding control signals. When the control signal is at a high level, the MOS transistor is turned on and the current can flow bidirectionally. When the control signal is at a low level, the MOS transistor is turned off and the circuit is not conducting.

[0061] As Figure 5 shown, the detection and processing circuit includes: a comparison circuit (i.e., a window comparison circuit) and an isolation circuit. Among them, the comparison circuit is used to output a comparison signal according to the phase current and a preset voltage reference signal; the isolation circuit is connected to the comparison circuit and is used to generate the control signal according to the comparison signal.

[0062] Iu_single is a current sampling signal; VH1 and VL1 are voltage reference signals, which can be converted into corresponding current threshold points according to the processing coefficient of the current sampling signal; the window comparison circuit consists of two comparators. When the voltage of Iu_single is between VH and VL, the output voltage is at a high level, that is, Figure 5 the voltage at point M in [reference] is at a high level. When the voltage of Iu_single is greater than VH or less than VL, the output voltage is at a low level, that is, Figure 5 the voltage at point M in [reference] is at a low level; for the isolation circuit, an isolation optocoupler can be used to isolate the low-voltage circuit on the left from the high-voltage circuit on the right, or other isolation devices can also be used. When the level at point M is high, the levels of UT_single and UB_single are high. When the level at point M is low, the levels of UT_single and UB_single are low.

[0063] As Figure 6As shown, it further includes a threshold voltage processing circuit for generating the voltage reference signal. Different duty cycle PWM waves can be output by the DSP, and after passing through a three-stage RC circuit, the threshold voltages VH1 and VL1 are generated; the corresponding threshold voltages VH1 and VL1 can also be directly output through the DAC pin of the DSP chip; since the threshold voltages are generated by the DSP chip, the threshold voltage values can be changed by OTA upgrade as needed.

[0064] As Figure 7 shown, it is the U-phase output current waveform of the motor controller. I1 is the set threshold current point. When the absolute value of the output current is less than I1, that is, during the small current output period, the control circuit is turned on, and the IGBT gate resistor is switched to a small resistor, improving the on / off speed and reducing the loss; when the absolute value of the output current is greater than I1, the control current is closed, and the IGBT gate resistor is switched to a large resistor, reducing the on / off speed and suppressing the IGBT peak voltage and oscillation to protect the IGBT.

[0065] As Figure 8 shown, the waveform is that when the output current of the motor controller continuously is less than the threshold current, the control circuit is always in the closed state. It improves the switching speed under small current, reduces the switching loss, and improves the system efficiency.

[0066] According to the power device drive circuit of the motor controller in the embodiment of the present application, it can realize the real-time switching of drive parameters within a single current cycle without changing the original control strategy of the motor controller. Thus, it effectively reduces the system loss and improves the system efficiency. In addition, there is no need to store road spectrum data and analyze data for drive parameter control switching, the system is more concise, and the drive detection, comparison, and switching are built through a pure hardware circuit, making the system response time faster. The threshold point is generated by PWM modulation through a microprocessing chip, and the threshold point can be flexibly changed to ensure that there is a corresponding suitable threshold point for the power device throughout its life cycle.

[0067] It has the following advantages:

[0068] Match different drive parameters according to the current magnitude, effectively improving the efficiency of the controller during small current output, while effectively protecting the power device from spikes and oscillations during large current output. The real-time switching has a faster response speed, and the switching action is decomposed into each current cycle, which is more effective for reducing loss and protecting the device. Through the testing of the entire life cycle of the power device, according to each stage, the host factory can set different voltage reference signals for it through OTA upgrade. While reducing the loss, it can effectively protect the device and improve the product reliability.

[0069] In one embodiment, a vehicle is provided, including: a power device drive circuit of the motor controller according to any one of the above embodiments. The vehicle can match different drive parameters according to the magnitude of the current, effectively improving the efficiency when the controller outputs a small current, and at the same time effectively protecting the power device from spikes and oscillations during large current output. It can be switched in real time with a faster response speed. The switching operation is decomposed into each current cycle, which is more effective for reducing losses and protecting the device. Through testing the entire life cycle of the power device, according to each stage, the vehicle manufacturer can set different voltage reference signals for it through OTA upgrade, which can effectively protect the device while reducing losses and improve product reliability.

[0070] In addition, the other components and functions of the vehicle according to the embodiments of the present application are known to those of ordinary skill in the art, and will not be elaborated here.

[0071] Figure 9 is a flowchart of a control method for a power device drive circuit of a motor controller according to an embodiment of the present application, as Figure 9 shown, a control method for a power device drive circuit of a motor controller according to an embodiment of the present application includes the following steps:

[0072] S101: Collect the phase current of the motor controller;

[0073] S102: Generate the control signal according to the phase current and a preset voltage reference signal;

[0074] S103: Selectively switch the gate resistance of the power device according to the control signal, wherein the switching speed of the power device is different when switching to different gate resistances.

[0075] The control method for the power device drive circuit according to the embodiments of the present application can match different drive parameters according to the magnitude of the current, effectively improving the efficiency when the controller outputs a small current, and at the same time effectively protecting the power device from spikes and oscillations during large current output. It can be switched in real time with a faster response speed. The switching operation is decomposed into each current cycle, which is more effective for reducing losses and protecting the device. Through testing the entire life cycle of the power device, according to each stage, the vehicle manufacturer can set different voltage reference signals for it through OTA upgrade, which can effectively protect the device while reducing losses and improve product reliability.

[0076] For the specific limitations on the control method of the power device drive circuit of the motor controller, reference can be made to the limitations on the power device drive circuit of the motor controller described above, which will not be elaborated here. Each module of the power device drive circuit of the above motor controller can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0077] In one embodiment, a computer device is provided. Figure 10 This is the structural block diagram of the computer device provided in the embodiments of the present application. Refer to Figure 10 . The computer device includes a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the control method embodiment of the power device drive circuit of the aforementioned motor controller. For example, it executes: collecting the phase current of the motor controller;

[0078] Generating the control signal according to the phase current and a preset voltage reference signal;

[0079] Selectively switching the gate resistance of the power device according to the control signal, where the switching speed of the power device is different when switching to different gate resistances.

[0080] In the embodiments of the present application, a computer-readable storage medium is also provided. The computer-readable storage medium stores a computer program. When the processor executes the computer program, it implements the control method embodiment of the power device drive circuit of the aforementioned motor controller. For example, it executes: collecting the phase current of the motor controller;

[0081] Generating the control signal according to the phase current and a preset voltage reference signal;

[0082] Selectively switching the gate resistance of the power device according to the control signal, where the switching speed of the power device is different when switching to different gate resistances.

[0083] In the embodiments of the present application, a computer program product is provided. The computer program product includes instructions. When the instructions are run, the method described in the embodiments of the present application is executed. For example, the steps of the control method of the power device drive circuit of the motor controller shown in Figure 9 can be executed. For example, it executes: collecting the phase current of the motor controller;

[0084] Generating the control signal according to the phase current and a preset voltage reference signal;

[0085] Selectively switch the gate resistance of the power device according to the control signal, wherein the switching speed of the power device is different when switching to different gate resistances.

[0086] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0087] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0088] The above embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A power device driving circuit of a motor controller, characterized in that The motor controller includes an inverter, the inverter includes a plurality of power devices, and the drive circuit includes: A gate resistor control module for selectively switching the gate resistor of the power device according to a control signal, wherein the switching speed of the power device is different when switching to different gate resistors; A detection and processing circuit for collecting the phase current of the motor controller, generating the control signal according to the phase current and a preset voltage reference signal, and sending the control signal to the gate resistor control module; An isolation drive module for sending a drive signal to the power device through the gate resistor control module to drive the power device to turn on and off at a corresponding switching speed.

2. The power device driving circuit of the motor controller according to claim 1, characterized in that, The gate resistor control module includes: A first resistor; A diode and a second resistor connected in series, and the series-connected diode and second resistor are connected in parallel with the first resistor; A control circuit and a third resistor connected in series, and the series-connected control circuit and third resistor are connected in parallel with the first resistor, wherein the control circuit is normally open.

3. The power device driving circuit of the motor controller according to claim 2, wherein The control circuit includes: A first MOS transistor and a second MOS transistor, the drain of the first MOS transistor is connected to the output end of the isolation drive module, the source of the first MOS transistor is connected to the source of the second MOS transistor, and the drain of the second MOS transistor is connected to the third resistor; A switching transistor, the control end of the switching transistor is connected to the output end of the detection and processing circuit through a voltage dividing resistor, one end of the switching transistor is grounded and the other end is connected to the gates of the first MOS transistor and the second MOS transistor; A filter circuit, the filter circuit includes a capacitor and a resistor, one end of the filter circuit is connected to the source of the first MOS transistor and the other end is connected to the other end of the switching transistor.

4. The power device driving circuit of the motor controller according to claim 1, characterized in that, The detection and processing circuit includes: A comparison circuit for outputting a comparison signal according to the phase current and a preset voltage reference signal; An isolation circuit connected to the comparison circuit for generating the control signal according to the comparison signal.

5. The power device driving circuit of the motor controller according to any one of claims 1-4, characterized in that, It further includes: A threshold voltage processing circuit for generating the voltage reference signal.

6. The power device driving circuit of the motor controller according to claim 1, characterized in that, The isolation drive module includes: An isolation drive chip; A push-pull amplification circuit, and the isolation drive chip is connected to the gate resistor control module through the push-pull amplification circuit.

7. A vehicle, characterized in that, It includes: The power device drive circuit of the motor controller according to any one of claims 1-6.

8. A control method for a power device driving circuit of a motor controller, characterized in that, The power device drive circuit of the motor controller is the power device drive circuit of the motor controller according to any one of claims 1-6, and the control method includes: Collecting the phase current of the motor controller; Generating the control signal according to the phase current and a preset voltage reference signal; Selectively switching the gate resistor of the power device according to the control signal, wherein the switching speed of the power device is different when switching to different gate resistors.

9. A computer device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it realizes the control method of the power device drive circuit of the motor controller according to claim 8.

10. A computer-readable storage medium, comprising a memory and a computer program stored on the memory and executable on a processor, characterized in that, When the program is executed by the processor, it realizes the control method of the power device drive circuit of the motor controller according to claim 8.

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