Driving circuit, control method and device of motor controller and vehicle

Abstract

The invention relates to a driving circuit, a control method and device of a motor controller and a vehicle, relates to the technical field of vehicles, and at least solves the technical problem that the working efficiency of the motor controller is difficult to improve in related technologies. The drive circuit comprises: a power module (10); a first conduction module (20), a first end of the first conduction module (20) is electrically connected with a first power supply signal end (VCC), and a second end of the first conduction module (20) is electrically connected with an input end of the power module (10); a second conduction module (30), the first end of the second conduction module (30) is electrically connected with the first power supply signal end (VCC), the second end of the second conduction module (30) is electrically connected with the input end of the power module (10), and the resistance value of the second conduction module (30) is greater than that of the first conduction module (20); therefore, the working efficiency of the motor controller can be improved.

Description

Technical Field

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

[0002] A motor controller can convert direct current into alternating current by controlling the on or off of a power module, so that the motor operates. However, the on or off of the power module will cause changes in current and voltage, which may increase the power loss of the motor controller.

[0003] One prior art provides a control method for a motor controller. This method can determine the target resistance value corresponding to the equivalent drive resistance connected to the power module based on the current output current of the power module, and reduce the power loss of the motor controller by adjusting the equivalent drive resistance to the target resistance value. Another prior art provides a controller for an isolated switching converter, which receives information indicating the working mode of the switching converter through a gate driver, and controls the switching of the drive control signal between a first drive strength and a second drive strength based on this information, so as to reduce the power loss of the motor controller.

[0004] Although the above methods can all reduce the power loss of the motor controller, the situations considered by the above methods are relatively single, and it is difficult to improve the working efficiency of the motor controller. Therefore, how to improve the working efficiency of the motor controller has become an urgent problem to be solved currently. Summary of the Invention

[0005] The present application provides a drive circuit, a control method and device for a motor controller, and a vehicle, so as to at least solve the technical problem in the related art that it is difficult to improve the working efficiency of the motor controller.

[0006] According to the first aspect provided by the present application, the present invention provides a driving circuit. The driving circuit includes: a power module; a first conduction module, the first end of the first conduction module is electrically connected to the first power signal terminal, and the second end of the first conduction module is electrically connected to the input terminal of the power module; a second conduction module, the first end of the second conduction module is electrically connected to the first power signal terminal, and the second end of the second conduction module is electrically connected to the input terminal of the power module, and the resistance value of the second conduction module is less than that of the first conduction module. Wherein, when the first conduction module is configured to be in a conducting state, the power module and the first conduction module form a first conduction loop, and the driving strength of the driving circuit is the first driving strength; when the second conduction module is configured to be in a conducting state, the power module and the second conduction module form a second conduction loop, and the driving strength of the driving circuit is the second driving strength; when both the first conduction module and the second conduction module are configured to be in a conducting state, the power module, the first conduction module and the second conduction module form a third conduction loop, and the driving strength of the driving circuit is the third driving strength.

[0007] In a possible implementation manner, the first conduction module includes: a first resistor, and the second conduction module includes: a second resistor. The first end of the first resistor is electrically connected to the first power signal terminal, and the second end of the first resistor is electrically connected to the input terminal of the power module. The first end of the second resistor is electrically connected to the first power signal terminal, and the second end of the second resistor is electrically connected to the input terminal of the power module, and the resistance value of the second resistor is less than that of the first resistor.

[0008] In a possible implementation manner, the first conduction module further includes: a first switching element, and the second conduction module further includes: a second switching element. The first end of the first switching element is electrically connected to the first power signal terminal, the second end of the first switching element is connected to the first end of the first resistor, and the second end of the first resistor is electrically connected to the input terminal of the power module. The first end of the second switching element is electrically connected to the first power signal terminal, the second end of the second switching element is connected to the first end of the second resistor, and the second end of the second resistor is electrically connected to the input terminal of the power module.

[0009] In a possible implementation manner, the driving circuit further includes: a first turn-off module, the first end of the first turn-off module is electrically connected to the second power signal terminal, and the second end of the first turn-off module is electrically connected to the input terminal of the power module; a second turn-off module, the first end of the second turn-off module is electrically connected to the second power signal terminal, and the second end of the second turn-off module is electrically connected to the input terminal of the power module.

[0010] According to a second aspect provided by the present application, a control method for a motor controller is provided, which is applied to the drive circuit as in the first aspect. The control method for the motor controller includes: obtaining current state information of the motor controller, where the current state information includes: current current, current voltage, and current power. Based on the current state information and a preset conduction control condition, adjusting the conduction module state of the first conduction module and / or the second conduction module to adjust the driving strength of the motor controller, and the conduction module state is used to indicate whether the conduction module is conducting or disconnected.

[0011] In a possible implementation manner, the preset conduction control condition includes: a first control condition and a second control condition. The first control condition is used to indicate that the current power is greater than or equal to a preset power threshold, and the second control condition is used to indicate that the current power is less than the preset power threshold. Based on the current state information and the preset conduction control condition, adjusting the conduction module state of the first conduction module and / or the second conduction module includes: when the current state information satisfies the first control condition, controlling the first conduction module or the second conduction module to conduct. When the current state information satisfies the second control condition, controlling the first conduction module and the second conduction module, or the first conduction module to conduct.

[0012] In a possible implementation manner, the first control condition includes: a first preset conduction condition. The first preset conduction condition includes at least one of the following: the current voltage is greater than or equal to a first voltage threshold, and the current current is greater than or equal to a first current threshold. The current voltage is greater than or equal to a first voltage threshold, the current current is greater than or equal to a second current threshold, the current current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to a first voltage threshold, the current current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to a second voltage threshold, the current voltage is less than the first voltage threshold, the current current is greater than or equal to a first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is less than or equal to a second voltage threshold, the current current is greater than or equal to a first current threshold, and the current power is greater than or equal to the preset power threshold.

[0013] In a possible implementation manner, the second control condition includes: a second preset conduction condition. The second preset conduction condition includes at least one of the following: the current voltage is greater than or equal to the first voltage threshold, and the current current is less than the second current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is less than the second current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current current is less than the second current threshold.

[0014] In a possible implementation manner, the first control condition further includes: a third preset conduction condition, and the second control condition further includes: a third preset conduction condition. The third preset conduction condition includes at least one of the following: the current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to the first voltage threshold, and the current current is greater than or equal to the second current threshold and the current current is less than the first current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold.

[0015] According to a third aspect provided by the present application, a control device for a motor controller is provided. The device includes an acquisition module and a processing module. The acquisition module is configured to acquire the current state information of the motor controller, and the current state information includes: the current current, the current voltage, and the current power. The processing module is configured to adjust the conduction module state of the first conduction module and / or the second conduction module based on the current state information and the preset conduction control conditions, so as to adjust the driving strength of the motor controller, and the conduction module state is used to indicate whether the conduction module is conducting or disconnected.

[0016] In a possible implementation manner, the preset conduction control conditions include: a first control condition and a second control condition. The first control condition is used to indicate that the current power is greater than or equal to a preset power threshold, and the second control condition is used to indicate that the current power is less than the preset power threshold. The processing module is configured to control the first conduction module or the second conduction module to conduct when the current state information meets the first control condition. The processing module is further configured to control the first conduction module and the second conduction module, or the first conduction module to conduct when the current state information meets the second control condition.

[0017] In a possible implementation manner, the first control condition includes: a first preset conduction condition. The first preset conduction condition includes at least one of the following: the current voltage is greater than or equal to a first voltage threshold, and the current current is greater than or equal to a first current threshold. The current voltage is greater than or equal to a first voltage threshold, and the current current is greater than or equal to a second current threshold, and the current current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to a first voltage threshold, and the current current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to a second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is less than or equal to a second voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is greater than or equal to the preset power threshold.

[0018] In a possible implementation manner, the second control condition includes: a second preset conduction condition. The second preset conduction condition includes at least one of the following: the current voltage is greater than or equal to a first voltage threshold, and the current current is less than the second current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to a second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is less than the second current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to a second voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to a second voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to a second voltage threshold, and the current current is less than the second current threshold.

[0019] In a possible implementation manner, the first control condition further includes: a third preset conduction condition, and the second control condition further includes: a third preset conduction condition. The third preset conduction condition includes at least one of the following: the current voltage is greater than or equal to a second voltage threshold, and the current voltage is less than a first voltage threshold, and the current current is less than a second current threshold, and the current power is greater than or equal to a preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to the first voltage threshold, and the current current is greater than or equal to the second current threshold and the current current is less than the first current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold.

[0020] According to a fourth aspect provided by the present application, there is provided a control device for a motor controller, including: a processor; a memory for storing instructions executable by the processor; wherein, the processor is configured to execute the instructions to implement the method according to the first aspect and any of its possible implementation manners.

[0021] According to a fifth aspect provided by the present application, there is provided a vehicle, the vehicle includes the control device of the motor controller according to the second aspect, and the vehicle is used to implement the method according to the first aspect and any of its possible implementation manners as described above.

[0022] Advantages of the present invention: (1) By controlling the on / off of the first conduction module 20 and / or the second conduction module, the driving strength of the driving circuit can be determined, so as to more accurately control the switching speed of the power module 10, thereby reducing the power loss of the motor controller and improving the efficiency of the electrode controller.

[0023] (2) The resistance value of the second resistor RON2 is less than the resistance value of the first resistor RON1, which can make the driving strength of the first conduction loop less than the driving strength of the second conduction loop, so that the driving strength of the driving circuit can be controlled by controlling the on / off of the first conduction module 20 and the second conduction module.

[0024] (3) By controlling the conduction or closing of the first switching element Q1, the conduction or closing of the first conduction loop can be controlled. By controlling the conduction or closing of the second switching element Q2, the conduction or closing of the second conduction loop can be controlled. In this way, the driving strength of the driving circuit can be adjusted by controlling the conduction or closing of the first switching element Q1 and the second switching element Q2.

[0025] When the first turn-off module 40 is in the conducting state, the current at the input terminal of the power module 10 can flow through the first turn-off module 40 and the second turn-off module 50 to the second power signal terminal VEE, so that the power module 10 discharges. When the second turn-off module 50 is in the conducting state, the current at the input terminal of the power module 10 can flow through the second turn-off module 50 to the second power signal terminal VEE, so that the power module 10 discharges.

[0026] (5) According to the current state information and the preset conduction control conditions, adjusting the conduction module state of the first conduction module and / or the second conduction module can adjust the drive current of the motor controller, thereby adjusting the drive strength of the motor controller. Moreover, by considering the effects of current, voltage, and power on the motor controller simultaneously, the drive strength of the motor controller can be adjusted more accurately, thereby reducing the power loss of the motor controller and improving the efficiency of the electrode controller.

[0027] (6) When the current state information of the motor controller satisfies the first control condition and the current power of the motor controller is greater than or equal to the preset power threshold, the device temperature in the motor controller is relatively high. At this time, by controlling the first conduction module or the second conduction module to conduct, the drive strength of the motor controller can be adjusted to the second preset drive strength, thereby avoiding damage to the devices in the motor controller and affecting the efficiency of the motor controller. When the current state information of the motor controller satisfies the second control condition and the current power of the motor controller is less than the preset power threshold, the device temperature in the motor controller is relatively low. At this time, by controlling the first conduction module and the second conduction module, or the first conduction module to conduct, the drive strength of the motor controller can be adjusted to the first preset drive strength, thereby reducing the switching loss of the power module and improving the efficiency of the motor controller, and not causing damage to the devices in the motor controller.

[0028] (7) When the current voltage or the current current of the motor controller is relatively large and the current power is greater than or equal to the preset power threshold, the device temperature of the motor controller is the highest at this time. Adjusting the drive strength of the motor controller to the first preset drive strength can cool down the devices of the motor controller and avoid damage to the devices of the motor controller.

[0029] (8) The current power of the motor controller can be determined by the current voltage and the current current of the motor controller. When the current voltage or the current current of the motor controller is relatively small and the current power is less than the preset power threshold, the device temperature of the motor controller is the lowest at this time. Adjusting the drive strength of the motor controller to the second preset drive strength can reduce the switching loss of the power module 10 and improve the efficiency of the motor controller.

[0030] (9) When any two of the current voltage, current, and power of the motor controller are relatively large, the device temperature of the motor controller is in an intermediate state. By adjusting the driving strength of the motor controller, the efficiency of the motor controller can be improved while cooling the device of the motor controller, avoiding damage to the device of the motor controller.

[0031] It should be noted that for the technical effects brought by any implementation manner in the second aspect to the fifth aspect, reference may be made to the technical effects brought by the corresponding implementation manner in the first aspect, which will not be elaborated here.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit this application. Description of the Drawings

[0033] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application, and do not constitute an improper limitation to this application.

[0034] Figure 1 is a schematic structural diagram of a driving circuit shown according to an exemplary embodiment; Figure 2 is a schematic flowchart of a control method for a motor controller shown according to an exemplary embodiment; Figure 3 is an example schematic diagram of a control method for a motor controller shown according to an exemplary embodiment; Figure 4 is a schematic flowchart of another control method for a motor controller shown according to an exemplary embodiment; Figure 5 is a schematic flowchart of another control method for a motor controller shown according to an exemplary embodiment; Figure 6 is a schematic flowchart of another control method for a motor controller shown according to an exemplary embodiment; Figure 7 is a schematic structural diagram of a control device for a motor controller shown according to an exemplary embodiment; Figure 8 is a schematic structural diagram of another control device for a motor controller shown according to an exemplary embodiment.

[0035] Reference Signs: 10. Power module; 20. First conduction module; 30. Second conduction module; VCC. First power signal terminal; RON1. First resistor; RON2. Second resistor; Q1. First switching element; Q2. Second switching element; 40. First turn-off module; 50. Second turn-off module; VEE. Second power signal terminal; ROFF1. Third resistor; Q3. Third switching element; ROFF2. Fourth resistor; Q4. Fourth switching element; OUTH1. First turn-on pin; OUTH2. Second turn-on pin; OUTL1. First turn-off pin; OUTL2. Second turn-off pin; RG_Internal. Power resistor. Detailed implementation manners

[0036] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0038] In an exemplary embodiment, the embodiment of the present application provides a vehicle, which includes a motor controller, and the vehicle can execute through the motor controller to complete the method in the above-mentioned embodiment.

[0039] In some embodiments, the motor controller includes: a drive circuit.

[0040] As Figure 1 shown, the present application provides a structural schematic diagram of a drive circuit, and the drive circuit includes: a power module 10, a first conduction module 20, and a second conduction module 30.

[0041] Among them, the first end of the first conduction module 20 is electrically connected to the first power signal terminal VCC, and the second end of the first conduction module 20 is electrically connected to the input end of the power module 10. The first end of the second conduction module 30 is electrically connected to the first power signal terminal VCC, the second end of the second conduction module 30 is electrically connected to the input end of the power module 10, and the resistance value of the second conduction module 30 is less than the resistance value of the first conduction module 20.

[0042] Wherein, when the first conduction module 20 is configured to be in a conduction state, the power module 10 and the first conduction module 20 form a first conduction loop, and the driving strength of the driving circuit is the first driving strength. When the second conduction module 30 is configured to be in a conduction state, the power module 10 and the second conduction module 30 form a second conduction loop, and the driving strength of the driving circuit is the second driving strength. When both the first conduction module 20 and the second conduction module 30 are configured to be in a conduction state, the power module 10, the first conduction module 20 and the second conduction module 30 form a third conduction loop, and the driving strength of the driving circuit is the third driving strength.

[0043] It should be noted that the driving strength refers to the ability of the driving circuit to supply charge to the power module 10.

[0044] In the embodiment of the present application, the first power signal terminal VCC is the positive power supply voltage of the driving circuit (i.e., the voltage value is greater than 0V), and can be used to output a driving current.

[0045] Optionally, when the first conduction module 20 is in a conduction state, the driving current of the first power signal terminal VCC can flow through the first conduction module 20 to the input end of the power module 10. When the second conduction module 30 is in a conduction state, the driving current of the first power signal terminal VCC can flow through the second conduction module 30 to the input end of the power module 10. When both the first conduction module 20 and the second conduction module 30 are in a conduction state at the same time, the driving current of the first power signal terminal VCC can flow through the first conduction module 20 and the second conduction module 30 to the input end of the power module 10.

[0046] It should be noted that the switching loss of the power module 10 accounts for a relatively high proportion in the loss of the motor controller. Among them, the switching loss of the power module 10 is proportional to the switching frequency and the switching time. By increasing the driving strength of the motor controller, the switching time of the motor controller can be reduced, and thus the switching loss of the power module 10 can be reduced, and the efficiency of the motor controller can be improved. However, when the driving strength of the motor controller increases, the current power of the motor controller will become higher, and the temperature of the components in the motor controller will rise, which may cause local overheating of the components in the motor controller, thereby damaging the motor controller.

[0047] It can be understood that by controlling the on / off of the first conduction module 20 and / or the second conduction module 30, the driving strength of the driving circuit can be determined to more accurately control the switching speed of the power module 10, thereby reducing the power loss of the motor controller and improving the efficiency of the electrode controller.

[0048] In some embodiments, such as Figure 1As shown, the first conduction module 20 includes: a first resistor RON1, and the second conduction module 30 includes: a second resistor RON2. The first end of the first resistor RON1 is electrically connected to the first power supply signal terminal VCC, and the second end of the first resistor RON1 is electrically connected to the input end of the power module 10. The first end of the second resistor RON2 is electrically connected to the first power supply signal terminal VCC, and the second end of the second resistor RON2 is electrically connected to the input end of the power module 10. The resistance value of the second resistor RON2 is smaller than that of the first resistor RON1.

[0049] Wherein, the first resistor RON1 and the second resistor RON2 can be used to limit the magnitude of the first drive current, so as to achieve overcurrent protection for the power module 10. When the first drive current flows through the first resistor RON1 and the second resistor RON2, voltage drops will be generated across the first resistor RON1 and the second resistor RON2. When the voltage drops across the first resistor RON1 and the second resistor RON2 are greater than the turn-on voltage of the first amplification unit, the first amplification unit conducts, and the current of the first power supply signal terminal VCC can flow to the input end of the power module 10 through the first amplification unit, that is, the first amplification unit provides a second drive current to the input end of the power module 10.

[0050] It should be noted that by predicting and pre-controlling the equivalent drive resistance through the current output at present, since the change trend of the equivalent drive resistance is positively correlated with the change trend of the current output at present, when the current output at present is relatively small, a smaller target resistance value can be adopted for the equivalent drive resistance. In this way, it is beneficial to reduce the switching loss and improve the efficiency of the motor controller.

[0051] It can be understood that the resistance value of the second resistor RON2 being smaller than that of the first resistor RON1 can make the driving strength of the first conduction loop smaller than that of the second conduction loop, so that the driving strength of the driving circuit can be controlled by controlling the on / off of the first conduction module 20 and the second conduction module 30.

[0052] In some embodiments, as Figure 1 shown, the first conduction module 20 further includes: a first switching element Q1, and the second conduction module 30 further includes: a second switching element Q2. The first end of the first switching element Q1 is electrically connected to the first power supply signal terminal VCC, the second end of the first switching element Q1 is connected to the first end of the first resistor RON1, and the second end of the first resistor RON1 is electrically connected to the input end of the power module 10. The first end of the second switching element Q2 is electrically connected to the first power supply signal terminal VCC, the second end of the second switching element Q2 is connected to the first end of the second resistor RON2, and the second end of the second resistor RON2 is electrically connected to the input end of the power module 10.

[0053] It should be noted that the present application places no restrictions on the first switching element Q1 and the second switching element Q2. For example, the first switching element Q1 can be a triode or a metal-oxide-semiconductor field-effect transistor (MOSFET).

[0054] It can be understood that by controlling the conduction or cut-off of the first switching element Q1, the conduction or cut-off of the first conduction loop can be controlled. By controlling the conduction or cut-off of the second switching element Q2, the conduction or cut-off of the second conduction loop can be controlled. Thus, the driving strength of the driving circuit can be adjusted by controlling the conduction or cut-off of the first switching element Q1 and the second switching element Q2.

[0055] In some embodiments, as Figure 1 shown, the driving circuit further includes: a first turn-off module 40 and a second turn-off module 50.

[0056] Among them, the first end of the first turn-off module 40 is electrically connected to the second power signal terminal VEE, and the second end of the first turn-off module 40 is electrically connected to the input terminal of the power module 10. The first end of the second turn-off module 50 is electrically connected to the second power signal terminal VEE, and the second end of the second turn-off module 50 is electrically connected to the input terminal of the power module 10.

[0057] Among them, the second power signal terminal VEE is the ground terminal of the driving circuit.

[0058] It can be understood that when the first turn-off module 40 is in the conduction state, the current at the input terminal of the power module 10 can flow through the first turn-off module 40 and the second turn-off module 50 to the second power signal terminal VEE, so that the power module 10 discharges. When the second turn-off module 50 is in the conduction state, the current at the input terminal of the power module 10 can flow through the second turn-off module 50 to the second power signal terminal VEE, so that the power module 10 discharges.

[0059] In some embodiments, as Figure 1 shown, the first turn-off module 40 includes: a third resistor ROFF1 and a third switching element Q3, and the second turn-off module 50 includes: a fourth resistor ROFF2 and a fourth switching element Q4. The first end of the third switching element Q3 is electrically connected to the second power signal terminal VEE, the second end of the third switching element Q3 is connected to the first end of the third resistor ROFF1, and the second end of the third resistor ROFF1 is electrically connected to the input terminal of the power module 10. The first end of the fourth switching element Q4 is electrically connected to the second power signal terminal VEE, the second end of the fourth switching element Q4 is connected to the first end of the fourth resistor ROFF2, and the second end of the fourth resistor ROFF2 is electrically connected to the input terminal of the power module 10.

[0060] In some embodiments, as Figure 1 shown, the drive circuit further includes: a first turn-on pin OUTH1, a second turn-on pin OUTH2, a first turn-off pin OUTL1, and a second turn-off pin OUTL2. The first end of the first turn-on pin OUTH1 is connected to the second end of the first switching element Q1. The second end of the first turn-on pin OUTH1 is connected to the first end of the first resistor RON1. The second end of the first resistor RON1 is electrically connected to the input end of the power module 10. The first end of the second turn-on pin OUTH2 is connected to the second end of the second switching element Q2. The second end of the second turn-on pin OUTH2 is connected to the first end of the second resistor RON2. The second end of the second resistor RON2 is electrically connected to the input end of the power module 10. The first end of the first turn-off pin OUTL1 is connected to the second end of the third switching element Q3. The second end of the first turn-off pin OUTL1 is connected to the first end of the third resistor ROFF1. The second end of the third resistor ROFF1 is electrically connected to the input end of the power module 10. The first end of the second turn-off pin OUTL2 is connected to the second end of the fourth switching element Q4. The second end of the second turn-off pin OUTL2 is connected to the first end of the fourth resistor ROFF2. The second end of the fourth resistor ROFF2 is electrically connected to the input end of the power module 10.

[0061] In some embodiments, the power module 10 includes: a power resistor RG_Internal.

[0062] It should be noted that the driving strength of the drive circuit can be controlled by the conduction or closing of the first conduction module 20, the second conduction module 30, the first turn-off module 40, and the second turn-off module 50.

[0063] In some embodiments, when the driving strength is the first driving strength, the first conduction module 20 is configured to conduct, so that the first power signal terminal VCC, the first switching element Q1, the first turn-on pin OUTH1, the first resistor RON1, and the power module 10 form a first turn-on loop; the first turn-off module 40 is configured to conduct, so that the second power signal terminal VEE, the third switching element Q3, the first turn-off pin OUTL1, the third resistor ROFF1, and the power module 10 form a first turn-off loop.

[0064] In some embodiments, when the driving strength is the second driving strength, the second conduction module 30 is configured to conduct, so that the first power signal terminal VCC, the second switching element Q2, the second turn-on pin OUTH2, the second resistor RON2, and the power module 10 form a second turn-on loop. The first conduction module 20 is configured to conduct, so that the second power signal terminal VEE, the fourth switching element Q4, the second turn-off pin OUTL2, the fourth resistor ROFF2, and the power module 10 form a second turn-off loop.

[0065] In some embodiments, when the driving strength is the third driving strength, both the first conduction module 20 and the second conduction module 30 are configured to conduct, so that the first power signal terminal VCC, the first switching element Q1, the first turn-on pin OUTH1, the first resistor RON1, the second switching element Q2, the second turn-on pin OUTH2, the second resistor RON2, and the power module 10 form a third turn-on loop. Both the first turn-off module 40 and the second turn-off module 50 are configured to conduct, so that the second power signal terminal VEE, the third switching element Q3, the first turn-off pin OUTL1, the third resistor ROFF1, the fourth switching element Q4, the second turn-off pin OUTL2, the fourth resistor ROFF2, and the power module 10 form a third turn-off loop.

[0066] The following specifically introduces the control method of the motor controller provided in this application in conjunction with the accompanying drawings.

[0067] It should be noted that the execution subject of the control method of the motor controller provided in this application can be the control device of the motor controller, and this device can be a vehicle. At the same time, this device can also be the central processing unit (CPU) of the vehicle, or the module in the device for controlling the motor controller, or the vehicle-mounted device in the vehicle. This application does not limit this. In the embodiments of this application, the control method of the motor controller executed by the vehicle is used as an example to illustrate the control method of the motor controller provided in the embodiments of this application.

[0068] Figure 2 As a schematic flow chart of an exemplary control method of a motor controller, it is applied to the above-mentioned drive circuit, as Figure 2 shown, the control method of this motor controller includes: S201. Obtain the current state information of the motor controller.

[0069] Among them, the current state information includes: the current current, the current voltage, and the current power.

[0070] S202. Adjust the conduction module states of the first conduction module and / or the second conduction module based on the current state information and the preset conduction control conditions, so as to adjust the driving strength of the motor controller.

[0071] Among them, the conduction module state is used to indicate whether the conduction module is conducting or disconnected.

[0072] Optionally, the preset conduction control conditions include: a first control condition and a second control condition. The first control condition is used to indicate that the current power is greater than or equal to the preset power threshold, and the second control condition is used to indicate that the current power is less than the preset power threshold.

[0073] In the embodiments of the present application, the driving strength includes: a first preset driving strength and a second preset driving strength.

[0074] In a possible implementation manner, when the current state information satisfies the first control condition, control the first conduction module or the second conduction module to conduct, so as to adjust the driving strength of the motor controller to the first preset driving strength. When the current state information satisfies the second control condition, control the first conduction module and the second conduction module, or the first conduction module to conduct, so as to adjust the driving strength of the motor controller to the second preset driving strength.

[0075] It can be understood that when the current state information of the motor controller satisfies the first control condition, the current power of the motor controller is greater than or equal to the preset power threshold, then the device temperature in the motor controller is relatively high. At this time, by controlling the first conduction module or the second conduction module to conduct, the driving strength of the motor controller can be adjusted to the second preset driving strength, so as to avoid damaging the devices in the motor controller and thus affecting the efficiency of the motor controller. When the current state information of the motor controller satisfies the second control condition, the current power of the motor controller is less than the preset power threshold, then the device temperature in the motor controller is relatively low. At this time, by controlling the first conduction module and the second conduction module, or the first conduction module to conduct, the driving strength of the motor controller can be adjusted to the first preset driving strength, so as to reduce the switching loss of the power module, improve the efficiency of the motor controller, and will not damage the devices in the motor controller.

[0076] Optionally, the first control condition includes: a first preset conduction condition. The first preset conduction condition includes at least one of the following: the current voltage is greater than or equal to a first voltage threshold, and the current is greater than or equal to a first current threshold. The current voltage is greater than or equal to the first voltage threshold, and the current is greater than or equal to a second current threshold, and the current is less than the first current threshold, and the current power is greater than or equal to a preset power threshold. The current voltage is greater than or equal to the first voltage threshold, and the current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to a second voltage threshold, and the current voltage is less than the first voltage threshold, and the current is greater than or equal to the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current is greater than or equal to the first current threshold, and the current power is greater than or equal to the preset power threshold.

[0077] In an embodiment of the present application, the first preset driving intensity includes: a first driving intensity and a second driving intensity.

[0078] In a possible design, when the current state information satisfies a second preset conduction condition, the second conduction module is controlled to conduct, so as to adjust the driving intensity of the motor controller to a third driving intensity.

[0079] It can be understood that when the current voltage or the current of the motor controller is relatively large, the current power is greater than or equal to the preset power threshold. At this time, the device temperature of the motor controller is the highest. Adjusting the driving intensity of the motor controller to the first preset driving intensity can cool the device of the motor controller and avoid damage to the device of the motor controller.

[0080] Optionally, the second control condition includes: a second preset conduction condition. The second preset conduction condition includes at least one of the following: the current voltage is greater than or equal to the first voltage threshold, and the current is less than the second current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current is less than the second current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current is greater than or equal to the second current threshold, and the current is less than the first current threshold, and the current power is less than the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current is less than the second current threshold.

[0081] In an embodiment of the present application, the second preset driving intensity includes: a second driving intensity and a third driving intensity.

[0082] In a possible design, when the current state information meets the first preset conduction condition, control the first conduction module and the second conduction module to conduct, so as to adjust the driving strength of the motor controller to the first driving strength.

[0083] It can be understood that the current power of the motor controller can be determined through the current voltage and the current current of the motor controller. When the current voltage or the current current of the motor controller is small, the current power is less than the preset power threshold. At this time, the device temperature of the motor controller is the lowest. Adjusting the driving strength of the motor controller to the second preset driving strength can reduce the switching loss of the power module and improve the efficiency of the motor controller.

[0084] Optionally, the first control condition further includes: a third preset conduction condition, and the second control condition further includes: a third preset conduction condition. The third preset conduction condition includes at least one of the following: the current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is less than or equal to the second voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold. The current voltage is greater than or equal to the first voltage threshold, and the current current is greater than or equal to the second current threshold and the current current is less than the first current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold. The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current current is greater than or equal to the second current threshold, and the current current is less than the first current threshold.

[0085] In a possible design, when the current state information meets the third preset conduction condition, control the first conduction module to conduct, so as to adjust the driving strength of the motor controller to the second driving strength.

[0086] It can be understood that when any two of the current voltage, the current current, and the current power of the motor controller are relatively large, the device temperature of the motor controller is in an intermediate state at this time. By adjusting the driving strength of the motor controller, while improving the efficiency of the motor controller, the device of the motor controller can be cooled down to avoid damage to the device of the motor controller.

[0087] It should be noted that this application does not limit the first voltage threshold, the second voltage threshold, the first current threshold, the second current threshold, and the preset power threshold. For example, the first voltage threshold and the second voltage threshold can be obtained based on the double-pulse test of the power module. When the current voltage is equal to the first voltage threshold, adjusting the driving intensity of the motor controller to the first driving intensity, the second driving intensity, and the third driving intensity will not damage the motor controller. When the current voltage is equal to the second voltage threshold, adjusting the driving intensity of the motor controller to the first driving intensity will not damage the motor controller. For another example, the first current threshold is the rated current that the power module can output, and the second current threshold is the peak current that the power module can output. For another example, the preset power threshold is the instantaneous power across the power module (i.e., the instantaneous power that the power module can withstand).

[0088] In this way, by making real-time judgments on the current current, current voltage, and current power through the first voltage threshold, the second voltage threshold, the first current threshold, the second current threshold, and the preset power threshold, the driving intensity of the motor controller can be accurately adjusted.

[0089] It can be understood that by dividing the driving intensity into multiple levels of driving intensity, the driving current of the motor controller can be adjusted according to different levels of driving intensity, thereby improving the driving efficiency of the motor controller, reducing the heat loss of the power module, improving the product cooling performance requirements, and the thermal fatigue cycle life.

[0090] Based on the above technical solutions, according to the current state information and the preset conduction control conditions, adjusting the conduction module state of the first conduction module and / or the second conduction module can adjust the driving current of the motor controller, thereby adjusting the driving intensity of the motor controller. Moreover, by considering the effects of current, voltage, and power on the motor controller simultaneously, the driving intensity of the motor controller can be adjusted more accurately, thereby reducing the power loss of the motor controller and improving the efficiency of the electrode controller.

[0091] It should be noted that to avoid the driving circuit frequently adjusting the driving intensity of the motor controller, resulting in abnormalities in the motor controller, the driving intensity of the motor controller can be adjusted after the changes in the current current and current voltage of the motor controller exceed a certain range.

[0092] Exemplarily, such as Figure 3As shown, with voltage as the abscissa and current as the ordinate, it shows the first hysteresis current difference (i.e., I01) and the second hysteresis current difference (i.e., I02). The first preset current difference (i.e., I1 - I01) can be obtained, and the first preset current difference is the difference between the first current threshold (i.e., I1) and the first hysteresis current difference. When the current is greater than the first preset current difference, based on the current voltage, current power, and preset conduction control conditions, the conduction module states of the first conduction module and / or the second conduction module can be adjusted to adjust the driving strength of the motor controller. Or, the second preset current difference (i.e., I2 - I02) can be obtained, and the first preset current difference is the difference between the second current threshold (i.e., I2) and the second hysteresis current difference. When the current is greater than the first preset current difference, based on the current state information and preset conduction control conditions, the conduction module states of the first conduction module and / or the second conduction module can be adjusted to adjust the driving strength of the motor controller.

[0093] It should be noted that this application places no restrictions on the first hysteresis current difference and the second hysteresis current difference. For example, the first hysteresis current difference and the second hysteresis current difference can be set according to the current acquisition accuracy and the maximum current.

[0094] Exemplarily, as Figure 3 shown, it shows the first hysteresis voltage difference U01 and the second hysteresis voltage difference U02. The first preset voltage difference (i.e., U1 - U01) can be obtained, and the first preset voltage difference is the difference between the first voltage threshold (i.e., U1) and the first hysteresis voltage difference. When the current voltage is greater than the first preset voltage difference, based on the current current, current power, and preset conduction control conditions, the conduction module states of the first conduction module and / or the second conduction module can be adjusted to adjust the driving strength of the motor controller. The second preset voltage difference (i.e., U2 - U02) can be obtained, and the first preset voltage difference is the difference between the second voltage threshold (i.e., U2) and the second hysteresis voltage difference. When the current voltage is greater than the first preset voltage difference, based on the current state information and preset conduction control conditions, the conduction module states of the first conduction module and / or the second conduction module can be adjusted to adjust the driving strength of the motor controller.

[0095] It should be noted that the first hysteresis voltage difference and the second hysteresis voltage difference can be set according to the voltage acquisition accuracy and the highest voltage.

[0096] The control method of the motor controller will be introduced below with specific examples.

[0097] Exemplarily, as Figure 3As shown, when the current is greater than or equal to the second current threshold, if the current voltage is less than the first voltage threshold, adjust the driving strength of the motor controller to the first driving strength I or the third driving strength III; if the current voltage is greater than or equal to the first voltage threshold and less than the second voltage threshold, adjust the driving strength of the motor controller to the first driving strength I or the second driving strength II; if the current voltage is less than the second voltage threshold, adjust the driving strength of the motor controller to the first driving strength I.

[0098] When the current is greater than or equal to the first current threshold and less than the first current threshold, if the current voltage is less than the first voltage threshold, adjust the driving strength of the motor controller to the second driving strength II or the third driving strength III; if the current voltage is greater than or equal to the first voltage threshold and less than the second voltage threshold, adjust the driving strength of the motor controller to the second driving strength II; if the current voltage is less than the second voltage threshold, adjust the driving strength of the motor controller to the first driving strength I or the second driving strength II.

[0099] When the current is less than the first current threshold, if the current voltage is less than the first voltage threshold, adjust the driving strength of the motor controller to the third driving strength III; if the current voltage is greater than or equal to the first voltage threshold and less than the second voltage threshold, adjust the driving strength of the motor controller to the second driving strength II or the third driving strength III; if the current voltage is less than the second voltage threshold, adjust the driving strength of the motor controller to the first driving strength I or the third driving strength III.

[0100] As Figure 4 shown, exemplarily, after the electric drive system completes low-voltage power-on and there is no abnormality after initialization. Then, the electric drive system starts to apply high voltage. After self-checking without abnormality, it starts torque output. Then, the current voltage can be judged. If the current voltage is less than the first voltage threshold, judge the current and / or the current power. If the current is greater than or equal to the first current threshold, less than the second current threshold, and the current power is greater than or equal to the preset power threshold, the driving strength of the motor controller can be adjusted to the second driving strength; if the current is greater than or equal to the first current threshold, less than the second current threshold, and the current power is less than the preset power threshold, the driving strength of the motor controller can be adjusted to the third driving strength. If the current is greater than or equal to the second current threshold and the current power is greater than or equal to the preset power threshold, the driving strength of the motor controller can be adjusted to the first driving strength; if the current is greater than or equal to the second current threshold and the current power is less than the preset power threshold, the driving strength of the motor controller can be adjusted to the third driving strength. If the current is less than the first current threshold, the driving strength of the motor controller can be adjusted to the third driving strength.

[0101] As Figure 5 shown, exemplarily, after the electric drive system completes low-voltage power-on and has no abnormality after initialization, the electric drive system then starts to apply high voltage. After self-checking without abnormality, it starts torque output. Then, the electric drive system can judge the current voltage. If the current voltage is greater than or equal to the first voltage threshold and less than the second voltage threshold, the electric drive system judges the current current and / or the current power. If the current current is greater than or equal to the first current threshold and less than the second current threshold, the electric drive system can adjust the driving strength of the motor controller to the second driving strength. If the current current is greater than or equal to the second current threshold and the current power is greater than or equal to the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the first driving strength; if the current current is greater than or equal to the second current threshold and the current power is less than the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the second driving strength. If the current current is less than the first current threshold and the current power is greater than or equal to the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the second driving strength; if the current current is less than the first current threshold and the current power is less than the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the third driving strength.

[0102] As Figure 6 shown, exemplarily, after the electric drive system completes low-voltage power-on and has no abnormality after initialization, the electric drive system then starts to apply high voltage. After self-checking without abnormality, it starts torque output. Then, the electric drive system can judge the current voltage. If the current voltage is greater than or equal to the second voltage threshold, the electric drive system judges the current current and / or the current power. If the current current is greater than or equal to the first current threshold, less than the second current threshold, and the current power is greater than or equal to the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the first driving strength; if the current current is greater than or equal to the first current threshold, less than the second current threshold, and the current power is less than the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the second driving strength. If the current current is greater than or equal to the second current threshold, the electric drive system can adjust the driving strength of the motor controller to the first driving strength. If the current current is less than the first current threshold and the current power is greater than or equal to the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the first driving strength; if the current current is less than the first current threshold and the current power is less than the preset power threshold, the electric drive system can adjust the driving strength of the motor controller to the third driving strength.

[0103] The above mainly introduced the solution provided by the embodiments of the present application from the perspective of methods. To implement the above functions, the control device of the motor controller includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0104] The embodiments of the present application can divide the functional modules of the control device of the motor controller according to the above method. For example, the control device of the motor controller can include each functional module corresponding to each function division, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0105] Referring to Figure 7 , the control device of the motor controller includes an acquisition module 701 and a processing module 702.

[0106] The acquisition module 701 is used to acquire the current state information of the motor controller, and the current state information includes: the current current, the current voltage, and the current power.

[0107] The processing module 702 is used to adjust the conduction module state of the first conduction module and / or the second conduction module based on the current state information and the preset conduction control conditions, so as to adjust the driving intensity of the motor controller, and the conduction module state is used to indicate whether the conduction module is conducting or disconnected.

[0108] Regarding the device in the above embodiments, the specific ways in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0109] As Figure 8 shown, the control device of the motor controller includes but is not limited to: a processor 801 and a memory 802.

[0110] Among them, the above-mentioned memory 802 is used to store the executable instructions of the above-mentioned processor 801. It can be understood that the above-mentioned processor 801 is configured to execute instructions to implement the control method of the motor controller in the above embodiments.

[0111] It should be noted that those skilled in the art can understand that Figure 8 the control device structure of the motor controller shown in Figure 8 does not constitute a limitation on the control device of the motor controller. The control device of the motor controller may include more or fewer components than

[0112] shown, or combine certain components, or have different component arrangements.

[0113] The processor 801 is the control center of the control device of the motor controller, connecting various parts of the entire control device of the motor controller through various interfaces and lines. By running or executing software programs and / or modules stored in the memory 802, and calling data stored in the memory 802, it executes various functions of the control device of the motor controller and processes data, thereby monitoring the control device of the motor controller as a whole. The processor 801 may include one or more processing units. Optionally, the processor 801 may integrate an application processor and a modulation / demodulation processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modulation / demodulation processor mainly processes wireless communication. It can be understood that the above modulation / demodulation processor may not be integrated into the processor 801 either.

[0114] In an exemplary embodiment, the present application embodiment also provides a vehicle, which includes the control device of the motor controller. The vehicle can execute to complete the method in the above embodiment through the control device of the motor controller.

[0115] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 802 including instructions. The above instructions can be executed by the processor 801 of the control device of the motor controller to implement the method in the above embodiment.

[0116] In actual implementation, Figure 7 the functions of the acquisition module 701 and the processing module 702 in Figure 8 can both be implemented by the processor 801 in

[0117] calling the computer program stored in the memory 802. The specific execution process can refer to the description of the method part in the above embodiment, which will not be elaborated here.Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, a floppy disk, and an optical data storage device, etc.

[0118] In an exemplary embodiment, the embodiment of the present application further provides a computer program product including one or more instructions, and the one or more instructions can be executed by a processor 801 of a control device of a motor controller to complete the method in the above embodiment.

[0119] It should be noted that when the instructions in the above computer-readable storage medium or the one or more instructions in the computer program product are executed by the processor of the control device of the motor controller, each process of the above method embodiment is implemented, and the same technical effects as the above method can be achieved. To avoid repetition, it will not be described in detail here.

[0120] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional module is used as an example. In actual application, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0121] In several embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0122] The units described as separate components may or may not be physically separated. The components displayed as units may be one physical unit or multiple physical units, that is, they can be located in one place, or they can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0123] In addition, in each embodiment of the present application, each functional unit can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0124] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0125] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A driving circuit, characterized in that, Comprising: A power module (10); A first conduction module (20), a first end of the first conduction module (20) being electrically connected to a first power signal terminal (VCC), and a second end of the first conduction module (20) being electrically connected to an input end of the power module (10); A second conduction module (30), a first end of the second conduction module (30) being electrically connected to the first power signal terminal (VCC), a second end of the second conduction module (30) being electrically connected to the input end of the power module (10), and a resistance value of the second conduction module (30) being smaller than a resistance value of the first conduction module (20); Wherein, when the first conduction module (20) is configured to be in a conducting state, the power module (10) and the first conduction module (20) form a first conduction loop, and a driving strength of the driving circuit is a first driving strength; when the second conduction module (30) is configured to be in a conducting state, the power module (10) and the second conduction module (30) form a second conduction loop, and the driving strength of the driving circuit is a second driving strength; when both the first conduction module (20) and the second conduction module (30) are configured to be in a conducting state, the power module (10), the first conduction module (20) and the second conduction module (30) form a third conduction loop, and the driving strength of the driving circuit is a third driving strength.

2. The drive circuit according to claim 1, characterized in that The first conduction module (20) comprises: a first resistor (RON1), and the second conduction module (30) comprises: a second resistor (RON2); A first end of the first resistor (RON1) is electrically connected to the first power signal terminal (VCC), and a second end of the first resistor (RON1) is electrically connected to the input end of the power module (10); A first end of the second resistor (RON2) is electrically connected to the first power signal terminal (VCC), a second end of the second resistor (RON2) is electrically connected to the input end of the power module (10), and the resistance value of the second resistor (RON2) is smaller than the resistance value of the first resistor (RON1).

3. The drive circuit according to claim 2, wherein, The first conduction module (20) further comprises: a first switching element (Q1), and the second conduction module (30) further comprises: a second switching element (Q2); A first end of the first switching element (Q1) is electrically connected to the first power signal terminal (VCC), a second end of the first switching element (Q1) is connected to a first end of the first resistor (RON1), and a second end of the first resistor (RON1) is electrically connected to the input end of the power module (10); A first end of the second switching element (Q2) is electrically connected to the first power signal terminal (VCC), a second end of the second switching element (Q2) is connected to a first end of the second resistor (RON2), and a second end of the second resistor (RON2) is electrically connected to the input end of the power module (10).

4. The drive circuit according to any one of claims 1-3, characterized in that, The driving circuit further comprises: A first turn-off module (40), a first end of the first turn-off module (40) is electrically connected to a second power signal terminal (VEE), and a second end of the first turn-off module (40) is electrically connected to an input end of the power module (10); A second turn-off module (50), a first end of the second turn-off module (50) is electrically connected to the second power signal terminal (VEE), and a second end of the second turn-off module (50) is electrically connected to the input end of the power module (10).

5. A control method for a motor controller, characterized in that, Applied to the drive circuit according to any one of claims 1 to 4; The control method of the motor controller includes: Obtaining current state information of the motor controller, the current state information including: current current, current voltage, and current power; Based on the current state information and a preset conduction control condition, adjusting the conduction module state of the first conduction module and / or the second conduction module to adjust the driving strength of the motor controller, where the conduction module state is used to indicate whether the conduction module is conducting or turned off.

6. The control method of the motor controller according to claim 5, characterized in that, The preset conduction control condition includes: a first control condition and a second control condition, the first control condition is used to indicate that the current power is greater than or equal to a preset power threshold, and the second control condition is used to indicate that the current power is less than the preset power threshold; The adjusting the conduction module state of the first conduction module and / or the second conduction module based on the current state information and the preset conduction control condition includes: When the current state information satisfies the first control condition, controlling the first conduction module or the second conduction module to conduct; When the current state information satisfies the second control condition, controlling the first conduction module and the second conduction module, or the second conduction module to conduct.

7. The control method of the motor controller according to claim 6, characterized in that, The first control condition includes: a first preset conduction condition, and the first preset conduction condition corresponds to the first conduction module conducting; the first preset conduction condition includes at least one of the following: The current voltage is greater than or equal to a first voltage threshold, and the current current is greater than or equal to a first current threshold; The current voltage is greater than or equal to the first voltage threshold, the current current is greater than or equal to a second current threshold, the current current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold; The current voltage is greater than or equal to the first voltage threshold, the current current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold; The current voltage is greater than or equal to a second voltage threshold, the current voltage is less than the first voltage threshold, the current current is greater than or equal to the first current threshold, and the current power is greater than or equal to the preset power threshold; The current voltage is less than or equal to the second voltage threshold, the current current is greater than or equal to the first current threshold, and the current power is greater than or equal to the preset power threshold.

8. The control method of the motor controller according to claim 6, characterized in that, The second control condition includes: a second preset conduction condition, and the second preset conduction condition corresponds to the conduction of the first conduction module and the second conduction module; The second preset conduction condition includes at least one of the following: The current voltage is greater than or equal to a first voltage threshold, and the current is less than a second current threshold, and the current power is less than the preset power threshold; The current voltage is greater than or equal to a second voltage threshold, and the current voltage is less than the first voltage threshold, and the current is less than the second current threshold, and the current power is less than the preset power threshold; The current voltage is less than or equal to the second voltage threshold, and the current is greater than or equal to a first current threshold, and the current power is less than the preset power threshold; The current voltage is less than or equal to the second voltage threshold, and the current is greater than or equal to the second current threshold, and the current is less than the first current threshold, and the current power is less than the preset power threshold; The current voltage is less than or equal to the second voltage threshold, and the current is less than the second current threshold.

9. The control method of the motor controller according to claim 7 or 8, characterized in that The first control condition further includes: a third preset conduction condition, and the second control condition further includes: a third preset conduction condition, and the third preset conduction condition corresponds to the conduction of the second conduction module; The third preset conduction condition includes at least one of the following: The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current is less than the second current threshold, and the current power is greater than or equal to the preset power threshold; The current voltage is less than or equal to the second voltage threshold, and the current is greater than or equal to the second current threshold, and the current is less than the first current threshold, and the current power is greater than or equal to the preset power threshold; The current voltage is greater than or equal to the first voltage threshold, and the current is greater than or equal to the second current threshold and the current is less than the first current threshold, and the current power is less than the preset power threshold; The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current is greater than or equal to the first current threshold, and the current power is less than the preset power threshold; The current voltage is greater than or equal to the second voltage threshold, and the current voltage is less than the first voltage threshold, and the current is greater than or equal to the second current threshold, and the current is less than the first current threshold.

10. A control device for a motor controller, which is applied to the control method of the motor controller according to any one of claims 5 to 9, characterized in that, The device includes an acquisition module and a processing module; The acquisition module is configured to acquire the current state information of the motor controller, and the current state information includes: current, current voltage, and current power; The processing module is configured to adjust the conduction module states of the first conduction module and / or the second conduction module based on the current state information and a preset conduction control condition, so as to adjust the driving strength of the motor controller, where the conduction module states are used to indicate whether the conduction modules are conducting or disconnected.

11. A control device for a motor controller, characterized in that, Comprising: A processor; A memory for storing executable instructions of the processor; Wherein, the processor is configured to execute the instructions to implement the control method of the motor controller according to any one of claims 5 to 9.

12. A vehicle, characterized in that, The vehicle includes the control device of the motor controller according to claim 10.

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