Motor drive control circuit, motor controller, compressor and vehicle

Abstract

The present invention discloses a motor drive control circuit, a motor controller, a compressor and a vehicle. The motor drive control circuit includes a power supply unit, a drive unit, a control unit and a drive fault protection unit. The power supply unit is used to provide a drive power supply and a control power supply to the drive unit and the control unit respectively. The control unit is used to output a control signal to the drive unit according to the control power supply. The drive unit is used to drive the switching tubes in the inverter circuit to turn on or off according to the drive power supply when receiving the control signal. The drive fault protection unit is used to control the drive power supply to stop supplying power to the drive unit when a short circuit fault occurs in the drive unit, so that the power supply unit maintains supplying the control power supply to the control unit. The control unit maintains external communication when determining that a short circuit fault occurs in the drive unit to output drive fault information, thereby effectively solving the problem that the microcontroller cannot maintain external communication when a short circuit fault occurs in the drive circuit in the related art.

Description

Technical Field

[0001] The present invention relates to the technical field of motor control, and particularly to a motor drive control circuit, a motor controller, a compressor, and a vehicle. Background Art

[0002] Currently, in a motor control system, the driving power (supplied to a drive circuit) and the control power (supplied to a microcontroller) required by an inverter are both obtained by converting a low-voltage power supply through an isolated switch power supply.

[0003] The drawback of this power supply method is that when a short-circuit fault occurs in the drive circuit, the isolated switch power supply will enter a short-circuit protection state to pull down the driving power supplied to the drive circuit. Since the driving power and the control power use the same transformer, the control power supplied to the microcontroller is synchronously pulled down, causing the microcontroller to lose power and unable to maintain external communication, thus preventing the outside from obtaining the working state and fault situation of the motor control system in a timely manner, which is not conducive to the overall control of the product where the motor control system is located. For example, when the motor control system is applied to a vehicle, it is not conducive to the overall vehicle control. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the first object of the present invention is to propose a motor drive control circuit. When a short-circuit fault occurs in a drive unit, a drive fault protection unit controls a drive power supply to stop supplying power to the drive unit, so that a power supply unit can maintain supplying control power to a control unit, enabling the control unit to maintain external communication and output drive fault information when it determines that a short-circuit fault has occurred in the drive unit, effectively solving the problem that the microcontroller cannot maintain external communication when a short-circuit fault occurs in the drive circuit in the related art.

[0005] The second object of the present invention is to propose a motor controller.

[0006] The third object of the present invention is to propose a compressor.

[0007] The fourth object of the present invention is to propose a vehicle.

[0008] The fifth object of the present invention is to propose a drive short-circuit protection method for a motor drive control circuit.

[0009] To achieve the above object, an embodiment of the first aspect of the present invention provides a motor drive control circuit, including a power supply unit, a drive unit, a control unit, and a drive fault protection unit. The power supply unit is configured to provide a drive power supply and a control power supply to the drive unit and the control unit respectively. The control unit is configured to output a control signal to the drive unit according to the control power supply. The drive unit is configured to drive the switch tube in the inverter circuit to turn on or off according to the drive power supply when receiving the control signal. The drive fault protection unit is configured to control the drive power supply to stop supplying power to the drive unit when a short-circuit fault occurs in the drive unit, so that the power supply unit maintains supplying the control power supply to the control unit, and the control unit maintains external communication when determining that a short-circuit fault occurs in the drive unit to output drive fault information.

[0010] According to the motor drive control circuit of the embodiment of the present invention, when a short-circuit fault occurs in the drive unit, the drive fault protection unit controls the drive power supply to stop supplying power to the drive unit to protect the drive unit. At the same time, the power supply unit maintains supplying the control power supply to the control unit, so that the control unit can also maintain external communication and output drive fault information when a short-circuit fault occurs in the drive unit, effectively solving the problem that in the related art, when a short-circuit fault occurs in the drive circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in time.

[0011] According to an embodiment of the present invention, the drive fault protection unit includes: a first voltage regulator power supply, which is connected between the drive power supply and the drive unit. The first voltage regulator power supply is configured to stop supplying power to the drive unit when a short-circuit fault occurs in the drive unit and output a drive short-circuit fault signal to the control unit.

[0012] According to an embodiment of the present invention, the control unit is further configured to control the first voltage regulator power supply to stop working when receiving the drive short-circuit fault signal.

[0013] According to an embodiment of the present invention, the drive fault protection unit includes: a second voltage regulator power supply, which is connected between the drive power supply and the drive unit. The second voltage regulator power supply is configured to stop supplying power to the drive unit when a short-circuit fault occurs in the drive unit; a voltage detection module, which is configured to detect the output voltage of the second voltage regulator power supply and provide the output voltage to the control unit, so that the control unit determines that a short-circuit fault occurs in the drive unit and outputs a drive short-circuit fault signal through external communication according to the output voltage.

[0014] According to an embodiment of the present invention, the control unit is further configured to control the second voltage regulator power supply to stop working when determining that a short-circuit fault occurs in the drive unit.

[0015] According to an embodiment of the present invention, the drive fault protection unit includes: a controllable switch connected between a drive power supply and a drive unit, and a control terminal of the controllable switch is connected to a control unit to be closed or opened under the control of the control unit; wherein, when a short-circuit fault occurs in the drive unit, the power supply unit stops providing the drive power supply and the control power supply, the control unit is powered down, the controllable switch is opened, after the power supply unit resumes providing the drive power supply and the control power supply, the control unit is powered up and controls the controllable switch to be closed, due to the short-circuit fault occurring in the drive unit, the power supply unit stops providing the drive power supply and the control power supply again, the control unit is powered down, the controllable switch is opened, and so on, until the control unit determines that when a short-circuit fault occurs in the drive unit according to the power-up times, controls the controllable switch to remain open, and outputs a drive short-circuit fault signal through external communication.

[0016] To achieve the above object, an embodiment of the second aspect of the present invention provides a motor controller, including: an inverter circuit; the aforementioned motor drive control circuit, which is used to drive the conduction or cut-off of the switching tubes in the inverter circuit, and when a short-circuit fault occurs in the drive unit, maintain external communication through the control unit to output drive fault information.

[0017] The motor controller according to the embodiment of the present invention adopts the aforementioned motor drive control circuit. When a short-circuit fault occurs in the drive unit, the drive fault protection unit controls the drive power supply to stop supplying power to the drive unit to protect the drive unit, and at the same time enables the power supply unit to maintain supplying the control power supply to the control unit, so that the control unit can also maintain external communication when a short-circuit fault occurs in the drive unit and output drive fault information, effectively solving the problem that in the related art, when a short-circuit fault occurs in the drive circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in time.

[0018] To achieve the above object, an embodiment of the third aspect of the present invention provides a compressor, including a motor; the aforementioned motor controller, which is used to drive the motor to operate.

[0019] The compressor according to the embodiment of the present invention adopts the aforementioned motor controller. When a short-circuit fault occurs in the drive unit, the drive fault protection unit controls the drive power supply to stop supplying power to the drive unit to protect the drive unit, and further protect the compressor. At the same time, the power supply unit is enabled to maintain supplying the control power supply to the control unit, so that the control unit can also maintain external communication when a short-circuit fault occurs in the drive unit and output drive fault information, effectively solving the problem that in the related art, when a short-circuit fault occurs in the drive circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in time, which is beneficial to the overall control of the product where the compressor is located.

[0020] To achieve the above object, an embodiment of the fourth aspect of the present invention provides a vehicle, including the compressor described above.

[0021] For the vehicle according to the embodiment of the present invention, by using the compressor described above, when a short - circuit fault occurs in the driving unit, the driving fault protection unit controls the driving power supply to stop supplying power to the driving unit to protect the driving unit. At the same time, the power supply unit maintains supplying the control power to the control unit, so that the control unit can still maintain external communication and output driving fault information when a short - circuit fault occurs in the driving unit. This effectively solves the problem in the related art that when a short - circuit fault occurs in the driving circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in time, which is beneficial to the overall vehicle control of the vehicle.

[0022] To achieve the above object, an embodiment of the fifth aspect of the present invention provides a driving short - circuit protection method for a motor driving control circuit. The motor driving control circuit includes a power supply unit, a driving unit, and a control unit. The power supply unit is used to supply driving power and control power to the driving unit and the control unit respectively. The control unit is used to output a control signal to the driving unit according to the control power. The driving unit is used to drive the switch tube in the inverter circuit to turn on or off according to the driving power when receiving the control signal. The method includes: when a short - circuit fault occurs in the driving unit, controlling the driving power supply to stop supplying power to the driving unit, so that the power supply unit maintains supplying the control power to the control unit; when the control unit determines that a short - circuit fault occurs in the driving unit, it maintains external communication to output driving fault information.

[0023] For the driving short - circuit protection method of the motor driving control circuit according to the embodiment of the present invention, when a short - circuit fault occurs in the driving unit, it controls the driving power supply to stop supplying power to the driving unit to protect the driving unit. At the same time, the power supply unit maintains supplying the control power to the control unit, so that the control unit can still maintain external communication and output driving fault information when a short - circuit fault occurs in the driving unit. This effectively solves the problem in the related art that when a short - circuit fault occurs in the driving circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in time.

[0024] According to an embodiment of the present invention, the motor driving control circuit includes a first voltage - stabilizing power supply connected between the driving power supply and the driving unit. Wherein, when a short - circuit fault occurs in the driving unit, the first voltage - stabilizing power supply stops supplying power to the driving unit and outputs a driving short - circuit fault signal to the control unit.

[0025] According to an embodiment of the present invention, when the control unit receives the driving short - circuit fault signal, it also controls the first voltage - stabilizing power supply to stop working.

[0026] According to an embodiment of the present invention, the motor drive control circuit includes a second regulated power supply connected between a drive power supply and a drive unit. When a short-circuit fault occurs in the drive unit, the second regulated power supply stops supplying power to the drive unit, detects the output voltage of the second regulated power supply, and provides the output voltage to a control unit, so that the control unit determines that a short-circuit fault has occurred in the drive unit based on the output voltage and outputs a drive short-circuit fault signal through external communication.

[0027] According to an embodiment of the present invention, when the control unit determines that a short-circuit fault has occurred in the drive unit, it also controls the second regulated power supply to stop working.

[0028] According to an embodiment of the present invention, the motor drive control circuit includes a controllable switch connected between a drive power supply and a drive unit. When a short-circuit fault occurs in the drive unit, the power supply unit stops providing the drive power supply and the control power supply, the control unit is powered down, the controllable switch is turned off. After the power supply unit resumes providing the drive power supply and the control power supply, the control unit is powered on and controls the controllable switch to close. Since a short-circuit fault has occurred in the drive unit, the power supply unit stops providing the drive power supply and the control power supply again, the control unit is powered down, and the controllable switch is turned off. This process is repeated until the control unit determines that a short-circuit fault has occurred in the drive unit based on the number of power-on times and controls the controllable switch to remain off, and outputs a drive short-circuit fault signal through external communication.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0030] Figure 1 Schematic structural diagram of a motor drive control circuit according to an embodiment of the present invention;

[0031] Figure 2 Schematic structural diagram of a motor drive control circuit according to another embodiment of the present invention;

[0032] Figure 3 Schematic structural diagram of a motor drive control circuit according to yet another embodiment of the present invention;

[0033] Figure 4 Schematic structural diagram of a motor drive control circuit according to still another embodiment of the present invention;

[0034] Figure 5 Schematic structural diagram of a motor controller according to an embodiment of the present invention;

[0035] Figure 6 Schematic structural diagram of a compressor according to an embodiment of the present invention;

[0036] Figure 7 Schematic structural diagram of a vehicle according to an embodiment of the present invention;

[0037] Figure 8 Flowchart of a driving short - circuit protection method for a motor drive control circuit according to an embodiment of the present invention. Detailed implementation manners

[0038] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0039] The motor drive control circuit, motor controller, compressor, vehicle and driving short - circuit protection method of the motor drive control circuit according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0040] Figure 1 Schematic structural diagram of a motor drive control circuit according to an embodiment of the present invention.

[0041] Referring to Figure 1 as shown, the motor drive control circuit 100 includes: a power supply unit 110, a drive unit 120, a control unit 130, and a drive fault protection unit 140.

[0042] Among them, the power supply unit 110 is used to provide a drive power supply and a control power supply to the drive unit 120 and the control unit 130 respectively. The control unit 130 is used to output a control signal to the drive unit 120 according to the control power supply. The drive unit 120 is used to drive the switching tubes in the inverter circuit 200 to turn on or off according to the drive power supply when receiving the control signal. The drive fault protection unit 140 is used to control the drive power supply to stop supplying power to the drive unit 120 when a short - circuit fault occurs in the drive unit 120, so that the power supply unit 110 continues to supply the control power supply to the control unit 130. The control unit 130 maintains external communication when determining that a short - circuit fault has occurred in the drive unit 120 to output drive fault information.

[0043] Specifically, when the motor drive control circuit 100 is operating normally, the power supply unit 110 provides a control power supply to the control unit 130, enabling the control unit 130 to be powered on and output a control signal to the drive unit 120. At the same time, the power supply unit 110 also provides a drive power supply to the drive unit 120 through the drive fault protection unit 140, enabling the drive unit 120 to be powered on and control the switching tubes in the inverter circuit 200 to turn on or off according to the control signal input by the control unit 130, so that the inverter circuit 200 provides a working power supply for loads such as motors. During this process, when a short-circuit fault occurs in the drive unit 120, such as a short circuit at the input end of the drive unit 120, on the one hand, the drive fault protection unit 140 stops supplying the drive power supply to the drive unit 120 to protect the drive unit 120, and further realizes the protection of the entire circuit; on the other hand, it causes the power supply unit 110 not to generate short-circuit protection and continues to provide a control power supply to the control unit 130, enabling the control unit 130 to continue to work and maintain communication with the outside, so as to output the drive fault information of the motor drive circuit 100 to the outside, facilitating the outside to timely understand the fault status of the motor drive circuit 100, etc., thus being beneficial to the overall control of the product to which it is applied.

[0044] It should be noted that the power supply unit 110 can be a power supply unit composed of a low-voltage power supply and an isolating switch power supply, or it can be other power supply units where the change of the output drive power supply will affect the change of the control power supply. The specific structure is not limited here. The control unit 130 can include a microcontroller and a communication unit, and this communication unit can have an isolation function, that is, the communication unit can be an isolated communication unit to ensure the stability of signal transmission. The specific structure is not limited here.

[0045] In the above embodiment, when a short-circuit fault occurs in the drive unit, the drive fault protection unit controls the drive power supply to stop supplying power to the drive unit to protect the drive unit. At the same time, the power supply unit maintains supplying the control power supply to the control unit, enabling the control unit to maintain external communication and output fault information when a short-circuit fault occurs in the drive unit, effectively solving the problem that in the related art, when a short-circuit fault occurs in the drive circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in a timely manner, providing favorable conditions for the overall control of the product where it is located.

[0046] In some embodiments, referring to Figure 2 as shown, the drive fault protection unit 140 includes: a first voltage regulator power supply 141. The first voltage regulator power supply 141 is connected between the drive power supply and the drive unit 120. The first voltage regulator power supply 141 is used to stop supplying power to the drive unit 120 when a short-circuit fault occurs in the drive unit 120 and output a drive short-circuit fault signal to the control unit 130.

[0047] Specifically, when the motor drive control circuit 100 is operating normally, the power supply unit 110 supplies a drive power supply to the drive unit 120 through the first voltage regulator power supply 141, and at the same time supplies a control power supply to the control unit 130, so that the control unit 130 drives the switch tubes in the inverter circuit 200 to conduct or disconnect by controlling the operation of the drive unit 120, thereby supplying a working power supply to loads such as motors. For example, the isolating switch power supply in the power supply unit 110 converts the low-voltage power supply into a drive power supply and supplies it to the drive unit 120 through the first voltage regulator power supply 141, and at the same time converts the low-voltage power supply into a control power supply to supply power to the microcontroller in the control unit 130, so that the microcontroller drives the inverter circuit 200 to operate by controlling the drive unit 120.

[0048] During this process, when a short-circuit fault occurs in the drive unit 120, that is, when a short circuit occurs at the input end of the drive unit 120, the first voltage regulator power supply 141 will enter the short-circuit protection state. At this time, the first voltage regulator power supply 141 pulls down the voltage at its output end to protect the drive unit 120; at the same time, the voltage at the input end of the first voltage regulator power supply 141 remains unchanged, ensuring that the power supply unit 110 does not enter the short-circuit protection state, that is, remains in the normal working state, so as to ensure that the power supply unit 110 can continue to supply the control power supply to the control unit 130, enabling the control unit 130 to work normally and maintain communication connection with the outside; at the same time, the first voltage regulator power supply 141 also sends a drive short-circuit fault signal to the control unit 130 through the communication line with the control unit 130. Since the control unit 130 can work normally, it can receive this drive short-circuit fault signal and transmit it to the outside, so that the outside can timely learn about the fault state of the motor drive control circuit 100. For example, when the two input ends of the drive unit 120 are short-circuited, the first voltage regulator power supply 141 stops outputting voltage to the drive unit 120. Since the first voltage regulator power supply 141 stopping outputting voltage does not affect its input voltage, the isolating switch power supply does not enter the short-circuit protection state. The isolating switch power supply normally outputs the drive power supply to the first voltage regulator power supply 141. The first voltage regulator power supply 141 sends a drive short-circuit fault signal to the microcontroller. At the same time, the isolating switch power supply normally outputs the control power supply to the microcontroller. The microcontroller works normally and sends the drive short-circuit fault signal sent by the first voltage regulator power supply 141 to the outside through the isolation communication unit.

[0049] Furthermore, in some embodiments, the control unit 130 is further configured to control the first voltage regulator power supply 141 to stop working when receiving the drive short-circuit fault signal.

[0050] Specifically, continue to refer to Figure 2As shown, when the control unit 130 receives a driving short - circuit fault signal input from the first voltage - stabilizing power supply 141, the control unit 130 can actively control the first voltage - stabilizing power supply 141 to stop working through the enable signal line between the control unit 130 and the first voltage - stabilizing power supply 141, so as to avoid the problem that the first voltage - stabilizing power supply 141 is in a short - circuit protection state for a long time, resulting in too high power consumption and temperature rise. For example, the microcontroller outputs a non - enable signal (such as a low - level signal) to the first voltage - stabilizing power supply 141 through the enable signal line, so that the first voltage - stabilizing power supply 141 is in a stopped working state to reduce power consumption and temperature rise.

[0051] It should be noted that the type of the first voltage - stabilizing power supply 141 is not limited to a linear voltage - stabilizing power supply, and it can also be a switching power supply, etc. The first voltage - stabilizing power supply 141 has a short - circuit protection function.

[0052] In the above - mentioned embodiment, through the voltage - stabilizing power supply, when a short - circuit fault occurs in the driving unit, while short - circuit protection is carried out on the driving unit, it is ensured that the power - supply unit will not enter the short - circuit protection state, and the power supply to the control unit is maintained to ensure that the control unit communicates with the outside to transmit the internal - circuit fault information to the outside; at the same time, the control unit actively controls the voltage - stabilizing power supply to stop working, avoiding the problem that the voltage - stabilizing power supply is in a short - circuit protection state for a long time, resulting in too high power consumption and temperature rise.

[0053] In some other embodiments, as shown in Figure 3 the driving - fault protection unit 140 includes: a second voltage - stabilizing power supply 142 and a voltage - detection module 143. The second voltage - stabilizing power supply 142 is connected between the driving power supply and the driving unit 120, and the second voltage - stabilizing power supply 142 is used to stop supplying power to the driving unit 120 when a short - circuit fault occurs in the driving unit 120; the voltage - detection module 143 is used to detect the output voltage of the second voltage - stabilizing power supply 142 and provide the output voltage to the control unit 130, so that when the control unit 130 determines that a short - circuit fault has occurred in the driving unit 120 according to the output voltage, it outputs a driving short - circuit fault signal through external communication.

[0054] Specifically, when the motor - driving control circuit 100 is working normally, the power - supply unit 110 supplies a driving power supply to the driving unit 120 through the second voltage - stabilizing power supply 142, and at the same time supplies a control power supply to the control unit 130, so that the control unit 130 controls the driving unit 120 to work to drive the switch tubes in the inverter circuit 200 to conduct or disconnect, and then supplies a working power supply to loads such as motors. For example, the isolating - switch power supply in the power - supply unit 110 converts the low - voltage power supply into a driving power supply and provides it to the driving unit 120 through the second voltage - stabilizing power supply 142, and at the same time converts the low - voltage power supply into a control power supply to supply power to the microcontroller in the control unit 130, so that the microcontroller drives the inverter circuit 200 to work by controlling the driving unit 120.

[0055] During this process, when a short - circuit fault occurs in the drive unit 120, that is, when a short - circuit occurs at the input end of the drive unit 120, the second voltage - stabilizing power supply 142 will enter the short - circuit protection state. At this time, the second voltage - stabilizing power supply 142 pulls down the voltage at its output end to protect the drive unit 120; at the same time, the voltage at the input end of the second voltage - stabilizing power supply 142 remains unchanged, ensuring that the power - supply unit 110 does not enter the short - circuit protection state, that is, it maintains the normal working state, so as to ensure that the power - supply unit 110 can continue to provide the control power to the control unit 130, enabling the control unit 130 to work normally and maintain the communication connection with the outside. When the control unit 130 is working normally, the control unit 130 also detects the voltage at the output end of the second voltage - stabilizing power supply 142 through the voltage - detection module 143, and judges whether a short - circuit fault occurs in the drive unit 120 according to this voltage, such as whether the voltage is less than a certain value. When it is determined that a short - circuit fault occurs, a drive short - circuit fault signal is sent to the outside through the communication connection with the outside, so that the outside can timely learn about the fault state of the motor drive control circuit 100. For example, when the two input ends of the drive unit 120 are short - circuited, the second voltage - stabilizing power supply 142 stops outputting voltage to the drive unit 120. Since the second voltage - stabilizing power supply 142 stopping outputting voltage does not affect its input voltage, the isolated - switch power supply will not enter the short - circuit protection state. The isolated - switch power supply normally outputs the drive power to the second voltage - stabilizing power supply 142 and outputs the control power to the micro - controller. The micro - controller works normally and detects the voltage at the output end of the second voltage - stabilizing power supply 142 through the voltage - detection module 143. When the detected voltage is very small, the micro - controller sends a drive short - circuit fault signal to the outside through the isolated communication unit.

[0056] Further, in some embodiments, the control unit 130 is further configured to control the second voltage - stabilizing power supply 142 to stop working when it is determined that a short - circuit fault occurs in the drive unit 120.

[0057] Specifically, continuing to refer to Figure 3 As shown, when the control unit 130 determines that a short - circuit fault occurs in the drive unit 120 based on the voltage detected by the voltage - detection module 143, it can also actively control the second voltage - stabilizing power supply 142 to stop working through the enable signal line between the control unit 130 and the second voltage - stabilizing power supply 142, so as to avoid the second voltage - stabilizing power supply 142 being in the short - circuit protection state for a long time, resulting in too high power consumption and temperature rise. For example, the micro - controller outputs a non - enable signal (such as a low - level signal) to the second voltage - stabilizing power supply 142 through the enable signal line, so that the second voltage - stabilizing power supply 142 is in the stop - working state to reduce power consumption and temperature rise.

[0058] It should be noted that the type of the second voltage - stabilizing power supply 142 is not limited to a linear voltage - stabilizing power supply, and it can also be a switching power supply, etc. The second voltage - stabilizing power supply 142 has a short - circuit protection function.

[0059] In the above embodiments, when a short - circuit fault occurs in the driving unit, the regulated power supply can be used to protect the driving unit against short - circuit while ensuring that the power - supply unit does not enter the short - circuit protection state, maintaining the power supply to the control unit to ensure communication between the control unit and the outside. At the same time, when the control unit identifies a short - circuit fault based on the sampling value of the voltage - sampling module, it communicates with the outside to transmit the internal circuit fault information to the outside, and can also actively control the regulated power supply to stop working, avoiding the problems of excessive power consumption and temperature rise caused by the regulated power supply being in the short - circuit protection state for a long time.

[0060] In still other embodiments, referring to Figure 4 as shown, the drive - fault protection unit 140 includes: a controllable switch Q, which is connected between the drive power supply and the drive unit 120, and the control terminal of the controllable switch Q is connected to the control unit 130 to be closed or opened under the control of the control unit 130.

[0061] In this example, when a short - circuit fault occurs in the drive unit 120, the power - supply unit 110 stops providing the drive power supply and the control power supply, the control unit 130 powers down, the controllable switch Q opens. After the power - supply unit 110 resumes providing the drive power supply and the control power supply, the control unit 130 powers up and controls the controllable switch Q to close. Since a short - circuit fault occurs in the drive unit 120, the power - supply unit 110 stops providing the drive power supply and the control power supply again, the control unit 130 powers down, and the controllable switch Q opens. This repeats until the control unit 130 determines that a short - circuit fault has occurred in the drive unit 120 based on the number of power - up times, controls the controllable switch Q to remain open, and outputs a drive short - circuit fault signal through external communication.

[0062] Specifically, referring to Figure 4 as shown, when the motor drive control circuit 100 is working normally, the power - supply unit 110 provides the control power supply to the control unit 130. The control unit 130 works and controls the controllable switch Q to be in the closed state. The power - supply unit 110 provides the drive power supply to the drive unit 120 through the controllable switch Q. At this time, the control unit 130 controls the drive unit 120 to work to drive the switch tubes in the inverter circuit 200 to conduct or disconnect, thereby providing the working power supply to loads such as motors. For example, the isolating - switch power supply in the power - supply unit 110 converts the low - voltage power supply into the drive power supply and the control power supply for output. The micro - controller in the control unit 130 powers on and works according to the control power supply to control the controllable switch Q to close. The drive power supply supplies power to the drive unit 120 through the controllable switch Q, and the micro - controller drives the inverter circuit 200 to work by controlling the drive unit 120.

[0063] During this process, when a short-circuit fault occurs in the drive unit 120, that is, when a short circuit occurs at the input end of the drive unit 120, the power supply unit 110 enters the short-circuit protection state to pull down the drive power supply to protect the drive unit 120. At the same time, the control power supply is pulled down synchronously, and the control unit 130 is powered off. The control unit 130 cannot continue to output a control signal to the controllable switch Q to control it to be in the closed state, resulting in the disconnection of the controllable switch Q. After the controllable switch Q is disconnected, since the power supply unit 110 and the drive unit 120 are in the disconnected state, the power supply unit 110 will exit the short-circuit protection state and enter the normal working state, providing the drive power supply to the drive unit 120 again and providing the control power supply to the control unit 130. The control unit 130 is powered on and controls the controllable switch Q to close again, and at the same time records the power-on times. After the controllable switch Q is closed again, since the drive unit 120 is still in the short-circuit state, the power supply unit 110 will enter the short-circuit protection state again and stop providing the drive power supply to the drive unit 120 and the control power supply to the control unit 130. The control unit 130 is powered off again, and the controllable switch Q is disconnected again. This process repeats until the recorded power-on times reach a preset number (such as 3 times, etc.), and it is determined that the drive unit 120 has a short-circuit fault. At this time, the control unit 130 controls the controllable switch Q to be always in the disconnected state. Since the controllable switch Q is always in the disconnected state, the power supply unit 11 will continuously be in the normal working state and continuously provide the control power supply to the control unit 130, enabling the control unit 130 to be in the normal working state. At this time, the control unit 130 can send a drive short-circuit fault signal to the outside through its communication connection with the outside, so that the outside can timely learn about the internal fault situation of the circuit.

[0064] For example, when the two input ends of the drive unit 120 are short-circuited, the isolation switch power supply enters the short-circuit protection state to pull down the voltage of the drive power supply. The voltage of the control power supply is pulled down synchronously, the microcontroller is powered off, and the controllable switch Q is disconnected. After the controllable switch Q is disconnected, the isolation switch power supply exits the short-circuit protection state and continues to provide the drive power supply and the control power supply. The microcontroller is powered on, controls the controllable switch Q to close, and records the power-on times. Since the short circuit of the drive unit 120 still exists, the isolation switch power supply enters the short-circuit protection state again to pull down the voltage of the drive power supply. The voltage of the control power supply is pulled down synchronously, the microcontroller is powered off, and the controllable switch Q is disconnected. This cycle repeats until the power-on times of the microcontroller reach the preset number. The microcontroller determines that the drive unit 120 has a short-circuit fault. At this time, the controllable switch Q is kept in the disconnected state, and a drive short-circuit fault signal is sent to the outside through the isolation switch unit.

[0065] It should be noted that the above controllable switch Q can be a MOS transistor, etc., and there is no specific limitation here.

[0066] In the above embodiments, short-circuit protection of the drive unit can be achieved through a controllable switch. At the same time, based on the short-circuit protection characteristics of the power supply unit, the on / off control of the controllable switch is performed to detect short-circuit faults. And when the detection result is a short-circuit fault, by controlling the controllable switch to remain in the off state, the control unit is in a normal working state, so that the control unit can send a drive short-circuit fault signal to the outside.

[0067] In summary, for the motor drive control circuit according to the embodiments of the present invention, by providing a drive fault protection unit between the power supply unit and the drive unit, when a short-circuit fault occurs in the drive unit, not only can short-circuit protection of the drive unit be achieved, but also the control unit can be powered to maintain communication connection with the outside, and then send a drive short-circuit fault signal to the outside, so that the outside can timely understand the internal fault situation of the circuit, effectively solving the problem in the related art that when a drive circuit fails, the isolation switch power supply enters the short-circuit protection state, resulting in the microcontroller losing power supply, being unable to identify faults, and being unable to communicate externally, which is beneficial to the overall control of the product where the circuit is located.

[0068] In some embodiments, a motor controller is further provided.

[0069] Refer to Figure 5 As shown, the motor controller 1100 includes: an inverter circuit 200; the aforementioned motor drive control circuit 100, and the motor drive control circuit 100 is used to drive the on / off of the switching tubes in the inverter circuit 200, and when a short-circuit fault occurs in the drive unit, maintain external communication through the control unit to output drive fault information.

[0070] In some embodiments, the inverter circuit 200 can be a single-phase inverter circuit, a three-phase inverter circuit, etc., and specific limitations are not made here. During the process of the motor drive control circuit 100 driving the inverter circuit 200 to work, if a short-circuit fault occurs in the drive unit of the motor drive control circuit 100, such as a short circuit at the input end of the drive unit, the drive power output by the power supply unit will be stopped from supplying power to the drive unit through the drive fault protection unit to protect the drive unit. At the same time, the power supply unit can continue to provide control power to the control unit, enabling the control unit to maintain communication connection with the outside, and then output drive fault information externally, so that the outside can timely learn about the internal fault state of the motor controller.

[0071] The motor controller according to the embodiment of the present invention adopts the aforementioned motor drive control circuit. By arranging a drive fault protection unit between the power supply unit and the drive unit, when a short-circuit fault occurs in the drive unit, not only can the short-circuit protection of the drive unit be realized, but also the control unit can be powered to maintain its communication connection with the outside, and then the drive short-circuit fault signal can be sent to the outside, so that the outside can timely understand the internal fault situation of the circuit, effectively solving the problems in the related art that when a drive circuit fault occurs, the isolation switch power supply enters the short-circuit protection state, resulting in the microcontroller losing power supply, being unable to identify the fault, and being unable to communicate with the outside, thus being beneficial to the overall control of the product where the circuit is located.

[0072] In some embodiments, a compressor is also provided.

[0073] Referring Figure 6 As shown, the compressor 1200 includes: a motor M; the aforementioned motor controller 1100, and the motor controller 1100 is used to drive the motor M to operate.

[0074] In some embodiments, the compressor 1200 may be an electric compressor including a drive part and a compression part. The drive part in the electric compressor drives the compression part to perform compression work. For example, the drive part may include a motor M containing a rotor and a stator and the aforementioned motor controller 1100. The motor M is driven to operate by the motor controller 1100 to drive the compression part to perform compression work. Additionally, in some embodiments, the electric compressor may be a low back-pressure compressor, and the drive part may be arranged in a low-pressure cavity communicating with the suction port of the compressor, and the compression part may be arranged in a high-pressure cavity communicating with the discharge port of the compressor. Furthermore, in some embodiments, the electric compressor may be a horizontal compressor, and the drive part and the compression part may be arranged horizontally, etc.

[0075] During the process that the motor controller 1100 drives the motor M to operate to drive the compression part to perform compression work, when a short-circuit fault occurs in the drive unit inside the motor controller 1100, such as a short circuit at the input end of the drive unit, the drive power output by the power supply unit will be controlled to stop powering the drive unit through the drive fault protection unit to protect the drive unit. At the same time, the power supply unit can continue to provide control power to the control unit, enabling the control unit to maintain its communication connection with the outside, and then outputting the drive fault information to the outside so that the outside can timely learn the internal fault state of the compressor 1200.

[0076] The compressor according to the embodiment of the present invention adopts the aforementioned motor controller. By arranging a drive fault protection unit between the power supply unit and the drive unit, when a short - circuit fault occurs in the drive unit, not only can the short - circuit protection of the drive unit be realized, but also the control unit can be powered to keep its communication connection with the outside, and then the drive short - circuit fault signal can be sent to the outside, so that the outside can timely understand the internal fault situation of the circuit, effectively solving the problem in the related technology that when a drive circuit fails, the isolation switch power supply enters the short - circuit protection state, resulting in the microcontroller losing power supply, being unable to identify the fault and unable to communicate with the outside, thus being beneficial to the overall control of the product where the compressor is located.

[0077] In some embodiments, a vehicle is also provided.

[0078] Reference Figure 7 As shown, the vehicle 1300 includes the aforementioned compressor 1200.

[0079] In the embodiment of the present invention, the vehicle 1300 includes the compressor 1200 described in any of the above embodiments. The vehicle 1300 can be a new - energy vehicle. In some embodiments, the new - energy vehicle can be a pure - electric vehicle with an electric motor as the main driving force. In other embodiments, the new - energy vehicle can also be a hybrid vehicle with an internal combustion engine and an electric motor as the main driving forces at the same time. Regarding the internal combustion engine and the electric motor mentioned in the above embodiments for providing driving power for the new - energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way of providing electric energy for the electric motor can use power batteries, hydrogen fuel cells, etc., which are not specifically limited here. It should be noted that this is only an exemplary description of the structure of new - energy vehicles and the like, and does not limit the protection scope of the present invention.

[0080] The vehicle according to the embodiment of the present invention adopts the aforementioned compressor. By arranging a drive fault protection unit between the power supply unit and the drive unit, when a short - circuit fault occurs in the drive unit, not only can the short - circuit protection of the drive unit be realized, but also the control unit can be powered to keep its communication connection with the outside, and then the drive short - circuit fault signal can be sent to the outside, so that the outside can timely understand the internal fault situation of the circuit, effectively solving the problem in the related technology that when a drive circuit fails, the isolation switch power supply enters the short - circuit protection state, resulting in the microcontroller losing power supply, being unable to identify the fault and unable to communicate with the outside, thus being beneficial to the overall control of the vehicle.

[0081] In some embodiments, a drive short - circuit protection method for a motor drive control circuit is also provided.

[0082] Figure 8It is a flowchart of a driving short - circuit protection method for a motor drive control circuit according to an embodiment of the present invention. The motor drive control circuit includes a power supply unit, a drive unit, and a control unit. The power supply unit is used to provide a drive power supply and a control power supply to the drive unit and the control unit respectively. The control unit is used to output a control signal to the drive unit according to the control power supply. The drive unit is used to drive the switching tubes in the inverter circuit to turn on or off according to the drive power supply when receiving the control signal.

[0083] As shown in Figure 8 the driving short - circuit protection method may include:

[0084] Step S101, when a short - circuit fault occurs in the drive unit, control the drive power supply to stop supplying power to the drive unit, so that the power supply unit maintains supplying the control power supply to the control unit.

[0085] Step S102, when the control unit determines that a short - circuit fault has occurred in the drive unit, it maintains external communication to output drive fault information.

[0086] Specifically, when the motor drive control circuit is working normally, the power supply unit provides the control power supply to the control unit, enabling the control unit to be powered on and output a control signal to the drive unit. At the same time, the power supply unit provides the drive power supply to the drive unit, enabling the drive unit to be powered on and control the switching tubes in the inverter circuit to turn on or off according to the control signal input by the control unit, so that the inverter circuit provides a working power supply for loads such as motors.

[0087] During this process, when a short - circuit fault occurs in the drive unit, such as a short - circuit at the input end of the drive unit, control the drive power supply to stop supplying power to the drive unit to protect the drive unit, thereby realizing the protection of the entire circuit. At the same time, make the power supply unit continue to supply the control power supply to the control unit, enabling the control unit to continue to work and maintain the communication connection with the outside, so as to output the drive fault information of the motor drive circuit to the outside, facilitating the outside to timely understand the fault state of the motor drive circuit, etc., which is beneficial to the overall control of the product to which it is applied.

[0088] In the above - mentioned embodiment, by controlling the drive power supply to stop supplying power to the drive unit when a short - circuit fault occurs in the drive unit to protect the drive unit, and at the same time enabling the power supply unit to maintain supplying the control power supply to the control unit, so that the control unit can also maintain external communication and output fault information when a short - circuit fault occurs in the drive unit, effectively solving the problem in the related technology that when a short - circuit fault occurs in the drive circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in a timely manner, providing favorable conditions for the overall control of the product where it is located.

[0089] According to an embodiment of the present invention, the motor drive control circuit includes a first regulated power supply connected between the drive power supply and the drive unit. When a short-circuit fault occurs in the drive unit, the first regulated power supply stops supplying power to the drive unit and outputs a drive short-circuit fault signal to the control unit.

[0090] Specifically, when the motor drive control circuit is operating normally, the power supply unit supplies drive power to the drive unit through the first regulated power supply and supplies control power to the control unit at the same time, so that the control unit controls the drive unit to operate to drive the switching tubes in the inverter circuit to conduct or disconnect, thereby supplying working power to loads such as motors. During this process, when a short-circuit fault occurs in the drive unit, that is, when a short circuit occurs at the input end of the drive unit, the first regulated power supply will enter the short-circuit protection state. At this time, the first regulated power supply pulls down the voltage at its output end to protect the drive unit; at the same time, the voltage at the input end of the first regulated power supply remains unchanged, ensuring that the power supply unit does not enter the short-circuit protection state, that is, remains in the normal operating state, so as to ensure that the power supply unit can continue to supply control power to the control unit, enabling the control unit to operate normally and maintain communication connection with the outside; at the same time, the first regulated power supply also sends a drive short-circuit fault signal to the control unit through the communication line between it and the control unit. Since the control unit can operate normally, it can receive this drive short-circuit fault signal and transmit it to the outside, so that the outside can timely learn about the fault state of the motor drive control circuit.

[0091] Further, according to an embodiment of the present invention, when the control unit receives the drive short-circuit fault signal, it also controls the first regulated power supply to stop working.

[0092] Specifically, when the control unit receives the drive short-circuit fault signal input by the first regulated power supply, the control unit can actively control the first regulated power supply to stop working through the enable signal line between it and the first regulated power supply, so as to avoid the problem that the first regulated power supply is in the short-circuit protection state for a long time, resulting in excessive power consumption and temperature rise.

[0093] In the above embodiment, through the regulated power supply, it is possible to achieve short-circuit protection for the drive unit when a short-circuit fault occurs in the drive unit, while ensuring that the power supply unit does not enter the short-circuit protection state, maintaining the power supply to the control unit to ensure communication between the control unit and the outside, and transmitting the internal circuit fault information to the outside; at the same time, by the control unit actively controlling the regulated power supply to stop working, the problem that the regulated power supply is in the short-circuit protection state for a long time, resulting in excessive power consumption and temperature rise, is avoided.

[0094] According to another embodiment of the present invention, the motor drive control circuit includes a second regulated power supply connected between the drive power supply and the drive unit. When a short-circuit fault occurs in the drive unit, the second regulated power supply stops supplying power to the drive unit, detects the output voltage of the second regulated power supply, and provides the output voltage to the control unit, so that the control unit determines that a short-circuit fault has occurred in the drive unit based on the output voltage and outputs a drive short-circuit fault signal through external communication.

[0095] Specifically, when the motor drive control circuit is operating normally, the power supply unit supplies the drive power to the drive unit through the second regulated power supply and supplies the control power to the control unit at the same time, so that the control unit drives the switch tubes in the inverter circuit to conduct or disconnect by controlling the drive unit, and then supplies the working power to loads such as the motor. During this process, when a short-circuit fault occurs in the drive unit, that is, when a short circuit occurs at the input end of the drive unit, the second regulated power supply will enter the short-circuit protection state. At this time, the second regulated power supply pulls down the voltage at its own output end to protect the drive unit; at the same time, the voltage at the input end of the second regulated power supply remains unchanged, ensuring that the power supply unit does not enter the short-circuit protection state, that is, remains in the normal working state, so as to ensure that the power supply unit can continue to supply the control power to the control unit, enabling the control unit to work normally and maintain the communication connection with the outside. When the control unit is working normally, the control unit also detects the voltage at the output end of the second regulated power supply and determines whether a short-circuit fault has occurred in the drive unit based on this voltage, such as whether the voltage is less than a certain value. When it is determined that a short-circuit fault has occurred, a drive short-circuit fault signal is sent to the outside through the communication connection with the outside, so that the outside can timely learn about the fault state of the motor drive control circuit.

[0096] Further, according to an embodiment of the present invention, when the control unit determines that a short-circuit fault has occurred in the drive unit, it also controls the second regulated power supply to stop working.

[0097] Specifically, when the control unit determines that a short-circuit fault has occurred in the drive unit based on the detected voltage, it can also actively control the second regulated power supply to stop working through the enable signal line between the control unit and the second regulated power supply, so as to avoid the problem that the second regulated power supply is in the short-circuit protection state for a long time, resulting in too high power consumption and temperature rise.

[0098] In the above embodiments, through the regulated power supply, when a short-circuit fault occurs in the drive unit, the drive unit can be short-circuit protected, and at the same time, it is ensured that the power supply unit does not enter the short-circuit protection state, and the power supply to the control unit is maintained to ensure that the control unit communicates with the outside; at the same time, when the control unit identifies a short-circuit fault based on the sampling value of the voltage sampling module, it communicates with the outside to transmit the internal fault information of the circuit to the outside, and can also actively control the regulated power supply to stop working, avoiding the problem that the regulated power supply is in the short-circuit protection state for a long time, resulting in too high power consumption and temperature rise.

[0099] According to another embodiment of the present invention, the motor drive control circuit includes a controllable switch connected between a drive power supply and a drive unit. When a short-circuit fault occurs in the drive unit, the power supply unit stops providing the drive power supply and the control power supply, the control unit is powered down, the controllable switch is turned off. After the power supply unit resumes providing the drive power supply and the control power supply, the control unit is powered on and controls the controllable switch to close. Due to the short-circuit fault occurring in the drive unit, the power supply unit stops providing the drive power supply and the control power supply again, the control unit is powered down, and the controllable switch is turned off. This process repeats until the control unit determines that the drive unit has a short-circuit fault based on the number of power-on times and controls the controllable switch to remain off, and outputs a drive short-circuit fault signal through external communication.

[0100] Specifically, when the motor drive control circuit is operating normally, the power supply unit provides a control power supply to the control unit. The control unit operates and controls the controllable switch to be in a closed state. The power supply unit provides a drive power supply to the drive unit through the controllable switch. At this time, the control unit controls the drive unit to operate to drive the switching tubes in the inverter circuit to conduct or turn off, thereby providing a working power supply to loads such as motors.

[0101] During this process, when a short-circuit fault occurs in the drive unit, that is, when a short circuit occurs at the input end of the drive unit, the power supply unit enters a short-circuit protection state to pull down the drive power supply to protect the drive unit. At the same time, the control power supply is synchronously pulled down, the control unit is powered down, and the control unit cannot continue to output a control signal to the controllable switch to control it to be in a closed state, resulting in the controllable switch being turned off. After the controllable switch is turned off, since the power supply unit and the drive unit are in a disconnected state, the power supply unit will exit the short-circuit protection state and enter the normal operating state, and provide the drive power supply to the drive unit again and provide the control power supply to the control unit again. The control unit is powered on and controls the controllable switch to close again, and records the number of power-on times. After the controllable switch is closed again, since the drive unit is still in a short-circuit state, the power supply unit will enter the short-circuit protection state again and stop providing the drive power supply to the drive unit and providing the control power supply to the control unit. The control unit is powered down again, and the controllable switch is turned off again. This process repeats until the recorded number of power-on times reaches a preset number (such as 3 times, etc.), determining that the drive unit has a short-circuit fault. At this time, the control unit controls the controllable switch to always be in an off state. Since the controllable switch is always in an off state, the power supply unit will continuously be in the normal operating state and continuously provide the control power supply to the control unit, enabling the control unit to be in the normal operating state. At this time, the control unit can send a drive short-circuit fault signal to the outside through its communication connection with the outside, so that the outside can timely learn about the internal fault situation of the circuit.

[0102] In the above embodiments, short-circuit protection of the drive unit can be achieved through a controllable switch. At the same time, based on the short-circuit protection characteristics of the power supply unit, by controlling the on / off of the controllable switch, detection of short-circuit faults can be realized. And when the detection result is a short-circuit fault, by controlling the controllable switch to remain in the off state, the control unit can be in a normal working state, so that the control unit can send a drive short-circuit fault signal to the outside.

[0103] It should be noted that for the details not disclosed in the drive short-circuit protection method, reference can be made to the details disclosed in the aforementioned motor drive control circuit, and specific details will not be elaborated here.

[0104] According to the drive short-circuit protection method of the motor drive control circuit according to an embodiment of the present invention, when a short-circuit fault occurs in the drive unit, the drive power supply is controlled to stop supplying power to the drive unit to protect the drive unit. At the same time, the power supply unit is maintained to supply control power to the control unit, so that the control unit can also maintain external communication and output drive fault information when a short-circuit fault occurs in the drive unit, effectively solving the problem in the related art that when a short-circuit fault occurs in the drive circuit, the microcontroller cannot maintain external communication, and thus the outside cannot obtain relevant information in a timely manner.

[0105] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0106] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0107] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0108] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A motor drive control circuit, characterized in that, It includes a power supply unit, a driving unit, a control unit and a driving fault protection unit. The power supply unit is used to provide driving power and control power to the driving unit and the control unit respectively. The control unit is used to output a control signal to the driving unit according to the control power. The driving unit is used to drive the switching tubes in the inverter circuit to turn on or off according to the driving power when receiving the control signal. The driving fault protection unit is used to control the power supply unit to stop supplying power to the driving unit when a short-circuit fault occurs in the driving unit, so that the power supply unit maintains supplying the control power to the control unit, and the control unit keeps external communication when determining that a short-circuit fault occurs in the driving unit to output driving fault information; The driving fault protection unit includes: A first voltage stabilizer. The first voltage stabilizer is connected between the driving power and the driving unit. The first voltage stabilizer is used to stop supplying power to the driving unit when a short-circuit fault occurs in the driving unit and output a driving short-circuit fault signal to the control unit; When a short-circuit fault occurs in the driving unit, the first voltage stabilizer enters the short-circuit protection state. The first voltage stabilizer pulls down the voltage at its output terminal to protect the driving unit; at the same time, the voltage at the input terminal of the first voltage stabilizer remains unchanged, ensuring that the power supply unit provides control power to the control unit, enabling the control unit to work normally and maintain communication connection with the outside; Or, the driving fault protection unit includes: A second voltage stabilizer. The second voltage stabilizer is connected between the driving power and the driving unit. The second voltage stabilizer is used to stop supplying power to the driving unit when a short-circuit fault occurs in the driving unit; A voltage detection module, which is used to detect the output voltage of the second voltage stabilizer and provide the output voltage to the control unit, so that the control unit determines that a short-circuit fault occurs in the driving unit according to the output voltage and outputs the driving short-circuit fault signal through external communication; When a short-circuit fault occurs in the driving unit, the second voltage stabilizer enters the short-circuit protection state. The second voltage stabilizer pulls down the voltage at its output terminal to protect the driving unit; at the same time, the voltage at the input terminal of the second voltage stabilizer remains unchanged, ensuring that the power supply unit provides control power to the control unit, enabling the control unit to work normally and maintain communication connection with the outside.

2. The motor drive control circuit according to claim 1, characterized in that, The control unit is further used to control the first voltage stabilizer to stop working when receiving the driving short-circuit fault signal.

3. The motor drive control circuit according to claim 1, wherein, The control unit is further used to control the second voltage stabilizer to stop working when determining that a short-circuit fault occurs in the driving unit.

4. A motor controller, characterized in that, It includes: An inverter circuit; The motor drive control circuit according to any one of claims 1-3. The motor drive control circuit is used to drive the switching tubes in the inverter circuit to conduct or turn off, and keep external communication through the control unit to output driving fault information when a short-circuit fault occurs in the driving unit.

5. A compressor, characterized in that, It includes: A motor; The motor controller according to claim 4, wherein the motor controller is used to drive the motor to operate.

6. A vehicle, characterized in that, It includes a compressor according to claim 5.

7. A driving short - circuit protection method for a motor - driven control circuit, characterized in that, The motor drive control circuit includes a power supply unit, a drive unit, and a control unit. The power supply unit is used to provide a drive power supply and a control power supply to the drive unit and the control unit respectively. The control unit is used to output a control signal to the drive unit according to the control power supply. The drive unit is used to drive the switching tubes in the inverter circuit to turn on or off according to the drive power supply when receiving the control signal. The method includes: When a short-circuit fault occurs in the drive unit, controlling the drive power supply to stop supplying power to the drive unit, so that the power supply unit maintains supplying the control power supply to the control unit; When the control unit determines that a short-circuit fault occurs in the drive unit, it maintains external communication to output drive fault information; The motor drive control circuit includes a first voltage stabilizer connected between the drive power supply and the drive unit, wherein, When a short-circuit fault occurs in the drive unit, the first voltage stabilizer stops supplying power to the drive unit and outputs a drive short-circuit fault signal to the control unit; When a short-circuit fault occurs in the drive unit, the first voltage stabilizer enters a short-circuit protection state. The first voltage stabilizer pulls down the voltage at its output terminal to protect the drive unit; at the same time, the voltage at the input terminal of the first voltage stabilizer remains unchanged, ensuring that the power supply unit provides the control power supply to the control unit, enabling the control unit to work normally and maintain communication connection with the outside; Alternatively, the motor drive control circuit includes a second voltage stabilizer connected between the drive power supply and the drive unit, wherein, When a short-circuit fault occurs in the drive unit, the second voltage stabilizer stops supplying power to the drive unit, detects the output voltage of the second voltage stabilizer, and provides the output voltage to the control unit, so that the control unit determines that a short-circuit fault occurs in the drive unit and outputs the drive short-circuit fault signal through external communication according to the output voltage; When a short-circuit fault occurs in the drive unit, the second voltage stabilizer enters a short-circuit protection state. The second voltage stabilizer pulls down the voltage at its output terminal to protect the drive unit; at the same time, the voltage at the input terminal of the second voltage stabilizer remains unchanged, ensuring that the power supply unit provides the control power supply to the control unit, enabling the control unit to work normally and maintain communication connection with the outside.

8. The method according to claim 7, wherein When the control unit receives the drive short-circuit fault signal, it also controls the first voltage stabilizer to stop working.

9. The method according to claim 7, wherein When the control unit determines that a short-circuit fault occurs in the drive unit, it also controls the second voltage stabilizer to stop working.

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