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CN-116885975-B - Motor shutdown control loop and method

CN116885975BCN 116885975 BCN116885975 BCN 116885975BCN-116885975-B

Abstract

The application discloses a motor shutdown control loop and a motor shutdown control method, which belong to the field of motor safety protection control and comprise a power supply, a time delay relay, a first switch, a relay and a control device, wherein the control device is provided with a first input end, a second input end and an output end, the output end is connected with a motor, the control device is used for controlling the motor to stop when the power supply connected with the first input end is disconnected, and controlling to cut off high-voltage power supply of the motor when the power supply connected with the second input end is disconnected. The application realizes the closing of the motor before the high voltage is applied, and avoids the motor damage caused by the sudden breaking of the high voltage of the motor.

Inventors

  • WANG FALU
  • XU TAO
  • XUE ZHENJIAN
  • SONG QIANG
  • KONG DEBING

Assignees

  • 安徽合力股份有限公司

Dates

Publication Date
20260512
Application Date
20230609

Claims (8)

  1. 1. The motor shutdown control loop is characterized by comprising a power supply, a time delay relay, a first switch, a relay and a control device; The control device is used for controlling the motor to stop when the power supply connected with the first input end is disconnected, controlling the motor to cut off high-voltage power supply when the power supply connected with the second input end is disconnected, wherein the positive electrode of the power supply is connected with one end of the first switch, and the other end of the first switch is connected with the first input end; The positive electrode of the power supply is connected with the first end of the normally open contact of the delay relay, the second end of the normally open contact of the delay relay is connected with one end of the coil of the relay, and the other end of the coil of the relay is connected with the negative electrode of the power supply; the positive electrode of the power supply is connected with the first end of the normally open contact of the relay, and the second end of the normally open contact of the relay is connected with the second input end of the control device; the other end of the first switch is also connected with one end of a coil of the delay relay, and the other end of the coil of the delay relay is connected with the negative electrode of the power supply; The control device comprises a high-voltage battery system, a vehicle controller and a motor controller; the first input end is the input end of the vehicle controller, the second input end is the input end of the high-voltage battery system, the output end is the output end of the motor controller, and the vehicle controller is respectively connected with the motor controller and the high-voltage battery system through communication lines, and the output end of the motor controller is connected with a motor; The high-voltage power supply system is used for switching off high-voltage power supply to the motor when the power supply connected with the second input end is disconnected; The vehicle controller is provided with a sixth input end, the other end of the first switch is connected with the sixth input end, and the vehicle controller is used for sending an instruction for disconnecting high-voltage power supply to the motor to the high-voltage battery system when the sixth input end is at a low level.
  2. 2. The motor shutdown control circuit of claim 1, further comprising a second switch disposed between the other end of the first switch and the first input in series with the first switch and the first input.
  3. 3. The motor shutdown control circuit of claim 1, further comprising a third switch, wherein the control device is provided with a third input end, and wherein the control device realizes motor scram control through a power on-off state of the third input end; one end of the third switch is connected with the positive electrode of the power supply, and the other end of the third switch is connected with the third input end.
  4. 4. The motor shutdown control circuit of claim 1, further comprising a second switch, a third switch, the control device providing a third input; The second switch is arranged between the other end of the first switch and the first input end, and is connected with the first switch and the first input end in series; one end of the third switch is connected with the positive electrode of the power supply, and the other end of the third switch is connected with the third input end.
  5. 5. The motor shutdown control circuit of claim 1, wherein the vehicle controller is further provided with a fourth input terminal, wherein the motor controller is provided with a fifth input terminal, wherein the fourth input terminal and the fifth input terminal are respectively connected with the second terminal of the normally open contact of the relay; The second input end, the fourth input end and the fifth input end are used for self-checking of the control device when the power supply is connected.
  6. 6. A motor shutdown control method, characterized in that the motor shutdown control circuit according to any one of claims 1 to 5 is adopted, comprising: when the voltage of the first input end of the control device is 0, the control device sends a shutdown instruction to shutdown the motor; when the voltage of the second input end of the control device is 0, the control device sends a command for disconnecting the high-voltage power supply to disconnect the high-voltage power supply of the motor.
  7. 7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the content of the method of controlling the shutdown of a motor as in claim 6 when executing the program.
  8. 8. A computer readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the contents of the method of controlling the shutdown of a motor in claim 6.

Description

Motor shutdown control loop and method Technical Field The application relates to the field of motor safety protection control, in particular to a motor shutdown control loop and a motor shutdown control method. Background With the increasingly strict requirements of energy conservation and emission reduction, the transportation machinery such as an electric forklift, an electric stacker and the like gradually enter the market. There is a certain difference in electric vehicle operation from internal combustion vehicles. The internal combustion engine type can directly turn off the key switch to stop the engine. However, the electric vehicle needs to shut down the motor and then pull down the high voltage power. If the motor suddenly breaks the high voltage electricity, the motor is damaged, and the control loop is designed in order to reduce the influence of the difference in operation on operators. Disclosure of Invention In order to solve the defects in the prior art, the application provides a motor shutdown control loop and a motor shutdown control method. In a first aspect, the application provides a motor shutdown control loop, which comprises a power supply, a time delay relay, a first switch, a relay and a control device; The control device comprises a first input end, a second input end and an output end, wherein the output end is connected with the motor, the control device is used for controlling the motor to stop when a power supply connected with the first input end is disconnected, controlling the motor to cut off high-voltage power supply when the power supply connected with the second input end is disconnected, the positive electrode of the power supply is connected with one end of the first switch, and the other end of the first switch is connected with the first input end; The positive electrode of the power supply is connected with the first end of the normally open contact of the delay relay, the second end of the normally open contact of the delay relay is connected with one end of the coil of the relay, and the other end of the coil of the relay is connected with the negative electrode of the power supply; the positive electrode of the power supply is connected with the first end of the normally open contact of the relay, and the second end of the normally open contact of the relay is connected with the second input end of the control device; the other end of the first switch is also connected with one end of a coil of the delay relay, and the other end of the coil of the delay relay is connected with the negative electrode of the power supply. In a preferred embodiment of the application, the motor shutdown control loop further comprises a second switch, wherein the second switch is arranged between the other end of the first switch and the first input end and is connected with the first switch and the first input end in series. In the preferred embodiment of the application, the motor stop control loop further comprises a third switch, wherein the control device comprises a third input end, and the control device realizes motor scram control through the power on-off state of the third input end; one end of the third switch is connected with the positive electrode of the power supply, and the other end of the third switch is connected with the third input end. In a preferred embodiment of the application, the motor shutdown control loop further comprises a second switch and a third switch, wherein the control device comprises a third input end; the second switch is arranged between the other end of the first switch and the first input end, and is connected with the first switch and the first input end in series; one end of the third switch is connected with the positive electrode of the power supply, and the other end of the third switch is connected with the third input end. Based on any of the above embodiments, there is also a preferred embodiment, the control device comprising a high voltage battery system, a vehicle controller, and a motor controller; The first input end is the input end of the vehicle controller, the second input end is the input end of the high-voltage battery system, the output end is the output end of the motor controller, and the vehicle controller is respectively connected with the motor controller and the battery high-voltage system through communication lines, and the output end of the motor controller is connected with a motor. In a preferred embodiment of the application, the vehicle controller is provided with a sixth input end, the other end of the first switch is connected with the sixth input end, and the vehicle controller is used for sending an instruction for disconnecting high-voltage power supply to the motor to the high-voltage battery system when the sixth input end is at a low level. In a preferred embodiment of the application, the vehicle controller further comprises a fourth input end, the motor controller comprises a fifth input end, an