Motor shutdown control loop and method

The invention discloses a motor shutdown control loop and method, and belongs to the field of motor safety protection control. The motor shutdown control loop comprises a power supply, a time delay relay, a first switch, a relay and a control device; the control device is provided with a first input end, a second input end and an output end; the output end is connected with the motor, and the control device is used for controlling the motor to stop when the power source connected with the first input end is disconnected, and controlling the high-voltage power supply of the motor to be disconnected when the power source connected with the second input end is disconnected. Through series connection of the time-delay relay and the relay coil, when an operator turns off the first switch, the control device firstly sends a shutdown instruction to the motor, and after the motor is turned off and the time-delay relay is turned off, the control device cuts off high-voltage power supply of the motor. According to the