Design of motor speed control system on AMT test-bench

Aiming at solving problems like high cost,complex installation and unstable running because of loads restriction in the engine in used automatic mechanical transmission(AMT) test-bench,a motor speed control system based on frequency converter is designed to replace engine as the power source of AMT test-bench.The principles of the AMT test-bench and the speed regulation of motor are introduced,and the design scheme for the motor speed control system is elaborated.The system uses virtual accelerator to simulate the accelerator pedal as the input of the driver's intent to control the motor,and functions such as the CAN-BUS communication between the speed control system and AMT control unit and the real-time motor speed control are achieved.And a self-adaptive PID controller is established,thus accomplishing the precise control of the motor speed.The experiments are done to verify the system,and the results show that the motor speed control system meets the requirements of the AMT test-bench.