This passage puts forward an indirect speed test method of the separately excited motor,which can calculate the motor speed quickly by controlling the parameters of main current,armature current and exciting current of the motor.So it can solve the speed test question of the separately excited motor,when the motor has no speed sensor.This method is not only simple,but also easy to achieve.And the experimental data and results are presented.

This paper describes the application of the XC164CM in the asynchronous motor slip control system.The advantage of the powerfully computational capability and the CAPCOM6 unit which adapts to the motor control of the XC164CM are taken.This system,which adopts two closed loop control algorithm,achieves a faster and timely performance for the slip frequency control system.