High accuracy speed measurement for rotary motor based on DSP

Dou Manli*, Wu Gang, Shi Chun

Abstract

Measurement of the motor speed has great influence on the control effect of effectiveness and precision of motor control. Conventional methods such as M method, T method, M/T method cannot satisfy the demand of the velocity measurement error in the operating range of the motor. A new method for speed measurement based on Digital signal processor TMS320x28xxx is presented; the experiments show that the new method can meet the accuracy requirements in the operating range of the motor.