A DSP-CONTROLLED HIGH ACCURACY SPEED MEASUREMENT TECHNIQUES FOR MOTION CONTROL IN PMSM DRIVERS

摘要

Inmotion control drives, speed measurement with high accuracy is an importantissue and has great influence on the motor performance. In this paper, speedmeasurement techniques'?affects for motion control?in permanentmagnet synchronous machine (PMSM)?with low resolution incremental encoderare discussed. Conventional speed measurement techniques such as?measuringfrequency method (M-method,?measuring period?method(T-method)?and?measuring both frequency and period?method (M/T-method)?areintroduced.?The simulation results are obtained in MATLAB/Simulink and theexperimental results are presented based on TMS320x28xxx.?Simulation andexperimental comparative analysis of the various methods results show thatM-method is suitable for high speed measurement, T-method is suitable for lowspeed measurement and M/T method is not related with speed and it works in bothlow speed and high speed. So the M/T method is better than the M-method andT-method and the speed measurement error is less than other methods with a highprecision in a wide speed range.