technology in the application of PMSM

 

 

XIE Jia peng

 

(715th Research Institute of China Shipbuilding Industry Corpordtion Hangzhou 310010, China)

 

 

Abstract: Aiming at the problems of the traditional speed sensing technology in engineering applications such as the installation precision, the application environment, the cost and so on, a sliding mode observer for the speed sensorless technology was presented. Based on the model of the motor, the sliding mode observer used for motor rotor position and speed estimation was designed, in view of the traditional sliding mode variable structure by introducing switching the chattering problem, using saturation function weaken the chattering. Moleling the SMO in Simulink, the proposed method was demonstrated on the basis of TMS320F2812. The results indicate that sensorless technique based on sliding mode observer can estimate the speed of the motor, and can replace the traditional sensor in the FOC control systerm,and improve the reliability of the system.

 

Key words: PMSM; sliding model obsvers(SMO); speed sensorless; DSP