Sensorless control of PMSM based on voltage vector pulse method

SONG Zhengqiang1, JIANG Fan2
(1.Department of Automobile and Electricity Engineers, Yangzhou Polytechnic College, Yangzhou 225011, China;
2.Road Engineering Management Department Binzhou, Binzhou 256600, China）

Abstract: A new approach to sensorless speed control and initial rotor position estimation for a surface permanent magnet synchronous motor(SPMSM) drive was presented. At a rotating condition, speed and rotor position estimation of SPMSM drive was obtained through a selfadaptive flux observer(SAO) by only measuring phase voltages and currents. The initial rotor position was performed by using the nonlinear magnetization characteristics of the stator core caused by the rotor magnets. Experimental results show that in both steady and transient state, the system can achieve expected performances.
Key words: permanent magnet synchronous motor(PMSM); sensorless control; system simulation; selfadaptive observer