基于电压矢量注入法的PMSM无传感器控制

Sensorless control of PMSM based on voltage vector pulse method

针对贴面式永磁同步电机的无传感器控制在低速和静止时一直存在着转子位置难以检测和估算的问题,提出了一种新的无传感器控制策略,即根据定子铁芯的非线性磁化特性,采用电压矢量注入法(Voltage Vector Pulse Method),在电机开始运行时,由闭环自适应磁通观测器估算转子位置、速度,实现转子初始位置检测。最终,通过Matlab仿真和实验,验证了该方法的有效性。

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.