内插式永磁同步电机无速度传感器控制

为实现内插式永磁同步电机包含零速在内的全速度范围内无转子位置/速度准确检测,提出了一种无传感器复合方法。在高速范围,通过对扩展反电势的估算以得到转子位置和速度,低速时采用高频信号注入法进行转子位置检测。仿真研究结果表明,两种方法的结合既能在低速时准确地观测出转子的空间位置和速度,也能保证高速运行时较快的动态响应,适合于全速范围内电机的无传感器运行。

Speed sensorless control of interior permanent magnet synchronous motors

Aiming at realizing the position and speed sensorless control of interior permanent magnet synchronous motor（IPMSM） during the full speed range including zero speed,a hybrid rotor position self-sensing approach was investigated.In the high speed range the method of extended-EMF estimation was used,in the low and zero speed ranges the high frequency signal injection method was used to get the position of the rotor.Experimental results show that the hybrid rotor position self-sensing approach can precisely estimate the rotor position and speed at the low speed range,and fast dynamic response at the high speed can be achieved.Therefore the proposed scheme is suitable for the sensorless vector control of an IPMSM in a wide speed range,including zero-speed.