永磁同步电动机无传感器控制综述

Permanent magnet synchronous motors (PMSM) have been used more and more widely for drive applications because of their inherent merit. Also, due to the inherent bug of mechanical sensors, a significant attention has been paid to sensorless strategies. This paper first introduces the principle of vector control of PMSM. Several estimation strategies for rotor position angle and rotor velocity are analyzed then in detail with their advantages and disadvantages discussed respectively. Finally problems of the existing sensorless strategies are pointed out.