Permanent magnet synchronous motor position sensorless control method

The invention relates to a motor control method, particularly a permanent magnet synchronous motor position sensorless control method, and belongs to the field of motor control. A phase-locked loop technology is introduced into position sensorless counter electromotive force estimation, and the counter electromotive force is subjected to phase locking, so that CPU calculated amount is reduced, andestimation precision and anti-interference performance are improved; and meanwhile, an encoder used in vector control can be omitted, so that control system cost is lowered, reliability is improved,and stable, reliable and efficient operation of the permanent magnet synchronous motor driving system can be realized. 本发明涉及种电机控制方法，尤其涉及种永磁同步电机无位置传感器控制方法，属于电机控制领域。本发明将锁相环技术引入无位置传感器反电势估算中，通过对反电势进行锁相，减少了CPU计算量，提高了估算精度和抗干扰性；能够省掉矢量控制中用到的编码器，降低了控制系统的成本，提供了可靠性，可实现永磁同步电机驱动系统稳定、可靠、高效运行。