By high frequency injection method and a kind of magnetic anisotropy of PMSM, the rotor saliency position can be calculated in the PMSM sensorless vector control system. 摘要通过注入特定的高频电压信号，利用电机的各向异性以确定转子的凸极位置，在同步电机无传感器矢量控制中，对包括零速度在内的所有速度下都能获得精确的转子位置信息。
On account of the imprecision of the mechanical position sensor and the phase-shift problem of an existing sensorless method, a novel sensorless strategy is proposed. 鉴于位置传感器的不精确和一种现存的无位置传感器方案的移相困难，提出了一种新的无位置传感器方案。
