关键词: 永磁同步电机, 高频方波注入, 无位置传感器控制, 高通滤波器, 低通滤波器, 静止坐标系

Abstract: A new sensorless control scheme of interior permanent magnet synchronous motor using high frequency quadrature square wave voltage injected into stationary coordinate system were presented. The method was an improvement over the traditional high frequency rotary sinusoidal voltage injection method. The entire signal process was established by discrete high frequency currents. A position estimation method without low-pass filter was proposed, and the phase shift caused by high-pass filter was reduced. The sensorless control method will be less affected by digital filters, and can solve the common shortcomings of current injection methods based on static coordinate system.

Key words: permanent magnet synchronous motor( PMSM), high frequency square wave injection, sensorless control, high pass filter( HPF), low pass filter( LPF), static coordinate system