开关磁阻电机（SRM）在实际运行时由于负载增加导致电流增大,会使SRM进入磁饱和工作状态。传统的无位置传感器控制方法解决磁饱和问题需要进行大量离线测量。因此，提出一种基于特殊位置判断的SRM无位置传感器控制策略。该方法通过向非导通相注入高频脉冲电压以得到全周期电感，通过电感曲线非饱和段的线性变化关系在线得出15°、30°、45°、60° 4个特殊位置对应的非饱和相电感值，根据电感与角度对应关系，在一个周期内得到4个特殊位置，通过相邻2次位置估算电机转速与全周期转子位置。在此基础上，搭建了基于Simulink的仿真模型和基于DSP的试验平台，通过仿真与试验验证了该方法的正确性。

When the switched reluctance motor (SRM) is running, the increased current caused by the increased load will lead the SRM to the magnetic saturation status. The traditional sensorless control method to solve the problem of magnetic saturation for SRM requires a lot of off-line measurements. So, a sensorless control strategy of SRM based on special position judgment is proposed, which obtains the full cycle inductance by injecting high frequency pulse voltage into the non-conducting phase. The unsaturated phase inductance values corresponding to four special positions at 15°, 30°, 45° and 60° are obtained on-line through the linear variation relationship of the unsaturated section of the inductance curve. According to the inductance-angle function, four special positions are obtained in one cycle. The motor speed and the full cycle rotor position are estimated by two adjacent positions. On this basis, a simulation model based on Simulink and an experimental platform with DSP are built, with which the correctness of the proposed method is verified.

国家自然科学基金项目（51607091）