The method follows the relationship between the inductance of a non-excitation winding and the rotor position of SRM, and a resonant circuit is used to read out the inductance information.

• 根据开关磁阻电机的作励磁相绕组电感的参数随电机转子位置变化的规律，利用谐振电路将电感参数转换成含有电感信息的频率信号，经数字处理器计算得出实时的转子位置信号。