永磁无刷伺服电机的换相和控制都需要准确的转子位置信息，然而位置传感器有其难以克服的缺点。
The exact rotor position is required while a permanent magnet brushless servo motor (PMBSM) is under commutation and control. Howere, position sensors have some fatal defects.
永磁无刷伺服电机的换相和控制都需要准确的转子位置信息，然而位置传感器有其难以克服的缺点。
The exact rotor position is required while a permanent magnet brushless servo motor (PMBSM) is under commutation and control. Howere, position sensors have some fatal defects.
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