... 换相器，移相装置 phase changer 无换相器，无整流子 absence of commutator 多相并励换相器电动机 polyphase shunt commutator motor ...
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无刷直流(BLDC)伺服控制，可选的3相换轨取代传统的霍尔效应传感器。
For Brushless DC (BLDC) servo control, optional 3 phase commutation tracks replace the traditional Hall Effect sensors.
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.
论文针对无刷直流电动机无传感器控制中存在的问题，分别从电机的换相、闭环控制和抗干扰等方面来探讨永磁无刷直流电动机的无传感器控制。
In allusion to the key problem on the control of BLDCM, the thesis discuss some methods about control of it in aspects of commutation of motor, closed-loop control and the disturbance restraint.
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