Commutation of the motor is achieved by use of a single Hall element sensor to detect the rotational position of an alternating-pole ring magnet.是什么意思_Commutation of the motor is achieved by use of a single Hall element sensor to detect the rotational position of an alternating-pole ring magnet.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句