名词
中文翻译：电动机的换向器
同义词：
['rotor', 'armature例句：1. The commutator is the part of the motor that moves when it turns.（换向器是电机转动时移动的部分。）']
例句：
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1. The commutator is the part of the motor that moves when it turns.
换向器是电机转动时移动的部分。
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2. The commutator is responsible for transferring electrical current between the stator and rotor.
换向器负责在定子和转子之间传递电流。
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3. The commutator wears out quickly due to friction with the rotor.
由于与转子的摩擦，换向器很快磨损。