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Modern motors use electronic control systems rather than a commutator , but the principle is the same .

现代电动机使用电子控制系统替代整流器，但是原理一致。

Furiously he tested the spark-plugs , stared at the commutator .

他气呼呼地测试着火花塞，眼睛盯着转换器。

Commutator and brushes shall be free of grease , or other contaminants .

换向器和炭刷应无脂或其他污物。

And we also concern the bound of the norm of the commutator .

并且我们也可以去找到这类交换子的范数。

Traditionally , this current reversal was achieved with a rotary switch known as a commutator , which transmitted electricity to the windings through brushes that made contact with conductive strips which passed under them as the rotor turned .

传统意义上，电流换向是通过一个叫做整流器的旋转开关来完成的，整流器通过与导电片接触的电刷将电流导入铜线圈，导电片在转子转动时会在电刷的下方通过。