AC commutatorless and brushless motor

例句：

1. 1. The newAC commutatorless and brushlessmotor is more efficient than the old one.
   这款新型的无换向器和无刷电机比旧款更高效。
2. 2. Thedesign of this motor is innovative, withno commutator or brushes towear out.
   这款电机的设计非常创新，没有换向器或刷子会磨损。
3. 3.The new motor has a longer lifespanand requires less maintenance.
   这款电机的使用寿命更长，维护需求也更少。