analogue commutator

例句：

1. 1. The analog commutator is used to control the speed of a motor.
   模拟换向器用于控制电机的速度。
2. 2. In the analog commutator, the current flows through two coils in opposite directions.
   在模拟换向器中，电流通过两个线圈以相反方向流动。
3. 3. Analog commutators are commonly found in electric motors and generators.
   模拟换向器常用于电动机和发电机中。