稀土水磁无刷直流方波电机是一种新型电动机，其性能优越，发展前景广阔。本文介绍了无刷直流方波电机的工作原理和其PWM控制器的设计。

The rare earth permanent magnet brushless DC square wave motor is a new type of motor. With its high performance,the motor shows a broad prospect for further advances. The operation principle and designing method of PWM controller of brushless DC square wave motor is introduced.

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