介绍了无刷直流电动机的控制原理，给出了系统设计的整体方案，并详述了硬件电路和软件程序设计。

In this paper, we introduced the control theory of brushless DC motor, and proposed the design scheme, software method and hardware electric circuit for whole system.

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还介绍了这种直流电动机的设计原理。

Design principles for the d. C. motor are also introduced.

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本文是基于双闭环直流驱动原理及双闭环直流驱动系统工程设计方法，设计出应用于直流电动机的双闭环直流驱动系统。

We have designed the DC drive system of double closed loops according to the methods of the project design, which based on the DC drive regulation principle.

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