Based on the introduction of components and principle of work of frequency modulation system of constant frequency AC power supply, math model of frequency modulation system is established.

在介绍某型恒频交流电源频率调节系统的组成和工作原理的基础上，建立频率调节系统的数学模型。

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Based on the work principle of AC motor, the article analyzes the cause and phenomenon of alternating-current motor and puts forward the method of removing shaft current.

根据交流电动机的工作原理，分析讨论其轴电流产生的原因和表象，提出了防止轴电流产生的方法。

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Grounded on the work above, a high performance full digital PM AC servo system based on the TMS320F240 is developed, and its monitor control system designed.

在上述工作的基础上，研制开发了一套基于TMS320F240的高性能全数字永磁交流伺服系统，并设计开发了相应的上位机监控软件。

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