This paper introduces the features of the frequency control technique of AC motor, and expounds the present situation, developing trends and applicability of the converter technique.
介绍了交流电动机变频调速技术的特点，阐述了变频技术的现状和发展趋向及其应用领域。
A novel topology of high frequency link DC ac converter with bi directional flyback mode is proposed, and its operational principle and control strategy are introduced briefly.
提出了一种新颖的双向电流源高频链DC A C功率变换器的拓扑结构，并简要地阐述了其工作原理和控制方案。
A novel topologic structure of high frequency AC pulse density modulation converter is proposed, and its operation principle, control scheme and design are described in detail.
提出了一种新颖的高频交流脉冲密度调制变频器的拓扑结构，并详细阐述了工作原理、控制方案和设计方法。
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