Adopt IGBT frequency conversion of German Siemens and voltage feedback series resonance circuit. The conversion efficiency is reaching up to above 97.5%.

采用德国西门子IGBT变频，电压反馈串联谐振电路。变换效率高达97.5%以上。

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In this paper, we present a frequency conversion electromotor system organized by voltage vector transducer and induction-motor.

本文研究了用电压矢量变频器和感应电动机构成的变频电动机系统。

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The system constitution is simplified by using gyrator transmission network to realize the live conversion of voltage and frequency, thus greatly enhancing the upper output frequency.

该方法利用回转器构成传输网络实现变压变频，使系统结构简化，且输出频率上限大幅度提高。

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