Abstract

The paper Presents an improved method of generating a three-phase stepped-voltage waveform using ten thyristor power switches. In the proposed method, it is possible to generate one step for every 20 ° of the voltage waveform on all the phases. The waveform has a total harmonic distortion of about 10% and the Predominant harmonies are the 17th and 19th. This is possible by a unique method of magneticcoupling betweena 120° conduction three-phase bridge inverter and a triple frequency single phase bridge inverter. The theoretical results are in close agreement with experimental results.

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