A novel PWM strategy to minimize the surge voltage forcurrent-source converters |
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| Authors: | Matsui K. Yamaguchi T. Takase S. Yue Yang |
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| Affiliation: | Dept. of Electr. Eng., Chubu Univ., Kasugai; |
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| Abstract: | This paper presents a novel technique of pulsewidth modulation (PWM) wave control to minimize the surge voltage at the turn-off of switching devices. Two kinds of sawtooth carriers with different hypotenuses are employed to obtain a PWM waveform with minimum surge voltage, where each sawtooth carrier appears alternately at every 60° interval relative to the sinusoidal wave cycle. It is difficult to analyze the output waveforms because they are complicated. In order to obtain the analytical result, a frequency analysis approach using a switching function is proposed the results of which are verified experimentally |
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