In this paper, a three-phase buck-type unity power factor rectifier is designed for high-power electric vehicle battery charging mains interfaces. The characteristics of the converter, named the Swiss Rectifier (SR), including the principle of operation, modulation strategy, suitable control structure, and dimensioning equations are described in detail. Exemplarily, a 7.5 kW hardware prototype is then designed based on the derived analytical expressions and the feasibility of the SR concept is demonstrated by the means of experimental measurements. Finally, the SR is compared with a conventional six-switch buck-type ac–dc power conversion. According to the results, the SR is the topology of choice for a buck-type PFC.
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Soeiro et al. (2012) studied this question.
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