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Implementation of single-phase boost power-factor-correction circuits in three-phase applications

机译:在三相应用中实现单相升压功率因数校正电路

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摘要

A three-phase rectifier employing three single-phase boost power-factor-correction circuits is analyzed. Each converter operates in the continuous conduction mode (CCM), which allows a high power factor and a small EMI filter. Current sharing is ensured by a common voltage loop driving the individual current loops of the three converters. A suitable circuit arrangement is devised to limit phase interaction. The zero-voltage-transition technique (ZVT) is successfully applied to each converter, in order to obtain zero turn on losses and soft turnoff of the freewheeling diodes. Results of a 1800-W 100-kHz experimental prototype are reported, which confirm the theoretical forecasts.
机译:分析了采用三个单相升压功率因数校正电路的三相整流器。每个转换器都在连续导通模式(CCM)下工作,这允许高功率因数和小EMI滤波器。共用的电压环路驱动三个转换器的各个电流环路,从而确保了电流共享。设计了合适的电路布置以限制相位相互作用。零电压转换技术(ZVT)已成功应用于每个转换器,以便获得续流二极管的零导通损耗和软关断。报告了1800 W 100 kHz实验原型的结果,证实了理论预测。

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