基于双Boost交联拓扑的三相功率因数校正器

研究了基于双Boost交联拓扑的三相功率因数校正器,其主支路三相不控整流器通过外加并联功率因数校正电路来改善网侧电流波形,提高功率因数。首先对主支路的拓扑结构以及工作方式进行分析,总结该拓扑的特点,并针对其特点提出相应的控制策略以及参数设计方案。理论分析和仿真、实验结果表明:这种新型三相功率因数校正器适用于恒功率负载场合,只需通过控制从整流器的选相开关以及双Boost交联变换器即可获得稳定的6脉波直流输出电压、理想的功率因数以及总谐波畸变率,而仅有约1/5的功率经过双Boost交联变换器。

Three-phase power factor corrector based on cross-linked bi-Boost topology

A kind of three-phase power factor corrector based on cross-linked bi-Boost topology is presented. Its power factor corrector is connected with the main circuit, i. e. three-phase diode bridge rectifier, in parallel to improve the current waveform at grid side and increase the power factor. By analyzing the topology and working modes of the main circuit, the characteristics of its topology are summarized, and the corresponding control strategy and parameter design methods are put forward. The theoretical analysis, simulative and experimental results show that the novel three-phase power factor corrector is suitable for constant power load. The switches of subordinate rectifier and the cross-linked bi-Boost converter can be easily controlled to achieve the stable six-pulse DC output voltage and the ideal power factor and total harmonic distortion, with only 1/5 of the power passing through the cross-linked bi-Boost converter.