高效三相准单级PFC DC-DC变换器

本文提出了一种新颖带三相PFC的准单级AC-DC变换器拓扑。该拓扑具有所有功率开关都是软开关，输出二极管电压应力低和输入输出滤波器小的特性。一个380VAC±30%输入、40-60VDC输出、整机效率为93%的6kW样机验证了该拓扑输入电流的谐波满足IEC61000-3-2 Class A标准。实验结果显示该拓扑具有低成本、体积小、重量轻、效率高以及安全可靠等特点。

High Efficiency 3-phase Input Quasi-Single-Stage PFC DC-DC Converter

A novel quasi-single-stage topology for 3-phase input AC-DC converter with power factor correction (PFC) is presented. Soft-switching conditions of all switches,are as follows: low voltage stresses on the output diodes, and smaller input and output filters in this topology. A 6kW prototype with 380VAC+/-30% input, 40~60VDC output is built and efficiency is about 93%. The input harmonic current meets IEC61000-3-2 Class A standard, and total harmonic distortion level is about 10% at rated input voltage. Experimental results show that the novel AC-DC converter with PFC has the advantage of low cost, small size, light weight and high efficiency.