一种新颖的零电压转换PFC变换器设计

Design of a Novel ZVT PFC Converter

本文提出了一种带有源箝位的 ZVI-PWM 升压 PFC 变换器。洋细分析了该变换器的工作原理.讨论了电路的参数.进行了软件仿真,并在一台功率为3kW、T 作频率为100kHz 的通信用开关电源装置上进行了实验验证。仿真和实验结果都证明了这种变换器不仅可实现主开关管的零电压转换和辅助开关管的零电流开关,而且开天管的电压电流应力非常小,同时变换器效率可高达94%。

A novel single-phase active clamped Power Factor Correction converter is presented in this paper.The operation principle and the circuit parameters of the converter are analyzed in detail.The proposed scheme is verificd on the 3kW prototype converter op- crating at 100kHz.Simulating and experimental results proved that this circuit not only realizes the ZVT of the main switch and ZCS of the auxiliary switch,but also has the low current and voltage stress,meanwhile,the overall efficiency of the proposed converter is 94%.systems.