A novel ZCS-PWM power-factor preregulator with reduced conduction losses

被引：48

作者：

Wang, CM ^{[1
]}

机构：

[1] Lunghwa Univ Sci & Technol, Dept Elect Engn, Taoyuan 333, Taiwan

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2005年 / 52卷 / 03期

关键词：

power-factor correction (PFC); rectifier; zero-current switching (ZCS);

D O I：

10.1109/TIE.2005.843967

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper proposes a new single-phase high-power-factor rectifier, which features regulation by conventional pulsewidth modulation (PWM), soft commutation, and instantaneous average line current control. A new zero-current-switching PWM (ZCS-PWM) auxiliary circuit is configured in the presented ZCS-PWM rectifier to perform ZCS in the active switches and zero-voltage switching in the passive switches. Furthermore, soft commutation of the main switch is achieved without additional current stress by the presented ZCS-PWM auxiliary circuit. A significant reduction in the conduction losses is achieved, since the circulating current for the soft switching flows only through the auxiliary circuit and a minimum number of switching devices are involved in the circulating current path and the proposed rectifier uses a single converter instead of the conventional configuration composed of a four-diode front-end rectifier followed by a boost converter. Nine transition states for describing the behavior of the ZCS-PWM rectifier in one switching period are described. The PWM switch model is used to predict the system performance. A prototype rated at I kW, operating 50 kHz, with an input ac voltage of 220 V-rms and an output voltage 400 V-dc has been implemented in laboratory. An efficiency of 97.3% and power factor over 0.99 has been measured. Analysis, design, and the control circuitry are also presented in this paper.

引用

页码：689 / 700

页数：12

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