A new family of zero-current-switching PWM converters and a novel HPF-ZCS-PWM boost rectifier

F. T. Wakabayashi, C. Canesin
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引用次数: 27

Abstract

This work presents a new family of DC to DC converters based on a new zero-current-switching (ZCS) pulse-width-modulated (PWM) soft-commutation cell. Two transistors (main and auxiliary switches), two diodes, two small resonant inductors and one resonant capacitor compose this commutation cell, appropriated to operate with insulated-gate bipolar transistors (IGBTs) as the power switches. This new ZCS-PWM cell provides a zero-voltage (ZV) turn-on to the diodes, a zero-current (ZC) turn-on and a zero-current-zero-voltage (ZCZV) turn-off to the transistors. The new family of converters, originated from the proposed ZCS-PWM cell, offers conditions to obtain isolated converters, as example: derived buck-boost, Sepic and Zeta converters. An application of the new commutation cell in a new ZCS-PWM boost rectifier is developed, obtaining a structure with power factor near unity, high efficiency at wide load range and low total harmonic distortion (THD) in the input current. The principle of operation, the theoretical analysis and the design procedure are presented. A design example is developed and experimental results to the new high-power-factor (HPF) ZCS-PWM boost rectifier are presented to verify the theoretical analysis.
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新型零电流开关PWM变换器和新型HPF-ZCS-PWM升压整流器
本文提出了一种基于新型零电流开关(ZCS)脉宽调制(PWM)软换相单元的新型DC - DC变换器。两个晶体管(主开关和辅助开关)、两个二极管、两个小型谐振电感和一个谐振电容组成该整流单元,适合与绝缘栅双极晶体管(igbt)作为电源开关工作。这种新的ZCS-PWM单元为二极管提供零电压(ZV)导通,零电流(ZC)导通和零电流-零电压(ZCZV)关断。新的转换器家族源于所提出的ZCS-PWM单元,提供了获得隔离转换器的条件,例如:派生buck-boost, Sepic和Zeta转换器。研究了新型换向单元在新型ZCS-PWM升压整流器中的应用,获得了功率因数接近一致、宽负载范围效率高、输入电流总谐波畸变低的结构。介绍了其工作原理、理论分析和设计过程。最后给出了高功率因数(HPF) ZCS-PWM升压整流器的设计实例和实验结果,验证了理论分析。
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