一种新型的全桥零电压零电流开关PWM变换器  

A NOVEL ZERO-VOLTAGE AND ZERO-CURRENT-SWITCHING (ZVZCS) FULL- BRIDGE PWM CONVERTER

作　　者：许峰[1] 徐殿国[1] 柳玉秀[1] 

机构地区：[1]哈尔滨工业大学电气工程系,黑龙江哈尔滨150001

出　　处：《中国电机工程学报》2004年第1期147-152,共6页Proceedings of the CSEE

摘　　要：提出一种新型的FB-ZVZCS-PWM 变换器拓扑,采用耦合电感构成辅助电路,结构简单、没有耗能元件或有源开关,不增加原边电流应力。新拓扑具有良好的通用性,对采用不同箝位方式如阻容吸收、次级无源箝位或有源箝位的全桥变换器均适用。变换器主开关管全部采用IGBT,开关频率大幅提高,功率密度、轻载效率及软开关负载范围显著改善,而变换器成本降低。给出了变换器拓扑结构、关键参数设计及实测波形,新拓扑已应用在3kW,350VDC变换器中。A novel zero voltage and zero current switching (ZVZCS)full bridge(FB)pulse width modu lation (PWM) converter is proposed and analyzed.An auxiliary circuit which consists of a coupled output inductor and a diode,is adapted to provide zero- current switching (ZCS) conditions to the primary lagging-leg switches.Many advantages including simple circuit topology,high efficiency,and low cost make the new converter attractive for high power appficati- ons.The operation,analysis,features and design considerations are illustrated and verified on a 3 kW,100kHz insulated gate bipolar transistor(IGBT) based experimental circuit.

关 键 词：全桥零电压零电流开关PWM变换器 功率密度 辅助电路 耦合电感 

分 类 号：TN624[电子电信—电路与系统]