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Novel zero-voltage and zero-current-switching full bridge PWM converter using transformer auxiliary winding

机译:利用变压器辅助绕组的新型零电压零电流开关全桥PWM转换器

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摘要

A novel zero voltage and zero current switching (ZVZCS) full bridge (FB) pulse width modulation (PWM) converter is proposed to improve the demerits of the previously presented ZVZCS-FB-PWM converters, such as use of lossy components or additional active switches. A simple auxiliary circuit which includes neither lossy components nor active switches provides ZVZCS conditions to primary switches, ZVS for leading-leg switches and ZCS for lagging-leg switches. Many advantages including simple circuit topology, high efficiency, and low cost make the new converter attractive for high power (<2 kW) applications. The operation, analysis, features and design considerations are illustrated and verified on a 2.5 kW, 100 kHz insulated gate bipolar transistor (IGBT) based experimental circuit.
机译:提出了一种新颖的零电压零电流开关(ZVZCS)全桥(FB)脉宽调制(PWM)转换器,以改善先前介绍的ZVZCS-FB-PWM转换器的缺点,例如使用有损组件或附加有源开关。一个既不包含有损元件也不包含有源开关的简单辅助电路可为主开关提供ZVZCS条件,为前臂开关提供ZVS,为后腿开关提供ZCS。新的转换器具有许多优点,包括简单的电路拓扑,高效率和低成本,因此吸引了大功率(<2 kW)应用。在基于2.5 kW,100 kHz绝缘栅双极晶体管(IGBT)的实验电路上说明并验证了操作,分析,特性和设计注意事项。

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