Discontinuous-current mode operation of a semi-dual-bridge resonant converter

2016 IEEE International Conference on Industrial Technology (ICIT) Pub Date : 2016-03-14 DOI:10.1109/ICIT.2016.7474767

Song Hu, Ming Lu, Boyue Luan, Xiaodong Li

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引用次数: 2

Abstract

A semi-dual-bridge resonant converter derived from the popular dual-bridge resonant converter (DBRC) topology is proposed in this paper for applications requiring only unidirectional power flow such as various types of DC power supplies, battery chargers in electric vehicles and dc-dc stage of different types of photovoltaic inverters. Based on the similarity of topology to the DBRC converter, the new converter is expected to inherit most advantages from the DBRC converter - such as soft-switching, high power density and simple control. Besides, the proposed converter has a simpler structure with lower cost and the high circulation energy in output bridge is eliminated. The operating principles and waveforms in discontinuous-current mode (DCM) are presented in detail. It can be shown that all switches can be turned off softly at zero current. Steady-state analysis of the converter in DCM is performed using differential equation (DE) approach. A design example based on the analysis results is presented and then verified through simulation and experiment.

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半双桥谐振变换器的断续电流模式工作

本文在目前流行的双桥谐振变换器(DBRC)拓扑的基础上，提出了一种半双桥谐振变换器，适用于各类直流电源、电动汽车电池充电器以及各类光伏逆变器的DC - DC级等只需要单向潮流的应用。基于与DBRC变换器拓扑结构的相似性，新型变换器有望继承DBRC变换器的大部分优点，如软开关、高功率密度和简单控制。此外，该变换器结构简单，成本低，消除了输出桥的高循环能量。详细介绍了断流模式(DCM)的工作原理和波形。可以看出，所有的开关都可以在零电流下轻轻地关断。采用微分方程方法对DCM变换器进行了稳态分析。根据分析结果给出了一个设计实例，并通过仿真和实验进行了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE International Conference on Industrial Technology (ICIT)

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