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Modeling of ZVS Transitions for Efficiency Optimization of the Phase-Shifted Full-Bridge Topology
IEEE Journal of Emerging and Selected Topics in Power Electronics ( IF 5.5 ) Pub Date : 2019-10-31 , DOI: 10.1109/jestpe.2019.2950843
Ali Shahabi , Andrew N. Lemmon

The emergence of wide bandgap semiconductors paved the way for integration of high-efficiency, high-power-density converters into industrial applications. Key to achieving these performance goals is operation at high switching frequencies, which requires mitigation of switching losses by schemes, such as zero-voltage switching (ZVS). The phase-shifted fullbridge (PSFB) converter is a very appealing converter for such industrial applications. However, the mechanisms that underlie the operation of ZVS within this topology are complex, as they depend on the coupled influence of multiple system parameters. This article aims to provide a detailed analytical treatment of the ZVS mechanisms within this topology, along with a detailed study of the interdependence of the associated critical system parameters. A prototype 10-kW, SiC-based PSFB converter is employed to aid this discourse and provide empirical validations. The outcome of these studies is leveraged to identify a set of practical guidelines for tuning the ZVS mechanisms. These guidelines also consider the impact of practical nonidealities, which are often neglected in the literature. Overall, the theoretical formulations, parametric trade studies, and practical implementation suggestions presented in this article constitute a set of tools that designers can utilize to obtain the full performance entitlement of this topology in practice.

中文翻译:

ZVS过渡建模以优化相移全桥拓扑

宽带隙半导体的出现为将高效率,高功率密度转换器集成到工业应用中铺平了道路。实现这些性能目标的关键是在高开关频率下运行,这需要通过诸如零电压开关(ZVS)之类的方案来减轻开关损耗。相移全桥(PSFB)转换器对于此类工业应用而言是非常有吸引力的转换器。但是,ZVS在此拓扑内运行的基础机制很复杂,因为它们取决于多个系统参数的耦合影响。本文旨在提供对该拓扑内ZVS机制的详细分析处理,以及对相关关键系统参数的相互依赖性的详细研究。原型10千瓦 基于SiC的PSFB转换器用于辅助这一论述并提供经验验证。这些研究的结果被用来确定一套用于调整ZVS机制的实用指南。这些指南还考虑了实践中非理想性的影响,这在文献中经常被忽略。总体而言,本文介绍的理论公式,参数化贸易研究和实际实施建议构成了一组工具,设计人员可以在实践中使用这些工具来获得此拓扑的全部性能。在文献中经常被忽略。总体而言,本文介绍的理论公式,参数贸易研究和实际实施建议构成了一组工具,设计人员可以在实践中使用这些工具来获得此拓扑的全部性能。在文献中经常被忽略。总体而言,本文介绍的理论公式,参数贸易研究和实际实施建议构成了一组工具,设计人员可以在实践中使用这些工具来获得此拓扑的全部性能。
更新日期:2020-04-22
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