High frequency AC inductor analysis and design for dual active bridge (DAB) converters

2016 IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2016-03-20 DOI:10.1109/APEC.2016.7468006

Zhe Zhang, M. Andersen

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引用次数: 17

Abstract

The dual active bridge (DAB) converter is an isolated bidirectional dc-dc topology which is the most critical part for the power conversion systems such as solid-state transformers (SST). This paper focuses on analysis and design of high frequency ac inductors which are the power interfacing component in DAB converters or DAB's derivative topologies for transferring energy between the primary and secondary sides. The DAB converter's operation principles, and the corresponding voltage and current stresses over its ac inductor are analyzed. Hereby, six diverse winding arrangements are studied in order to find a design having the lowest ac resistance and core loss. Core loss is calculated by both GSE and iGSE methods, and then the results are compared under two operating conditions. Based upon the finite element method (FEM) simulation, winding losses are investigated. Finally, the case in which the core loss and the winding loss are almost equal is selected as the optimal one. The experimental results are presented to verify the validity of the analysis and design.

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双有源桥(DAB)变换器高频交流电感分析与设计

双有源桥式(DAB)变换器是一种隔离的双向dc-dc拓扑结构，是固态变压器(SST)等电力转换系统中最关键的部分。高频交流电感是DAB变换器或DAB衍生拓扑中的电源接口元件，主要用于在一次侧和二次侧之间传递能量。分析了DAB变换器的工作原理，并对其交流电感的电压和电流应力进行了分析。因此，研究了六种不同的绕组布置，以找到一种具有最低交流电阻和铁芯损耗的设计。采用GSE法和iGSE法分别计算了堆芯损耗，并对两种工况下的计算结果进行了比较。基于有限元模拟方法，对绕组损耗进行了研究。最后，选择铁心损耗与绕组损耗基本相等的情况作为最优情况。实验结果验证了分析和设计的有效性。

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2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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