Fully-Integrated Transformer With Asymmetric Primary and Secondary Leakage Inductances for a Bidirectional Resonant Converter
Fully-Integrated Transformer With Asymmetric Primary and Secondary Leakage Inductances for a Bidirectional Resonant Converter
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DOI：
10.1109/tia.2023.3252525
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发表时间：
2023-05
影响因子：
4.4
通讯作者：
Sajad A. Ansari;J. Davidson;M. Foster
中科院分区：
文献类型：
--
作者：
Sajad A. Ansari;J. Davidson;M. Foster
通常，插入分流集成变压器具有对称的初级和次级泄漏电感。然而，双向谐振转换器通常在具有不同的初级和次级串联电感的情况下更有效地操作。本文提出了一种新型的插并联集成Transformer拓扑结构，它可以在原边和副边提供可调的、不对称的漏（串联）电感。两个具有适当气隙的磁分流器插入两个E芯之间，并且初级绕组和次级绕组通过放置在分流器的相对侧而分离。建议的Transformer进行了详细分析，建模和设计准则。它示出的磁化电感和初级和次级漏感是相互解耦的，它们可以单独确定。该设计具有使用市场上可买到的平面E芯和导磁片的优点。仿真和实验结果验证了理论分析的正确性。此外，为了证明所提出的集成Transformer在实践中的性能，一个示范性的双向CLLLC谐振转换器的设计，构造和测试使用新的集成Transformer。
Typically, inserted-shunt integrated transformers have symmetric primary and secondary leakage inductances. However, bidirectional resonant converters typically operate more efficiently with different primary and secondary series inductances. In this paper, a new topology for an inserted-shunt integrated transformer which can provide tunable, asymmetric leakage (series) inductances on the primary and secondary sides is presented. Two magnetic shunts, with appropriate air gaps, are inserted between two E-cores and the primary and secondary windings are separated by being placed at opposite sides of the shunts. The proposed transformer is analysed in detail and modelling and design guidelines are provided. It is shown that the magnetising inductance and the primary and secondary leakage inductances are decoupled from each other, and they can be determined separately. The design has the advantage of using planar E-cores and magnetically permeable sheets that are commercially available. The theoretical analysis is verified by simulation and experimental results. In addition, to demonstrate the performance of the proposed integrated transformer in practice, an exemplar bidirectional CLLLC resonant converter is designed, constructed and tested using the new integrated transformer.