Inserted-Shunt Integrated Planar Transformer With Low Secondary Leakage Inductance for LLC Resonant Converters
Inserted-Shunt Integrated Planar Transformer With Low Secondary Leakage Inductance for LLC Resonant Converters
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DOI：
10.1109/tie.2022.3165259
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发表时间：
2023
影响因子：
7.7
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
集成Transformer的漏感通常用作LLC拓扑的串联电感器。然而，集成Transformer的原边和副边都存在漏感，副边漏感给变换器的控制和设计带来困难。本文提出了一种新型的具有低次级漏感的插并联集成变压器拓扑结构。所提出的拓扑结构的插入分流器不是分段的，并且可以方便地位于Transformer内。此外，插入的分流器不需要低磁导率芯材料，简化了其制造。所提出的Transformer拓扑结构的设计和建模，并通过有限元分析和实验实现验证。还将所提出的拓扑结构与最近发布的插入分段分流集成变压器进行了比较。Transformer。结果表明，建议的Transformer提供更高的效率和更低的交流电阻。最后，一个LLC谐振转换器的实施，以检查所提出的集成Transformer在实践中的性能。
The leakage inductance of an integrated transformer is usually utilized as the series inductor of an LLC topology. However, leakage inductance exists on both primary and secondary sides of an integrated transformer and secondary leakage inductance leads the control and design of the converter to difficulty. In this article, a novel topology forinserted-shunt integrated transformers is proposed that has low secondary leakage inductance. The inserted shunt of the proposed topology is not segmental and can be located conveniently within the transformer. In addition, the inserted shunt does not require low permeability core material, simplifying its manufacture. The design and modeling of the proposed transformer topology are presented and verified by finite-element analysis and experimental implementation. The proposed topology is also compared with a recently published inserted-segmental-shunt integrated transformer. It is shown that the proposed transformer provides higher efficiency and lower ac resistance. Finally, an LLC resonant converter is implemented to examine the performance of the proposed integrated transformer in practice.