Multilayer Flexible Printed Circuitry Planar Transformer With Integrated Series Capacitance for an LLC Converter
Multilayer Flexible Printed Circuitry Planar Transformer With Integrated Series Capacitance for an LLC Converter
复制标题
用于 LLC 转换器的具有集成串联电容的多层柔性印刷电路平面变压器
DOI：
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发表时间：
2019
影响因子：
6.7
通讯作者：
B. Pong
中科院分区：
文献类型：
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作者：
G. K. Y. Ho;B. Pong
LLC 谐振转换器很受欢迎，但需要分立串联谐振电感器和电容器。为了减少元件数量，本文提出了一种集成串联电容和电感的新型多层柔性印刷电路（FPC）平面变压器。该平面变压器由两组相互耦合的多层开放式绕组组成，以产生集成谐振电容器。等效谐振电容可以通过层数来控制，而不改变初级绕组匝数或图案。所提出的变压器成功地将谐振电容器和谐振电感器集成到单个组件中。建立模型从物理结构上准确预测变压器的等效串联谐振电容。构建了多个多层 FPC 平面变压器来测试该模型。实际测量和理论结果显示出良好的一致性并验证了所提出的模型。最后，构建了一个效率为 94% 的 LLC 电源转换器，以演示所提出的多层 FPC 平面变压器的正常运行。
The LLC resonant converter is popular but needs a discrete series resonant inductor and a capacitor. In order to cut down component count, a novel multilayer flexible printed circuitry (FPC) planar transformer with integrated series capacitance and inductance is proposed in this paper. This planar transformer consists of two sets of multilayer open-ended windings coupled with each other to produce the integrated resonant capacitor. The equivalent resonant capacitance can be controlled by the number of the layers without changing the number of primary winding turns or pattern. The proposed transformer successfully integrates the resonant capacitor and the resonant inductor, into a single component. A model is established to accurately predict the equivalent series resonant capacitance of the transformer from the physical structure. Several multilayer FPC planar transformers are built to test the model. Practical measurements and theoretical results show good agreement and validate the proposed model. Finally, an LLC power converter with 94% efficiency is built to demonstrate the proper functioning of the proposed multilayer FPC planar transformer.