High‑frequency planar transformer optimal design and analysis

Yu Tang; Guanghui Wang; Zhe Shi; Jincai Niu

High‑frequency planar transformer optimal design and analysis

Vol. 23, No. 2, pp. 202-210, Feb. 2023

10.1007/s43236-022-00540-9

DC–DC converter

Matrix transformer

Loss model

Winding structure optimization

Abstract

Due to the rapid development of modern industry, there is an increasing demand for isolated switching power supplies (SMPS) with a high efficiency and a high power density. Magnetic components, which occupy most of the converter volume, have been a key bottleneck in achieving high power density. This paper presents an optimal design method for high power density planar transformers. Applying the principle of flux cancellation, a matrix transformer that originally needed an independent magnetic core was integrated into a single magnetic core to reduce the volume of the core. Meanwhile, a loss model of the transformer is established, and an optimized design method of the winding structure is given according to that model to further reduce the winding loss of the transformer. Finally, an LLC converter with a resonant frequency of 1 MHz is designed to verify the practical performance of the proposed transformer.

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Cite this article

[IEEE Style]

Y. Tang, G. Wang, Z. Shi, J. Niu, "High‑frequency planar transformer optimal design and analysis," Journal of Power Electronics, vol. 23, no. 2, pp. 202-210, 2023. DOI: 10.1007/s43236-022-00540-9.

[ACM Style]

Yu Tang, Guanghui Wang, Zhe Shi, and Jincai Niu. 2023. High‑frequency planar transformer optimal design and analysis. Journal of Power Electronics, 23, 2, (2023), 202-210. DOI: 10.1007/s43236-022-00540-9.