Resonant Tank Design Considerations and Implementation of a LLC Resonant Converter with a Wide Battery Voltage Range

Wenjin Sun; Hongfei Wu; Haibing Hu; Yan Xing

Resonant Tank Design Considerations and Implementation of a LLC Resonant Converter with a Wide Battery Voltage Range

Vol. 15, No. 6, pp. 1446-1455, Nov. 2015

10.6113/JPE.2015.15.6.1446

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Abstract

This paper illustrates resonant tank design considerations and the implementation of a LLC resonant converter with a wide battery voltage range based on the fundamental harmonic approximation (FHA) analysis. Unlike the conventional design at zero load, the parameter K (the ratio of the transformer magnetizing inductor Lm to the resonant inductor Lr) of the LLC converter in this paper is designed with two charging points, (Vo_min, Io_max1) and (Vo_max, Io_max2), according to the battery charging strategy. A 2.9kW prototype with an output voltage range of 36V to 72V dc is built to verify the design. It achieves a peak efficiency of 96%.

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Cite this article

[IEEE Style]

W. Sun, H. Wu, H. Hu, Y. Xing, "Resonant Tank Design Considerations and Implementation of a LLC Resonant Converter with a Wide Battery Voltage Range," Journal of Power Electronics, vol. 15, no. 6, pp. 1446-1455, 2015. DOI: 10.6113/JPE.2015.15.6.1446.

[ACM Style]

Wenjin Sun, Hongfei Wu, Haibing Hu, and Yan Xing. 2015. Resonant Tank Design Considerations and Implementation of a LLC Resonant Converter with a Wide Battery Voltage Range. Journal of Power Electronics, 15, 6, (2015), 1446-1455. DOI: 10.6113/JPE.2015.15.6.1446.