Phase-Shift Triple Full-Bridge ZVZCS Converter with All Soft Switched Devices

Junjie Zhu; Qinsong Qian; Shengli Lu; Weifeng Sun

Phase-Shift Triple Full-Bridge ZVZCS Converter with All Soft Switched Devices

Vol. 19, No. 6, pp. 1337-1350, Nov. 2019

10.6113/JPE.2019.19.6.1337

Phase-shift triple full-bridge

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Abstract

This paper proposes a Phase-Shift Triple Full-Bridge (PSTB) Zero-Voltage Zero-Current-Switching (ZVZCS) converter with a high switching frequency and high efficiency. In the proposed converter, all three bridge legs are shared leading-legs, and all three transformers work in the Discontinuous Conduction Mode (DCM). Thus, all of the switches and diodes in the PSTB ZVZCS can be soft switched. Moreover, since all of the transformers can pass energy from the primary-side to the secondary- side when their primary-side currents are not zero, there is no circulating current. As a result, the PSTB ZVZCS converter can achieve a high efficiency at high operating frequencies. A theoretical analysis and the characteristics of the proposed converter are presented and verified on a 1MHz 200~300V/24V 1.2kW hardware prototype. The proposed converter can reach a peak efficiency of 96.6%.

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Cite this article

[IEEE Style]

J. Zhu, Q. Qian, S. Lu, W. Sun, "Phase-Shift Triple Full-Bridge ZVZCS Converter with All Soft Switched Devices," Journal of Power Electronics, vol. 19, no. 6, pp. 1337-1350, 2019. DOI: 10.6113/JPE.2019.19.6.1337.

[ACM Style]

Junjie Zhu, Qinsong Qian, Shengli Lu, and Weifeng Sun. 2019. Phase-Shift Triple Full-Bridge ZVZCS Converter with All Soft Switched Devices. Journal of Power Electronics, 19, 6, (2019), 1337-1350. DOI: 10.6113/JPE.2019.19.6.1337.