Pseudo-Partial-Power Switch-Multiplexed Resonant Converter with Wide Voltage Gain

Xiaoying Chen, Zehong Yao, Yizhan Zhuang and Yiming Zhang ()
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Xiaoying Chen: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
Zehong Yao: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
Yizhan Zhuang: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
Yiming Zhang: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China

Energies, 2025, vol. 18, issue 22, 1-18

Abstract: Full-bridge resonant converters have gained widespread adoption due to their excellent performance characteristics. However, these converters face limitations in terms of gain expansion. To address this issue, this paper proposes a switch-multiplexed resonant converter with wide voltage gain. By employing an auxiliary capacitor and inductor, the converter can achieve pseudo partial power processing and effectively expand its voltage gain. To regulate the voltage of the converter, the duty cycle of the switching devices is designed to be modulated, which is different from the conventional resonant converter. By optimizing the design parameters, the resonant current of converter can operate in discontinuous current mode (DCM), eliminating reverse recovery losses and/or minimizing reactive current. All switching devices achieve soft switching, thereby removing switching losses and further enhancing efficiency. Finally, a 1 kW prototype is built to validate the effectiveness of the proposed converter.

Keywords: pseudo partial power; resonant converter; soft switching; wide voltage gain (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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