Hybrid Control Switching Technology for LLC Resonant Converter

Jie Zhang and Zhixiao Cai ()
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Jie Zhang: School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430070, China
Zhixiao Cai: School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430070, China

Energies, 2024, vol. 17, issue 24, 1-19

Abstract: Aiming at the problem of the circuit operating frequency changing beyond the regulation range and zero switching not being guaranteed when the input voltage range of the LLC resonant converter is large, a hybrid control technology with a variable structure and variable mode is proposed in this paper to realize the wide input range of the LLC resonant converter. Depending on the input voltage range, this technology can ensure the frequency range of the circuit and meet the realization conditions of zero voltage switching (ZVS) in different modes. The test results show that the circuit can control the frequency at 0 kHz~200 kHz, the phase shift range is 0~2π/5, the maximum voltage gain multiple is 3.3 times, and the control mode is three PWM hybrid switching control.

Keywords: LLC resonant converter; wide input range; hybrid control; 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: 2024
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