Extension of Zero Voltage Switching Capability for CLLC Resonant Converter

HwaPyeong Park, DoKyoung Kim, SeungHo Baek and JeeHoon Jung
Additional contact information
HwaPyeong Park: Ulsan National Institute of Science and Technology (UNIST), Ulsan KS017, Korea
DoKyoung Kim: LIG Nex1, Seongnam KS009, Korea
SeungHo Baek: LIG Nex1, Seongnam KS009, Korea
JeeHoon Jung: Ulsan National Institute of Science and Technology (UNIST), Ulsan KS017, Korea

Energies, 2019, vol. 12, issue 5, 1-14

Abstract: TheCLLC resonant converter has been widely used to obtaina high power conversion efficiency with sinusoidal current waveforms and a soft switching capability. However, it has a limited voltage gain range according to the input voltage variation. The current-fed structure canbe one solution to extend the voltage gain range for the wide input voltage variation, butit has a limited zero voltage switching (ZVS) range. In this paper, the current-fed CLLC resonant converter with additional inductance is proposed to extend the ZVS range. The operational principle is analyzed to design the additional inductance for obtaining the extended ZVS range. The design methodology of the additional inductance is proposed to maximize the ZVS capability for the entire load range. The performance of the proposed method is verified with a 20 W prototype converter.

Keywords: resonant converter; bidirectional power conversion; zero voltage switching; asymmetric pulse width modulation (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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