Asymmetric PWM Control Scheme During Hold-Up Time for Resonant Converter

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To narrow down the switching-frequency-variation range of an LLC resonant converter, asymmetric pulsewidth modulation (APWM) of the hold-up time is proposed. During the hold-up time, the modulation method of an LLC resonant converter is changed from frequency modulation (FM) to APWM. Since the LLC resonant converter achieves a higher gain with APWM than it does with FM at the same switching frequency, the switching-frequency-variation range is reduced. Therefore, an optimal design of the magnetic components is possible, resulting in a high efficiency under normal operation and a high power density. The proposed control scheme is applied to an 85-W LLC resonant converter.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-07
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.59, no.7, pp.2992 - 2997

ISSN
0278-0046
DOI
10.1109/TIE.2011.2166237
URI
http://hdl.handle.net/10203/96249
Appears in Collection
GT-Journal Papers(저널논문)EE-Journal Papers(저널논문)
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