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Hybrid mode-hopping modulation for LLC resonant converter achieving high efficiency and linear behaviour
Fang, Zhijian1,2; Huang, Zhicong3,4; Jing, Hang5; Liu, Fei5
2020-05-01
Source PublicationIET Power Electronics
ISSN1755-4535
Volume13Issue:6Pages:1153-1162
Abstract

Frequency modulation (FM) has been widely used in the inductor-inductor-capacitor (LLC) resonant converter due to excellent soft switching features. However, low power efficiency in light load conditions and complex control due to the nonlinear converter behaviour are common concerns for the FM method. In this study, a hybrid mode-hopping modulation method is proposed for the LLC resonant converter to address these challenges. The LLC resonant converter operates at any two of three power-efficient operating modes for a different amount of time within a single modulation period. By determining the mode hopping time and combining different mode-hopping modulations, the LLC resonant converter can achieve a wide range of output power and maintain high efficiency at the same time. Besides, since the switching frequencies are fixed, the relationships between the duty cycle and the output power are linear, which can significantly simplify the control design. Compared with the existing modulation methods, the proposed hybrid mode-hopping modulation makes the LLC resonant converter behaves linear, simplifies the control design, achieves wide operation range and ensures high efficiency even in light load condition.

DOI10.1049/iet-pel.2019.1029
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000529189200004
PublisherWILEY, 111 RIVER ST, HOBOKEN 07030-5774, NJ
Scopus ID2-s2.0-85084010453
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Citation statistics
Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorHuang, Zhicong
Affiliation1.School of Automation, China University of Geosciences, Wuhan, China
2.Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems, Wuhan, China
3.State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macao
4.Shien-Ming Wu School of Intelligent Engineering, South China University of Technology, Guangzhou, China
5.School of Electrical Engineering, Wuhan University, Wuhan, China
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Fang, Zhijian,Huang, Zhicong,Jing, Hang,et al. Hybrid mode-hopping modulation for LLC resonant converter achieving high efficiency and linear behaviour[J]. IET Power Electronics,2020,13(6):1153-1162.
APA Fang, Zhijian,Huang, Zhicong,Jing, Hang,&Liu, Fei.(2020).Hybrid mode-hopping modulation for LLC resonant converter achieving high efficiency and linear behaviour.IET Power Electronics,13(6),1153-1162.
MLA Fang, Zhijian,et al."Hybrid mode-hopping modulation for LLC resonant converter achieving high efficiency and linear behaviour".IET Power Electronics 13.6(2020):1153-1162.
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