DocumentCode :
2511655
Title :
Analysis of the load sharing characteristics of the series-parallel connected interleaved LLC resonant converter
Author :
Gang Yang ; Dubus, Patrick ; Sadarnac, Daniel
Author_Institution :
Dept. of Electr. Machines & Power Syst., Ecole Super. d´Electricite, Gif-sur-Yvette, France
fYear :
2012
fDate :
24-26 May 2012
Firstpage :
798
Lastpage :
805
Abstract :
Based on the fundamental approximation equivalent circuit of a single cell LLC resonant converter, this paper has developed the equivalent circuit of the interleaved LLC resonant converter, with its primary side connected in series and its secondary side connected in parallel. The load sharing characteristics of the series-parallel connected interleaved LLC converter is then analyzed and a current sharing mathematical model is developed to illustrate the current sharing principles. A case example of a 300/12-18V, 2.5kW, 500kHz interleaved LLC resonant converter is designed and simulated to verify the proposed load sharing model. The established model´s error analysis is conducted and the developed model is proved to have relatively high precision in current continuous mode and satisfactory precision in current discontinuous mode. The Monte Carlo analysis is executed to get an overall review of current sharing among different frequencies and the Worst Case analysis is executed to reveal the sensitivity of different influencing factors. The paper provides innovative and valuable references for the dimensioning of series-parallel connected interleaved LLC resonant converters.
Keywords :
Monte Carlo methods; equivalent circuits; error analysis; resonant power convertors; sensitivity analysis; Monte Carlo analysis; current continuous mode; current discontinuous mode; current sharing mathematical model; frequency 500 kHz; fundamental approximation equivalent circuit; load sharing characteristic analysis; model error analysis; power 2.5 kW; sensitivity analysis; series-parallel connected interleaved LLC resonant converter; voltage 12 V to 18 V; voltage 300 V; worst case analysis; Capacitors; Equations; Equivalent circuits; Inductance; Load modeling; Mathematical model; Zero voltage switching;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Optimization of Electrical and Electronic Equipment (OPTIM), 2012 13th International Conference on
Conference_Location :
Brasov
ISSN :
1842-0133
Print_ISBN :
978-1-4673-1650-7
Electronic_ISBN :
1842-0133
Type :
conf
DOI :
10.1109/OPTIM.2012.6231845
Filename :
6231845
Link To Document :
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