DocumentCode :
2282211
Title :
Current sharing in three-phase LLC interleaved resonant converter
Author :
Orietti, Enrico ; Mattavelli, Paolo ; Spiazzi, Giorgio ; Adragna, Claudio ; Gattavari, Giuseppe
Author_Institution :
DEI, Univ. of Padova, Padova, Italy
fYear :
2009
fDate :
20-24 Sept. 2009
Firstpage :
1145
Lastpage :
1152
Abstract :
In this paper, a novel approach for multi-phase interleaved LLC resonant converter is presented. The proposed solution, based on the use of three LLC modules with star connection of transformer primary windings, allows a drastic reduction of the output current ripple and consequently of the output filter capacitor size. Differently from other multi-phase solutions, that are greatly susceptible to resonant components´ tolerance causing current imbalance, the proposed topology exhibits an inherent current sharing capability. Moreover, a closed-loop phase-shift control is introduced to additionally compensate for current mismatch and completely balance the current supplied by each module. The benefit of such solution on the reduction of output current ripple and the phase-shift control interaction and effect on load-step variations are also investigated. Measurements on a prototype are added to simulations as validation of the assertions and proposals.
Keywords :
closed loop systems; phase control; resonant power convertors; LLC modules; closed-loop phase-shift control; current sharing; load-step variations; three-phase LLC interleaved resonant converter; transformer primary windings;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-2893-9
Electronic_ISBN :
978-1-4244-2893-9
Type :
conf
DOI :
10.1109/ECCE.2009.5316510
Filename :
5316510
Link To Document :
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