Title :
Digital implementation of load sharing method for interleaved LLC converters
Author :
Zhiyuan Hu ; Yajie Qiu ; Yan-Fei Liu
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´s Univ., Kingston, ON, Canada
Abstract :
LLC converter has been found advantageous in isolated DC-DC applications due to its high efficiency and low cost. However in high-power high-current applications, the high component stress and high conduction loss limit the maximum power capacity and reduce the efficiency. Interleaving technique can be employed to solve this problem, but the component tolerances of the resonant tanks will cause severe load sharing problem. This paper describes digital implementations of switch-controlled capacitor (SCC) modulated multiphase LLC converters (SCC-LLC) to achieve load sharing. A 600W two-phase interleaved SCC-LLC prototype is built to demonstrate the feasibility and advantages.
Keywords :
DC-DC power convertors; capacitors; switching convertors; SCC-LLC converters; SCC-modulated multiphase LLC converters; component stress; component tolerances; conduction loss; digital implementation; efficiency reduction; high-power high-current application; interleaved LLC converters; interleaving technique; isolated DC-DC applications; load sharing method; maximum power capacity; power 600 W; resonant tanks; switch-controlled capacitor; two-phase interleaved SCC-LLC prototype; Capacitance; Capacitors; Logic gates; MOSFET; Pulse width modulation; Switching frequency; Synchronization;
Conference_Titel :
Control and Modeling for Power Electronics (COMPEL), 2013 IEEE 14th Workshop on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
978-1-4673-4914-7
DOI :
10.1109/COMPEL.2013.6626420
