Title :
Three-level LLC SRC for high and wide input voltage applications
Author :
Lee, Il-Oun ; Moon, Gun-Woo
Author_Institution :
Dept. of Electr. Eng., KAIST, Daegeon, South Korea
fDate :
May 30 2011-June 3 2011
Abstract :
A new three-level LLC series-resonant-converter (TL LLC SRC) for high and wide input voltage applications is proposed. It consists of two half bridge LLC SRCs in series, sharing a resonant inductor and a transformer. The main advantages of the proposed converter are that the voltages across all switches clamp to half of the input voltage and keep the balance. Thus, it is suitable for high input voltage applications. Moreover, due to its simple driving signals, the additional circulating current of the conventional TL LLC SRCs does not appear in the converter, and driving circuitry can be designed to be simpler. The validity of this study is confirmed by the experimental results of a prototype converter with 400-600V input, 48V/20A output.
Keywords :
power transformers; resonant power convertors; TL LLC SRC; current 20 A; driving circuitry; half-bridge LLC SRC; high-input voltage application; resonant inductor; series resonant converter; three-level LLC SRC; transformer; voltage 400 V to 600 V; voltage 48 V; wide-input voltage application; Capacitors; Clamps; Equivalent circuits; Switches; Switching frequency; Voltage control; Zero voltage switching; High and wide input voltage; LLC SRC; three-level;
Conference_Titel :
Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on
Conference_Location :
Jeju
Print_ISBN :
978-1-61284-958-4
Electronic_ISBN :
2150-6078
DOI :
10.1109/ICPE.2011.5944542
