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

fYear

2011

fDate

May 30 2011-June 3 2011

Firstpage

52

Lastpage

59

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Conference_Location

Jeju

ISSN

2150-6078

Print_ISBN

978-1-61284-958-4

Electronic_ISBN

2150-6078

Type

conf

DOI

10.1109/ICPE.2011.5944542

Filename

5944542