Hybrid Full-Bridge Three-Level LLC Resonant Converter- A Novel DC-DC Converter Suitable for Fuel Cell Power System

Author

Jin, Ke ; Ruan, Xinbo

Author_Institution

Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut.

fYear

2005

fDate

16-16 June 2005

Firstpage

361

Lastpage

367

Abstract

This paper proposes a novel hybrid full-bridge three-level LLC resonant converter. It integrates the advantages of the hybrid full-bridge three-level converter and the LLC resonant converter. It can operate not only under three-level mode but also under two-level mode, so it is very suitable for wide input voltage range application, such as fuel cell power system. The input current ripple and output filter can also be reduced. Three-level leg switches just sustain only half of the input voltage. ZCS is achieved for the rectifier diodes, and the voltage stress across the rectifier diodes can be minimized to the output voltage. The main switches can realize ZVS from zero to full load. A 200-400 V input, 360 V/4 A output prototype converter is built in our lab to verify the operation principle of the proposed converter

Keywords

DC-DC power convertors; bridge circuits; fuel cell power plants; resonant power convertors; switching convertors; zero current switching; zero voltage switching; 200 to 360 V; 4 A; DC-DC converter; ZCS; ZVS; fuel cell power system; full-bridge three-level LLC resonant converter; hybrid full-bridge three-level converter; input current ripple; output filter; rectifier diodes; voltage stress; DC-DC power converters; Diodes; Filters; Fuel cells; Hybrid power systems; Leg; Rectifiers; Resonance; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581649

Filename

1581649