Design considerations of a voltage-fed full bridge DC-DC converter with high voltage gain for fuel cell applications

Author

Averberg, Andreas ; Mertens, Axel

Author_Institution

Leibniz Univ. Hannover, Hannover

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

11

Abstract

Fuel cells in the kW range have a high output current and low output voltage. To connect them to the mains, a DC-DC converter with a high voltage gain and an inverter are needed. In this paper an investigation of the voltage-fed full bridge dc-dc converter with high voltage gain is presented. A detailed analysis of the different operating modes, the semiconductors´ current and voltage stress, the switching losses and the transformer stress is given. The influence of diverse parameters like winding ratio, leakage inductance and output inductance on the operating behaviour, hence voltage gain and efficiency is stated out. The analytical results are compared with measurements taken from a 1.2 kW prototype. Finally, design criteria for the dc-dc converter are given to realise a high voltage gain and high efficiency.

Keywords

DC-DC power convertors; fuel cells; switching; fuel cell applications; switching losses; transformer stress; voltage gain; voltage-fed full bridge DC-DC converter; Bridge circuits; DC-DC power converters; Fuel cells; Inductance; Rectifiers; Semiconductor diodes; Stress; Switched-mode power supply; Switching converters; Voltage; DC power supply; Design; Efficiency; Fuel cell system; High frequency power converter; Switched-mode power supply;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2007 European Conference on

Conference_Location

Aalborg

Print_ISBN

978-92-75815-10-8

Electronic_ISBN

978-92-75815-10-8

Type

conf

DOI

10.1109/EPE.2007.4417498

Filename

4417498