Overcurrent protection for the LLC resonant converter with improved hold-up time

Author

Figge, H. ; Grote, T. ; Fröhleke, N. ; Böcker, J. ; Schafmeister, F.

Author_Institution

Power Electron. & Electr. Drives, Univ. of Paderborn, Paderborn, Germany

fYear

2011

fDate

6-11 March 2011

Firstpage

13

Lastpage

20

Abstract

The LLC resonant converter topology enables high DC-DC conversion efficiency and has been recently adopted for power supplies in several application areas. In this paper a method for overcurrent protection of the LLC resonant converter is proposed, which avoids a reduction of the hold-up time resulting from the application of the protection scheme. The discussion covers the operation principle, design aspects and a detailed analysis of the circuit operation. Finally measurements on a prototype are presented showing an improvement in the hold-up time of up to 83%.

Keywords

DC-DC power convertors; overcurrent protection; resonant power convertors; DC-DC conversion efficiency; LLC resonant converter topology; circuit operation; hold-up time; overcurrent protection; power supply; Bridge circuits; Capacitors; Clamps; Converters; Impedance; RLC circuits; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE

Conference_Location

Fort Worth, TX

ISSN

1048-2334

Print_ISBN

978-1-4244-8084-5

Type

conf

DOI

10.1109/APEC.2011.5744569

Filename

5744569