Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE
Conference_Location :
Fort Worth, TX
Print_ISBN :
978-1-4244-8084-5
DOI :
10.1109/APEC.2011.5744569
