Title :
A novel single-stage off-line converter with PFC, fast output voltage regulation and reduced switching frequency range
Author :
O´Sullivan, D.L. ; Egan, M.G. ; Willers, M.J.
Author_Institution :
PEI Technol., Univ. Coll. Cork, Ireland
Abstract :
A single-stage LC resonant AC/DC converter with fast output voltage regulation and PFC is described. Variable switching frequency control is used to regulate the output voltage. A new control method is introduced whereby the duty cycle is varied to regulate the output voltage at lighter loads. This enables a drastic reduction in the switching frequency range. Experimental results from a 5 V, 20 A prototype are presented
Keywords :
AC-DC power convertors; frequency control; power factor correction; resonant power convertors; switching circuits; voltage control; 20 A; 5 V; LC resonant AC/DC converter; duty cycle control; fast output voltage regulation; output voltage regulation; reduced switching frequency range; single-stage off-line converter; switching frequency range; variable switching frequency control;
Conference_Titel :
Power Electronics and Variable Speed Drives, 2000. Eighth International Conference on (IEE Conf. Publ. No. 475)
Conference_Location :
London
Print_ISBN :
0-85296-729-2
DOI :
10.1049/cp:20000260
