Title :
A modified control scheme to alleviate DC voltage stress in active clamp PFC AC/DC converter with universal input
Author :
Wu, Wenkai ; Qiu, Weihong ; Gu, Wei ; Batarseh, Issa
Author_Institution :
APECOR Co., Orlando, FL, USA
Abstract :
A modified control scheme is proposed to alleviate bulk capacitor voltage stress in active clamp bi-flyback power factor correction (PFC) AC/DC converter with universal input. In the proposed control scheme, the auxiliary switch is turned on with a fixed narrow pulse-width, rather than the conventional complimentary signal of the main switch. As a result, the proposed technique will substantially suppress the DC voltage well below 400 V under the entire input range. The improved performance was experimentally verified through a 28 V, 5.35 A prototype
Keywords :
AC-DC power convertors; electric current control; power factor correction; voltage control; 28 V; 5.35 A; DC voltage suppression; active clamp bi-flyback PFC AC/DC converter; bulk capacitor voltage stress alleviation; fixed narrow pulse-width; modified control scheme; power factor correction; universal input; Capacitors; Centralized control; Circuit topology; Clamps; DC-DC power converters; Flyback transformers; Low voltage; Stress control; Switches; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2002. APEC 2002. Seventeenth Annual IEEE
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-7404-5
DOI :
10.1109/APEC.2002.989288
