Title :
A single-switch power-factor-corrected converter with reduced repeated power processing
Author :
Lu, Dylan D C ; Cheng, David K W ; Lee, Yim S.
Author_Institution :
Hong Kong Polytech. Univ., China
Abstract :
By adding an auxiliary winding in series with the input boost inductor of a discontinuous conduction mode (DCM) boost/flyback single-switch power-factor-corrected converter (SSPC), the storage capacitor voltage and its range of voltage fluctuation under line variations can be reduced while maintaining high power factor. Furthermore, the flyback transformer provides a direct energy transfer path to output to increase the conversion efficiency of the converter. It is also found that the power factor, the storage capacitor voltage and the conversion efficiency are controlled by the inductance ratio between the input boost inductor, the auxiliary winding and the output transformer. This paper presents a detailed analysis of the converter operating in DCM. Experimental results for a 15V/60W prototype with wide input voltage range (90-235Vrms) are given to confirm the theoretical analysis of the converter.
Keywords :
AC-DC power convertors; capacitor storage; power capacitors; power factor correction; power transformers; rectifying circuits; switching circuits; transformer windings; 15 V; 60 W; 90 to 235 V; auxiliary winding; conversion efficiency; direct energy transfer path; discontinuous conduction mode; flyback transformer; inductance ratio; input boost Inductor; input boost inductor; output transformer; repeated power processing reduction; single-switch power-factor-corrected converter; storage capacitor voltage; Capacitors; Costs; DC-DC power converters; Flyback transformers; Inductors; Power supplies; Reactive power; Stress; Switches; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 2001. Proceedings., 2001 4th IEEE International Conference on
Print_ISBN :
0-7803-7233-6
DOI :
10.1109/PEDS.2001.975278
