Title :
An AC-DC converter with low input distortion and near unity power factor
Author :
Willers, M.J. ; Egan, M.G. ; Murphy, J.M.D. ; Daly, S.
Author_Institution :
Dept. of Electr. Eng. & Microelectronics, Univ. Coll. Cork, Ireland
Abstract :
A single-stage flyback converter is operated as a single-phase AC-DC converter with active power factor correction. The input filter required to reduce the differential mode conducted emissions is examined, and modulation of the switching frequency is suggested as a means of minimising the filter requirements. Various modulation strategies are studied and a simple analogue circuit implementation is presented for the optimum strategy. The influence of component tolerances on harmonic distortion is also investigated
Keywords :
harmonics; power convertors; power factor correction; AC-DC converter; active power factor correction; analogue circuit implementation; component tolerances; differential mode conducted emissions; harmonic distortion; input filter; low input distortion; modulation strategies; near unity power factor; single-stage flyback converter;
Conference_Titel :
Power Electronics and Applications, 1993., Fifth European Conference on
Conference_Location :
Brighton
