A Single-Ended Boost-Type High-Power-Factor Converter Using a Two-Input-Winding Transformer

Akira TAKEUCHI  Satoshi OHTSU  Seiichi MUROYAMA  

IEICE TRANSACTIONS on Communications   Vol.E80-B   No.3   pp.483-490
Publication Date: 1997/03/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Power Supply
high power factor,  two-input-winding transformer,  single-ended boost-type converter,  flyback converter,  

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The designed converter has a two-input-winding transformer powered by single-phase AC voltage and an energy storage capacitor. Small size and enhanced conversion efficiency are achieved, because more than half of the energy is supplied to the load via a single conversion stage, and fast output-voltage regulation is achieved by controlling the charging and discharging of the storage capacitor. The design and control methods for the converter take into account the reset conditions of the transformer and stability in the output voltage control. An almost unity power factor and a low output voltage ripple were achieved with this converter fabricated as a breadboard circuit using small capacitors.