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Flyback-forward power factor correction circuit with line-frequency ripple suppression

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3 Author(s)
Liang, T.J. ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Ai, T.-H. ; Chen, J.F.

A flyback-forward converter with power factor correction and line ripple suppression is proposed. The topology combines forward and flyback circuits with a post regulator. To maintain a high power factor, the flyback circuit delivers the major output power, while the output voltage is controlled by the post regulator with fast response to suppress line-frequency ripple without the use of a high voltage bulk capacitor or current sensor on the primary side. The circuit features high power factor and low output line-frequency ripple in discontinuous conduction mode. A theoretical analysis and experimental results are presented.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:149 ,  Issue: 6 )