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

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.

[1]  M. J. Willers,et al.  A BIFRED converter with a wide load range , 1994, Proceedings of IECON'94 - 20th Annual Conference of IEEE Industrial Electronics.

[2]  S. Singer,et al.  Design of a simple high-power-factor rectifier based on the flyback converter , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[3]  M.M. Hernando,et al.  Average current mode control of two-input buck post-regulators used in power factor correctors , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[4]  Esam H. Ismail,et al.  Integrated high-quality rectifier-regulators , 1999, IEEE Trans. Ind. Electron..

[5]  Javier Sebastian,et al.  High-efficiency and wide-bandwidth performance obtainable from a two-input buck converter , 1998 .

[6]  Javier Sebastian,et al.  Improving dynamic response of power factor preregulators by using two-input high-efficient post-regulators , 1996 .

[7]  H. E. Tacca,et al.  Single-switch two-output flyback-forward converter operation , 1998 .

[8]  M. Nagao.  A novel one-stage forward-type power-factor-correction circuit , 2000 .

[9]  Jaime Arau,et al.  An integrated battery charger/discharger with power-factor correction , 1997, IEEE Trans. Ind. Electron..

[10]  Fernando Nuño García,et al.  Average-current-mode control of two-input buck postregulators used in power-factor correctors , 1999, IEEE Trans. Ind. Electron..

[11]  H. E. Tacca,et al.  Power factor correction using merged flyback-forward converters , 2000 .

[12]  Simone Buso,et al.  Power factor preregulators based on combined buck-flyback topologies , 2000 .