Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Interleaved Boost-Flyback Converter with Boundary Conduction Mode for Power Factor Correction

  • Lin, Bor-Ren (Dept. of Electrical Eng., National Yunlin University of Science and Technology) ;
  • Chien, Chih-Cheng (Dept. of Electrical Eng., National Yunlin University of Science and Technology)
  • Received : 2011.01.07
  • Published : 2012.09.20
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Abstract

This paper presents a new interleaved pulse-width modulation (PWM) boost-flyback converter to achieve power factor correction (PFC) and regulate DC bus voltage. The adopted boost-flyback converter has a high voltage conversion ratio to overcome the limit of conventional boost or buck-boost converter with narrow turn-off period. The proposed converter has wide turn-off period compared with a conventional boost converter. Thus, the higher output voltage can be achieved in the proposed converter. The interleaved PWM can further reduce the input and output ripple currents such that the sizes of inductor and capacitor are reduced. Since boundary conduction mode (BCM) is adopted to achieve power factor correction, power switches are turned on at zero current switching (ZCS) and switching losses are reduced. The circuit configuration, principle operation, system analysis, and design consideration of the proposed converter are presented in detail. Finally, experiments conducted on a laboratory prototype rated at 500W were presented to verify the effectiveness of the converter.

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