Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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A New Control Scheme of Class-E Electronic Ballast with Low Crest Factor

  • Chon, Hyun-Son (Dept. of Electrical Engineering, Hanyang University) ;
  • Lee, Dong-Yun (Dept. of Electrical Engineering, Hanyang University) ;
  • Hyun, Dong-Seok (Dept. of Electrical Engineering, Hanyang University)
  • Published : 2003.07.01
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Abstract

In this paper, a new control scheme of Class-E inverter for reducing the crest factor of electronic ballasts for fluorescent lamps using Pulse-Frequency-Modulation (PFM) is Introduced The lifetime of the lamps is guaranteed by decreasing the lamp crest factor and also voltage stress of the switch is significantly decreased by a new scheme although conventional Class-E Inverter is used In this paper. The proposed PFM control scheme didn't use any auxiliary circuit. The proposed control strategy is executed by feeding back the Input voltage, and the zero-voltage-switching (ZVS) is ensured by maintaining constant turn-off time of the switch Therefore, the control principles of proposed method are explained in detail and its validity is verified through several simulations and experimental results.

Keywords

References

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