Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Single-Stage Half-Bridge Electronic Ballast Using a Single Coupled Inductor

  • Cho, Yong-Won (Dept. of Electronic and Electrical Eng., Pohang University of Science and Technology) ;
  • Kwon, Bong-Hwan (Dept. of Electronic and Electrical Eng., Pohang University of Science and Technology)
  • Received : 2011.09.16
  • Published : 2012.09.20
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Abstract

This paper proposes a single-stage half-bridge electronic ballast with a high power factor using only a single coupled inductor. Compared to conventional high power factor electronic ballasts, the proposed ballast is a simpler circuit with a low cost and a high reliability. The proposed ballast is made up of a power-factor-correction (PFC) circuit and a self-oscillating class-D inverter. The PFC and inverter stages of the proposed ballast are simplified by sharing only a single coupled inductor and two common switches. The proposed PFC circuit can achieve a high power factor and low voltage stresses of the switches. A saturable transformer in the self-oscillating class-D inverter determines the switching frequency of the ballast. Experimental results obtained on a 30W fluorescent lamp are discussed.

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References

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