The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Single-Power-Conversion Series-Resonant AC-DC Converter with High Efficiency

고효율을 갖는 단일 전력변환 직렬 공진형 AC-DC 컨버터

  • Jeong, Seo-Gwang (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology) ;
  • Cha, Woo-Jun (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology) ;
  • Lee, Sung-Ho (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology) ;
  • Kwon, Bong-Hwan (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology)
  • Received : 2015.11.16
  • Accepted : 2016.03.28
  • Published : 2016.06.20
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Abstract

In this study, a single-power-conversion series-resonant ac-dc converter with high efficiency and high power factor is proposed. The proposed ac-dc converter consists of single-ended primary-inductor converter with an active-clamp circuit and a voltage doubler with series-resonant circuit. The active-clamp circuit clamps the surge voltage and provides zero-voltage switching of the main switch. The series-resonant circuit consists of leakage inductance $L_{lk}$ of the transformer and resonant capacitors $ C_{r1}$ and $ C_{r2}$. This circuit also provides zero-current switching of output diodes $D_1$ and $D_2$. Thus, the switching loss of switches and reverse-recovery loss of output diodes are considerably reduced. The proposed ac-dc converter also achieves high power factor using the proposed control algorithm without the addition of a power factor correction circuit and a dc-link electrolytic capacitor. A detailed theoretical analysis and the experimental results for a 1kW prototype are discussed.

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References

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