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

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

A Study on PFC Buck-Boost AC-DC Converter of Soft Switching

소프트 스위칭형 PFC 벅-부스트 AC-DC 컨버터에 관한 연구

  • 곽동걸 (강원대 방재기술전문대학원)
  • Published : 2007.12.20
Download PDF
⟨ Previous Next ⟩

Abstract

The system efficiency of the proposed Buck-Boost AC-DC converter is increased by soft switching method. The converter includes to merit of power factor correction (PFC) from sinusoidal control of input current. The switching behavior of control switches operates with soft switching by partial resonance, and then the proposed converter has high system efficiency with decrement of switching power loss. The input current waveform in proposed converter is got to be a sinusoidal form of discontinuous quasi-pulse row in proportion to magnitude of AC input voltage under the constant duty cycle switching. Therefore, the input power factor is nearly unity. The output voltage of the converter is regulated by PWM control technique. The discontinuous mode action of current flowing into inductor makes to simplify control method and control components. The proposed PFC Buck-Boost converter is analyzed to compare with the conventional PFC Buck-Boost converter. Some computer simulative results and experimental results confirm to the validity of the analytical results.

본 논문에서는 새로운 소프트 스위칭형 PFC 벅-부스트 AC-DC 컨버터에 대해 연구된다. 제안된 컨버터에 사용된 제어스위치의 턴-온과 턴-오프는 부분공진 동작에 의해 소프트 스위칭으로 되어 스위칭 손실을 줄이고, 입력전류는 듀티율 일정제어에 의한 교류 입력전압의 크기에 비례된 불연속적 유사 펄스열의 정현파 형태를 가진다. 그 결과 컨버터는 효율이 증대되고 입력역률이 증대되는 효과를 가진다. 또한 제안된 컨버터의 출력전압은 제어스위치의 PWM 제어에 의해 조정되고 벅-부스트용 인덕터에 흐르는 전류는 불연속모드로 제어되어 제어회로와 제어기법이 간단한 장점이 주어진다. 제안된 PFC 벅-부스트 컨버터는 기존의 PFC 벅-부스트 컨버터와 비교되어 해석되고 컴퓨터 시뮬레이션과 실험을 통해 그 해석적 타당성이 입증된다.

Keywords

References

  1. O. Garcia, J. A. Cobos, R. Prieto, P. Alou, and J. Uceda, 'Single phase power factor correction: A survey', IEEE Trans. on PE, Vol. 18, No.3, pp. 749-755, 2003
  2. Q. Zhao, M. Xu, F. C. Lee, and J. Qian, 'Single-Switch Parallel Power Factor Correction AC-DC Converters with Inherent Load Current Feedback', IEEE Trans. on PE, Vol. 19, No.4, pp. 928-936, 2004
  3. W. Guo, and P. K. Jain, 'A Low Frequency AC to High Frequency AC Inverter with Build-In Power Factor Correction and Soft-Switching', IEEE Trans. on PE, Vol. 19, No.2, pp. 430-442, 2004
  4. Y. Jang, M. Jovanovic, and D. L. Dillman, 'Soft-Switched PFC Boost Rectifier With Integrated ZVS Two-Switch Forward Converter', IEEE Trans. on PE, Vol. 21, No.6, pp. 1600-1606, 2006
  5. K. Nishimura, K. Hirachi, E. Hiraki, N. A. Ahmed, H. W. Lee, and M. Nakaoka, 'Advanced Three-Phase PFC Power Converter with Three-Phase Diode Rectifier and Four-Switch Boost Chopper', Journal of Power Electronics, Vol. 6, No.4, pp. 356-365, 2006
  6. D. K. Kwak, C. S. Kim, J. S. Shim, C. S. Kim, and H. W. Lee, 'A Novel Step-up AC-DC Converter with PFC by Discontinuous Current Control', Journal of KlPE, Vol. 11, No.2, pp. 142-148, 2006
  7. D. Sadarnac, W. Abida, 'The double discontinuous mode operation of a converter: A method for soft switching ', IEEE Trans. on PE, Vol. 19, No.2, pp. 453-460, 2004
  8. K. S. Leung, and S. H. Chung, 'A comparative study of boundary control with first and second-order switching surfaces for buck converters operating in DCM', IEEE Trans. on PE, Vol 22, No.4, pp. 1196-1209, 2007
  9. D. K. Kwak, 'A Study on Buck-Boost DC-DC Converter of Soft Switching', Journal of KlPE, Vol. 12, No. 5, pp. 394-399, 2007