Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

A New High Efficiency PWM Single-Switch Isolated Converter

  • Park, Ki-Bum (Department of Electrical Engineering and Computer Science, KAIST) ;
  • Kim, Chong-Eun (Department of Electrical Engineering and Computer Science, KAIST) ;
  • Moon, Gun-Woo (Department of Electrical Engineering and Computer Science, KAIST) ;
  • Youn, Myung-Joong (Department of Electrical Engineering and Computer Science, KAIST)
  • Published : 2007.10.20
Download PDF
⟨ Previous Next ⟩

Abstract

The flyback converter is one of the most attractive isolated converters in small power applications because of its simple structure. However, it suffers from high device stress, large transformer size, and high voltage stress across its switch and diode. To solve these problems a new cost-effective PWM single-switch isolated converter is proposed. The proposed converter has no output filter inductor, reduced voltage stress on the secondary devices, and reduced transformer size. Moreover, the switch turn-off loss is reduced and no dissipative snubber across the secondary diode is required. Therefore, it features a simple structure, a low cost, and high efficiency. The operational principle and characteristics of the proposed converter are presented and compared with the flyback converter and then verified experimentally.

Keywords

References

  1. J. A. Sabate, V. Vlatkovic, R. B. Ridley, F. C. Lee, and B. H. Cho, 'Design consideration for high-voltage high-power full-bridge zero-voltage-switched PWM converter,' in Proc. IEEE APEC, 1990, pp. 275-284
  2. Paul Imbertson and Ned Mohan, 'Asymmetrical duty cycle permits zero switching loss in PWM circuits with no conduction loss penalty,' IEEE Trans. Industry Application, Vol. 29, No. 1, 1993, pp. 121-125 https://doi.org/10.1109/28.195897
  3. A. Acik and I. Cadirci, 'Active clamped ZVS forward converter with soft-switched synchronous rectifier for high efficiency, low output voltage applications,' IEE Proc. Electric Power Application, Vol. 150, No. 2, 2003, pp. 165-174
  4. M. T. Zhang, M. M. Javanovic, and F. C. Lee, 'Design considerations and performance evaluations of synchronous rectification in flyback converters,' IEEE Trans. Power Electronics, Vol. 13, No. 3, 1998, pp. 538-546 https://doi.org/10.1109/63.668117
  5. T. H. Chen, W. L. Lin, and C. M. Liaw, 'Dynamic modeling and controller design of flyback converter,' IEEE trans. Aerospace and Electronic System, Vol. 35, No. 4, 1999, pp. 1230-1239 https://doi.org/10.1109/7.805441
  6. A. I. Pressman, Switching Power Supply Design. New York: McGraw-Hill, 1991
  7. Xiangiun Zhang, Hankui Liu, and Dianguo Xu, ' Analysis and design of the flyback transformer,' in Proc. IEEE IECON, 2003, pp. 715-719
  8. Hang-Seok Choi, 'Application note AN4137 - Design guide lines for off-line flyback converters using fairchild power switch (FPS),' Fairchild Semiconductor Corporation, 2003