Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

A New High Efficiency Half Bridge Converter with Improved ZVS Performance

  • Lee Sung-Sae (Dept. of Electrical Engineering and Computer Science, KAIST) ;
  • Han Sang-Kyoo (School of Electrical Engineering, Kookmin University) ;
  • Moon Gun-Woo (Dept. of Electrical Engineering and Computer Science, KAIST)
  • Published : 2006.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

A new asymmetrical pulse width modulation (PWM) half bridge converter with improved ZVS performance is proposed. The ZVS operation of the proposed converter can be maintained from no load to full load conditions since the magnetizing current of the transformer contributes to the ZVS operation at light loads without considerable conduction loss of the transformer and switch. Synchronous rectification is employed to reduce the rectification loss. Operational principles, large signal modeling, ZVS analysis and design equations are presented. Experimental results demonstrate that the proposed converter can achieve a large ZVS range and significant improvement in efficiency for a 100W (5V, 20A) prototype converter.

Keywords

References

  1. Robert Watson, Fred C. Lee, Guichao C. Hua, 'Utilization of an Active-Clamp Circuit to Achieve Soft Switching in Flyback Converters', IEEE Trans. on Power Electronics, Vol. 11, No. 1, 1996, pp. 162-169 https://doi.org/10.1109/63.484429
  2. G. C. Hua, W. A. Tabisz, C. S. Leu, N. Dai, R. Watson, F.C. Lee, 'Development of a DC Distributed Power System', in Proc. IEEE APEC, 1994, pp. 763-769
  3. P. Imbertson, N. Mohan, 'Asymmetrical Duty Cycle Permits Zero Switching Loss in PWM Circuits with No Conduction Loss Penalty', IEEE Trans. Industry Applications, Vol. 29, No. 1, 1993, pp. 121-125 https://doi.org/10.1109/28.195897
  4. S. Korotkov, V. Meleshin, R. Miftahutdinov, s. Fraidlin, ' Soft-Switched Asymmetrical half-Bridge DC/DC Converter: Steady-Stage Analysis: An Analysis of Switching Processes', TELESCON, 1997, pp. 177-184
  5. R. Oruganti, P. C. Heng, J. T. K. Guan, L. A. Choy, 'Soft-Switched DC/DC converter with PWM Control', IEEE Trans. Power Electronics, Vol. 13, No. 1, 1998, pp. 102-114 https://doi.org/10.1109/63.654964
  6. W. Chen, P. Xu, Fred C. Lee, 'The Optimization of Asymmetrical half Bridge Converter', Applied Power Electronics Conference and Exposition, 2001, pp. 703-707
  7. J. Feng, Y. Hu, W. Chen, C. Wen, 'ZVS Analysis of Asymmetrical Half-Bridged Converter', Power Electronics Specialists Conference, IEEE PESC, 2001, pp. 243-247
  8. T. M. Chen, C. L. Chen, 'Analysis and Design of Asymmetrical Half Bridge Flyback Converter', Electric Power Applications, IEE Proc., Vol. 149, 2002, pp. 433-440