Analysis and design of a new constant frequency control for QRC and MRC based on magnetic elements modification

Multiresonant power converters (MRCs) and quasi-resonant power converters (QRCs) have been modified to provide constant-frequency operation. Transformer leakage inductance has been used to adapt the traditional pulse-width-modulation (PWM) control to these converters. Conventional PWM integrated circuits can be used for the power converter regulation. Several experimental results are developed to test the control method proposed.

[1]  A.M. Pernia,et al.  1D/2D transformer electric model for simulation in power converters , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[2]  J. Uceda,et al.  Dynamic modeling of the parallel resonant converter , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[3]  J. Alonso,et al.  A complete transformer electric model, including frequency and geometry effects , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[4]  K.W.E. Cheng,et al.  A class of fully soft-switched power factor correction circuits , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[5]  V. A. Niemela,et al.  Characterizing high-frequency effects in transformer windings-a guide to several significant articles , 1989, Proceedings, Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[6]  J. A. Collins.  An accurate method for modeling transformer winding capacitances , 1990, [Proceedings] IECON '90: 16th Annual Conference of IEEE Industrial Electronics Society.

[7]  T. Ninomiya,et al.  A unified analysis of resonant converters , 1991 .

[8]  R.D. Middlebrook,et al.  A unified analysis of converters with resonant switches , 1987, IEEE Power Electronics Specialists Conference.

[9]  Phoivos D. Ziogas,et al.  A novel approach for minimizing high-frequency transformer copper losses , 1988 .

[10]  Fred C. Lee,et al.  Novel zero-voltage-transition PWM converters , 1992 .

[11]  Ivo Barbi,et al.  Buck quasi-resonant converter operating at constant frequency: analysis, design and experimentation , 1989 .

[12]  K. Harada,et al.  Switched snubber for high frequency switching , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[13]  F.C. Lee,et al.  DC analysis and design of forward multi-resonant converter , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[14]  Abraham Dauhajre,et al.  Modelling and estimation of leakage phenomena in magnetic circuits , 1986, 1986 17th Annual IEEE Power Electronics Specialists Conference.

[15]  S.-A. El-Hamamsy,et al.  Magnetics modeling for computer-aided design of power electronics circuits , 1989, 20th Annual IEEE Power Electronics Specialists Conference.