Unified design for ZVT PWM converters with resonant auxiliary circuit

Operation modes of zero-voltage transition (ZVT) PWM converters with resonant auxiliary circuit (RAC) are identified and analysed by means of a common topology. A novel state-plane approach is used to determine the soft-switching boundary for this sort of converter. A unified design criterion, based on the analytical definition of the soft-switching boundary, is described in detail. By means of the proposed criterion the time spent on repetitive numerical simulation of a given topology to define its design guidelines based on a set of particular features can be significantly reduced. The theoretical analysis is confirmed by means of experimental results obtained from ZVT-PWM boost converters, which operate at 1 kW, 100 kHz.

[1]  Fred C. Lee,et al.  Resonant Power Processors, Part I---State Plane Analysis , 1985, IEEE Transactions on Industry Applications.

[2]  G. Joos,et al.  A novel zero-voltage switched PWM boost converter , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[3]  W. Baumann,et al.  Nonlinear modelling of the PWM switch , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[4]  Philip T. Krein,et al.  Elements of Power Electronics , 1997 .

[5]  K. M. Smith,et al.  A comparison of voltage-mode soft-switching methods for PWM converters , 1997 .

[6]  Chern-Lin Chen,et al.  Novel ZVT-PWM converters with active snubbers , 1998 .

[7]  Fred C. Lee,et al.  Soft-switching techniques in PWM converters , 1995, IEEE Trans. Ind. Electron..