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Small-signal and transient analysis of a zero-voltage-switched, phase-controlled PWM converter using averaged switch model

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1 Author(s)
Tsai, F.-S. ; Digital Equipment Corp., Maynard, MA, USA

An averaged switch model for a popular zero-voltage-switched (ZVS), phase-controlled PWM (PC-PWM) converter is developed. The model can be easily implemented in a circuit analysis program such as PSPICE to derive small-signal characteristics as well as predict large-signal transient behaviors of the converter in both continuous and discontinuous conduction modes. Using the averaged approach, the required computer time is greatly reduced. Such a model is vitally important for studying behavior of large systems such as parallel modules. A PSPICE subcircuit implementing the zero-voltage-switching PWM function is introduced. Simulation results illustrating both small and large-signal behaviors of the converter are presented

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Industry Applications, IEEE Transactions on  (Volume:29 ,  Issue: 3 )