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Improving dynamic response of power-factor preregulators by using two-input high-efficient postregulators

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5 Author(s)
Sebastian, J. ; Dept. de Ingenieria Electrica, Electron., de Computadores y Sistemas, Oviedo Univ., Spain ; Villegas, P.J. ; Nuno, F. ; Garcia, O.
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A new method to improve the dynamic response of power-factor preregulators (PFPs) is developed in this paper. The method is based on the use of a very high efficient postregulator with two inputs instead of only one. This two-input postregulator exhibits very high efficiency due to the fact that only a part of the total power undergoes a power conversion process. Such postregulators need two-output PFPs at their inputs, which can be easily obtained in PFPs with transformers or with two PFPs working in parallel

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Power Electronics, IEEE Transactions on  (Volume:12 ,  Issue: 6 )