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Steady-state analysis of the constant-frequency clamped series resonant converter

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3 Author(s)
Glaser, J.S. ; Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA ; Witulski, A.F. ; Myers, R.G.

A constant-frequency diode-clamped series resonant converter (CFCSRC) is proposed as a solution to problems associated with frequency-controlled resonant converters. This converter has two resonant frequencies, and control is achieved by varying the relative time spent at each switching frequency. Two zero-current-switching (ZCS) modes are examined and plotted in the output plane. An equation is given for the boundary between the two ZCS modes, as well as an expression for the boundary between ZCS and non-ZCS operation; both are plotted in the output plane. The output equation for the main mode is shown to be hyperbolic. Converter peak voltages limited to the input voltages, and peak currents are less than those of the frequency-controlled clamped series resonant converter over a large operating range. Data from a prototype converter are compared with theoretical data and are shown to be in good agreement with the theoretical model

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:30 ,  Issue: 1 )