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Analysis and design of (LC)(LC)-type series-parallel resonant converter

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3 Author(s)
Bhat, A.K.S. ; Dept. of Electr. Eng., Victoria Univ., BC, Canada ; Biswas, A. ; Iyengar, B.S.R.

A series-parallel resonant converter employing (LC)(LC)-type tank circuit operating in lagging power factor (PF) mode is presented and analyzed using complex ac circuit analysis. Design curves are obtained and the converter is optimized under certain constraints. Detailed Space Integrated Control Experiment (SPICE) simulation results are presented to evaluate the performance of the designed converter under varying load conditions. Results obtained from an experimental converter are also presented. The results obtained from the theory, SPICE simulation, and the experimental converter are compared. The proposed converter has high efficiency from full load to very light load (<10%). Switching frequency variation required for a wide change in the load (near load open circuit to full load) is narrow compared with the series resonant converter (SRC)

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Aerospace and Electronic Systems, IEEE Transactions on  (Volume:31 ,  Issue: 3 )