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Three-Phase (LC)(L)-Type Series-Resonant Converter With Capacitive Output Filter

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2 Author(s)
Almardy, M.S. ; Dept. of Electr. & Comput. En gineering, Univ. of Victoria, Victoria, BC, Canada ; Bhat, A.K.S.

This paper presents a three-phase (LC)(L)-type dc-dc series-resonant converter with capacitive output filter. Operation of the converter has been presented using the operating waveforms and equivalent-circuit diagrams during different intervals. An approximate analysis is used, and design procedure is presented with a design example. Intusoft simulation results for the designed converter are given for input voltage and load variations. Experimental results obtained with a 300-W converter are presented. Major advantages of this converter are the leakage and magnetizing inductances of the high-frequency transformer that are used as a part of resonant circuit, and the output-rectifier voltage is clamped to the output voltage. Also, the converter operates in soft switching for the inverter switches with a narrow frequency control range and the tank current decreases with the load current.

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Power Electronics, IEEE Transactions on  (Volume:26 ,  Issue: 4 )