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Small signal analysis and closed loop control design of active-clamped zero-voltage switched two inductor current-fed isolated DC-DC converter

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4 Author(s)
A. K. Rathore ; Dept. of Electr. Eng., Univ. of Wuppertal, Wuppertal, Germany ; A. K. S. Bhat ; S. Nandi ; R. Oruganti

This study presents detailed small signal analysis and a closed loop control design of zero-voltage switched two inductor active-clamped current-fed isolated DC-DC converter. State-space averaging technique is used to derive the small signal model. A two-loop average current controller is designed for fixed frequency duty cycle modulation and works for wide input voltage and load variation. A complete design procedure is presented. A simple analogue controller is implemented. Experimental results for step-change in load are presented at different input voltage conditions.

Published in:

IET Power Electronics  (Volume:4 ,  Issue: 1 )