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Interleaved zero-voltage-switching active-clamped current-fed full-bridge isolated dc/dc converter for fuel cell applications: A case study analysis

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3 Author(s)
Dharmesh, P.D. ; Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore ; Rathore, A.K. ; Xiaodong Li

An interleaved soft-switching active-clamped current-fed full-bridge isolated dc/dc converter has been studied. Its steady-state operation and analysis for wide input voltage and varying power transfer capacity are discussed. Interleaving two full-bridge current-fed converters reduces the input current ripple. Phase-shift modulation with parallel input series output interleaving is adopted. The power density of the converter increases with small devices' ratings and less current/thermal stress on the semiconductor switches. The converter utilizes the energy stored in the transformer leakage and magnetizing inductance to maintain zero-voltage-switching over wide range of source voltage and load variation. It improves the converter efficiency and allows high switching frequency operation.

Published in:

Sustainable Energy Technologies (ICSET), 2012 IEEE Third International Conference on

Date of Conference:

24-27 Sept. 2012