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An Integrated Four-Port DC/DC Converter for Renewable Energy Applications

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3 Author(s)
Zhijun Qian ; Univ. of Central Florida, Orlando, FL, USA ; Abdel-Rahman, O. ; Batarseh, I.

This paper proposes a novel converter topology that interfaces four power ports: two sources, one bidirectional storage port, and one isolated load port. The proposed four-port dc/dc converter is derived by simply adding two switches and two diodes to the traditional half-bridge topology. Zero-voltage switching is realized for all four main switches. Three of the four ports can be tightly regulated by adjusting their independent duty-cycle values, while the fourth port is left unregulated to maintain the power balance for the system. Circuit analysis and design considerations are presented; the dynamic modeling and close-loop design guidance are given as well. Experimental results verify the proposed topology and confirm its ability to achieve tight independent control over three power-processing paths. This topology promises significant savings in component count and losses for renewable energy power-harvesting systems.

Published in:

Power Electronics, IEEE Transactions on  (Volume:25 ,  Issue: 7 )

Date of Publication:

July 2010

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