Modeling and Simulation of High Efficient Symmetric Half-Bridge Converter (SHBC) for Server Switched Mode Power Supplies
Aneesha Jose1, P.Swaminathan2
1Aneesha Jose, Electrical and Electronics Engineering, Karunya University, Coimbatore, India.
2Prof. P. Swaminathan, Electrical and Electronics Engineering, Karunya University, Coimbatore, India.
Manuscript received on November 20, 2012. | Revised Manuscript received on December 11, 2012. | Manuscript published on December 30, 2012. | PP: 264-268 | Volume-2, Issue-2, December 2012.  | Retrieval Number: B0927112212 /2012©BEIESP

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Abstract: Asymmetric control scheme is an approach to achieve zero-voltage switching (ZVS) for half-bridge isolated dc–dc converters. But, it is not suited for wide range of input voltage due to the uneven voltage and current components stresses. Modeling and simulation of a new high-efficient symmetric half-bridge dc to dc converter is proposed in this paper. The proposed dc to dc converter regulates the output voltage by adjusting applied voltage on the main transformer with an auxiliary circuit while main switches are operated at both fixed duty ratio and switching frequency. So that, voltage stress on rectifier diodes and current stress on switches can be reduced.
Keywords: Symmetric Half-Bridge Converter (SHBC), Asymmetric Converter, Zero Voltage Switching (ZVS).