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Three-Phase Interleaved Isolated High Efficiency Boost Converter  

Choi, Jung-Wan (국가핵융합연구소)
Cha, Han-Ju (충남대 전기정보통신공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.14, no.6, 2009 , pp. 496-503 More about this Journal
Abstract
In this paper, a new three-phase interleaved isolated high efficiency boost dc-dc converter with active clamp is proposed. The converter is capable of increased power transfer due to its three-phase power configuration, and it reduces the rms current per phase, thus reducing conduction losses. Further, interleaved operation of three-phase boost converter reduces overall ripple current, which is imposed into fuel cells and realizes smaller sized filter components, increasing effective operating frequency and leading to higher power density. Each output current of three-phase boost converter is combined by the three-phase transformer and flows in the continuous conduction mode by the proposed three-phase PWM strategy. An efficiency of above 96% is mainly achieved by reducing conduction losses and switching losses are reduced by the action of active clamp branches, as well. The proposed converter and three-phase PWM strategy are analyzed, simulated and implemented in hardware. Experimental results are obtained on a 500 W prototype unit, with all of the design verified and analyzed.
Keywords
3-phase dc-dc converter; Isolated boost converter; Interleaved; Continuous current conduction;
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