Title :
A new three-phase interleaved isolated boost converter with active clamp for fuel cells
Author :
Cha, Hanju ; Choi, Jungwan ; Han, Byung-Moon
Author_Institution :
Dept. of Electr. Eng., Chungnam Nat. Univ., Daejeon
Abstract :
In this paper, a new three-phase high power dc/dc converter with an 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 :
DC-DC power convertors; PWM power convertors; switching convertors; active clamp converter; conduction losses; fuel cells; power transfer; switching losses; three-phase PWM strategy; three-phase high power dc/dc converter; three-phase interleaved isolated boost converter; three-phase power configuration; three-phase transformer; Analytical models; Clamps; DC-DC power converters; Filters; Frequency conversion; Fuel cells; Phase transformers; Pulse width modulation; Pulse width modulation converters; Switching loss; continuous conduction mode; interleaved operation; isolated boost converter; three-phase PWM strategy; three-phase dc/dc converter;
Conference_Titel :
Power Electronics Specialists Conference, 2008. PESC 2008. IEEE
Conference_Location :
Rhodes
Print_ISBN :
978-1-4244-1667-7
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2008.4592106