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This paper presents analysis and design of a zero-voltage switching (ZVS) current-fed three-phase isolated dc/dc converter. It is suitable for interfacing a low voltage dc source (non-conventional energy sources like PV, fuel cells) and a high voltage dc bus in an inverter and presents high efficiency. The analysis is presented for two operating modes, appearing owing to a change in source voltage...
A new modulation technique for soft-switching active-clamped current-fed full-bridge isolated dc/dc converter is propsoed. Hybrid soft-switching of semiconductor devices, i.e. zero current switching (ZCS) of top switches and zero voltage switching (ZVS) of bottom switches of full-bridge (H-bridge) as well as auxiliary switch is achieved. Active-clamp circuit absorbs the turn-off voltage spike limiting...
Three-phase current-fed dc/dc converter with active-clamp is analyzed with magnetizing inductance effect employing a novel simple modulation technique. Magnetizing current extends soft-switching range of power semiconductor devices. The topology is suitable for high current applications. Steady-state analysis and design of converter has been presented. Active-clamp circuit limits the bridge switch...
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