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Title: Soft-switching current-fed power converters for low voltage high current applications
Keywords: Soft-switching, Current-fed, Power converters, Low voltage high current, Fuel Cell Vehicles
Issue Date: 15-Aug-2014
Citation: PAN XUEWEI (2014-08-15). Soft-switching current-fed power converters for low voltage high current applications. ScholarBank@NUS Repository.
Abstract: Electric transportation offers merits of zero emission, reduced noise, better efficiency, and high performance. Fuel cell vehicles (FCVs) have merits of satisfied driving range, short refueling time, and high reliability over Battery electric vehicles (BEVs). Power electronics plays an important role interfacing fuel cell stack, traction inverter, and energy storage. The main objective of this thesis is to develop high density, high performance, and modular soft-switching current-fed power converters for FCVs. This thesis first analyzes various propulsion system architectures for FCVs. The main focus of the thesis is on the front-end DC/DC converter interfacing the fuel cell stack and high voltage dc bus, and bidirectional DC/DC converter connecting the energy storage system (ESS) and high voltage dc bus connecting traction inverter. Soft-switching unidirectional and naturally clamped snubberless bidirectional DC/DC converters with innovative modulation techniques are proposed, developed, and experimentally demonstrated. Various topologies and design of snubberless naturally clamped soft-switching current-fed converters are presented.
Appears in Collections:Ph.D Theses (Open)

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