1,721,015 research outputs found
Durability Aspects in the Power Flow Management of A Fuel Cell Supplied Light Rail Transit System
No full textA model of the supply-traction drive system related to a light rail fuel-cell based vehicle allows to investigate the influence of the components rating and of the control parameters on the supply system performances and, in particular, on some aspects involved in the durability of the lead-acid batteries and in the overall efficiency. A parametric analysis allows assessing such quantities as functions of the
design parameters. Moreover, the supply system performance is optimized by a minimization algorithm applied to an objective function, depending on the values
related to these performance aspects
Optimization of Power Flow Management in a Fuel-Cell Supplied Vehicle for Public City Transportation
No full textA model of the supply-traction drive system related to a fuel-cell based vehicle for public transportation allows to investigate the influence of the components rating and of the control parameters on the supply system performances for a generic traction cycle and, in particular, on the overall efficiency. A parametric analysis allows to evaluate several quantities involved the performance assessment as functions of the design parameters. Such quantities are combined in a suitable objective function, included in a minimization algorithm to choose the input set of parameters which optimizes the supply system performanc
High efficiency LEVs
No full textThe increase exigency of mobility, and consequent the fall down effect on the global pollution due to the use of chemical propellant propulsion has rise the attention of the international community on the pollution free alternative. The paper addresses the main components of modern electric vehicles and the design of a Light Electric Vehicle (LEV) for middle range use. Industrial considerations about the exigency of dedicated infrastructure for introducing electric vehicles in large scales are reported with reference to the MES-DEA experience. A detailed description of the main characteristic of the fuel cell suited for LEV application are given. Experimental results of a full test of compliance for a PEM fuel cell optimized for LEV application are reported
Performance comparison among different converters fed by self excited wind driven induction generators
No full textPower pad design and optimization for contactless electric vehicle battery charging system
No full textInductive power transfer is a near-field technology for the transmission of electric energy via oscillating magnetic fields by inductive coupling between coils. The main issues related to this technology are the large air gap between coils and the lack of any ferromagnetic core, resulting in a weak coupling between transmitter and receiver coils and large leakage flux. Loosely coupled inductive power transfer systems have to be carefully designed to deliver power with high efficiency over relatively large air gaps, also having good tolerance to distance and misalignment. In the field of electric vehicles, contactless battery charging is a challenging solution to overcome mechanical hassles with charging cables and the long charging times. This paper deals with the optimized design of circular magnetic power pads for the contactless charging of electric vehicles. The paper investigates, by means of simulations through finite element software, how design parameters influence on the coupling and the power transmission
Coil design and magnetic shielding of a resonant wireless power transfer system for electric vehicle battery charging
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