Top Research Papers on Electric Vehicles

This paper describes the protective relaying schemes employed by Georgia Power Company to protect synchronous generators from smgle-phaseto-ground faults. Three types of relays are connect¬ ed in the secondary of a distribution grounding transformer. These include a conventional electro¬ mechanical overcurrent relay with time overcurrent unit and instantaneous overcurrent unit, a solidstate overvoltage relay (with timing module) tuned to reject frequencies near 180 hertz, and a solid-state undervoltage relay (with timer) tuned to reject fre¬ quencies near 60 hertz present at the generator neut...

The basic advantages of electric vehicles (EVs) are: (a) no emissions at the point of their operation, (b) very low emissions, if the energy is produced in normal power stations, (c) lower energy consumption compared to conventional cars, and (d) very low noise during operation. Their main disadvantage is the limited driving range due to the limited capacity of the battery which cannot be usually recharged quickly. Since most of the cars in cities don't drive more than 50 km during a day and since this is easily possible for electric vehicles they are the best vehicles which help to improve th...

The renewed interest in electric vehicles (EVs) in the wake of the California Air Resources Board mandate that 2% of the vehicles lighter than 3750 lb (1700 kg) sold by each manufacturer in that state in 1998 be zero-emission vehicles is examined. The reasons why replacing an internal combustion vehicle (ICV) with an electrically powered equivalent greatly reduces air pollution, not only where the EV is driven, but over the rest of the map as well are discussed. Three drawbacks that have kept EVs from taking over, despite the fact that they are quieter and more reliable as well as less polluti...

The requirements for the climatisation of electric vehicles largely depend on the vehicles usage location. For example, electric vehicles operated in European countries require heating during the winter season, while those operated in equatorial regions face cooling load throughout the year. To date, the low range for a given battery charge remains the single-most important factor hindering the widespread acceptance of electric vehicles. The principal electrical load of an electric vehicle used in equatorial regions comprises of the traction motor and the air-conditioning compressor motor. The...

Electric vehicles (EV), as a promising way to reduce the greenhouse effect, have been researched extensively. With improvements in the areas of power electrics, energy storage and support, the plug-in hybrid electric vehicle (PHEV) provides competitive driving range and fuel economy compared to the internal combustion engine vehicle (ICEV). Operating with optimized control strategies or utilizing the concept of the energy management system (EMS), the efficiency of the PHEV could be significantly improved. In this review paper, the operating process of the various types of EVs will be explained...

The greatest limitation to the impact of the electric vehicle on transportation remains the battery. Current lead-acid batteries have a shorter range and are considered heavy and bulky. Figures developed by TRW, Inc. estimate that a battery weight equal to half of the total vehicle weight is needed to provide unsonable urban driving cycles using current lead-acid batteries. The nickel-zinc batteries would allow a vehicle to provide an acceptable urban driving range with a battery weight of any 20%. The nickel-iron battery, also under consideration, has a longer potential service life, but a sp...

,

The present invention relates to a vehicle (11) having electric drive, the vehicle comprising: at least one deformable element (20); at least one secondary transformer unit (10); at least one shield against electromagnetic radiation element (21).

The invention relates to a vehicle (11) with an electric drive, comprising at least one deformation element (20); at least one secondary transformer unit (10); and at least one screening element (21) against electromagnetic radiation.

Electric vehicles (EVs) are currently seen as an important means to make transport more sustainable; however, so far, only a few EVs are actually on the roads. This paper tries to identify likely early private users of EVs based on a narrative review of results from earlier studies by the authors. Two usage scenarios are analyzed: (1) the traditional model of car use where the EV is bought or leased by the household whose members drive the vehicle (individual usage), and (2) concepts where EVs are used as part of shared fleets (collective usage). Findings indicate that, for both scenarios, lik...

Vehicle battery electric drive is housed in a battery box provided below the floor (4) at the rear of the vehicle (20) is protected against frontal collisions and rear collisions as possible luggage compartment only slightly so as not to shrink. For this purpose, the floor (4) has a-out contour larger notch of the battery box (20) (11) in plan view, has a notch (11) is reinforced edge (12), the battery box ( front support member facing downward for 20) (30) and the rear support member (13) is attached to reinforced edge (12), stop surface rear support member (13) which is inclined to the lower...

Since the electric vehicle of the present invention, the lifting device is installed, it can be mounted without the aid of other equipment to complete their own battery power handling, while the removable battery module can be a user without consuming too much power, to move.

The present invention relates to a vehicle having an electric drive that comprises a motor for driving at least one wheel on one of the axles.

The author suggests that electric battery vehicles can compete on favourable terms with other forms of traction, and the subject is therefore worthy the attention of the younger generation

ACCORDING to the Electrical Times of September 28, one result of the outbreak of war is a considerable increase in the number of inquiries received by manufacturers of electric accumulators and vehicles as to the price of their wares, the charges of electricity required by the vehicles and the distance traversed for a given charge on a smooth road. Petrol rationing has compelled owners of motor-vehicles to curtail seriously their usual transport facilities, and they are considering the relative advantages of petrol and electricity for transport. Since electric vehicles take their power from st...

EVs are the story of the moment. We break their exponential growth down to takeaway statistics

In view of the heavy investments by governments and the private sector in industrialised countries in electric vehicle development an attempt is made to assess the extent to which these efforts will pay off, particularly in the us market. The impacts of two types of vehicles are examined: electric vehicles entirely dependent on energy stored in batteries, and hybrid vehicles equipped with both an electric motor and a small auxiliary internal combustion engine. Electric vehicles will continue to be serially produced at costs higher than comparable internal combustion engined cars until mass pro...

Disclosed is an electric drive vehicle provided with a long-life diesel boost type power circuit, the circuit layout of which can be implemented inexpensively and in a straightforward manner.

Electric motor efficiency and development of modern energy storage system cause that electrical vehicles become the technical and economic substitute to gasoline cars. The generalized prospect of electrical vehicles advancement is presented in this article. The various arguments in favor of and against them are shown. The development of electric drive vehicles is the one of the major research subjects in the Electrotechnical Institute. The research on electric drives with implementation of novel solutions in the area of power electronics, steering, new generation of motors and IT are performed...

During traveling of an electric drive vehicle (100), if a quantity of regenerative power generated by a synchronous motor generator (40) is greater than a first predetermined value, a slip frequency S of an induction motor generator (50) is changed while maintaining a torque output of the induction motor generator (50), thereby increasing power consumption by the induction motor generator 50. With this structure, it is possible to effectively protect electric devices when excessive power regeneration occurs.