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This paper deals with an online evaluation tool for application of electric vehicles for everyday utilization. The tool takes respect of the user defined range demands as well as the possible charging periods required due to the battery. In addition, customer parameters such as the load capacity and number of seats are taken into account. The tool is able to not only evaluate pure battery electric...
The fear of climate change encourages countries to work internationally on common plans to try stop the world wide temperature rise, as was seen in 2015 on the “United Nations Framework Convention on Climate Change, 21st Conference of the Parties”. The main objective is to avoid emission of greenhouse gases. Traffic is one major source of greenhouse gas emissions, however this sector offers deployment...
The optimization of the braking energy recovery helps to enlarge the range of an electric vehicle without an extension of the accumulator capacity. In currently available electric vehicles different recuperation strategies with diverse possibilities of activation are implemented. In this paper, several recuperation strategies are illustrated and discussed. Based on a simulation model energy savings...
Dimensioning the battery capacity for any kind of electric vehicle a compromise between electric range and costs has to be found. Therefore it is important for manufacturers to obtain characteristic values and profiles concerning user behavior, e.g. average daily driven distances, based on real life data. In this paper, corresponding results of a field test with extended range electric vehicles in...
Electric vehicles (EVs) and their application raise new questions and pose many new demands. Accordingly, the increasing amount of charging processes by EVs is a new and growing impact on the grid load. In order to deal with this impact and the resulting demands, load shifting allows the grid load to be adjusted. Taking this into consideration this paper initially analyzes, based on field test measurements,...
Electric vehicles (EVs) can help to decrease the emissions in the transport sector, especially in combination with an increase of renewable energies. However, for most of the people the comparably small range of EVs is still an obstacle concerning buying an EV. In this paper a project with a fleet test in the Ruhr-Area of Germany dealing with technologies for long distance electromobility is introduced...
Electric vehicles (EVs) and their application raise new questions and demands. Accordingly, the charging process of electric vehicles is a novelty in everyday life when using such vehicles. This paper presents results of user charging behavior within a field test. In the field test, 500 people with above average yearly mileage took part in integrating the vehicles into their everyday lives. The differences...
Electric vehicles (EVs) can help to decrease the emissions in the transport sector, especially in combination with an increase in renewable energies. However, the comparably small range of available EVs still prevents a higher volume of sales. In a fleet test in the Ruhr-Area of Germany, technologies for long distance electromobility, namely EVs with DC high power charging capability and EVs with...
Extended range electric vehicles offer the possibility to generate electrical energy with a setup of combustion engine and generator when the state of charge of the traction battery is low. As a result, the overall range can be extended to familiar values. The dimensioning of the purely electric range, i.e. the possible cruising range without use of the combustion engine, has much influence on the...
Most of the recent studies dealing with electric vehicles (EV) are based on assumptions in order to describe the behaviours of EV. To enhance the precision of these studies, data sets from real measurements are required. This paper shows EV consumptions which are based on measurements from a field test. This field test was realised with over 500 testing people who are a representative group for a...
As the cruising range is one of the main disadvantages of fully electric vehicles compared to vehicles with combustion engines, its improvement is an important research challenge momentarily. The recuperation of the braking energy is one research approach. In this paper, the theoretical potential of recuperation is discussed and a survey of recuperation strategies is presented. The recuperation energy...
A space vector based bang-bang controller driving a rotating target system (space vector bang-bang controller with flux related hysteresis shape SVBF) such as a machine or an ac-power-supply is discussed in this paper. A two-level, three-phase conventional inverter is used as means of power conversion. The advantages such as a low switching frequency as well as further opportunities of the SVBF are...
A drive train system (DTS) powered by an ideal voltage source and driving a permanent magnet synchronous motor (PMSM) is discussed in this paper. A two-level, three-phase conventional inverter with no harmonic filters on both AC and DC sides is used as means of power conditioning. This DTS is modelled as a double oscillator according to a drive train in an electric vehicle. Various inverter modulation...
Improvement on the cruising range is one of the main research challenges regarding fully electric vehicles, as the comparably low range is seen as one of the major disadvantages and therefore prevents sales. An optimised recuperation strategy can help to increase the range without an extension of the accumulator capacity. In this paper the possible range depending on various trip situations in (a)...
In this paper, a direct torque hysteresis controller (DTHC) driving a permanent magnet synchronous machine is discussed. A two-level, three-phase conventional inverter is used as means of power conversion. Advantages such as a low switching frequency as well as further opportunities of the DTHC are specified. The simulation results show a high degree of potential for the DTHC in future applications.
The low range is one main reason for the low sales volume of fully electric vehicles. With extended range electric vehicles it is possible to generate electrical energy with a setup of combustion engine and generator when the state of charge of the traction battery is low. As a result, the overall range can be extended to familiar values. The dimensioning of the purely electric range, i.e. the possible...
A drive train system (DTS) powered by an ideal voltage source and driving a permanent magnet synchronous motor (PMSM) is discussed in this paper. A two-level, three-phase conventional inverter with no harmonic filters on both AC and DC sides is used as means of power conditioning. This DTS is modelled as a double oscillator according to a simplified drive train in an electric vehicle. Commonly used...
Technical processes, such as the shredder process, require a high power quality of the supplying electric grid for proper function. Especially variations of the supply voltage at the point of connection can lead to consequences from a diminished process and output quality to an interruption of the entire technical process. These effects are evaluated for an induction machine driven shredder system...
An analysis of electric vehicles (EVs) dc-quick-chargers (DCQC) is discussed in this paper. This analysis contains a concept for application of a test bed for (DCQC). The second part of this paper shows security aspects of the DCQC. These are evaluated and exemplary measurements regarding safe usage of a DCQC are presented, including aspects of various facets, such as safety, insulation and short...
Improving the cruising range is one of the main research challenges regarding fully electric vehicles. The optimisation of the regenerative braking can help to enlarge the range without an extension of the accumulator capacity. In this paper, a general overview of recuperation strategies is given. The recuperation energy and therefore the obtained range extension of currently available electric vehicles...
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