Personne

Hardi Hõimoja

Cette personne n’est plus à l’EPFL

Publications associées (7)

Optimizing EV driving-recharge time ratio a under limited grid connection

An evident issue for electric vehicle (EV) is the limited average speed while driving long distances. This paper will provide a better understanding of EV requirements in order to make the electric vehicles more compatible for long distance driving. Batter ...

2014

Toward Ultrafast Charging of Electric Vehicles

Alfred Rufer, Hans Björn Püttgen, Massimiliano Capezzali, Michail Vasiladiotis, Hardi Hõimoja, Stefano Grioni

The paper is devoted to the problems arising from the ultrafast (≤ 10 min) charging of an electric vehicle (EV). An ultrafast charging station (UFCS) must provide high power output with minimal influence on the electricity transmission system, which can on ...

2012

Ultrafast Charging Compatibility of Electric Vehicles

Alfred Rufer, Rosa Martel Danoary Tsirinomeny, Hardi Hõimoja

To increase the appeal of electric vehicles, the trend is to shorten the charging time and to lengthen the autonomy. The new ultrafast charge compatible battery on lithium-titanate gives the best compromise between high power and energy densities. The main ...

2012

Infrastructure Issues Regarding the Ultrafast Charging of Electric Vehicles

Alfred Rufer, Hardi Hõimoja

This paper is devoted to the infrastructure issues arising from the ultrafast charging of electric vehicles in the timeframe of ~5 minutes. To mitigate variances and peaks caused by high energy transfer rate and pulse-like load, an ultrafast charging stati ...

2012

Power Quality Application of Hybrid Drivetrain

Hardi Hõimoja

This paper presents a study on the power conditioning features of hybrid powertrain, especially regarding diesel-electric locomotives. Equipped with an embarked energy buffer for diesel generator support and utility grid interface, such a locomotive can be ...

2012

Power interfaces and storage selection for an ultrafast EV charging station

Alfred Rufer, Michail Vasiladiotis, Hardi Hõimoja

The paper is a summary of the research conducted so far on the ultrafast charging issues of electric vehicles with the main emphasis on the infrastructure. In order to estimate the load curve and peaks resulting from high charging rate, simulations are car ...

2012

An Ultrafast EV Charging Station Demonstrator

Alfred Rufer, Hardi Hõimoja

This paper deals with the design of a grid-friendly ultrafast electric vehicle charging demonstrator. High charging power and short charging times impose peaks to an electricity distribution system, which necessitate over-dimensioning of the grid connectio ...

2012

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Connectez-vous pour utiliser Chat avec Graph Search