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Energy supply to buses on a conductive electric road : An evaluation of charger topologies and electric road characteristics

Karlsson, Anton LU and Alaküla, Mats LU orcid (2021) In World Electric Vehicle Journal 12(4).
Abstract

An electric road system (ERS) enables transfer of electric energy to a moving vehicle, making it possible to reduce the capacity—and cost—of the battery and the need for static chargers. A conductive electric road allows for relatively low complexity whilst being able to provide high levels of power. When utilising a conductive electric road, safety precautions must be considered with regard to isolation between the charging supply (the electric road) and the vehicle’s traction voltage system (TVS), since no protective Earth connection can be guaranteed. Isolation can be achieved by separating the two systems galvanically or by double isolating the entire TVS and all equipment connected to it on-board the vehicle. This study used the... (More)

An electric road system (ERS) enables transfer of electric energy to a moving vehicle, making it possible to reduce the capacity—and cost—of the battery and the need for static chargers. A conductive electric road allows for relatively low complexity whilst being able to provide high levels of power. When utilising a conductive electric road, safety precautions must be considered with regard to isolation between the charging supply (the electric road) and the vehicle’s traction voltage system (TVS), since no protective Earth connection can be guaranteed. Isolation can be achieved by separating the two systems galvanically or by double isolating the entire TVS and all equipment connected to it on-board the vehicle. This study used the experimental results from a previous paper to model and evaluate three different electric powertrains/charger topologies, including a novel integrated design fulfilling the required safety features. The models were used in a full vehicle model and further investigated in a city bus scenario in terms of how charging performance, energy consumption and battery ageing are affected by the aforementioned charging topologies and electric road characteristic. We discovered that charging topology has a strong influence on energy consumption, and that electric road characteristics have a strong influence on battery ageing.

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Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dynamic charging, EV, Galvanic isolation, Integrated charging
in
World Electric Vehicle Journal
volume
12
issue
4
article number
241
publisher
MDPI AG
external identifiers
  • scopus:85120787475
ISSN
2032-6653
DOI
10.3390/wevj12040241
project
Energy transfer on conductive electric roads
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
id
3ab2b074-20fc-48ea-91d1-88bde6637b20
date added to LUP
2022-01-31 10:21:07
date last changed
2022-11-16 20:27:28
@article{3ab2b074-20fc-48ea-91d1-88bde6637b20,
  abstract     = {{<p>An electric road system (ERS) enables transfer of electric energy to a moving vehicle, making it possible to reduce the capacity—and cost—of the battery and the need for static chargers. A conductive electric road allows for relatively low complexity whilst being able to provide high levels of power. When utilising a conductive electric road, safety precautions must be considered with regard to isolation between the charging supply (the electric road) and the vehicle’s traction voltage system (TVS), since no protective Earth connection can be guaranteed. Isolation can be achieved by separating the two systems galvanically or by double isolating the entire TVS and all equipment connected to it on-board the vehicle. This study used the experimental results from a previous paper to model and evaluate three different electric powertrains/charger topologies, including a novel integrated design fulfilling the required safety features. The models were used in a full vehicle model and further investigated in a city bus scenario in terms of how charging performance, energy consumption and battery ageing are affected by the aforementioned charging topologies and electric road characteristic. We discovered that charging topology has a strong influence on energy consumption, and that electric road characteristics have a strong influence on battery ageing.</p>}},
  author       = {{Karlsson, Anton and Alaküla, Mats}},
  issn         = {{2032-6653}},
  keywords     = {{Dynamic charging; EV; Galvanic isolation; Integrated charging}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{4}},
  publisher    = {{MDPI AG}},
  series       = {{World Electric Vehicle Journal}},
  title        = {{Energy supply to buses on a conductive electric road : An evaluation of charger topologies and electric road characteristics}},
  url          = {{http://dx.doi.org/10.3390/wevj12040241}},
  doi          = {{10.3390/wevj12040241}},
  volume       = {{12}},
  year         = {{2021}},
}