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PM-less machine topologies for EV traction: A literature review

Estenlund, Samuel LU orcid ; Alaküla, Mats LU orcid and Reinap, Avo LU orcid (2017)
Abstract
This literature review presents a summary of recent research about PM-less machines for electrical vehicles. Recently, IPM machines has proven to be very popular among electrical vehicle manufacturers. However, the neodymium permanent magnets being used are expensive and have a risk of rocketing the production cost of a machine if the price increases more. With this in mind, five PM-less machine topologies have been studied in recent literature. The topologies in question are synchronous reluctance machines, switched reluctance machines, double stator switched reluctance machines, electrically excited synchronous machines and induction machines. Their pros, cons and potential in the EV market are reviewed, coming to the conclusion that... (More)
This literature review presents a summary of recent research about PM-less machines for electrical vehicles. Recently, IPM machines has proven to be very popular among electrical vehicle manufacturers. However, the neodymium permanent magnets being used are expensive and have a risk of rocketing the production cost of a machine if the price increases more. With this in mind, five PM-less machine topologies have been studied in recent literature. The topologies in question are synchronous reluctance machines, switched reluctance machines, double stator switched reluctance machines, electrically excited synchronous machines and induction machines. Their pros, cons and potential in the EV market are reviewed, coming to the conclusion that they have a potential for the EV market, depending on how demands and techniques are developed. It is concluded that synRMs are cheap and easy to control, while design and material choices are the greatest challenges for it meet the requirements. SRMs are robust and simple to manufacture, but noise and torque ripple reduction as well as design and materials needs more research. EESMs have a wide operation area with high efficiency, but larger losses for higher load, which makes cooling a challenge. IMs are mature and reliable, but control can be improved and some trade-offs in the design choices has to be dealt with. (Less)
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author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)
external identifiers
  • scopus:85015404752
ISBN
978-1-5090-0815-5
978-1-5090-0814-8
DOI
10.1109/ESARS-ITEC.2016.7841341
language
English
LU publication?
yes
id
643cf8d5-0213-4529-80af-2e121ee1d2e2
date added to LUP
2024-09-26 11:05:20
date last changed
2025-06-07 04:35:54
@inproceedings{643cf8d5-0213-4529-80af-2e121ee1d2e2,
  abstract     = {{This literature review presents a summary of recent research about PM-less machines for electrical vehicles. Recently, IPM machines has proven to be very popular among electrical vehicle manufacturers. However, the neodymium permanent magnets being used are expensive and have a risk of rocketing the production cost of a machine if the price increases more. With this in mind, five PM-less machine topologies have been studied in recent literature. The topologies in question are synchronous reluctance machines, switched reluctance machines, double stator switched reluctance machines, electrically excited synchronous machines and induction machines. Their pros, cons and potential in the EV market are reviewed, coming to the conclusion that they have a potential for the EV market, depending on how demands and techniques are developed. It is concluded that synRMs are cheap and easy to control, while design and material choices are the greatest challenges for it meet the requirements. SRMs are robust and simple to manufacture, but noise and torque ripple reduction as well as design and materials needs more research. EESMs have a wide operation area with high efficiency, but larger losses for higher load, which makes cooling a challenge. IMs are mature and reliable, but control can be improved and some trade-offs in the design choices has to be dealt with.}},
  author       = {{Estenlund, Samuel and Alaküla, Mats and Reinap, Avo}},
  booktitle    = {{2016 International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)}},
  isbn         = {{978-1-5090-0815-5}},
  language     = {{eng}},
  month        = {{02}},
  title        = {{PM-less machine topologies for EV traction: A literature review}},
  url          = {{http://dx.doi.org/10.1109/ESARS-ITEC.2016.7841341}},
  doi          = {{10.1109/ESARS-ITEC.2016.7841341}},
  year         = {{2017}},
}