Rare-earth-free propulsion motors for electric vehicles: a technology review

Abstract

Several factors including fossil fuels scarcity, prices volatility, greenhouse gas emissions or current pollution levels in metropolitan areas are forcing the development of greener transportation systems based on more efficient electric and hybrid vehicles. Most of the current hybrid electric vehicles use electric motors containing powerful rare-earth permanent magnets. However, both private companies and estates are aware of possible future shortages, price uncertainty and geographical concentration of some critical rare-earth elements needed to manufacture such magnets. Therefore, there is a growing interest in developing electric motors for vehicular propulsion systems without rare-earth permanent magnets. In this paper this problematic is addressed and the state-of-the-art of the electric motor technologies for vehicular propulsion systems is reviewed, where the features required, design considerations and restrictions are addressed.

Peer Reviewed

Document type: Article

Original document

The different versions of the original document can be found in:

• http://dx.doi.org/10.1016/j.rser.2015.12.121 under the license https://creativecommons.org/licenses/by-nc-nd

• http://hdl.handle.net/2117/87933

• https://upcommons.upc.edu/bitstream/2117/87933/1/Rev1_2015_12_14_e-print.pdf under the license http://creativecommons.org/licenses/by-nc-nd/3.0/es/

• https://api.elsevier.com/content/article/PII:S136403211501504X?httpAccept=text/xml,

https://api.elsevier.com/content/article/PII:S136403211501504X?httpAccept=text/plain,

http://dx.doi.org/10.1016/j.rser.2015.12.121 under the license cc-by-nc-nd

• https://www.sciencedirect.com/science/article/abs/pii/S136403211501504X,

https://ideas.repec.org/a/eee/rensus/v57y2016icp367-379.html,

https://upcommons.upc.edu/handle/2117/87933,

https://core.ac.uk/display/41830767,

http://citec.repec.org/d/eee/rensus/v_57_y_2016_i_c_p_367-379.html,

https://EconPapers.repec.org/RePEc:eee:rensus:v:57:y:2016:i:c:p:367-379,

http://www.sciencedirect.com/science/article/pii/S136403211501504X,

https://upcommons.upc.edu/bitstream/2117/87933/1/Rev1_2015_12_14_e-print.pdf,

https://academic.microsoft.com/#/detail/2227297875 under the license https://www.elsevier.com/tdm/userlicense/1.0/