Three traction motors with different magnet materials — Influence on cost, losses, vehicle performance, energy use and environmental impact
Paper i proceeding, 2018

The aim of reducing both cost and environmental impact of automotive electric traction motors motivates the examination of motor performance when using magnets of varying strength and materials. Such investigations have attracted increasing interest in recent years. Given the same take-off torque capability, three motors are compared that have the same stator geometry but different magnet materials in the rotor; two PMSMs - one with Nd(Dy)FeB and one with SmCo magnets - and one PMaSynRM with strontium-ferrite magnets. To compensate the weaker magnets, their corresponding core stacks are prolonged. The resulting torque capability at high speed levels is lower for the SmCo PMSM and ferrite PMaSynRM compared to the Nd(Dy)FeB PMSM. The ferrite PMaSynRM has the poorest dynamic vehicle performance, but also the lowest energy losses over a wide range of drive cycles. In addition, the ferrite based motor option has the lowest environmental impact during manufacturing as well as the lowest material cost estimate. The SmCo motor has slightly lower losses than the Nd(Dy)FeB, but the highest material cost. Certainly, the result signals that further in-depth studies of the described PMaSynRM are of high relevance.

permanent magnet motors

permanent magnet machines

magnet materials

electric machine

automotive electric traction motors

Ferrites

ferrite PMaSynRM

SmCo PMSM

SmCo

electrical vehicle

cost estimation

NdDyFeB PMSM

NdDyFeB

material cost estimate

environmental impact

efficiency

strontium-ferrite magnets

FEM simulation

energy consumption

ferrites

life cycle assessment

SmCo motor

SrFe3O4

traction motors

Författare

Emma Grunditz

Elmaskiner och kraftelektronik

Sonja Lundmark

Elmaskiner och kraftelektronik

Mikael C D Alatalo

Chalmers, Elektroteknik, Elkraftteknik

Torbjörn Thiringer

Elmaskiner och kraftelektronik

Anders Nordelöf

Chalmers, Teknikens ekonomi och organisation, Miljösystemanalys

2018 Thirteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)

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IEEE 2018 Thirteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
Monte-Carlo, Monaco,

Elmaskiner för fordon i en cirkulär ekonomi

Energimyndigheten, 2017-03-01 -- 2019-12-31.

Energimyndigheten, 2017-03-01 -- 2019-12-31.

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Produktion

Energi

Materialvetenskap

Ämneskategorier

Transportteknik och logistik

Miljöanalys och bygginformationsteknik

Annan elektroteknik och elektronik

Fundament

Grundläggande vetenskaper

DOI

10.1109/EVER.2018.8362387