Three traction motors with different magnet materials — Influence on cost, losses, vehicle performance, energy use and environmental impact
Paper in proceedings, 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.

magnet materials

SrFe3O4

FEM simulation

ferrite PMaSynRM

efficiency

electrical vehicle

permanent magnet motors

SmCo

NdDyFeB

SmCo motor

material cost estimate

traction motors

electric machine

energy consumption

SmCo PMSM

permanent magnet machines

ferrites

NdDyFeB PMSM

Ferrites

environmental impact

cost estimation

strontium-ferrite magnets

automotive electric traction motors

life cycle assessment

Author

Emma Grunditz

Chalmers, Electrical Engineering, Electric Power Engineering

Sonja Lundmark

Chalmers, Electrical Engineering, Electric Power Engineering

Mikael C D Alatalo

Chalmers, Electrical Engineering, Electric Power Engineering

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering

Anders Nordelöf

Chalmers, Technology Management and Economics, Environmental Systems Analysis

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

1-13

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

Electric traction motors in a circular economy

Swedish Energy Agency, 2017-03-01 -- 2019-12-31.

Swedish Energy Agency, 2017-03-01 -- 2019-12-31.

Driving Forces

Sustainable development

Areas of Advance

Transport

Production

Energy

Materials Science

Subject Categories

Transport Systems and Logistics

Environmental Analysis and Construction Information Technology

Other Electrical Engineering, Electronic Engineering, Information Engineering

Roots

Basic sciences

DOI

10.1109/EVER.2018.8362387

More information

Latest update

1/17/2019