Three traction motors with different magnet materials — Influence on cost, losses, vehicle performance, energy use and environmental impact
Paper in 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.
environmental impact
efficiency
ferrite PMaSynRM
SmCo PMSM
FEM simulation
traction motors
automotive electric traction motors
electrical vehicle
NdDyFeB
SmCo
ferrites
SrFe3O4
strontium-ferrite magnets
NdDyFeB PMSM
life cycle assessment
Ferrites
cost estimation
SmCo motor
electric machine
permanent magnet machines
magnet materials
energy consumption
material cost estimate
permanent magnet motors
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,
Monte-Carlo, Monaco,
Electric traction motors in a circular economy
Swedish Energy Agency (44201-1), 2017-03-01 -- 2020-10-31.
Chalmers, 2017-03-01 -- 2020-10-31.
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