Electric Vehicle Acceleration Performance and Motor Drive Cycle Energy Efficiency Trade-Off
Paper in proceedings, 2018

During passenger car design, both high acceleration performance and low energy consumption are targeted. For battery electric vehicles (BEVs) to reach these objectives, it is vital to evaluate the consequences that different motor design choices have on them. This paper presents a quantitative analysis of the effect on acceleration performance and motor losses during BEV driving, when the motors power rating is varied. Two reference traction machines are sized and evaluated using finite element analysis, for a small and large BEV. Via axial scaling, the motors' power is then varied linearly by factors between 0.5-2, and the changes in motor losses are accounted for. Both the 0-100km/h acceleration time and motor losses during several low, middle and high speed drive cycles are calculated. Depending on drive cycle, scale factors between 0.5-1.0 give the lowest motor losses with both BEVs. The lowest are down to 67% and 61 % of the losses with scale factor 1.0, for the small and large BEV respectively. Yet, then the acceleration time varies non-linearly between 28s-13s for the small BEV and 20s-10s for the large, respectively. Hence, the results demonstrate a clear trade-off between targeting high acceleration performance and low energy consumption during driving.

AC machines

permanent magnet machines

Roads

hybrid electric vehicles

Traction motors

motor drive cycle energy efficiency trade-off

vehicle dynamics

automotive application

Acceleration

Force

traction motors

passenger car design

electric vehicles

electric vehicle acceleration performance

battery powered vehicles

motor drives

energy conservation

electric drives

Permanent magnet motors

automobiles

energy consumption

Wheels

Torque

design for environment

finite element analysis

Author

Emma Grunditz

Chalmers, Electrical Engineering, Electric Power Engineering

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering

Proceedings 2018 XIII International Conference on Electrical Machines (ICEM)

2381-4802 (ISSN)

717-723 8507201

2018 XIII International Conference on Electrical Machines (ICEM)
Alexandroupoli, Greece,

Electric motors and converters

Chalmers, 2016-01-01 -- 2019-12-31.

Driving Forces

Sustainable development

Areas of Advance

Transport

Energy

Subject Categories

Vehicle Engineering

Energy Systems

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/ICELMACH.2018.8507201

More information

Latest update

1/22/2019