Disc motor with reduced unsprung mass for direct EV wheel drive
Eastham, J.F.
Balchin, M.J.
Betzer, T.
Lai, H.C.
Gair, S.
Bath Univ.;
This paper appears in: Industrial Electronics, 1995. ISIE '95., Proceedings of the IEEE International Symposium on
Publication Date: 10-14 Jul1995
Volume: 2,
On page(s): 569-573 vol.2
Meeting Date: 07/10/1995 - 07/14/1995
Location: Athens, Greece
ISBN: 0-7803-2683-0
References Cited: 6
INSPEC Accession Number: 5281189
Digital Object Identifier: 10.1109/ISIE.1995.497248
Current Version Published: 2002-08-06
Abstract
A new drive system for electric vehicles is presented. An axial
flux disc motor is used. The stator of the machine is attached to the
chassis whilst the rotor directly drives the wheel. This arrangement
reduces the unsprung mass compared with a conventional wheel drive and
also, because of the machine geometry, permits movement of the wheel as
it is perturbed by the road. The motor is modelled using 2D and 3D
finite element techniques and estimates are given for the reduction in
torque and induced EMF when the rotor disc and stator are misaligned
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