Elimination of torque pulsations in a direct drive EV wheel motor

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.539359· OSTI ID:403369

Hredzak, B; Gair, S ^[1]; Eastham, J F ^[2]

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1. Napier Univ., Edinburgh (United Kingdom)
2. Univ. of Bath (United Kingdom)

Double sided axial field machines are attractive for direct wheel drives in electric vehicles. This is due to the fact that stator/rotor misalignments can be accommodated. In this case the stator of the machine is envisaged mounted on the chassis of the car while the rotor directly drives the road wheel. Since the wheel is perturbed by the road surface the rotor will move vertically between the outside stator assemblies and thus give rise to torque pulsations. A vector control scheme has been implemented whereby the torque pulsations are eliminated by (i) calculation of the flux variation due to the rotor perturbation and (ii) using this signal for the modulation of the motor input current.

• OSTI ID: 403369
• Report Number(s): CONF-960425--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 5Pt2 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
ALIGNMENT
CONTROL
ELECTRIC MOTORS
ELECTRIC-POWERED VEHICLES
MAGNETIC FLUX
TORQUE
WHEELS