NDLI: Magnet losses and demagnetisation in a permanent magnet in-wheel electric vehicle traction motor

Content Provider	IEEE Xplore Digital Library
Author	Yang, Sichao Baker, Nick J. Mecrow, Barrie C. Smith, Daniel Atkinson, Glynn Hilton, Chris Perovic, Dragica K. Kakavas, Ioannis Sooriyakumar, Gunaratnam Harvey, Paul
Copyright Year	2015
Description	Author affiliation: Electric Power Research Group, Electrical Engineering School, Newcastle University, NE1 7RU, United Kingdom (Yang, Sichao; Baker, Nick J.; Mecrow, Barrie C.; Smith, Daniel; Atkinson, Glynn) \|\| Protean Electric Limited, Silvertree, Unit 10B, Coxbridge Business Park, Alton Road, Farnham, Surrey, GU10 5EH, United Kingdom (Hilton, Chris; Perovic, Dragica K.; Kakavas, Ioannis; Sooriyakumar, Gunaratnam; Harvey, Paul)
Abstract	This paper investigates magnet topologies and their susceptibility to demagnetisation in an in-wheel motor for an electric vehicle. The analysed motor is a high torque density, low speed, surface-mounted permanent magnet (SMPM) modular motor with fractional slot concentrated winding (FSCW) and an outer rotor. The rich spatial stator MMF harmonics present in the air gap have two effects: they generate AC losses in the magnets and they can increase the peak demagnetising field which the magnets experience. In this work, methods are first developed to give greater insight into the magnet loss mechanisms, thereby indicating when magnet segmentation is beneficial. The methods are then extended to examine how different rotor designs are affected by both loss and demagnetisation fields, showing major differences between rotor topologies.
Starting Page	1831
Ending Page	1837
File Size	4251391
Page Count	7
File Format	PDF
e-ISBN	9781479979417
DOI	10.1109/IEMDC.2015.7409313
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Harmonic analysis Magnetic flux Magnetic losses Stators Permanent magnet motors Eddy currents Demagnetization Magnet segmentation In-wheel motor V shape PM FSCW Magnet demagnetisation Analytical prediction 2D FEA eddy current stator MMF harmonics Current sheet
Content Type	Text
Resource Type	Article

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