Effects of manufacturing tolerances of permanent magnets in fractional slot permanent magnet synchronous machines

Zárate Barriga, Sergio; Almandoz, Gaizka; Ugalde, Gaizka; Poza, Javier

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Title

Effects of manufacturing tolerances of permanent magnets in fractional slot permanent magnet synchronous machines

xmlui.dri2xhtml.METS-1.0.item-contributorOtherinstitution

Orona EIC

Version

http://purl.org/coar/version/c_970fb48d4fbd8a85

Rights

Access

http://purl.org/coar/access_right/c_abf2

URI

https://hdl.handle.net/20.500.11984/1676

Publisher’s version

http://dx.doi.org/10.1049/joe.2018.8199

Published at

Journal of Engineering-JOE Nº. 17. Pp. 4060-4064. IET, 2019

xmlui.dri2xhtml.METS-1.0.item-publicationfirstpage

4060

xmlui.dri2xhtml.METS-1.0.item-publicationlastpage

4064

Publisher

IET

Keywords

Synchronous machines
Magnetization curves
Hysteresis
Barkhausen and related effects ... [+]

Synchronous machines
Magnetization curves
Hysteresis
Barkhausen and related effects
Finite element analysis [-]

Abstract

The fractional slot permanent magnet synchronous machines are well-known for their low torque ripple. However, in mass-production machines, not all the permanent magnets are identical due to the manufacturing tolerances and new torque harmonics could appear. In addition, the magnetic field is modified and unbalanced magnetic pull (UMP) could happen. Apart from that it is important to study the effect on vibrations since the magnetic field is no longer ideal. So, here, a study of the effect of unevenly magnetised permanent magnet distribution on torque ripples, unbalance magnetic pull, and vibrations is proposed. Apart from that, the tolerance grade sensitivity is studied. Finally, experimental tests show good agreement with finite element analysis. [-]