Characteristic analysis and direct measurement for air gap magnetic field of external rotor permanent magnet synchronous motors in electric vehicles

Ma, C; Zhou, S; Yang, N; Degano, M; Gerada, C; Fang, J; Liu, Q

Characteristic analysis and direct measurement for air gap magnetic field of external rotor permanent magnet synchronous motors in electric vehicles

Ma, C Zhou, S Yang, N Degano, M Gerada, C Fang, J

Liu, Q

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Publisher:: Institution of Engineering and Technology
Publication Type:: Journal Article
Citation:: IET Electric Power Applications, 2020, 14, (10), pp. 1784-1794
Issue Date:: 2020-10-01

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Field	Value	Language
dc.contributor.author	Ma, C
dc.contributor.author	Zhou, S
dc.contributor.author	Yang, N
dc.contributor.author	Degano, M
dc.contributor.author	Gerada, C
dc.contributor.author	Fang, J https://orcid.org/0000-0003-0119-6108
dc.contributor.author	Liu, Q
dc.date.accessioned	2020-11-07T21:25:33Z
dc.date.available	2020-11-07T21:25:33Z
dc.date.issued	2020-10-01
dc.identifier.citation	IET Electric Power Applications, 2020, 14, (10), pp. 1784-1794
dc.identifier.issn	1350-2352
dc.identifier.issn	1751-8679
dc.identifier.uri	http://hdl.handle.net/10453/143834
dc.description.abstract	In this study, the air gap magnetic field characteristics of external rotor permanent magnet synchronous motors (PMSMs) under both the stator and rotor coordinate systems considering low-order current harmonics and high-order sideband current harmonics are analysed. A direct measurement technique (DMT) for air-gap magnetic field is proposed. First, an analytical model of air gap magnetic field of external rotor PMSMs is established. The spatial order and frequency characteristics of stator/rotor air gap magnetic field are revealed. Then, a 24-pole 27-slot external rotor PMSM is taken as an example. The analytical and finite element (FE) results are compared and analysed. The difference of the spatial order and frequency characteristics between the stator and rotor air gap magnetic field are verified. Next, a new DMT is proposed, which can detect the precise distribution and local microscopic characteristics on the order of 10 -1 mm with high resolution. The accuracy of analytical and FE model are verified by the DMT and an indirect experimental test of no-load back electromotive force. Finally, the mechanical challenges of in-wheel motors and the practicablility of DMT for eccentricity detection are further discussed
dc.language	English
dc.publisher	Institution of Engineering and Technology
dc.relation.ispartof	IET Electric Power Applications
dc.relation.isbasedon	10.1049/iet-epa.2019.0931
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	This paper is a postprint of a paper submitted to and accepted for publication in IET Electric Power Applications and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library.	en_US
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	Characteristic analysis and direct measurement for air gap magnetic field of external rotor permanent magnet synchronous motors in electric vehicles
dc.type	Journal Article
utslib.citation.volume	14
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2020-11-07T21:25:27Z
pubs.issue	10
pubs.publication-status	Published
pubs.volume	14
utslib.citation.issue	10

Abstract:

In this study, the air gap magnetic field characteristics of external rotor permanent magnet synchronous motors (PMSMs) under both the stator and rotor coordinate systems considering low-order current harmonics and high-order sideband current harmonics are analysed. A direct measurement technique (DMT) for air-gap magnetic field is proposed. First, an analytical model of air gap magnetic field of external rotor PMSMs is established. The spatial order and frequency characteristics of stator/rotor air gap magnetic field are revealed. Then, a 24-pole 27-slot external rotor PMSM is taken as an example. The analytical and finite element (FE) results are compared and analysed. The difference of the spatial order and frequency characteristics between the stator and rotor air gap magnetic field are verified. Next, a new DMT is proposed, which can detect the precise distribution and local microscopic characteristics on the order of 10 -1 mm with high resolution. The accuracy of analytical and FE model are verified by the DMT and an indirect experimental test of no-load back electromotive force. Finally, the mechanical challenges of in-wheel motors and the practicablility of DMT for eccentricity detection are further discussed

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http://hdl.handle.net/10453/143834