Analytical prediction of rotor eddy current loss in brushless machines equipped with surface-mounted permanent magnets, Part I. Magnetostatic field model

Z. Q. Zhu, K. Ng, N. Schofield, D. Howe

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

43 Citations (Scopus)

Abstract

An analytical technique for predicting the rotor eddy current loss in brushless motors equipped with surface-mounted permanent magnets is described. The analytical model, formulated in polar coordinates and based on the calculation of the two-dimensional magnetostatic field in the airgap/magnet regions, enables the eddy current loss to be calculated in the permanent magnets and the retaining sleeve, if fitted, of motors having either radial or parallel magnetised magnets and either overlapping or nonoverlapping stator windings, and can cater for any specified load condition. The technique is applied to a brushless DC traction machine, in which the rotor loss is due predominantly to time harmonics in the stator armature reaction field which resulted from commutation events, and loss predictions are compared with thermometric-based measurements. Good agreement is achieved at low speeds. However, a significant discrepancy exists at high speeds, due to the neglect of the eddy current reaction field. This is accounted for in a refined analytical model described in part II.

Original languageEnglish
Title of host publicationICEMS 2001 - Proceedings of the 5th International Conference on Electrical Machines and Systems
EditorsWang Fengxiang, Tang Renyuan
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages806-809
Number of pages4
VolumeII
ISBN (Electronic)7506251159, 9787506251150
DOIs
Publication statusPublished - 6 Aug 2002
Externally publishedYes
Event5th International Conference on Electrical Machines and Systems - Shenyang, China
Duration: 18 Aug 200120 Aug 2001
Conference number: 5
https://ieeexplore.ieee.org/document/970597

Conference

Conference5th International Conference on Electrical Machines and Systems
Abbreviated titleICEMS 2001
CountryChina
CityShenyang
Period18/08/0120/08/01
Internet address

Fingerprint

Dive into the research topics of 'Analytical prediction of rotor eddy current loss in brushless machines equipped with surface-mounted permanent magnets, Part I. Magnetostatic field model'. Together they form a unique fingerprint.

Cite this