Design optimisation of ironless motors based on magnet selection


Autoria(s): Greaves, Matthew C.; Walker, Geoffrey R.; Walsh, Bernard B.
Data(s)

2002

Resumo

This paper considers the design of a radial flux permanent magnet iron less core brushless DC motor for use in an electric wheel drive with an integrated epicyclic gear reduction. The motor has been designed for a continuous output torque of 30 Nm and peak rating of 60 Nm with a maximum operating speed of 7000 RPM. In the design of brushless DC motors with a toothed iron stator the peak air-gap magnetic flux density is typically chosen to be close to that of the remanence value of the magnets used. This paper demonstrates that for an ironless motor the optimal peak air-gap flux density is closer to the maximum energy product of the magnets used. The use of a radial flux topology allows for high frequency operation and can be shown to give high specific power output while maintaining a relatively low magnet mass. Two-dimensional finite element analysis is used to predict the air-gap flux density. The motor design is based around commonly available NdFeB bar magnet size

Identificador

http://eprints.qut.edu.au/63578/

Publicador

Engineers Media Pty Ltd.

Relação

http://search.informit.com.au/fullText;dn=493754512584207;res=IELENG

Greaves, Matthew C., Walker, Geoffrey R., & Walsh, Bernard B. (2002) Design optimisation of ironless motors based on magnet selection. Australian Journal of Electrical and Electronics Engineering, 22(1), pp. 43-48.

Direitos

Copyright 2002 Institution of Engineers

Fonte

School of Electrical Engineering & Computer Science; Science & Engineering Faculty

Palavras-Chave #090205 Hybrid Vehicles and Powertrains #090603 Industrial Electronics #air gaps #brushless DC motors #finite element analysis #machine theory #magnetic flux #optimisation #permanent magnet motors
Tipo

Journal Article