The optimal configuration of a multi-stacked permanent-magnet generator
The optimal configuration of a multi-stacked permanent-magnet generator
The multi-stacked permanent-magnet generator is studied in detail experimentally and its field analysed using two methods of computation. The first involves the discretisation of the magnetic circuit and obtaining a balance between the field of the magnet, the armature reaction of the stator and the reluctance of the discretised flux paths. This method is called the discrete-reluctance method. The second is a three-dimensional finite-element method using scalar potentials. The accuracy of both methods of computation is discussed and their limitations assessed. The discrete-reluctance method is the less accurate of the two, but is much more efficient in computer processing time. The detailed analysis of the field using the finite-element method is used to refine the discrete-reluctance method by improving the accuracy of the representation of the flux paths of the magnetic circuit. The analysis of the imbricated rotor using the finite-element program enables the three-dimensional field to be studied in a precise way. The leakage fluxes in the rotor are also quantified. The program is used to monitor the effects of changes in the geometry of the flux guides, in particular that of the pole profile, on the field of the rotor. From this analysis, conclusions are drawn about the optimal configuration of the flux guide. The results of the field analysis using the finite-element program and the improved version of the discrete-reluctance method are used for the optimisation of designs and the study of the effect of scale and the influence of magnet characteristics on the optimal configuration of the multi-stacked permanent-magnet generator. In addition, the behaviour of an anisotropic polymer-bonded rare-earth magnet under the influence of external crossfields at right-angles is studied. A tensor representation of the magnet is proposed from the analysis of the experimental data obtained. This representation is implemented in a finite-element program and tested.
University of Southampton
Low, Teck Seng
78d2c526-d0ea-486b-ae0d-55cca4aec1eb
1982
Low, Teck Seng
78d2c526-d0ea-486b-ae0d-55cca4aec1eb
Low, Teck Seng
(1982)
The optimal configuration of a multi-stacked permanent-magnet generator.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The multi-stacked permanent-magnet generator is studied in detail experimentally and its field analysed using two methods of computation. The first involves the discretisation of the magnetic circuit and obtaining a balance between the field of the magnet, the armature reaction of the stator and the reluctance of the discretised flux paths. This method is called the discrete-reluctance method. The second is a three-dimensional finite-element method using scalar potentials. The accuracy of both methods of computation is discussed and their limitations assessed. The discrete-reluctance method is the less accurate of the two, but is much more efficient in computer processing time. The detailed analysis of the field using the finite-element method is used to refine the discrete-reluctance method by improving the accuracy of the representation of the flux paths of the magnetic circuit. The analysis of the imbricated rotor using the finite-element program enables the three-dimensional field to be studied in a precise way. The leakage fluxes in the rotor are also quantified. The program is used to monitor the effects of changes in the geometry of the flux guides, in particular that of the pole profile, on the field of the rotor. From this analysis, conclusions are drawn about the optimal configuration of the flux guide. The results of the field analysis using the finite-element program and the improved version of the discrete-reluctance method are used for the optimisation of designs and the study of the effect of scale and the influence of magnet characteristics on the optimal configuration of the multi-stacked permanent-magnet generator. In addition, the behaviour of an anisotropic polymer-bonded rare-earth magnet under the influence of external crossfields at right-angles is studied. A tensor representation of the magnet is proposed from the analysis of the experimental data obtained. This representation is implemented in a finite-element program and tested.
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Published date: 1982
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Local EPrints ID: 460248
URI: http://eprints.soton.ac.uk/id/eprint/460248
PURE UUID: bdc595aa-19ca-4c43-ac24-ec9c5a02b64f
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Date deposited: 04 Jul 2022 18:16
Last modified: 16 Mar 2024 18:37
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Author:
Teck Seng Low
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