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On the sizing of fractional slot PM machines oriented towards the improvement of their torque production capability

Ahmed Masmoudi (Research Unit on Renewable Energies and Electric Vehicles (RELEV), University of Sfax, Sfax, Tunisia)
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Abstract

Purpose

The purpose of this paper is to propose an approach to improve the torque production capability of fractional slot permanent magnet machines.

Design/methodology/approach

Following an analytical formulation of the electromagnetic torque, two optimization criteria are selected: the maximization of the average torque and the minimization of the torque ripple. For the sake of a simple analysis, the proposed approach assumes that the effects of the machine circumferential and radial parameters, on the torque production capability, are almost decoupled, so that their sizing optimization could be carried out separately.

Findings

The torque production capability of the optimized machine has been confirmed by finite element analysis, which confirms the appropriateness of the proposed sizing approach.

Practical implications

The obtained results should be validated by experiments carried out on a prototype.

Originality/value

The proposed approach has been carried out thanks to the introduction of the torque average value and ripple amplitude iso‐2D curves for circumferential parameters and iso‐3D surfaces for radial ones.

Keywords

Citation

Masmoudi, A. (2011), "On the sizing of fractional slot PM machines oriented towards the improvement of their torque production capability", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 30 No. 1, pp. 32-47. https://doi.org/10.1108/03321641111091412

Publisher

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Emerald Group Publishing Limited

Copyright © 2011, Emerald Group Publishing Limited

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