Finite element analysis of an interior-magnet brushless D.C. Machine, with a step-skewed rotor

J. F. Eastham; D. M. Ionel; M. J. Balchin; T. Betzer; E. Demeter

doi:10.1109/20.582742

Finite element analysis of an interior-magnet brushless D.C. Machine, with a step-skewed rotor

J. F. Eastham, D. M. Ionel, M. J. Balchin, T. Betzer, E. Demeter

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The use of finite-element (FE) analysis as a tool for optimising the design of a new form of permanent-magnet electrical machine is described. In order to reduce unwanted torque and generated voltage pulsations, the rotor is divided into a number of separate sections that have both axial separation and different radial positions. FE analysis is employed to optimise: (i) spacer width between the rotor sections, and (ii) radial positioning of sections, in order to give minimum torque and voltage pulsation. In comparison with a single-section rotor, it was found that a 3-section rotor gave an 89% reduction in peak-to-peak torque pulsation. Where possible, the accuracy of the FE method was confirmed by comparison with experimental measurements.

Original language	English
Pages (from-to)	2117-2119
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	33
Issue number	2 PART 2
DOIs	https://doi.org/10.1109/20.582742
State	Published - 1997

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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abstract = "The use of finite-element (FE) analysis as a tool for optimising the design of a new form of permanent-magnet electrical machine is described. In order to reduce unwanted torque and generated voltage pulsations, the rotor is divided into a number of separate sections that have both axial separation and different radial positions. FE analysis is employed to optimise: (i) spacer width between the rotor sections, and (ii) radial positioning of sections, in order to give minimum torque and voltage pulsation. In comparison with a single-section rotor, it was found that a 3-section rotor gave an 89% reduction in peak-to-peak torque pulsation. Where possible, the accuracy of the FE method was confirmed by comparison with experimental measurements.",

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T1 - Finite element analysis of an interior-magnet brushless D.C. Machine, with a step-skewed rotor

AU - Eastham, J. F.

AU - Ionel, D. M.

AU - Balchin, M. J.

AU - Betzer, T.

AU - Demeter, E.

PY - 1997

Y1 - 1997

N2 - The use of finite-element (FE) analysis as a tool for optimising the design of a new form of permanent-magnet electrical machine is described. In order to reduce unwanted torque and generated voltage pulsations, the rotor is divided into a number of separate sections that have both axial separation and different radial positions. FE analysis is employed to optimise: (i) spacer width between the rotor sections, and (ii) radial positioning of sections, in order to give minimum torque and voltage pulsation. In comparison with a single-section rotor, it was found that a 3-section rotor gave an 89% reduction in peak-to-peak torque pulsation. Where possible, the accuracy of the FE method was confirmed by comparison with experimental measurements.

AB - The use of finite-element (FE) analysis as a tool for optimising the design of a new form of permanent-magnet electrical machine is described. In order to reduce unwanted torque and generated voltage pulsations, the rotor is divided into a number of separate sections that have both axial separation and different radial positions. FE analysis is employed to optimise: (i) spacer width between the rotor sections, and (ii) radial positioning of sections, in order to give minimum torque and voltage pulsation. In comparison with a single-section rotor, it was found that a 3-section rotor gave an 89% reduction in peak-to-peak torque pulsation. Where possible, the accuracy of the FE method was confirmed by comparison with experimental measurements.

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Finite element analysis of an interior-magnet brushless D.C. Machine, with a step-skewed rotor

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