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Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield

Al-Ani, Mahir, Barrans, Simon and Carter, J. (2017) Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield. 2017 IEEE International Electric Machines & Drives Conference (IEMDC).

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For high-speed applications, the surface-mounted permanent magnet (SPM) machine is preferred due to its high torque density and efficiency. However, induced eddy currents in the rotor conductive parts result in a loss of efficiency and rotor heating. Therefore, several methods to reduce such losses have been proposed in the literature including copper shielding. In this paper, a high-speed SPM machine rotor with a copper shield is designed and investigated both electromagnetically and mechanically. Several quantitative investigations including placing the copper sheet around the retaining sleeve or magnets, different copper sheet and airgap thicknesses, different retaining sleeve materials, different harmonic contents in the current waveform, i.e. pulse amplitude modulation (PAM) and pulse width modulation (PWM) generated waveforms, and different frequencies and current levels are reported. Additionally, a mechanical analysis investigating possible failure modes of the rotor with the copper sheet is reported.

Item Type: Article
Additional Information: © © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Copper shield; Conductive shield; SPM; Surface-mounted; Loss reduction; Eddy current loss
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Schools: School of Computing and Engineering
Related URLs:
Depositing User: Mahir Al-ani
Date Deposited: 07 Jun 2017 08:31
Last Modified: 26 Mar 2018 16:31


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