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Vibration analysis of brushless doubly fed machines in the presence of rotor eccentricity

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Abdi, Salman, Abdi, Ehsan, Toshani, Hamid and McMahon, Richard A. (2020) Vibration analysis of brushless doubly fed machines in the presence of rotor eccentricity. IEEE Transactions on Energy Conversion, 35 (3). pp. 1372-1380. doi:10.1109/TEC.2020.2987100 ISSN 0885-8969.

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Official URL: http://dx.doi.org/10.1109/TEC.2020.2987100

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Abstract

In this work, an analytical study has been performed on the Brushless Doubly Fed Machine's (BDFM) vibration due to the interaction of its fundamental magnetic fields, exerting bending forces in the back iron. The effects of rotor eccentricity on exacerbating the machine's vibration have been considered by assessing the stator back iron displacement function in the presence of rotor eccentricity. Finite element analysis is carried out for a 250 kW BDFM built in frame size D400 to validate the analytical methods. The stator back iron displacement is determined for an ideally-constructed machine as well as when the rotor has static and dynamic eccentricity. In addition, the prototype BDFM was tested at different operating conditions in order to examine its noise and vibration levels. A set of measurements was conducted to assess the main vibration component frequencies developed by the machine at different rotor speeds. It is shown that the main vibration components are created by bending set-up in the back iron, rotor eccentricity, and the components with time and space harmonic natures. The results obtained from finite element analysis and experimentally agree with the analytical assessment of BDFM vibration.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Electric motors, Brushless, Electric motors, Brushless -- Vibration , Vibration , Rotors -- Vibration , Harmonics (Electric waves), Finite element method
Journal or Publication Title: IEEE Transactions on Energy Conversion
Publisher: IEEE
ISSN: 0885-8969
Official Date: September 2020
Dates:
DateEvent
September 2020Published
15 April 2020Available
30 March 2020Accepted
Volume: 35
Number: 3
Page Range: pp. 1372-1380
DOI: 10.1109/TEC.2020.2987100
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): © 2020 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.
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 7 July 2020
Date of first compliant Open Access: 10 July 2020
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