NDLI: Detection of magnet demagnetization in five-phase surface-mounted permanent magnet generators

Content Provider	IEEE Xplore Digital Library
Author	Casadei, D. Filippetti, F. Mengoni, M. Gritli, Y. Serra, G. Tani, A. Zarri, L.
Copyright Year	2012
Description	Author affiliation: Dept. of Electrical Engineering, University of Bologna, Bologna, Italy (Casadei, D.; Filippetti, F.; Mengoni, M.; Gritli, Y.; Serra, G.; Tani, A.; Zarri, L.)
Abstract	Multiphase generators are attractive particularly for medium and high power applications, because this technology allows reducing the current per phase and consequently the requirements of the inverter switches. The interest in multiphase machines is motivated also by their greater number of degrees of freedom compared to three-phase machines. This characteristic is often used to improve the machine performance, to increase the power density or for diagnostic purposes. In particular, the condition monitoring of the status of the magnets in permanent magnet synchronous generators is critical and is receiving an increasing attention. In this paper, the demagnetization of the rotor magnet trailing edges due to abnormal stator currents in five-phase surface-mounted permanent magnet synchronous generators is analyzed. A new non-invasive on-line detection method, which emphasizes the emf variation due to the demagnetization, exploiting the additional degrees of freedom of a multiphase generator, is presented. The proposed approach is validated by means of finite element analysis and numerical simulations.
Starting Page	841
Ending Page	848
File Size	325543
Page Count	8
File Format	PDF
ISBN	9781467320214
e-ISBN	9781467320238
e-ISBN	9781467320221
DOI	10.1109/PEDG.2012.6254099
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-25
Publisher Place	Denmark
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fault diagnosis Magnetic flux Five-phase generator Rotors Stator windings Variable speed generator Harmonic analysis Vectors Magnet demagnetization Demagnetization Permanent magnet synchronous generator
Content Type	Text
Resource Type	Article

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