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Failure Diagnosis for Demagnetization in Interior Permanent Magnet Synchronous Motors
Joint Authors
Ishikawa, Takeo
Igarashi, Naoto
Kurita, Nobuyuki
Source
International Journal of Rotating Machinery
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-16
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Since a high degree of reliability is necessary for permanent magnet synchronous motors, the detection of a precursor for the demagnetization of permanent magnets is very important.
This paper investigates the diagnosis of very slight PM demagnetization.
The permanent magnet volume is altered so as to mimic the effect of demagnetization.
This paper investigates the influence of demagnetization by using several methods: the 3D finite element analysis (FEA) of the motor, the measurement of high-frequency impedance, and the measurement and FEA of the stator voltage and current under vector control.
We have obtained the following results.
The back-EMF is proportional to permanent magnet volume, and there is no difference in the demagnetization in the radial direction and in the axial direction.
Even harmonics and subharmonics of flux density at the teeth tip could be useful for diagnosis if a search coil is installed there.
The relatively low frequency resistance at the d-axis position is useful for diagnosis.
Under vector control, the stator voltage is useful except in an intermediate torque range, and the intermediate torque is expressed by a simple equation.
American Psychological Association (APA)
Ishikawa, Takeo& Igarashi, Naoto& Kurita, Nobuyuki. 2017. Failure Diagnosis for Demagnetization in Interior Permanent Magnet Synchronous Motors. International Journal of Rotating Machinery،Vol. 2017, no. 2017, pp.1-13.
https://search.emarefa.net/detail/BIM-1169496
Modern Language Association (MLA)
Ishikawa, Takeo…[et al.]. Failure Diagnosis for Demagnetization in Interior Permanent Magnet Synchronous Motors. International Journal of Rotating Machinery No. 2017 (2017), pp.1-13.
https://search.emarefa.net/detail/BIM-1169496
American Medical Association (AMA)
Ishikawa, Takeo& Igarashi, Naoto& Kurita, Nobuyuki. Failure Diagnosis for Demagnetization in Interior Permanent Magnet Synchronous Motors. International Journal of Rotating Machinery. 2017. Vol. 2017, no. 2017, pp.1-13.
https://search.emarefa.net/detail/BIM-1169496
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1169496