Manufacturing Tolerances: Estimation and Prediction of Cogging Torque Influenced by Magnetization Faults

Permanent-magnet excited synchronous motor servo drives are increasingly employed in industrial applications. During mass production, deviations from the ideal machine occur. Thereby, parasitic effects such as cogging torque and torque ripple are influenced in particular. For permanent-magnet excite...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2012-05, Vol.48 (5), p.1932-1936
Main Authors: Coenen, I., van der Giet, M., Hameyer, K.
Format: Article
Language:English
Subjects:
Cogging torque
Cross-disciplinary physics: materials science
rheology
electrical machine
estimation of manufacturing fault tolerance
Exact sciences and technology
Forging
Magnetic flux
Magnetization
magnetization fault
Materials science
Other topics in materials science
Permanent magnets
permanent-magnet motor
Physics
Rotors
servo-drive
Stators
Torque
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Summary:Permanent-magnet excited synchronous motor servo drives are increasingly employed in industrial applications. During mass production, deviations from the ideal machine occur. Thereby, parasitic effects such as cogging torque and torque ripple are influenced in particular. For permanent-magnet excited machines, the magnet's quality is important. There are many possible failure configurations requiring the study of their influence on the machine's behavior. In this paper, an approach for the estimation of cogging torque considering magnetization faults is presented. This approach is applied to determine crucial configurations of permanent-magnet faults. The intent is to evaluate the influence of the faulty magnetic materials with its asymmetries on the later produced machine. In the process, analytical and numerical methods are combined whereby finally a small computational effort with accurate results is achieved.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2178252