Vibration of PM Brushless Machines Having a Fractional Number of Slots Per Pole

In this paper, a method for predicting the electromagnetic vibration of permanent magnet (PM) brushless motors is presented. It calculates the electromagnetic force on individual stator teeth by the Maxwell stress method, based on two-dimensional finite-element analysis of the electromagnetic field....

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Bibliographic Details
Published in:IEEE transactions on magnetics 2006-10, Vol.42 (10), p.3395-3397
Main Authors: Chen, Y.S., Zhu, Z.Q., Howe, D.
Format: Article
Language:English
Subjects:
Acoustic noise
Brushless machines
Brushless motors
Cross-disciplinary physics: materials science
rheology
Electromagnetic analysis
Electromagnetic fields
electromagnetic force
Electromagnetic forces
Exact sciences and technology
Finite element methods
Magnetic analysis
Magnetism
Materials science
Mathematical analysis
Mathematical models
Other topics in materials science
permanent magnet machines
Physics
Poles
Shells
Stators
Stress
Teeth
Vibration
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Description
Summary:In this paper, a method for predicting the electromagnetic vibration of permanent magnet (PM) brushless motors is presented. It calculates the electromagnetic force on individual stator teeth by the Maxwell stress method, based on two-dimensional finite-element analysis of the electromagnetic field. The resulting radial force contour is then used in an analytical shell model to predict the stator vibration. The method is validated experimentally, and is used to investigate the vibration in various PM brushless motors with different fractional slot/pole number combinations. The relationship between the slot/pole number combination and the dominant vibration frequency and mode order is also established
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2006.879072