Detection of static and dynamic eccentricities in a permanent magnet motor by monitoring BEMF

Title
Detection of static and dynamic eccentricities in a permanent magnet motor by monitoring BEMF
Authors
장건희
Keywords
Dynamics; Induction motors; Stators; Rotors; Permanent magnet motors; Harmonic analysis; Air gaps
Issue Date
2015-05
Publisher
IEEE
Citation
2015 IEEE International Magnetics Conference (INTERMAG), Page. 1-1
Abstract
One of the major faults of electric motors is a breakdown of bearing because it is the most flexible component under cyclic loading between stator and rotor. Most of bearing faults in electric motors result from localized defect of bearing and generate vibration and noise, which eventually degrades the performance of motor-driven systems. Many researches have been proposed various methods to detect bearing faults by measuring vibration and noise. In electrical point of view, bearing fault changes static and dynamic air gap, which change magnetic field and input current of electric motors. Several researchers studied the diagnostic technique of motor faults by monitoring vibration and current. However, another possible signal of electric motors due to static and dynamic eccentricities is back electromotive force (BEMF) and this research proposes a method to detect static and dynamic eccentricities of a permanent magnet (PM) motor by measuring BEMF. It derives mathematical equations of BEMF due to static and dynamic eccentricities of a PM motor, and performed experiment to validate the derived equations.
URI
http://ieeexplore.ieee.org/document/7156821/http://hdl.handle.net/20.500.11754/24722
ISBN
978-1-4799-7322-4
ISSN
2150-4598; 2150-4601
DOI
http://dx.doi.org/10.1109/INTMAG.2015.7156821
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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