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Axial Unbalanced Magnetic Force in Permanent Magnet Motor due to Skewed Magnet and Rotor Eccentricities

Title
Axial Unbalanced Magnetic Force in Permanent Magnet Motor due to Skewed Magnet and Rotor Eccentricities
Author
장건희
Keywords
Axial unbalanced magnetic force (UMF); eccentricity; permanent magnet (PM) motor; skew
Issue Date
2017-04
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON MAGNETICS, v. 53, no. 11, Article no. 8210505
Abstract
We investigate the effect of a skewed permanent magnet (PM) with overhang on the axial unbalanced magnetic force (UMF) of a PM motor, especially in the presence of static and dynamic eccentricities of a rotor. We derive the mathematical equations of the axial UMF acting on PM motor due to the skewed PM with overhang and rotor eccentricities. We develop a 3-D finite-element model of the PM motor, not only to verify the frequency components of the proposed equations but also to determine the amplitude of the axial UMF. Further, we develop an experimental setup to measure the axial UMF caused by a skewed PM with overhang and rotor eccentricities. We confirm that the skewed PM with overhang generates an axial UMF with the harmonic of the least common multiple of pole and slot numbers. In addition, the static and dynamic eccentricities with the interaction of the skewed PM and overhang generate the axial UMF with the pole harmonics and slot harmonics, respectively.
URI
https://ieeexplore.ieee.org/document/7934001https://repository.hanyang.ac.kr/handle/20.500.11754/113618
ISSN
0018-9464; 1941-0069
DOI
10.1109/TMAG.2017.2708319
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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