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Effects of Mechanical Resonance on Vibrations of Mechanical Systems With Permanent Magnet Machines

Authors
Shin, Hyeon-JaeChoi, Jang-YoungCho, Han-WookHong, Keyyong
Issue Date
11월-2014
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
Electromagnetic vibration; impact test; permanent magnet (PM) synchronous machines; resonance
Citation
IEEE TRANSACTIONS ON MAGNETICS, v.50, no.11
Journal Title
IEEE TRANSACTIONS ON MAGNETICS
Volume
50
Number
11
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/845
DOI
10.1109/TMAG.2014.2320289
ISSN
0018-9464
1941-0069
Abstract
In this paper, we describe the effects of mechanical resonance on the vibrations of mechanical systems with permanent magnet (PM) machines. Electromagnetic vibration sources produced by a PM machine were calculated using finite element analysis (FEA) solutions. Subsequently, the harmonic orders related to the mechanical vibrations of the PM machine itself were investigated experimentally by driving the machine at various rotor speeds. To investigate the effects of mechanical resonance, a cantilever beam whose mechanical resonance frequency can be changed by adjusting its length was employed. Finally, the resonance condition was achieved by matching the natural frequency of the cantilever beam with the vibration frequencies produced by the PM machine. The natural frequency mode shapes were validated using 3-D FEA solutions, and the results were confirmed through modal analyses of the frequency response function results from impact tests. Comparisons of the measured vibration data of the PM machine with and without the cantilever demonstrated that mechanical resonance significantly influenced the vibrations of mechanical systems using PM machines.
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