Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 69, Issue 4, Pages 3357-3367Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3071701
Keywords
Vibrations; Force; Harmonic analysis; Power capacitors; Stators; Magnetic fields; Electromagnetics; Electromagnetic force; fractional-slot concentrated-windings (FSCWs); permanent magnet (PM) machines; vibration reduction design; vibration sources
Categories
Funding
- National Natural Science Foundation of China [51991383, 52025073]
- Key Research and Development Program of Jiangsu province [BE2018107]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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This article investigates the electromagnetic vibration source and its reduction design in fractional-slot concentrated-windings permanent magnet machines. Two new designs to reduce the vibration caused by the electromagnetic force modulation and stator MMF harmonics are proposed and validated through tests.
This article focuses on the electromagnetic vibration source and its reduction design in fractional-slot concentrated-windings (FSCWs) permanent magnet (PM) machines. First, the electromagnetic force and vibration characteristics of a 12-slot/10-pole FSCW PM machine are investigated. Then, four electromagnetic vibration sources are investigated and compared, in which the machine operating state is considered. The result shows that the electromagnetic force modulation and stator magnetomotive force (MMF) harmonics are the two sources that contribute most to the vibration underrated and heavy load condition, respectively. Afterward, two new designs to reduce the vibration caused by the electromagnetic force modulation and stator MMF harmonics are proposed, and the reduction principles are described in detail. Finally, the prototypes of the existing and proposed 12-slot/10-pole FSCW PM machines are manufactured. The tests are conducted to validate the theoretical analysis and proposed vibration reduction design.
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