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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Abnormal Electromagnetic Noise of Motors depending on Fixing Methods of Permanent Magnets

1
Research & Development Division, Hyundai Motor Company
2
Research & Development Division, Hyundai Motor Company
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2015, 7(2), 195-200; https://doi.org/10.3390/wevj7020195
Published: 26 June 2015
PDF [2474 KB, uploaded 18 May 2018]

Abstract

Abnormal electromagnetic noise of traction motor in hybrid electric vehicle (HEV) occurred after the endurance test is experimentally investigated. Theoretical model explains that the abnormal components, which are ±1 orders of the number of slots, can be sourced from an unbalanced rotor. Experimental approach confirms that the abnormal noise is mainly from the rotor. Since there are no variations in the strength of the magnet flux, the vibration of the magnets is strongly believed as the main reason of the abnormal noise. Finally, the magnetic fixing method is changed from bond to mold, and the improvement of the noise is demonstrated.
Keywords: abnormal electromagnetic noise; hybrid electric vehicle; permanent magnet; unbalanced force; vibration abnormal electromagnetic noise; hybrid electric vehicle; permanent magnet; unbalanced force; vibration
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kim, M.; Kim, H. Abnormal Electromagnetic Noise of Motors depending on Fixing Methods of Permanent Magnets. World Electr. Veh. J. 2015, 7, 195-200.

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