DocumentCode :
3361156
Title :
An acoustic model for a permanent magnet machine: modal shapes and magnetic forces
Author :
Verdyck, D. ; Belmans, Ronnie ; Geysen, W.
Author_Institution :
Katholieke Univ., Leuven, Belgium
fYear :
1992
fDate :
4-9 Oct. 1992
Firstpage :
292
Abstract :
A modal analysis concept for calculating the vibrational level of an electrical machine stator is presented. Using this concept, the designer is freed from calculating real magnet forces, which is normally difficult and inaccurate. Only flux linkages have to be calculated which can be easily done using finite element methods and the vector potential as the unknown function. Furthermore, the energy method also deals with any random or tangential movement of the stator surface. The main disadvantage is the need to know the mode shapes accurately. These can only be measured with great effort in the low-frequency region (up to 1 kHz). In the higher frequency regions, hundreds of modes exist, although, at this point, other approximations can be made.<>
Keywords :
finite element analysis; machine theory; magnetic fields; permanent magnet machines; stators; acoustic model; electrical machine stator; finite element methods; flux linkages; magnetic forces; modal analysis concept; mode shapes; permanent magnet machine; vibrational level; Acoustic noise; Frequency; Magnetic fields; Magnetic forces; Magnetic materials; Permanent magnet machines; Production; Shape; Stators; Vibrations;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
0-7803-0635-X
Type :
conf
DOI :
10.1109/IAS.1992.244281
Filename :
244281
Link To Document :
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