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Title: Audible noise in speed-controlled inverter-fed medium-sized induction-motors
Authors: Muster, J ×
Budig, Pk
Belmans, Ronnie
Geysen, Willy
Sattler, Pk #
Issue Date: Jan-1995
Publisher: VDE-Verlag
Series Title: European Transactions on Electrical Power Engineering vol:5 issue:1 pages:5-13
Abstract: The audible noise produced by three-phase, squirrel-cage induction motors, is caused by the space harmonics of the flux-density distribution in the air gap of the machine. When the motor is supplied by a frequency inverter in order to control the speed, time harmonics in both current and voltage are present, yielding new components in the audible noise spectrum. In the paper; a number of motor-inverter combinations are compared for medium-sized induction motors (90 kW). As a reference case, the motors are supplied with a generator, delivering a variable frequency without harmonics. Theoretical explanations for the increase of the audible noise level and the additional frequency components are given.
ISSN: 0939-3072
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - ELECTA, Electrical Energy Computer Architectures
× corresponding author
# (joint) last author

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