Audible noise in speed‐controlled inverter‐fed medium‐sized induction motors
Identifieur interne : 002976 ( Main/Exploration ); précédent : 002975; suivant : 002977Audible noise in speed‐controlled inverter‐fed medium‐sized induction motors
Auteurs : J. Muster ; P. K. Budig ; R. Belmans ; W. Geysen ; Ph. K. SattlerSource :
- European Transactions on Electrical Power [ 1430-144X ] ; 1995-01.
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.
Url:
DOI: 10.1002/etep.4450050102
Affiliations:
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