The influence of supply options of an asynchronous electric motor on emitted noise

Abstract

A comparison of the noise emitted by an asynchronous electric motor for various supply options has been presented in this paper. The star connection, one phase connection (with a run capacitor) and the use of an inverter have been taken under consideration. The test results show the effect of supply options of the electric motor on the sound power level, the shape of the noise spectra and directivity changes of the sound emitted by the tested asynchronous electric motor