Title :
Acoustic noise in inductive power components
Author :
Miihlethaler, Jonas ; Schubiger, Manuel ; Badstubner, Uwe ; Kolar, Johann Walter
Author_Institution :
Gecko-Simulations AG, Zurich, Switzerland
Abstract :
This paper deals with the acoustic emissions of PWM-operated inductive components in the medium frequency range. It is shown with measurements that the noise emissions are primarily caused by magnetostriction, an induction-dependent dimensional change of the magnetic core. The influences of various modulation parameters on the sound pressure level spectra of two prototypes are measured and analyzed. It is confirmed that the emitted sound is proportional to the square of the magnetic flux density.
Keywords :
acoustic emission; acoustic measurement; inductors; magnetic cores; PWM-operated inductive components; acoustic emissions; acoustic noise; induction-dependent dimensional change; magnetic core; magnetic flux density; medium frequency range; Acoustic measurements; Acoustic noise; Frequency measurement; Magnetic cores; Magnetoacoustic effects; Magnetostriction; Noise;
Conference_Titel :
Power Electronics and Applications (EPE), 2013 15th European Conference on
Conference_Location :
Lille
DOI :
10.1109/EPE.2013.6634420
