Title :
The origin of acoustic noise in variable-reluctance motors
Author :
Cameron, D.E. ; Lang, J.H. ; Umans, S.D.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
Abstract :
The authors study the origin of acoustic noise in inverter-driven variable reluctance motors (VRMs). A brief discussion of several hypothetical noise sources is given. These sources are investigated by performing a series of stationary and rotational experiments on a 1/2 hp VRM. The experiments show that resonant vibrations of the stator induced by radial magnetic forces in the motor are responsible for most of the acoustic noise. A method for predicting the stator´s resonant frequencies and mode shapes is outlined and evaluated. A model of the VRM for predicting the radial acceleration of the stator is presented. Preliminary results from this model are presented.<>
Keywords :
acoustic noise; invertors; reluctance motors; stators; acoustic noise sources; inverter-driven variable reluctance motors; radial acceleration; radial magnetic forces; resonant vibrations; stator; Acceleration; Acoustic noise; Magnetic forces; Magnetic noise; Magnetic resonance; Predictive models; Reluctance motors; Resonant frequency; Shape; Stators;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96638
