Title :
Analytical Prediction of Noise of Magnetic Origin Produced by Permanent Magnet Brushless Motors
Author :
Gieras, Jacek F. ; Wang, Chong ; Joseph, Jacek F Gieras Chong Wang ; Ertugrul, Nesimi
Author_Institution :
Hamilton Sundstrand, Rockford
Abstract :
Prediction of acoustic noise radiated by electric motors is nowadays important both for machine manufacturers and users. This paper describes an engineering approach to prediction of noise of magnetic origin produced by permanent magnet (PM) brushless motors. The sound power level (SWL) is calculated on the basis of magnetic field analysis in the air gap, radial forces, natural frequencies of the stator-frame system and radiation efficiency coefficient. Accuracy problems encountered in the analytical and numerical noise prediction have been discussed.
Keywords :
brushless machines; permanent magnet motors; acoustic noise radiated; air gap; analytical prediction; engineering approach; magnetic field analysis; permanent magnet brushless motors; radial forces; radiation efficiency coefficient; sound power level; stator frame system; Acoustic noise; Acoustical engineering; Brushless motors; Electric motors; Frequency; Magnetic analysis; Magnetic fields; Magnetic noise; Manufacturing; Power engineering and energy; brushless motors; magnetic field; noise; permanent magnets;
Conference_Titel :
Electric Machines & Drives Conference, 2007. IEMDC '07. IEEE International
Conference_Location :
Antalya
Print_ISBN :
1-4244-0742-7
Electronic_ISBN :
1-4244-0743-5
DOI :
10.1109/IEMDC.2007.383568
