Abstract
Closer attention has been given to the acoustic noise performance of electric motors as electrified powertrains penetrate into our transportation system. In particular, switched reluctance machine introduces a new challenge to acoustic noise aspect given that the temporal harmonics of high amplitudes on the radial direction can excite the natural frequencies of the main circumferential modes. A practical understanding of the radial force density decomposition is crucial in identifying the primary source of acoustic noise at different operating points, and it is the main contribution of this paper. An analytical expression is introduced to identify the temporal harmonic orders that excite different spatial mode shapes. The combination of the circumferential and temporal harmonic orders results in a force density surface wave that travels in the clockwise (CW) or counter CW direction. The mode excitation is investigated along with the sound pressure level produced by the primary vibrating mode shapes. Acoustic noise characteristics for each mode and the corresponding natural frequency at different speeds have been analyzed by using a waterfall plot.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Transportation Electrification
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
