Analytical Modeling of Electromagnetic Noise in Spoke-Type Permanent-Magnet Machines

This paper presents an analytical modeling of electromagnetic noise in spoke-type permanent-magnet (PM) machines (STPMMs). The two-dimensional (2-D) elementary subdomain (E-SD) technique in polar coordinates is used to predict the magnetic pressure, which is transferred to frequency domain and used in harmonic response mechanical analysis to predict generated electromagnetic noise. An electro-vibro-acoustic coupling based on a 2-D finite-element method (FEM) has been realized in order to validate the obtained results by the analytical modeling.