This paper provides a comprehensive investigationinto the electromagnetic vibration associated with the sidebandharmonic components introduced by space vector pulsewidth modulation applied in integral-slot permanent magnetsynchronous machine drives. The critical permanent magnet,armature reaction, and sideband magnetic field components,which are the primary causes for sideband electromagneticvibration in integral-slot permanent magnet synchronous machines,are identified. The analytical derivations of the magneticfield components are carried out, and amplitudes andfrequencies of the resultant sideband radial electromagnetic forcecomponents are obtained. Furthermore, the proposed modelsof the sideband radial electromagnetic force components areincorporated into the vibration model to analytically evaluatethe corresponding sideband electromagnetic vibrations of themachine. Experimental tests on an integral-slot permanent magnetsynchronous machine drive are comprehensively performedto confirm the validity and accuracy of the analytical models.Not only can the validated analytical models offer insightfuldetails in understanding the impacts of the key factors, suchas operation conditions, machine geometry, electromagnetic andpower converter parameters, on the sideband electromagneticvibration, but also can be readily extended to assess and reducenoise in integral-slot permanent magnet synchronous machine drives.
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