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Permanent magnet synchronous machines (PMSM) have been widely used in a variety of applications. A strong electromagnetic force exists between the rotor magnets and the stator core in a PMSM. The force directly causes mechanical deformation and vibration of the stator. In small PM motors, mechanical vibration comes mainly from the electromagnetic force of the stator. This paper gives the general expression...
The rotor mechanical stresses and deformation of various interior permanent magnet (IPM) motors have been investigated by finite element method (FEM). The bridge and segment area of IPM rotors have been taken great attention, as the severe stresses and deformation are generated at high speed. Both the centrifugal forces and electromagnetic forces have been considered in the analysis. The electromagnetic...
In this paper, a method for predicting the electromagnetic vibration of PM brushless motors is presented. It has accounted for both PM blushless AC and DC motors. It calculates the electromagnetic force on individual stator teeth by the Maxwell stress method, based on 2-D finite element analysis of the electromagnetic field. The resulting radial force contour is then used in an analytical mechanical...
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