Magnetic and vibration element analysis of PM motor under frequencies including magnetostriction

This paper presents a generalized magneto-elastic 3D finite element model, which can be used to analyze magnetic and structural vibration of laminated cores including magnetostriction effects. Magnetostriction is a property of electrical steel and is an important cause next to reluctance forces of the vibration for motor cores. Implement the model, the vibration of a permanent magnetic synchronous motor core is analyzed and measured under frequencies. The analysis results show that the vibration due to magnetostriction is significant and the magnitude of vibration is ralated with the operating frequency, which is agreement with the measurement results.