Electromagnetic vibration characteristics of cylindrical permanent magnet linear motor
In order to explore the electromagnetic vibration characteristics of cylindrical linear motors,the vibration characteristics of a cylindrical linear motor were studied by establishing an analytical model of electromagnetic vibration that considers the spatial distribution of electromagnetic force.Firstly,the modal parameters of the simplified motor shell were derived based on the Love shell theory.Secondly,combined with the unique axial harmonic distribution and circumferential uniform distribu-tion of electromagnetic force of cylindrical permanent magnet linear motors,the simplified shell electromagnetic vibration of the motor was calculated based on the modal superposition method.The analytical calculation results were in good agreement with the finite element simulation values.Final-ly,using the proposed developed,analytical model the analysis reveals that the electromagnetic vibra-tion of cylindrical linear motors was determined by the radial breathing mode,and the high-frequency electromagnetic vibration amplitude of the motor was reduced by changing the switching frequency of the frequency converter.The relevant theoretical analysis and calculation results were verified through prototype experiments.
cylindrical permanent magnet linear motorelectromagnetic vibrationshell theorymodal superposition method
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