Electromagnetic vibration of asynchronous electrical machine based on harmonic response
The electromagnetic vibration of large induction motor is the main component of the motor vi-bration.The evaluation of the motor vibration grade requires accurate electromagnetic vibration analysis.The electromagnetic vibration of a 10 kV megawatt induction motor was analyzed.Firstly,the mode anal-ysis of the complete motor model was carried out to solve its natural frequency and corresponding mode,and the actual operation of the motor natural frequency was measured experimentally.Then,the radial e-lectromagnetic force obtained by two-dimensional finite element calculation of electromagnetic field was used as the load to analyze the harmonic response of the motor.Finally,the vibration velocity was com-pared with that measured by experiment.The results show that the electromagnetic vibration analysis re-sults can be obtained accurately based on the mode analysis and harmonious response analysis of the whole model of large induction motor,which can provide a theoretical basis for the optimization design of the motor or electromagnetic vibration suppression.
induction motorelectromagnetic vibrationmode analysisharmonic responseelectromag-netic forcefinite element method
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