341 有限要素法による誘導電動機の固定子鉄心の固有振動数解析

概要

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Silent running is an essential environmental requirement for electric motors. Motors generate vibration as well as noise while running. The major factors of noise responsible for electromagnetic noise are the increase in flux density resulting from the compact design of induction motors and the decrease in structural rigidity resulting from lightweight construction. Electromagnetic noise is generated when the electromagnetic force frequency coincides or approximates the natural frequency of the stator core. Therefore to reduce the electromagnetic noise, it is essential that the motor design exclude resonance phenomena. It is important to know the natural frequency as well as the frequency of the electromagnetic force. In this paper, the natural frequency of small induction motor has been analyzed in the finite element method. Aiming to the noise reduction, the improvement in accuracy of the natural frequency analysis of stator in the finite element method is described. To improve it, the modulus of equivalent elasticity of winding and stator steel sheets is defined.
一般社団法人日本機械学会の論文
2005-08-22