フレーム・軸受ブラケット付電動機固定子鉄心の固有振動数解析法

概要

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The offensive electromagnetic noise of an induction motor generates when the natural frequencies of its stator core with windings, frame and bearing brackets coincide with or are close to frequencies of the magnetomotive forces. In order to avoid such noise it is necessary to estimate reliably the natural frequencies of stator core with the parts mentioned above in the designing stage. Therefore a practical method to estimate it in a totally enclosed type motor has been studied and cleared by an analysis used the finite element method (FEM). Especially it is characteristics of this method to use Young's modulus of windings as compound materials and the spring constants at contact surface between frame and core or bearing bracket. In expectation of being applied to products with similar constraction this paper is described a FEM analysis method by arranging our past reports and new results.
大同工業大学の論文