有限要素法による電動機固定子鉄心の固有振動解析の場合の巻線の縦弾性係数

概要

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The electromagnetic noise of an induction motor is very offensive to human ear. Most offensive electromagnetic noise is generated when natural frequencies of a stator core coincide with or are close to frequencies of the magnet motive forces. So, in order to avoid such noise, it is necessary to estimate accurately natural frequencies of the stator core in the design stage. Therefore, we have studied and found a practically possible method to obtain natural frequencies by using the finite element method (FEM). In case of using FEM the most important and unknown constants are Young's modulus of the windings. By experimental investigations used a number of winding samples the reliable and practical Young's modulus were obtained. We call these modulus as the equivalent Young's modulus for FEM analyses.
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