二層円環におけるはめあい面圧と固有振動数 : 電動機固定子の固有振動数解析のための実験

概要

論文の詳細を見る
Totally enclosed induction motors in which the stator core is pressed in the frame are in general used in industrial machines and manufactured with similar construction around the world. Some of these motors produce a strong electromagnetic noise, which is caused by resonance between the natural frequencies of the stator core and the harmonics of electromagnetic forces. As the first stage of research to estimate the natural frequencies of the stator core pressed into the motor frame, the dual rings were chosen as the object of studies. They are similar to the motor in construction and are easy to use to solve the problems. The purpose of this study is to investigate the effects of the tight fit to the natural frequencies. The dual ring with several kinds of interference were made by shrinkage fit and natural frequency and mode were measured up to 20 kHz. It was confirmed that lower contact pressure provided large reduction ratio of natural frequency. Then, reduction at higher mode were theoretically analyzed.
1999-01-25