Abstract：Taking a small asynchronous motor of 1.1kW as prototype, modal tests were done using hammering method. The stators with no windings, with unvarnished windings, with varnished windings and with windings which were cut off the ends, as well the whole motors were as the test objects. Meanwhile it is ensured that the stators of all the test models are identical. The second order radial natural frequency of the stator was recognized through the magnitude and phase of the acceleration frequency response functions derived from the tests. Base on the test results, the difference between the natural frequencies of stator with varnished and unvarnished windings was analyzed; as well the influence that the end windings made on the natural frequency of stator was discussed. The natural frequencies of the stators without windings and with windings which were cut down the ends were calculated respectively by numerical method. At the same time, 3D whole domain finite element method(FEM) calculation model of the prototype was established, and a constraint was imposed on the connection of rotor and bearing, so full consideration was made into the influence that rotor made on the modal of the motor. The calculated and test results were compared. Finally, the effects that the rotor, the end caps and the motor shell made on the modal of the stator were discussed.
谢颖,王严,吕森,葛红岩,刘海松. 小型异步电机模态计算与试验分析[J]. 电工技术学报, 2015, 30(16): 1-9.
Xie Ying,Wang Yan,Lü Sen,Ge Hongyan,Liu Haisong. Modal Calculation and Test of Small Asynchronous Motor. Transactions of China Electrotechnical Society, 2015, 30(16): 1-9.
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