THEORETICAL VIBRATION ANALYSIS OF SOFT MOUNTED TWO-POLE INDUCTION MOTORS WITH STATIC ROTOR ECCENTRICITY

被引：3
|
作者：
Werner, Ulrich [1 ]
机构：
[1] Siemens AG, Ind Drive Technol LD PD, D-90441 Nurnberg, Germany
来源：
INTERNATIONAL JOURNAL OF APPLIED MECHANICS | 2011年 / 3卷 / 01期
关键词：
Electrical motor; rotordynamics; orbit; ASYNCHRONOUS MACHINES; PULL;
D O I：
10.1142/S1758825111000919
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The paper shows a mathematical model for vibration analysis of soft mounted two-pole induction motors regarding electromagnetic excitation due to static rotor eccentricity. A static rotor eccentricity causes an electromagnetic force, acting on the rotor and on the stator and oscillating with the double supply frequency. This magnetic force is implemented into a simplified analytical machine dynamic model and the correlations between the rotor dynamics, electromagnetic, oil film characteristics of the sleeve bearings, and the stiffness and damping of a soft foundation are mathematically described. The derived results are clarified using an example that shows the influence of the rotor speed and the direction of the magnetic force on the vibration behavior. On one hand the aim of the paper is to show the mathematical correlations, based on a simplified model. On the other hand, the aim is to derive a method for calculating the forced vibrations - as a worst case - caused by a static rotor eccentricity. Therefore, the paper shall prepare the basis for implementing this method in more detailed numerical programs, e.g., finite element programs.
引用
收藏
页码：131 / 159
页数：29
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