郭丹, 何永勇, 褚福磊. 不平衡磁拉力及对偏心转子系统振动的影响[J]. 工程力学, 2003, 20(2): 116-121.
引用本文: 郭丹, 何永勇, 褚福磊. 不平衡磁拉力及对偏心转子系统振动的影响[J]. 工程力学, 2003, 20(2): 116-121.
GUO Dan, HE Yong-yong, CHU Fu-lei. THE CALCULATION OF UNBALANCED MAGNETIC PULL AND ITS EFFECT ON VIBRATION OF AN ECCENTRIC ROTOR[J]. Engineering Mechanics, 2003, 20(2): 116-121.
Citation: GUO Dan, HE Yong-yong, CHU Fu-lei. THE CALCULATION OF UNBALANCED MAGNETIC PULL AND ITS EFFECT ON VIBRATION OF AN ECCENTRIC ROTOR[J]. Engineering Mechanics, 2003, 20(2): 116-121.

不平衡磁拉力及对偏心转子系统振动的影响

THE CALCULATION OF UNBALANCED MAGNETIC PULL AND ITS EFFECT ON VIBRATION OF AN ECCENTRIC ROTOR

  • 摘要: 研究了电机中由于相对偏心引起的不平衡磁拉力对转子系统振动的影响.首先把气隙磁导展开为Fourier级数的形式,通过转子或定子表面的Maxwell应力积分得到非线性不平衡磁拉力的解析表达式.然后代入到转子系统的运动方程中,采用隐式非线性NEWMARK积分法计算系统在不平衡磁拉力和质量偏心力作用下的动力响应,详细分析了电机参数对偏心转子系统振动的影响.研究结果为旋转机械轴系的动力分析及设计提供了理论依据.

     

    Abstract: The unbalanced magnetic pull(UMP)in a three-phase generator, caused by relative eccentricity, is calculated theoretically, and its effect on vibration of an eccentric rotor is studied. The air-gap permeance is expressed as a Fourier series. Then the UMP can be calculated by use of the Maxwell stress round either the rotor or stator surface and integration. The analytical expression of UMP for any pole-pair number is obtained and substituted into motion equation of system. The implicit nonlinear integer method- NEWMARK method is employed to solve the dynamic response of system under the UMP and eccentric mass force. Effects of relative eccentricity, rotor speed and pole number on the vibration of eccentric rotor are studied in detail.

     

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