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清华大学学报(自然科学版)  2017, Vol. 57 Issue (1): 89-94,99    DOI: 10.16511/j.cnki.qhdxxb.2017.21.017
  电机工程 本期目录 | 过刊浏览 | 高级检索 |
永磁直流电机定子的振动分析
曹海翔1, 沈靖文1, 王善铭1, 牟佳男2, 杨占录1, 洪剑锋1
1. 清华大学 电机工程与应用电子系, 电力系统及发电设备控制和仿真国家重点实验室, 北京 100084;
2. 国家电网公司 国家电力调度控制中心, 北京 100031
Analyses of permanent magnet DC motor stator vibrations
CAO Haixiang1, SHEN Jingwen1, WANG Shanming1, MU Jianan2, YANG Zhanlu1, HONG Jianfeng1
1. State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
2. National Electric Power Dispatching and Control Center, State Grid Corporation of China, Beijing 100031, China
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摘要 永磁直流电机的定子振动具有鲜明的特性,对它的分析对于分析其他各类电机的振动具有借鉴作用。该文用解析法分析了电机内的磁场和径向电磁激振力,从物理概念上定性解释了直流电机振动的特征。特别地,指出永磁直流电机槽频电磁激振力的阶数与定子振动形态的空间阶数不同。为准确计算电机振动,利用电磁场有限元仿真了电机内的磁场与电磁力分布,并采用结构场有限元对定子振动进行了仿真。针对试验测试,指出为得到定子振动形态特征,需要在定子上测量足够多的测点。并在一台实际的直流电机上进行振动测试,试验结果与仿真结果相符。
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曹海翔
沈靖文
王善铭
牟佳男
杨占录
洪剑锋
关键词 永磁直流电机电磁激振力振动振动形态    
Abstract:Stator vibrations in permanent magnet DC motors have distinct characteristics which are also useful for analyzing other types of motors. The magnetic fields and the electromagnetic forces in permanent magnet DC motors were analyzed to characterize the physical mechanisms driving the vibrations. The order of the slot-frequency electromagnetic exciting force is not equal to the spatial order of the stator slot-frequency vibration shape. Accurate analyses of the vibrations inputs the magnetic field and electromagnetic force distributions calculated by finite element simulations into a structural finite element simulation to predict the stator vibrations. Experiments must have enough sensors to obtain the vibration mode shape. The predictions agree well with data from DC motor tests.
Key wordspermanent magnet DC motor    electromagnetic exciting force    vibration    mode of vibration
收稿日期: 2016-09-21      出版日期: 2017-01-20
ZTFLH:  TM331+.3  
通讯作者: 王善铭,副教授,E-mail:wangsm96@mails.tsinghua.edu.cn     E-mail: wangsm96@mails.tsinghua.edu.cn
引用本文:   
曹海翔, 沈靖文, 王善铭, 牟佳男, 杨占录, 洪剑锋. 永磁直流电机定子的振动分析[J]. 清华大学学报(自然科学版), 2017, 57(1): 89-94,99.
CAO Haixiang, SHEN Jingwen, WANG Shanming, MU Jianan, YANG Zhanlu, HONG Jianfeng. Analyses of permanent magnet DC motor stator vibrations. Journal of Tsinghua University(Science and Technology), 2017, 57(1): 89-94,99.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2017.21.017  或          http://jst.tsinghuajournals.com/CN/Y2017/V57/I1/89
  图1 永磁直流电机的截面图
  图2 永磁体表面径向磁通密度分布
  图3 永磁体表面圆周上径向力密度分布
  图4 永磁体表面中心点磁通密度随时间变化
  图5 每个磁极下的转子槽数为2.5时的磁极受力
  图6 每个磁极下的转子槽数为2时的磁极受力
  图7 磁极受不平衡力产生的定子的变形
  图8 永磁直流电机定子三维简化模型及网格剖分
  表1 材料属性
  图9 1200Hz的槽频定子振动
  图10 传感器位置分布
  图11 点a7的振动加速度频谱
  图12 360°范围内测量结果
  图13 180°范围内测量结果
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