| Resonance of electromagnetic and mechanic coupling in hydro-generator |
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| 作者姓名： | 姚大坤 邹经湘 曲大庄 赵树山 于开平 |
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| 作者单位： | Dept.of Astronautics and Mechanics Harbin Institute of Technology，Harbin 150001，China，Dept.of Astronautics and Mechanics，Harbin Institute of Technology，Harbin 150001，China，Dept.of Astronautics and Mechanics，Harbin Institute of Technology，Harbin 150001，China，Dept.of Astronautics and Mechanics，Harbin Institute of Technology，Harbin 150001，China，Dept.of Astronautics and Mechanics，Harbin Institute of Technology，Harbin 150001，China |
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| 基金项目： | Sponsored by the National Natural Science Foundation of China(Grant No.59493700),Key Project of the National Tenth-Five Year Research Programme of China(Grant No.ZZ01-01-04-03). |
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| 摘 要： | The stability of a hydro-generator has become asignificant topic because of its increasing capacity andsize.Non-uniform air-gap between the rotor and thestator causes the unbalanced magnetic pull,whichbrings on vibration of the shaft1-4].The unbalancedmagnetic pull used to be simplified linearly,and is pro-portionate to the eccentricity,and then the problem ofthe stability is changed into solving the steady-state re-sponse of the linear system5].With this simplifiedmodel,only the relationshi…
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| 关 键 词： | 水轮发电机 不稳定性 耦合 共振 |
| 文章编号： | 1005-9113（2006）05-0531-04 |
| 收稿时间： | 2005-10-17 |
Resonance of electromagnetic and mechanic coupling in hydro-generator |
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| YAO Da-kun,ZOU Jing-xiang,QU Da-zhuang,ZHAO Shu-shan,YU Kai-ping.Resonance of electromagnetic and mechanic coupling in hydro-generator[J].Journal of Harbin Institute of Technology,2006,13(5):531-534. |
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| Authors: | YAO Da-kun ZOU Jing-xiang QU Da-zhuang ZHAO Shu-shan YU Kai-ping |
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| Abstract: | Electromagnetic and mechanical forces are main reasons of oscillations in hydro-generators.The oscillation is fairly complicated as to the coupling of them.Using the method of multiple scales in nonlinear oscillations,instabilities of hydro-generator rotors caused by the unbalanced magnetic pull,which comes from the eccentricity of the rotor,are discussed.Considering nonlinear properties of the unbalanced magnetic pull,the super-harmonic resonance phenomena are observed as the critical rotating speed of rotors is close to twice of the operating speed.This is verified by a model experiment,and should be considered during the design of hydro-generator rotors. |
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| Keywords: | hydro-generator instability coupling resonance |
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