Resonance of electromagnetic and mechanic coupling in hydro-generator  

作　　者：姚大坤 邹经湘 曲大庄 赵树山 于开平 

机构地区：[1]Dept.of Astronautics and Mechanics,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2006年第5期531-534,共4页哈尔滨工业大学学报（英文版）

基　　金：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).

摘　　要：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.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 hydrogenerator rotors.

关 键 词：HYDRO-GENERATOR INSTABILITY COUPLING RESONANCE 

分 类 号：TM312[电气工程—电机] O322[理学—一般力学与力学基础]