کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6754046 1430817 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A general electromagnetic excitation model for electrical machines considering the magnetic saturation and rub impact
ترجمه فارسی عنوان
یک مدل تحریک الکترومغناطیسی عمومی برای ماشین های الکتریکی با توجه به اشباع مغناطیسی و اثر ضربه
کلمات کلیدی
لرزش، تحریک الکترومغناطیسی، اشباع، ضربه روبشی، ثبات،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The electromagnetic vibration of electrical machines with an eccentric rotor has been extensively investigated. However, magnetic saturation was often neglected. Moreover, the rub impact between the rotor and stator is inevitable when the amplitude of the rotor vibration exceeds the air-gap. This paper aims to propose a general electromagnetic excitation model for electrical machines. First, a general model which takes the magnetic saturation and rub impact into consideration is proposed and validated by the finite element method and reference. The dynamic equations of a Jeffcott rotor system with electromagnetic excitation and mass imbalance are presented. Then, the effects of pole-pair number and rubbing parameters on vibration amplitude are studied and approaches restraining the amplitude are put forward. Finally, the influences of mass eccentricity, resultant magnetomotive force (MMF), stiffness coefficient, damping coefficient, contact stiffness and friction coefficient on the stability of the rotor system are investigated through the Floquet theory, respectively. The amplitude jumping phenomenon is observed in a synchronous generator for different pole-pair numbers. The changes of design parameters can alter the stability states of the rotor system and the range of parameter values forms the zone of stability, which lays helpful suggestions for the design and application of the electrical machines.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 416, 3 March 2018, Pages 154-171
نویسندگان
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