DYNAMIC CHARACTERISTICS OF ENERGY STORAGE FLYWHEEL ROTOR WITH INITIAL STATIC ECCENTRICITY

被引：0
|
作者：
Zhang H. [1 ,2 ]
Liu Y. [1 ,2 ]
Teng W. [1 ,2 ]
Wu X. [1 ,2 ]
机构：
[1] Key Laboratory of Power Station Energy Transfer, Transformation and System, Ministry of Education, North China Electric Power University, Beijing
[2] Advanced Flywheel Energy Storage Technology Research Center, North China Electric Power University, Beijing
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 03期
关键词：
dynamics; electromechanical coupling; energy storage; flywheels; initial static eccentricity; rotors; unbalanced magnetic pull;
D O I：
10.19912/j.0254-0096.tynxb.2022-1736
中图分类号：
学科分类号：
摘要：
A high-power energy storage flywheel rotor system is taken as the research object to explore the dynamic characteristics of the flywheel rotor when the motor has initial static eccentricity. Firstly，the relationship between the unbalanced magnetic pull（UMP）and the eccentric displacement of the motor rotor is calculated using energy method. And then the electromechanical coupling dynamic model of the flywheel rotor considering UMP is established using the Timoshenko beam element model. Finally，the effects of the magnitude and direction of the eccentricity on steady and transient state dynamic characteristics of the flywheel rotor system are calculated and analyzed. The following conclusions are drawn that with the increase of eccentricity，a nested ring appears in the axial trajectory at the upper bearing，three frequency components appear in the spectrum diagram and their amplitudes increase，and the formant values of the acceleration response curve increase，while the critical speeds decrease. When the eccentric direction changes and the rotor rotates one circle，the amplitude of frequency components such as rotation frequency，the formant values of the acceleration response curve have obvious periodic changes. © 2024 Science Press. All rights reserved.
引用
收藏
页码：225 / 232
页数：7
相关论文
共 16 条
  • [1] PERERS R, LEIJON M., Saturation effects on unbalanced magnetic pull in a hydroelectric generator with an eccentric rotor［J］, IEEE transactions on magnetics, 43, 10, pp. 3884-3890, (2007)
  • [2] BAI H Y, JING J P，, MENG G., Survey and outlook on the research of the unbalanced magnetic pull in the motors［J］, Noise and vibration control, 29, 6, pp. 5-7, (2009)
  • [3] ZHANG X T, ZHANG B Y, CAO Y P., Force analyze of axial magnetic flux permanent magnet motor under eccentricity condition［J］, Transactions of China Electrotechnical Society, 35, S1, pp. 110-116, (2020)
  • [4] ZUO S G, ZHANG G H，, WU X D, Et al., Analysis of electromagnetic force in wheel- drive PMSM with stator incline eccentricity［J］, Journal of Zhejiang University （engineering science）, 49, 5, pp. 901-907, (2015)
  • [5] LI Y, SUN Y G，, Et al., Characteristic analysis of unbalanced magnetic pull caused by non- salient pole synchronous generator rotor inter- turn short circuit fault ［J］, Automation of electric power systems, 40, 3, pp. 81-89, (2016)
  • [6] GE B J, LU H., Unbalanced radial electromagnetic force on rotor under inter-turn short circuit faults of stator winding ［J］, Proceedings of the CSU-EPSA, 29, 2, pp. 112-120, (2017)
  • [7] DORRELL D G., Sources and characteristics of unbalanced magnetic pull in three-phase cage induction motors with axial-varying rotor eccentricity［J］, IEEE transactions on industry applications, 47, 1, pp. 12-24, (2011)
  • [8] YU L H, XIE Q S, LI S B, Et al., The analysis of the dynamics of high speed motorized spindle with the externally pressurized gas bearing considering unbalanced magnetic pull［J］, Mechanical science and technology for aerospace engineering, 33, 6, pp. 792-795, (2014)
  • [9] KIM H, Et al., Rotordynamic simulation method of induction motors including the effects of unbalanced magnetic pull［J］, IEEE access, 8, pp. 21631-21643, (2020)
  • [10] YAO D K, HUANG W H，, Et al., Nonlinear electromagnetic vibrations in hydro- generators with eccentric rotors［J］, Chinese journal of applied mechanics, 23, 3, pp. 334-337
12