Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

Calculation and measurement of unbalanced magnetic pull in cage induction motors with eccentric rotors. Part 1: Analytical model

Calculation and measurement of unbalanced magnetic pull in cage induction motors with eccentric rotors. Part 1: Analytical model

For access to this article, please select a purchase option:

Buy article PDF
£12.50
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IEE Proceedings - Electric Power Applications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The paper describes an analytical model for cage induction motors with a static eccentric rotor. The method is based on an airgap permeance approach including stator and rotor MMF harmonics. The stator windings are resolved into harmonic conductor density distributions that allow different series/parallel winding connections to be accommodated in a straightforward manner. Sinusoidal and homopolar airgap field components are identified and the total airgap field distribution is used to determine the radial forces on the rotor. The model examines the principal harmonic interactions that influence the unbalanced magnetic pull.

References

    1. 1)
      • von Kaehne, P.: `Unbalanced magnetic pull in rotating electrical machines.Survey of published work', ERA Report, 1963, ref: Z/T 142.
    2. 2)
      • R. Belmans , W. Geysen , H. Jordan , A. Vandenput . Unbalanced magnetic pull and homopolar flux in three-phase inductionmotors witheccentric rotors. ICEM , 916 - 921
    3. 3)
      • V.W. Schuisky . Magnetic pull in electrical machines due to eccentricity of the rotor. Elektrotech. Masch.ball , 391 - 399
    4. 4)
      • M.J. DeBortola , S.J. Salon , D.W. Burrow , C.J. Slavik . Effect of rotor eccentricity and parallel windings on induction machinebehaviour:a study using finite element analysis. IEEE Trans. , 2 , 1676 - 1682
    5. 5)
      • R. Belmans , A. Vandenput , W. Geysen . Influence of unbalanced magnetic pull on the radial stability of flexible-shaftinduction machines. IEE Proc. B , 2 , 101 - 109
    6. 6)
      • R. Belmans , A. Vandenput , W. Geysen . Calculation of the flux density and the unbalanced pull in two-pole inductionmachines. Arch. Elektrotech. , 151 - 161
    7. 7)
      • E. Rosenberg . Magnetic pull in electric machines. Trans. Am. IEE , 1425 - 1469
    8. 8)
      • Dorrell, D.G.: `Calculation of unbalanced magnetic pull in cage induction machines', 1993, PhD, University of Cambridge.
    9. 9)
      • D.G. Dorrell , A.C. Smith . Calculation of UMP in induction motors with series or parallel windingconnections. IEEE Trans. , 2 , 304 - 311
    10. 10)
      • S. Salon , M. DeBortola , D. Burrow , C. Slavik . Calculation of circulating current between parallel windings in inductionmotors with eccentricrotors by the finite element method. ICEM , 371 - 375
    11. 11)
      • J. Fruchtenicht , H. Jordan , H.O. Seinsch . Running instability of cage induction motors caused by harmonic fieldsdue to eccentricity.Part 1: Electromagnetic spring constant and electromagnetic damping coefficient;Part 2: Self-excited transverse vibration of the rotor. Arch. Elektrotech. , 271 - 292
    12. 12)
      • E.W. Summers . Vibration in 2-pole induction motors related to slip frequency. Trans. Am. IEE , 69 - 72
    13. 13)
      • S. Williamson . Power-factor improvement in cage-rotor induction motors. IEE Proc. B , 2 , 121 - 129
    14. 14)
      • M. Bradford . Unbalanced magnetic pull in a 6-pole induction motor. IEE Proc. B , 11 , 1619 - 1627
    15. 15)
      • Belmans, R., Geysen, W., Jordan, H., Vandenput, A.: `Unbalanced magnetic pull in three-phase two-pole motors with eccentricrotor', Proceedings of international conference on Electrical machines– design and application, 1982, London, p. 65–69.
    16. 16)
      • M.M. Liwschitz-Garik . Computation of skin effect in bars of squirrel-cage rotors. Trans. Am. IEE , 768 - 771
    17. 17)
      • H. Haase , H. Jordan , K.P. Kovacs . Vibratory forces as a result of shaft fluxes with two-pole inductionmachines. Elektrotech (ETZ) , 485 - 486
    18. 18)
      • S. Williamson , E.R. Laithwaite . Generalised harmonic analysis for the steady-state performance of sinusoidally-excited cage induction motors. IEE Proc. B , 3 , 157 - 163
    19. 19)
      • S. Williamson , A.C. Smith . Steady-state analysis of 3-phase cage motors with rotor-barand end-ring faults. IEE Proc. B , 3 , 93 - 100
    20. 20)
      • S. Williamson , H. Mirzoian . Analysis of cage induction motors with stator winding faults. IEEE Trans. , 1838 - 1842
    21. 21)
      • H. Frohne . The practical importance of unbalanced magnetic pull, possibilitiesof calculating and damping it. Conti Elektro Berichte , 81 - 92
    22. 22)
      • S. Williamson , A.C. Smith . Field analysis for rotating induction machines and its relationship to the equivalent-circuit method. IEE Proc. B , 2 , 83 - 90
    23. 23)
      • H. Jordan , G. Roder , M. Weis . Under what circumstances may mechanical vibrations of the stator corebe expectedat supply frequency in four-pole three-phase asynchronous machines?. Elecktrie , 3 , 91 - 95
    24. 24)
      • W. Freise , H. Jordan . Unbalanced magnetic pull in 3-phase a.c. machines. ETZ , 9 , 299 - 303
    25. 25)
      • K.J. Binns , M. Dye . Identification of principal factors causing unbalanced magnetic pullin cage induction motors. Proc. IEE , 349 - 354
    26. 26)
      • S. Williamson , M.A.S. Abdel-Magied . Steady-state analysis of double-cage induction motors with rotor-cagefaults. IEE Proc. B , 199 - 206
    27. 27)
      • S. Williamson , N.K. Adams . Cage induction motors with inter-rings. IEE Proc. B , 6 , 263 - 274
    28. 28)
      • K.P. Kovacs . Two-pole induction-motor vibrations caused by homopolar alternating fluxes. IEEE Trans. , 1105 - 1108
http://iet.metastore.ingenta.com/content/journals/10.1049/ip-epa_19960155
Loading

Related content

content/journals/10.1049/ip-epa_19960155
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address