多频情况下存在绝缘故障的叠片铁心的涡流及涡流损耗的分析

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (880 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract This paper presents a method for analyzing the eddy current fields and resultant losses in the insulation fault zone of laminated iron core which occur the insulated faults. It is based on the finite-element method which uses the three-dimensional magnetic scalar potential magneto dynamic T, ψ-ψ formulation and a newly developed homogenization method is applied to model the laminations with the insulated faults effectively. In order to compute fields at various frequencies, the formulas for the effective skin depths along different directions in the anisotropic solid core are derived, which are accompanied with the adaptively generated finite-element meshes. As an example of application of the method developed above, the eddy current and associated losses in a large asynchronous machine core with insulated faults are computed over a very wide frequency range. The calculations results, based on the homogenization model by introducing anisotropic conductivity and on the direct method involving the actual description of lamination, respectively, are analytical comparison. The results of the comparison display the stator faults analyzed by the continuum model with the anisotropic conductivity can satisfy the actual accuracy requirement at low frequencies.

Key words： Homogenization method eddy current equivalent conductivity interlamination short-circuit finite element method(FEM)

Received: 27 September 2013 Published: 10 April 2015

PACS:

TM343

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Meng Dawei
	Xiao Lijun
	Xu Yongming
	Meng Qingwei

Cite this article:

Meng Dawei,Xiao Lijun,Xu Yongming等. Analysis of Eddy Current and Associated Losses Insulated Faults Involved in Laminated Iron Core Under Various Frequencies[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 92-98.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I6/92

[1] Brauer J R, Cendes Z J, Belboff B C, et al. Laminated steel eddy-current loss versus frequency computed using finite elements[J]. IEEE Transactions on Industry Applications, 2000, 36(4): 1132-1137.
[2] Tavner P J, Anderson A F. Core faults in large generators[J]. IEE Proceedings: Electric Power Applicatios, 2005, 152(6): 1427-1439.
[3] Lee S B, Kliman G B, Shah M R, et al. Experimental study of inter-laminar detection techniques based on low flux core excitation[J]. IEEE Transactions on Energy Conversion, 2006, 21(1): 85-94.
[4] Lee S B, Kliman G B, Shah M R, et al. An advanced technique for detecting inter-laminar stator core faults in large electric machines[J]. IEEE Transactions on Industry Applications, 2005, 41(5): 1185-1193.
[5] Barrera P M dela, Bossio G R, García G O et al. Stator core fault diagnosis for induction motors based on parameters adaptation[C]. IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics & Drives(SDEMPED), 2009: 1-7.
[6] Romary R, Demian C, Schlupp P, et al. Offline and online methods for stator core fault detection in large generators[J]. IEEE Transactions on Industrial Elec- tronics, 2013, 60(9): 4084-4092.
[7] Posedel Z. Inspection of stator cores in large machines with a low yoke induction method-measurement and analysis of interlamiation short-circuits[J]. IEEE Transac- tions on Energy Conversion, 2001. 16(1): 81-86.
[8] Preis K, Bíró O Ti˘car I. FEM analysis of eddy current losses in nonlinear laminated iron cores[J]. IEEE Transactions on Magnetics, 2005, 41(5): 1412- 1415.
[9] Ren Z. Formulation for eddy-current problems in multiply connected regions[J]. IEEE Transactions on Magnetics, 2002, 38(2): 557-560.
[10] Biró O, Preis K, Tiěar I. Voltage-driven coils in finite-element formulations using a current vector and a magnetic scalar potential[J]. IEEE Transactions on Magnetics, 2004, 40(2): 1286-1289.
[11] Albertz D, Henneberger G. Calculation of 3D eddy current fields using both electric and magnetic vector potential in conducting regions[J]. IEEE Transactions on Magnetics, 1998, 34(5): 2644-2647.
[12] Biró O. Edge element formulations of eddy current problems[J]. Computet Methods in Applied Mechanics and Engineering, 1999, 169(3): 391-405.
[13] Silva V C. A 3D Finite-element computation of eddy currents and losses in the stator end laminations of large synchronous machines[J]. IEEE Transactions on Magnetics, 1996, 32(3): 1569-1572.
[14] Li G P, Biró O. Complex representation in nonlinear time harmonic eddy current problems[J]. IEEE Transac- tions on Magnetics, 1998, 34(5): 2625- 2628.
[15] Bermúdez A, Gómez D, Salgado P. Eddy current in laminated cores and the computation of an equivalent conductivity[J]. IEEE Transactions on Magnetics, 2008, 44(12): 4730-4738.
[16] Hahne P, Dietz R, Rieth B, et al. Determination of anisotropic equivalent conductivity of laminated cores for numerical computation[J]. IEEE Transactions on Magnetics, 1996, 32(3): 1184-1187.
[17] Gollee R, Gelach G. An FEM-based method for analysis of the dynamic behavior of AC contactors[J]. IEEE Transactions on Magnetics, 2000, 36(4): 1337-1340.
[18] Wang J, Lin H, Huang Y, et al. A new formulation of anisotropic equivalent conductivity in laminations[J]. IEEE Transactions on Magnetics, 2011, 47(5): 1378- 1381.
[19] Silva V C, Meunier G, Foggia A. A 3-D finite computation of eddy currents and losses in laminated iron cores allowing for electric and magnetic anisotropic [J]. IEEE Transactions on Magnetics, 1995, 31(3): 2139-2141.
[20] Sebeatyén I, Gyimóthy S, Pávó J, et al. Calculation of losses in lmainted ferromagnetic materials[J]. IEEE Transactions on Magnetics, 2004, 40(2): 924-927.
[21] Muramatsu K, Okitsu T, Fujitsu H, et al. Method of nonlinear magnetic field analysis taking into account eddy current in laminated core[J]. IEEE Transactions on Magnetics, 2004, 40(2): 896-899.
[22] Ridley G K. Electromagnetic field distortion effects on ELCID tests[C]. Electrical Machines and Drives, 1995: 187-193.