Influence of the mechanical fatigue progress on the magnetic properties of electrical steel sheets

Open access

Abstract

The purpose of this paper is to study the variation of the magnetic properties of non-oriented electrical steel sheets with the fatigue state during cyclic mechanical loading. The obtained results are central to the design of variable drives such as traction drives in electric vehicles in which varying mechanical loads, e.g. in the rotor core (centrifugal forces), alter the magnetic properties. Specimens of non-oriented electrical steel are subject to a cyclically varying mechanical tensile stress with different stress amplitudes and number of cycles. The specimens are characterised magnetically at different fatigue states for different magnetic flux densities and magnetising frequencies. The measurements show a variation in magnetic properties depending on the number of cycles and stress magnitude which can be explained by changes in the material structure due to a beginning mechanical fatigue process. The studied effect is critical for the estimation of the impact of mechanical material fatigue on the operational behaviour of electrical machines. Particularly in electrical machines with a higher speed where the rotor is stressed by high centrifugal forces, material fatigue occurs and can lead to deterioration of the rotor’s stack lamination.

[1] Leuning N., Steentjes S., Schulte M., Bleck W., Hameyer K., Effect of elastic and plastic tensile mechanical loading on the magnetic properties of NGO electrical steel, Journal of Magnetism and Magnetic Materials, vol. 417, pp. 42-48 (2016).

[2] Permiakov V., Dupré L., Pulnikov A., Melkebeek J., Loss separation and parameters for hysteresis modelling under compressive and tensile stresses, Journal of Magnetism and Magnetic Materials, vol. 272-276, pp. E553-E554 (2004).

[3] Hug E., Evolution of the magnetic domain structure of oriented 3% SiFe sheets with plastic strains, Journal of Materials Science, vol. 30, no. 17, pp. 4417-4424 (1995).

[4] Singh D., Rasilo P., Martin F., Belahcen A., Arkkio A., Effect of Mechanical Stress on Excess Loss of Electrical Steel Sheets, IEEE Transactions on Magnetics, vol. 51, no. 11, pp. 1-4 (2015).

[5] Vanoost D., Steentjes S., Peuteman J., Gielen G., de Gersem H., Pissoort D., Hameyer K., Magnetic hysteresis at the domain scale of a multi-scale material model for magneto-elastic behaviour, Journal of Magnetism and Magnetic Materials, vol. 414, pp. 168-179 (2016).

[6] Devine M.K., Jiles D.C., Hariharan S., Effects of cyclic stress on the magnetic hysteresis parameters of polycrystalline iron, Journal of Magnetism and Magnetic Materials, vol. 104-107, pp. 377- 378 (1992).

[7] Bozorth R.M., Ferromagnetism, IEEE Press; Wiley-Interscience (1993).

[8] Gilanyi A., Morishita K., Sukegawa T., Uesaka M., Miya K., Magnetic nondestructive evaluation of fatigue damage of ferromagnetic steels for nuclear fusion energy systems, Fusion Engineering and Design, vol. 42, no. 1-4, pp. 485-491 (1998).

[9] Radaj D., Ermüdungsfestigkeit: Grundlagen für Leichtbau, Maschinen- und Stahlbau, SpringerVerlag (1995).

[10] Murakami Y., Kodama S., Konuma S., Quantitative evaluation of effects of non-metallic inclusions on fatigue strength of high strength steels. I: Basic fatigue mechanism and evaluation of correlation between the fatigue fracture stress and the size and location of non-metallic inclusions, International Journal of Fatigue, vol. 11, no. 5, pp. 291-298 (1989).

[11] Testing of materials; fatigue test (Woehlertest); definitions, symbols, execution, evaluation, DIN 50100:1978-02 (1978).

[12] Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892- 1:2009), DIN EN ISO 6892-1:2009-12 (2009).

[13] Magnetic materials - Part 3: Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester (IEC 60404-3:1992 + A1:2002 + A2:2009), DIN IEC 60404-3:2010-05 (2010).

[14] Lo C.C., Tang F., Jiles D.C., Biner S.B., Evaluation of fatigue damage using a magnetic measurement technique, IEEE Transactions on Magnetics, vol. 35, no. 5, pp. 3977-3979 (1999).

[15] Bi Y., Jiles D.C., Dependence of Magnetic Properties on Crack Size in Steels, IEEE Transactions on Magnetics, vol. 34, no. 4, pp. 2021-2023 (1998).

[16] Devine M.K., Kaminski D.A., Sipahi L.B., Jiles D.C., Detection of Fatigue in Structural Steels by Magnetic Property Measurements, Journal of Materials Engineering and Performance, vol. 1, no. 2, pp. 249-253 (1992).

[17] Jiles D.C., Hariharan S., Devine M.K., Magnescope: a portable magnetic inspection system for evaluation of steel structures and components, IEEE Transactions on Magnetics, vol. 26, no. 5, pp. 2577-2579 (1990).

Archives of Electrical Engineering

The Journal of Polish Academy of Sciences

Journal Information


CiteScore 2016: 0.71

SCImago Journal Rank (SJR) 2016: 0.238
Source Normalized Impact per Paper (SNIP) 2016: 0.535

Cited By

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 269 232 20
PDF Downloads 125 105 4