Power losses and magnetization process in Fe–Si non-oriented steels under tensile and compressive stress

Lobue, Martino; Sasso, C.P.; Basso, Vittorio; Fiorillo, F.; Bertotti, G.

doi:10.1016/s0304-8853(00)00092-5

Cited by 89 publications

(48 citation statements)

References 6 publications

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“…A region invested by a longitudinal compressive stress will have its magnetization preferably bound to the easy axes closest to the transverse direction, with obvious detrimental effects on the motion of the domain walls when a longitudinal field is applied. This condition is well illustrated by the experimentally found evolution of the magnetic hysteresis loops of non-oriented Fe-Si sheets under tensile and compressive stresses in the elastic regime, examples of which are shown in Figure 4 [27,28]. Large detrimental effect on the soft magnetic behavior is observed in the compressive regime, where the loops exhibit, in particular, a somewhat bulged shape around the coercive field.…”

Section: Introductionsupporting

confidence: 65%

Magnetic Hysteresis and Barkausen Noise in Plastically Deformed Steel Sheets

Fiorillo

Küpferling

Appino

2017

Metals

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Abstract:The magnetic properties of steels are affected by plastic deformation, because the domain wall processes magnetoelastically interact with the dislocations and the residual stresses. The evolution of the magnetic hysteresis loop and its parameters with the type and degree of straining can thus provide a macroscopic signature of the underlying the mechanical and structural properties. Additional information can be achieved at a microscopic level through analysis of the Barkhausen noise, the signal generated by the stochastic flux variations associated with the discontinuous motion of the domain walls. Nondestructive methods for the structural evaluation of magnetic steels, devoted, in particular, to the investigation of work-hardening and state of internal stress following plastic straining, have therefore been developed in the literature, either through magnetic hysteresis or Barkhausen noise measurements. In this paper, we summarize significant results regarding the relationship between magnetic properties and plastic deformation in steel samples and the related experimental methods. Attention will be devoted, in particular, to the measurement and analysis of the Barkhausen noise spectral density and the way it relates to the macroscopic magnetic behavior and the structural properties.

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Section: Introductionsupporting

confidence: 65%

Magnetic Hysteresis and Barkausen Noise in Plastically Deformed Steel Sheets

Fiorillo

Küpferling

Appino

2017

Metals

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“…The deformation and deviation in the BH-loop of an electrical steel sheet due to stress are evident from various previous studies [1]- [3]. These effects of stress on the material properties, especially on the BH characteristic [4], [5], the iron losses [3], [6], [7] and the vibration [8], [9], are detrimental for an electrical machine [10]- [12].…”

Section: Introductionmentioning

confidence: 80%

“…Nevertheless, measurements in NO Fe-Si single steel sheets under alternative flux density and coaxial applied stress from -35 MPa until 100 MPa demonstrates two phenomena [3], [20]. First is a slight improvement in the permeability at small tensile stresses and the second is the local bowing of the BH loop for high compressive stress and low value of the magnetization [1]. The improvements of SJA model proposed in [24], [25] are not sufficient to model these phenomena.…”

Section: Introductionmentioning

confidence: 98%

Magnetomechanical Model for Hysteresis in Electrical Steel Sheet

et al. 2016

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A coupled magneto-mechanical model for hysteresis in an electrical steel sheet is presented. The foundation of the model developed is the classical Sablik-Jiles-Atherton (SJA) model. A comprehensive model for the stress dependent magnetostriction is also proposed and implemented in the SJA model. Improvements in the SJA model as well, are proposed and validated with simultaneous measurements of magnetostriction, magnetic field and flux density. The measurements were performed on a single electrical steel sheet under various levels of stress (-35 MPa to 100 MPa). The proposed model was found to adequately model the permeability change and the local bowing of the BH-loop due to stress.

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“…Residual stresses' impact on electromagnetic behavior is also dependent on magnetic field strength and frequency [4]. Additionally, the induced residual stress magnitude as well as proportion of tensile and compressive stresses affect the magnetizability of an electrical steel [5,6]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Loss reduction due to blanking parameter optimization for different non-grain oriented electrical steel grades

Weiß

Tröber

Golle

et al. 2017

2017 IEEE International Electric Machines and Drives Conference (IEMDC)

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Abstract-An optimized electrical machine design can improve its efficiency and power density. While magnetic and mechanical design of rotor and stator laminations for varying types of electrical machines is well understood, influence of process induced mechanical stresses on magnetic behavior of non-oriented electrical steel grades is widely unknown. Especially when looking at the blanking process, magnetic properties like iron losses and magnetizability are detrimentally altered due to cutting induced residual stresses. There have been investigations of individual electrical steel grades, which show a significant extent of magnetic property deterioration depending on the process parameters used. This paper studies influences of different blanking process parameters on magnetic properties of various non-oriented electrical steel grades. Several materials with different grain size, silicon content and thickness are investigated. Magnetic properties of processed electrical steel specimens are analyzed using a single sheet tester. The results enable a correlation between material grade, sheet thickness, blanking parameters and magnetic properties to be studied.

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Power losses and magnetization process in Fe–Si non-oriented steels under tensile and compressive stress

Cited by 89 publications

References 6 publications

Magnetic Hysteresis and Barkausen Noise in Plastically Deformed Steel Sheets

Magnetic Hysteresis and Barkausen Noise in Plastically Deformed Steel Sheets

Magnetomechanical Model for Hysteresis in Electrical Steel Sheet

Loss reduction due to blanking parameter optimization for different non-grain oriented electrical steel grades

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