Magnetic Properties of Electrical Steel Sheets in Respect of Cutting: Micromagnetic Analysis and Macromagnetic Modeling

Hofmann, Markus; Naumoski, Hristian; Herr, U.; Herzog, Hans-Georg

doi:10.1109/tmag.2015.2484280

Cited by 82 publications

(55 citation statements)

References 33 publications

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“…In the case of laser cut samples, higher field strength is required to reach a certain level of induction. More studies using SST are given in [11] and [12]. In [11], only CO2 laser was investigated with 120 × 120 mm sheet samples, and 4-mm wide samples showed a doubling of the iron losses compared to full-size sample at 1 T, 50 Hz.…”

Section: Literature Reviewmentioning

confidence: 99%

Quantifying Effects of Cutting and Welding on Magnetic Properties of Electrical Steels

Bourchas

Stening

Soulard

et al. 2017

IEEE Trans. on Ind. Applicat.

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Section: Literature Reviewmentioning

confidence: 99%

Quantifying Effects of Cutting and Welding on Magnetic Properties of Electrical Steels

Bourchas

Stening

Soulard

et al. 2017

IEEE Trans. on Ind. Applicat.

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“…In order to practically cope with this problem, the conventional guillotine punching is often substituted by the time consuming water cutting or spark erosion methods. We see in Figure 7a how Modeling the detrimental effect of cutting on magnetic losses is typically pursued through phenomenological approaches and numerical methods, where the properties of the work-hardened narrow band running along the damaged sheet edges compound with the contribution of the undamaged inner region of the sheet [3,[30][31][32]. By approximating the fall of the magnetization level across the work-hardened bands at the edges of the strip with a step-like function, we assign, for any given field H, the magnetization values J pc to the hardened side bands of width L c and the value J p0 > J pc to the inner region of width w 0 = w − 2L c (see inset of Figure 7b).…”

Section: Strain Hardening By Cuttingmentioning

confidence: 99%

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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“…Electron backscatter diffraction (EBSD), optical microscope [1] and, micro hardness measurements [2] confirm the distortion in the grains of magnetic material near the cut edge. The degradation of magnetic material properties such as magnetic excitation and core losses are further measured by experiments [3], [4]. To include this degradation phenomenon in the electrical machine design process various authors developed associated loss models.…”

Section: Introductionmentioning

confidence: 99%

“…To include this degradation phenomenon in the electrical machine design process various authors developed associated loss models. Researchers have presented analytical loss models [5] as well as finite element based loss models [3], [6], [7]. The effect of the magnetic material degradation in different parts of a machine such as the stator teeth and yoke was considered by building factors [8] or by different magnetization curves [3].…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have presented analytical loss models [5] as well as finite element based loss models [3], [6], [7]. The effect of the magnetic material degradation in different parts of a machine such as the stator teeth and yoke was considered by building factors [8] or by different magnetization curves [3]. Among the finite element based loss models, the effect of degradation is either quantified by a single degraded material layer near the cut edge [9], [10] or by many such layers [6], [7].…”

Section: Introductionmentioning

confidence: 99%

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Mixed-Order Finite-Element Modeling of Magnetic Material Degradation Due to Cutting

et al. 2018

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As a part of manufacturing of electrical machines, electrical sheets are cut to the desired shape by various cutting techniques such as punching, laser cutting etc. This cutting process degrades the magnetic material near the cut-edge which should be included in the finite element modeling of electrical machines. However, due to the nature of the cutting effects, the existing finite element modeling of the cutting effect results in computationally heavy simulations. This paper investigates the application of mixed order elements to model the cutting effect. The second order nodal triangular elements are used near the cut-edge whereas transition/first order elements are applied in the remaining solution domain. Further, the accuracy of the presented method is analyzed with the traditional method. According to the simulations, the mixed order elements returned accurate results significantly faster than the traditional finite element based approaches. Further, the effect of the cutting on the machine performance is also studied by comparing it's results briefly.

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Magnetic Properties of Electrical Steel Sheets in Respect of Cutting: Micromagnetic Analysis and Macromagnetic Modeling

Cited by 82 publications

References 33 publications

Quantifying Effects of Cutting and Welding on Magnetic Properties of Electrical Steels

Quantifying Effects of Cutting and Welding on Magnetic Properties of Electrical Steels

Magnetic Hysteresis and Barkausen Noise in Plastically Deformed Steel Sheets

Mixed-Order Finite-Element Modeling of Magnetic Material Degradation Due to Cutting

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