Estimation of the Magnetic Properties of the Damaged Area Resulting From the Punching Process: Experimental Research and FEM Modeling

Gmyrek, Zbigniew; Cavagnino, Andrea; Ferraris, Luca

doi:10.1109/tia.2013.2261041

Cited by 75 publications

(28 citation statements)

References 24 publications

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“…This is in line with the publications about the annealing effect on SiFe lamination sheets, where the hysteresis losses are significantly reduced after the annealing process [47], [48]. The annealing process relieves mainly the imposed stress from cutting and punching the material, but the magnetic grains are also growing during this process [49]. Both mentioned factors influence basically only the hysteresis losses, as it is also shown in Table II.…”

Section: Treatment Of Laminated Materialssupporting

confidence: 87%

Magnetic Materials Used in Electrical Machines: A Comparison and Selection Guide for Early Machine Design

Krings

Cossale

Tenconi

et al. 2017

IEEE Ind. Appl. Mag.

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Copies of full items can be used for personal research or study, educational, or not-for profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way.Publisher's statement: "© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works." A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. Abstract -This article presents an up-to-date magnetic material investigation and overview on magnetic materials used in rotating electrical machines. The focus is on small to medium-sized high-performance and high-efficiency permanent-magnet and induction motors for different application scenarios. The investigated materials include fully processed silicon-iron, nickeliron, and cobalt-iron lamination steels, as well as soft magnetic composites and amorphous magnetic materials. The technical focus of the article is on the magnetic properties and iron losses as well as the manufacturing influence and required thermal treatments during the manufacturing process. A new loss to flux density factor is introduced to compare the characteristic B H magnetization curve and the iron losses of different materials within the same diagram. The aim of the article is to give the machine designer an efficient material overview and selection guide during the early machine design process.

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Section: Treatment Of Laminated Materialssupporting

confidence: 87%

Magnetic Materials Used in Electrical Machines: A Comparison and Selection Guide for Early Machine Design

Krings

Cossale

Tenconi

et al. 2017

IEEE Ind. Appl. Mag.

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“…In literature, the variations in the material properties and core loss due to the manufacturing process on the stator core are investigated in [3][4][5][6][7][8][9][10][11][12][13]. However, there is a very small amount of literature that considers the effect of machining processes on the actual machine performance.…”

Section: Materials and Manufacturing Effects On Machine Designmentioning

confidence: 99%

“…It is well known [3][4][5][6][7][8][9][10][11][12][13] that these manufacturing processes all have a significant and permanent effect on the magnetic properties of the material, especially on the BH curve and the specific core loss properties of the material. This implies that the materials being used for the actual machine no longer reflect the material properties given by their original data sheets.…”

Section: Introductionmentioning

confidence: 99%

Considerations on the Effects That Core Material Machining Has on an Electrical Machine's Performance

Al-Timimy

Vakil

Degano

et al. 2018

IEEE Trans. Energy Convers.

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Abstract--An often-overlooked aspect during the development process of electrical machines, is the validity and accuracy of the machine material properties being used at the design stage. Designers usually consider the data provided by the materials supplier, which is measured on material in an unprocessed state. However, the fact that the machining processes required to produce the finished product (e.g. the stator core) can permanently vary the material properties is very often neglected. This paper therefore deals with and investigates the effects that such processes can have on the overall machine performance. To do this, three sets of material data, based on 1) the materials suppliers' data, 2) materials data based on conventional characterization methods and 3) materials data based on test samples that include the manufacturing processes, are used to develop three versions of the same baseline machine. The results of these three machines are then compared and the resulting variations of the machine's performance presented and described.The chosen baseline machine is a high performance and relatively high speed, aerospace, electrical machine. Special attention is focused on the efficiency maps of the machine as this aspect is highly dependent on the material properties that are the most sensitive to manufacturing processes such as the material's anhysteretic BH curve and its specific core loss.Index Terms--magnetic materials, manufacturing processes, performance analysis, permanent magnet motors.

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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%

“…By measuring the magnetization curve at two strip widths, one can derive the quantities J p0 and (J p0 − J pc ) L c as a function of H. We then obtain a family of curves for a convenient number of H values, which describe the dependence of J p on w, until the minimum width 2L c . The overall behavior of these curves permits one to estimate L c , which is typically of the order of 1-3 mm, depending on the cutting method [3,33]. Using then the same simplifying scheme leading to Equation (2), we write for the hysteresis loss W h at given J p value…”

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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Estimation of the Magnetic Properties of the Damaged Area Resulting From the Punching Process: Experimental Research and FEM Modeling

Cited by 75 publications

References 24 publications

Magnetic Materials Used in Electrical Machines: A Comparison and Selection Guide for Early Machine Design

Magnetic Materials Used in Electrical Machines: A Comparison and Selection Guide for Early Machine Design

Considerations on the Effects That Core Material Machining Has on an Electrical Machine's Performance

Magnetic Hysteresis and Barkausen Noise in Plastically Deformed Steel Sheets

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