Dimensional Effects on Magnetic Properties of Fe&amp;#x2013;Si Steels Due to Laser and Mechanical Cutting

Araujo, Edgar Gomes de; Schneider, J.; Verbeken, Kim; Pasquarella, Giuseppe; Houbaert, Yván

doi:10.1109/tmag.2009.2034124

Cited by 84 publications

(33 citation statements)

References 10 publications

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“…Electrical machines are generally made from the sheets that are produced by punching, but sometimes laser cutting is used for prototype or very small series of machines. Each of this type of processing influences magnetic properties of material [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties and Structure of Non-Oriented Electrical Steel Sheets after Different Shape Processing

et al. 2017

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Non-oriented electrical steel sheets are the most often used materials in electrical rotary machines. Raw sheets must be formatted by various methods, e.g., punching, laser, spark or water stream cutting. Basic parameters of magnetic, electrical, and mechanical properties of the sheets are usually obtained from the producer, but namely magnetic properties are changed in dependence on additional machining processes. The aim of this study is to describe changes in magnetic properties after punching, laser or spark cutting of the original sheets M470-50A. The basic information about the structure of the cut edges of samples was obtained by optical microscopy and scanning electron microscopy. For the magnetic measurements toroidal samples were prepared by the mentioned technologies. The magnetic parameters were yielded from the measuring of magnetic hysteresis loops in dependence on saturation fields. The results are discussed from the point of view of applied cutting methods with the aim to obtain the best magnetic parameters and consequently determining the depth of the influenced material. After laser cutting, important decrease in remanence and increase in total losses were observed in comparison with the punched samples.

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Section: Introductionmentioning

confidence: 99%

Magnetic Properties and Structure of Non-Oriented Electrical Steel Sheets after Different Shape Processing

et al. 2017

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“…The area of the increase in hardness indicates the region of plastic deformation, and the distance of the increase in hardness from the edge is considered to reflect the region where the magnetic properties are deteriorated (17) (18) . Therefore, the thinner materials have a smaller strained area and less iron loss deterioration by the shearing process.…”

Section: Results Of Iron Loss Deteriorationmentioning

confidence: 99%

Iron Loss Deterioration by Shearing Process in Non-Oriented Electrical Steel with Different Thicknesses and Its Influence on Estimation of Motor Iron Loss

Toda¹,

Zaizen²,

Namikawa³

et al. 2014

IEEJ Journal IA

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The influence of the shearing process on the iron loss of non-oriented electrical steels with thicknesses of 0.20-0.50 mm was investigated. The deterioration of material iron loss was lesser in thinner steel sheets. The distribution of the increase in hardness near the sheared edge was almost half of the sheet thickness for all tested steels. Therefore, applying thinner steel sheets for the motor core may decrease the iron loss deterioration from the punching process. This argument was supported by measuring the iron loss of a model IPMSM using steels with different thicknesses and calculating the motor iron loss through FE analysis. The magnetic properties of narrow pieces corresponding to the width of the motor's teeth and yoke were shown to be important and useful to estimating the motor iron loss more accurately.

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“…To solve (1) using finite element method (FEM), the unknown vector potential A is discretized as follows: (2) where N i is the scalar interpolation function, n is the number of nodal points. By applying the Galerkin method to (1), we obtain the FE equation (3) is expressed in the matrix form Ka=b, where K, a and b denote the FE matrix which is symmetric and sparse, unknown and source vectors, respectively.…”

Section: Optimization Methodsmentioning

confidence: 99%

“…t has been pointed out that there can exist significant magnetic degradation in the magnetic materials used in electric machines [1][2][3]. They are attributed to thermal and kinetic stresses in punching, shrinking fitting and other manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Robust Optimization Considering Probabilistic Magnetic Degradation

2015

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This paper presents robust topology optimization of electromagnetic machines taking account of magnetic degradation caused by mechanical and thermal stresses in punching, shrinking fitting and other manufacturing processes. The topology optimization is performed using two methods; one is the robust genetic algorithm in which random noises are added to the magnetic-characteristic parameters, and another takes the deviations in the objective and constraint functions due to the degradation into account. These methods are applied to optimization of the flux barrier shapes in an IPM motor to find that one can successfully realize robust design.

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Dimensional Effects on Magnetic Properties of Fe–Si Steels Due to Laser and Mechanical Cutting

Cited by 84 publications

References 10 publications

Magnetic Properties and Structure of Non-Oriented Electrical Steel Sheets after Different Shape Processing

Magnetic Properties and Structure of Non-Oriented Electrical Steel Sheets after Different Shape Processing

Iron Loss Deterioration by Shearing Process in Non-Oriented Electrical Steel with Different Thicknesses and Its Influence on Estimation of Motor Iron Loss

Robust Optimization Considering Probabilistic Magnetic Degradation

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