A method of local magnetic loss determination in punched ferromagnetic strips

Gmyrek, Zbigniew; Strąkowska, M.; Więcek, B.

doi:10.1016/j.jmmm.2013.12.035

Cited by 15 publications

(9 citation statements)

References 20 publications

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“…At the beginning we were trying to compare the temperature in the arbitrary chosen points to adjust the power density distribution in the strip. It did not give the satisfactory results, that were already published the literature [1][2][3][4][5][6]. We were trying the different sets of points located in different places on the strip.…”

Section: Resultsmentioning

confidence: 99%

“…Convection was modelled using heat transfer coefficient ht = h1 + h2 which was constant but different for both sides of the strip. The model takes a form [6] …”

Section: Analytical 1d Thermal Models In Frequency Domainmentioning

confidence: 99%

“…the needle probe method [4] (measuring needles absorb a portion of the heat generated in the area) or microhardness measurement method [5] (introducing additional microstrains in the structure). The authors of this paper show that it is possible to use IR camera to record the local temperature rise in the punched area, and then by using the analytical or/and numerical thermal modeling can determine the density distribution of power loss in the zone near the cut edge of the ferromagnetic strip [6]. Two mathematical heat transfer models describing the dynamic thermal problem in a ferromagnetic strip were used to find the distribution of heat generation in a strip.…”

Section: Introductionmentioning

confidence: 99%

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Application of IR thermography for thermal inverse modelling to evaluate the local power loss in punched ferromagnetic strips

Strąkowska¹,

Gmyrek²,

Więcek³

2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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The authors deal with the problem of determining the local properties of ferromagnetic material subjected to mechanical cutting. They use a IR camera to record local temperature rise in the punched region. Next, the temperature measured is used in the numerical models that allow estimation of the power loss density distribution. A simple inverse thermal model for a ferromagnetic strip with non-uniform power loss are presented. The correctness of the results obtained from the simple inverse model is verified using the 3D thermal finite element model (FEM) and compared with the measurement results.

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Section: Resultsmentioning

confidence: 99%

“…Convection was modelled using heat transfer coefficient ht = h1 + h2 which was constant but different for both sides of the strip. The model takes a form [6] …”

Section: Analytical 1d Thermal Models In Frequency Domainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of IR thermography for thermal inverse modelling to evaluate the local power loss in punched ferromagnetic strips

Strąkowska¹,

Gmyrek²,

Więcek³

2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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“…For partially damaged material, the curves representing the magnetic material, available in the catalogues, can no longer be used. This remark is especially significant for grainoriented magnetic materials, in which there is a very large increase in hysteresis loss resulting from cutting (see [15]). In addition, cutting causes deformation of the lateral surface of the strip bar, as shown in [13].…”

Section: Conception Of the Sst With Variable Dimensionsmentioning

confidence: 99%

Single Sheet Tester With Variable Dimensions

Gmyrek

2016

IEEE Trans. Instrum. Meas.

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This paper presents a new concept of the single sheet tester (SST) with variable dimensions. First, the author points out standards specifying requirements for systems, that allow to determine the properties of soft magnetic materials. Then, the concept of the SST system and its calibration are described in detail. Calibration of the system was carried out both by performing additional measurements as well as by Finite Element Method (FEM) modeling and execution of numerical simulation. Using the described measuring system, the measurements of two grain-oriented magnetic materials cut at an angle of 0°and 90°with respect to the rolling directions, were executed. The results of the measurements were compared with results obtained from the Epstein frame (carried out in accordance with the International Electrotechnical Commission international standard). Moreover, the author refers to other SST systems having nonstandard dimensions.

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“…The magnetic properties of the electrical steel sheet deteriorate in constructed cores due to the stressed conditions caused by riveting and welding during manufacturing process, punching and shearing in cutting process of the electrical steel sheets and so on [1]. In specially, the residual stress, which is occurred during the manufacturing process is considered as a factor of the deterioration of the magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Low loss of a permanent magnet motor by applying local stress

Yang

Enokizono

2014

2014 International Conference on Electrical Machines (ICEM)

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We have been reported measured results for magnetic properties of a non-oriented electrical steel sheet under various magnetic flux and stress conditions and a new vector magnetic characteristic analysis technique in order to consider the stress effect on magnetic properties in the motor core. Next, we try to control the vector magnetic properties of non-oriented electrical steel sheets by applying the stress. In this paper, the effect of the stress on the vector magnetic properties of the non-oriented electrical steel sheet and permanent magnet motor is examined. At first, the effect of the stress of the caulking on the vector magnetic properties and residuals stress distribution are measured. Next, the assumed stress distribution is applied to the local part of a stator core, and the vector magnetic characteristic analysis is performed by using stress-complex E&S modeling. From these results, the loci of the magnetic field strength vector and the magnetic power loss decreased by applying the stress.

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A method of local magnetic loss determination in punched ferromagnetic strips

Cited by 15 publications

References 20 publications

Application of IR thermography for thermal inverse modelling to evaluate the local power loss in punched ferromagnetic strips

Application of IR thermography for thermal inverse modelling to evaluate the local power loss in punched ferromagnetic strips

Single Sheet Tester With Variable Dimensions

Low loss of a permanent magnet motor by applying local stress

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