Influence of mechanical and water-jet cutting on the dynamic magnetic properties of NO Fe-Si steels

Paltanea, Veronica Manescu; Păltânea, Gheorghe; Ferrara, E.; Nemoianu, Iosif Vasile; Fiorillo, F.; Gavrilǎ, Horia

doi:10.1016/j.jmmm.2019.166257

Cited by 17 publications

(28 citation statements)

References 24 publications

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“…If we consider the M400-65A electrical steel, at peak magnetic polarization of 1 T and measuring frequency of 50 Hz, the total energy loss in the case of the water-jet cut sample is 32.88 mJ/kg and for the laser cut strips it increases to 41.79 mJ/kg. The chemical composition of the alloy is a key element, because by slightly modifying its constituents, the total energy loss could be reduced, and the magnetic permeability The width of the damaged zone was estimated to be between (3.5 ÷ 4.2) mm in the case of punching and (3 ÷ 3.4) mm for water-jet cut method [45][46][47], with higher values in the case of M400 steels, fact which determines a decrease of the relative magnetic permeability modulus.…”

Section: Discussionmentioning

confidence: 99%

“…This fact can be correlated with the increased strain hardening phenomena that appears during mechanical cutting for increased sample thickness. The width of the damaged zone was estimated to be between (3.5 ÷ 4.2) mm in the case of punching and (3 ÷ 3.4) mm for water-jet cut method [45][46][47], with higher values in the case of M400 steels, fact which determines a decrease of the relative magnetic permeability modulus.…”

Section: Sample Grade [µM]mentioning

confidence: 98%

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Correlation between Magnetic Properties and Chemical Composition of Non-Oriented Electrical Steels Cut through Different Technologies

et al. 2020

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Due to worldwide regulations on electric motor manufacturing, the energy efficiency of these devices has to be constantly improved. A solution may reside in the fact that high quality materials and adequate cutting technologies should be carefully chosen. The magnetic properties of non-oriented electrical steels are affected by the cutting methods, through induced plastic, and thermal stresses. There is also an important correlation between chemical composition and different magnetic properties. In this paper, we analyze different industrial grades of non-oriented electrical steels, used in electrical machines’ core manufacturing as M800-65A, M800-50A, M400-65A, M400-50A, M300-35A, and NO20. The influence of the cutting methods on the normal magnetization curve, total energy loss and its components, and relative magnetic permeability is investigated in alternating currents using a laboratory single sheet tester. The chemical composition and grain size influence are analyzed and correlated with the magnetic properties. Special attention is devoted to the influence of the increased cutting perimeter on the energy losses and to the way it relates to each chemical alloy constituent. The final decision in what concerns the choice of the proper magnetic material and the specific cutting technology for the motor magnetic cores is imposed by the desired efficiency class and the specific industrial applications.

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Section: Discussionmentioning

confidence: 99%

Section: Sample Grade [µM]mentioning

confidence: 98%

Correlation between Magnetic Properties and Chemical Composition of Non-Oriented Electrical Steels Cut through Different Technologies

et al. 2020

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“…The papers [70,71] examined non-oriented sheets with a width of 0.2 and 0.35 mm and a width of 5 to 60 mm in a wide frequency range. Based on experimental tests, the width of the degraded zone was determined to equal: for a sheet of 0.2 mm thickness, 1.739 mm and a sheet of 0.35 mm thickness, 2.044 mm.…”

Section: Simulation Models Of Changes In Electromagnetic Properties C...mentioning

confidence: 99%

“…Based on experimental tests, the width of the degraded zone was determined to equal: for a sheet of 0.2 mm thickness, 1.739 mm and a sheet of 0.35 mm thickness, 2.044 mm. In paper [71], tests were also carried out for sheets cut using a water jet, and although this method of cutting is considered the least invasive, the width of such a zone was determined to be 1.5 mm. However, it should be noted that such a significant width of the damaged zone is not confirmed in other works.…”

Section: Simulation Models Of Changes In Electromagnetic Properties C...mentioning

confidence: 99%

The Influence of Cutting Technology on Magnetic Properties of Non-Oriented Electrical Steel—Review State of the Art

2023

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The global drive to reduce energy consumption poses new challenges for designers of electrical machines. Losses in the core are a significant part of losses, especially for machines operating at an increased rotational speed powered by PWM inverters. One of the important problems when calculating core losses is considering the effect of material degradation due to mechanical or laser cutting. To this aim, this paper analyzes and summarizes the knowledge about the sources of material property deterioration and ways of describing this phenomenon. The cited results of material tests indicate the lack of unequivocal relationships allowing us to estimate the degree of material damage and the resulting deterioration of material properties. The main task of this article is to present the state of knowledge on the possibility of taking into account the impact of cutting the core sheets of electric motors on core losses and their impact on the efficiency of the machine. This is a significant problem due to the need to design and manufacture energy-saving electric motors powered with a voltage of 20 to 350 Hz, whose magnetic cores are made of laminates. However, the performed analysis indicates the most important parameters of the cutting process, affecting the degree of material structure destruction. The method of the solution proposed by the authors for core punching and laser cutting, illustrated with a practical example, is also presented.

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“…The conducted research mainly concerns the impact of mechanical cutting, while there are relatively few deepened studies on the effect of laser cutting [12][13][14][15]. In addition, a small group of research on the estimation of local material properties can be identified, based on the results of macroscopic examinations [12,[16][17][18]. In turn, other researchers deal with the observations at the level of the internal structure of the material, showing its changes resulting from the cutting technology used [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Investigation of local properties of the Fe-Si alloy subjected to mechanical and laser cutting

2024

Archives of Electrical Engineering

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The effective design of energy-saving electric motors with efficiency class IE4 and higher requires the use of material characteristics that take into account the core shaping process. Therefore, it becomes necessary to use analytical or numerical models that take into account the change of local properties of Fe-Si material. The aim of the work is to indicate a useful analytical model for estimating the local magnetic permeability of the material, as well as to understand the reasons for these changes. For this purpose, low-loss ferromagnetic materials cut with a guillotine and a laser were tested. Rectangular samples, cut at an angle of 0 degrees in relation to the rolling direction, were subjected to macroscopic and microscopic examinations. Finally, the main reasons for changes in material characteristics for both cutting technologies were indicated. Therefore, the proposed model takes into account not only the cutting technology used, but also the current width of the tested strip, for which the material characteristics are to be determined. The parameters of the analytical model are determined on the basis of a limited number of measurements carried out on samples of a simple geometric shape.

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Influence of mechanical and water-jet cutting on the dynamic magnetic properties of NO Fe-Si steels

Cited by 17 publications

References 24 publications

Correlation between Magnetic Properties and Chemical Composition of Non-Oriented Electrical Steels Cut through Different Technologies

Correlation between Magnetic Properties and Chemical Composition of Non-Oriented Electrical Steels Cut through Different Technologies

The Influence of Cutting Technology on Magnetic Properties of Non-Oriented Electrical Steel—Review State of the Art

Investigation of local properties of the Fe-Si alloy subjected to mechanical and laser cutting

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