Induction Probe for Measuring Magnetic Losses in a Traveling Strip of Electrical Steel

2003 ◽  
Vol 39 (7) ◽  
pp. 559-562
Author(s):  
V. F. Tiunov
Keyword(s):  
Electrical Steel ◽  
Magnetic Losses

Study on Influence of Microstructure and Thermal Treatment on Magnetic Losses from Non-Oriented Silicon Electrical Steel

2017 ◽  
Vol 15 (13) ◽  
pp. 12-17
Author(s):  
Elena Valentina Stoian ◽  
Maria Cristiana Enescu ◽  
Vasile Bratu ◽  
Carmen Otilia Rusanescu ◽  
Florina Violeta Anghelina
Keyword(s):  
Magnetic Properties ◽  
Electrical Steel ◽  
Aging Treatment ◽  
Magnetic Characteristics ◽  
Magnetic Losses ◽  
Current Frequency ◽  
Steel Sheets ◽  
Wide Range ◽  
Steel Processing ◽  
Hot Rolled

AbstractNon/oriented electrical sheets are sheets tailored to produce specific properties and are produced from Fe-Si or Fe-Si-Al alloys. Non-oriented electrical steel sheets are incorporated into a wide range of equipment, from the simplest domestic appliances to hybrid and pure electric vehicles. In studying about the magnetic, there have a lot of method can be used for the different experiment requirement such as measuring magnetic flux, nominal loss and other objectives.During electrical steel processing, there are usually small variations in both chemical composition and thickness in the hot-rolled material that may lead to different magnetic properties for the same steel grade. Therefore, it is of great importance to know the effects of such variations on the final microstructure and magnetic properties of these steels. The purpose of this work was to study microstructural changes of the bands investigated during processing occurring siliceous strips with non-oriented grains. The second aim was to study the influence of grain size on the total magnetic losses at 1.0 T and 1.5 T. Materials 10 rolls intended to be processed into quality electrical steel M400-50A (according to EN 100027-1) were analyzed with metallographic microscope Neophet 32 and the magnetic characteristics was made with Epstein frame according IEC 6040/4-2, with an exiting current frequency of 50Hz at 1.5T and 1.0T induction after aging treatment of 225°C for 24 hours. Sample for light microscopy observation were prepared by polishing and etching in 5% Nital.

Influence of normalization on the magnetic properties of electrical steel with superlow magnetic losses

2016 ◽  
Vol 46 (7) ◽  
pp. 520-524
Author(s):  
A. E. Cheglov ◽  
A. K. Pogodaev ◽  
V. S. Yusupov ◽  
S. V. Bakhtin ◽  
D. V. Barybin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Electrical Steel ◽  
Magnetic Losses

The Effects of Chromium-Free Insulating Coating on the Magnetic Properties in Grain-Oriented Electrical Steel

2013 ◽  
Vol 813 ◽  
pp. 100-103
Author(s):  
Ting Liu ◽  
Zhong Han Luo ◽  
Jiong Hui Mao ◽  
Hao Yang ◽  
Shou Tian Hu
Keyword(s):  
Magnetic Properties ◽  
Magnetic Property ◽  
Tensile Stress ◽  
Electrical Steel ◽  
Magnetic Losses ◽  
Environment Friendly ◽  
Tensile Stresses

A kind of environment-friendly Cr-free insulating coating for grain-oriented electrical steel is exhibited in this paper. The tensile stress and the magnetic properties for both Cr-free and Cr-containing insulating coating were measured. The results showed that the more the coating on the metal, the bigger the tensile stress produced. The contribution of the Cr-free insulating coating to the reduction in P1.7/50 varies from 0.092 to 0.192 W/kg, while the reduction in P1.7/50 by the Cr-containing insulating coating is from 0.066 to 0.177 W/kg, with the weight of the coating varies from 4 to 6.5 g/m2. In comparison with the traditional Cr-containing insulating coating, the Cr-free coating produces larger tensile stresses in the metal, thus leads to better magnetic properties, especially in the magnetic losses. Keywords: grain-oriented electrical steel, insulating coating, Chromium-free, magnetic property, tensile stress

Method for determining of the optimal thickness of sheets of magnetic cores of electrical machines by the wattmeter method

Metrologiya ◽  
2021 ◽  
pp. 35-47
Author(s):  
S. M. Plotnikov
Keyword(s):  
Electrical Steel ◽  
Magnetic Circuit ◽  
Electric Machine ◽  
Electrical Machines ◽  
Magnetic Losses ◽  
Optimal Thickness ◽  
Steel Sheets ◽  
Magnetic Circuits ◽  
Magnetic Cores ◽  
Anisotropic Steel

The problem of reducing magnetic losses (no-load losses) in the steel of the magnetic cores of electrical machines is investigated. The tasc of determining the optimal thickness of steel sheets of the magnetic circuit of an electric machine is considered. The criterion for optimality is the minimum power of magnetic losses in steel. Currently, this problem does not have an exact solution due to the fact that the exact ratio of the hysteresis and eddy current components of magnetic losses in steel is unknown. Analyzed the power of magnetic losses in modern electrical machines and devices, depending on the thickness of the sheets of electrical steel. A method is proposed for determining the optimal thickness of steel sheets of the magnetic circuit of an electric machine based on the wattmeter method. In the course of the experiment, two identical magnetic circuits were selected from steel sheets of different thicknesses, for which the losses in steel were measured at different frequencies of magnetization reversal and the optimal thickness of the sheets was calculated. The proposed formula for calculating the thickness of the sheets is valid for both isotropic and anisotropic steel. The proposed technique can be used for both transformers and electric motors and generators.

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