Domain refinement of grain oriented electrical steel with high power laser beam sources

2014 ◽  
Vol 28 (12) ◽  
pp. 1442003 ◽  
Author(s):  
P. Rauscher ◽  
J. Hauptmann ◽  
A. Wetzig ◽  
E. Beyer
Keyword(s):  
Magnetic Properties ◽  
Laser Beam ◽  
Fiber Laser ◽  
High Power ◽  
Electrical Steel ◽  
Laser Energy ◽  
Core Loss ◽  
Core Material ◽  
Beam Source ◽  
Laser Scribing

Laser magnetic domain refinement (LMDR) is applied to reduce the power losses of grain oriented electrical steel, which is used as core material in power or distribution transformers, by generating thermal stress due to the absorbed laser energy. The most widely used laser beam source for the industrial utilization is the CO 2 laser beam source with typical core loss improvements of about 10%. In this paper the dependency of treatment parameters with respect to the magnetic properties of the steel sheets are investigated for the laser scribing process using a high power fiber laser beam source. Especially the treatment properties, which are influenced by the laser beam source, such as focusability, wavelength and absorption behavior, are addressed in this paper. Therefore, single sheets 300 mm × 30 mm × 0.27 mm (high-permeability, comparable to M103-27P) are measured before and after the laser scribing process to evaluate the magnetic properties, as well as the loss components. The analysis has shown that the core loss can be improved by approximately 13% using the fiber laser by scribing invisible lines on the sheet surface.

scholarly journals Influence of Fiber Laser Scribing on Magnetic Domains Structures and Magnetic Properties of NO Electrical Steel Sheets

2020 ◽  
Vol 137 (5) ◽  
pp. 926-929
Author(s):  
V. Puchý ◽  
I. Petryshynets ◽  
F. Kováč ◽  
L. Falat ◽  
M. Podobová ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Fiber Laser ◽  
Electrical Steel ◽  
Magnetic Domains ◽  
Steel Sheets ◽  
Laser Scribing ◽  
Electrical Steel Sheets

The Research of Non-Oriented Electrical Steel Processed by Stress Relief Annealing Experiments

2014 ◽  
Vol 887-888 ◽  
pp. 252-256
Author(s):  
Zhun Li ◽  
Jing Liu ◽  
Shi De Li ◽  
Ze Lin Zheng
Keyword(s):  
Magnetic Properties ◽  
Electrical Steel ◽  
Core Loss ◽  
Reference Method ◽  
Stress Relief ◽  
Hydrogen Atmosphere ◽  
Silicon Steel ◽  
Pure Hydrogen ◽  
Final Annealing ◽  
Annealing Experiments

A high grade non-oriented electrical steel final annealing product was processed by stress relief annealing experiments under pure hydrogen atmosphere using different process parameters. The samples were compared in the aspects of magnetic properties and anisotropy, then analyzed the phenomena concerned with grain size, texture and precipitates aspects. The experiments showed that the samples magnetic properties were most improved in the 850 degrees stress relief annealing experiment, thus providing a reference method for non-oriented silicon steel stress relief annealing experiments and to obtain low core loss non-oriented silicon steel.

scholarly journals Anisotropy of Magnetic Properties in Non-oriented Electrical Steel Sheets

1989 ◽  
Vol 11 (2-4) ◽  
pp. 159-170 ◽  
Author(s):  
M. Shiozaki ◽  
Y. Kurosaki
Keyword(s):  
Magnetic Properties ◽  
Magnetic Induction ◽  
Crystallographic Orientation ◽  
Electrical Steel ◽  
Core Loss ◽  
Fluorescent Lamp ◽  
Steel Sheets ◽  
The Core ◽  
Texture Change ◽  
Electrical Steel Sheets

The anisotropy of magnetic properties in non-oriented electrical steel sheets can be evaluated by measuring Epstein specimens in the radial directions. The magnetic properties measured on ring cores are practically equal to the approximate values of magnetic properties determined by Epstein specimens in the radial directions. Non-oriented electrical steel sheets with anisotropy are not desirable for motors but are suitable for transformers and fluorescent lamp ballasts. The core loss and magnetic induction as measured with ring specimens are better with non-oriented electrical steel sheets with anisotropy than with non-oriented electrical steel sheets with random crystallographic orientation. This phenomenon depends on the texture change of the product.

scholarly journals Numerical simulation of the effective input of laser energy into a cavity through a hole

1999 ◽  
Vol 17 (4) ◽  
pp. 785-791
Author(s):  
I.G. LEBO ◽  
S.YU. GUS'KOV ◽  
V.V. DEMCHENKO ◽  
V.V. NIKISHIN ◽  
V.F. TISHKIN ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Laser Pulse ◽  
Laser Beam ◽  
High Power ◽  
Laser Energy ◽  
Numerical Calculations ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser Pulse

A possibility of input of high-power laser pulse into a cavity through a hole was studied by means of 2D numerical calculations. Such tasks appear in view of investigation of the effective targets with internal input of energy (Bessarab et al. 1992; Basov et al. 1998), “cannon-ball” (Hogan 1989), “Greenhouse” targets (Gus'kov et al. 1995).We have used two Euler codes “NUTCY” and “FAKEL” to model the problems of laser beam input into a cavity through the holes.

Detection of Weld Seam Position Based on Infrared Image during High Power Fiber Laser Welding

2012 ◽  
Vol 549 ◽  
pp. 1007-1011
Author(s):  
Yu Quan Chen ◽  
Xiang Dong Gao ◽  
Jian Yuan Huang ◽  
Qian Wen
Keyword(s):  
Laser Beam ◽  
Laser Welding ◽  
Fiber Laser ◽  
Least Squares ◽  
High Power ◽  
Least Squares Method ◽  
Infrared Image ◽  
Seam Tracking ◽  
Fiber Laser Welding ◽  
Welding Seam

Seam tracking is significant to obtain good welding quality. Aiming at establishing a model to detect and calculate the seam tracking offset during high-power fiber laser welding of Type 304 austenitic stainless steel plate butt joint welding, an infrared sensitive high-speed camera arranged off-axis orientation of laser beam was applied to capture the dynamic thermal images of molten pool. Through analyzing the infrared image, the actual position of the workpiece gap in the image was obtained. Least squares method was used to determine the precise position of the actual workpiece gap. A model that calculated the deviations between the workpiece gap and the laser beam was deduced. Also, the least squares method was used to fit the workpiece gap curve equation. The coordinate transformation technology was used and the welding seam equation was established. A linear model was obtained to detect the deviations between the workpiece gap and the welding seam. The welding experiments confirmed that the proposed welding seam equation was effective.

Effect of Antimony on the Structure, Texture and Magnetic Properties of High Efficiency Non-Oriented Electrical Steel

2012 ◽  
Vol 602-604 ◽  
pp. 435-440 ◽  
Author(s):  
Na Li ◽  
Li Xiang ◽  
Pei Zhao
Keyword(s):  
Magnetic Properties ◽  
Magnetic Flux ◽  
Flux Density ◽  
High Efficiency ◽  
Electrical Steel ◽  
Core Loss ◽  
Magnetic Flux Density ◽  
Antimony Content ◽  
The Core ◽  
Maximum Value

The effect of antimony on the structure, texture and magnetic properties of high efficiency non-oriented electrical steel were investigated. The results showed that antimony played an important role on inhibiting the grain growth and enhancing the fraction of favorable texture in the annealed steels. With the increase of antimony content, core loss of specimens monotonously increased and the magnetic flux density increased firstly and then decreased. The magnetic properties of specimen results showed that the magnetic flux density in the steel with 0.12% antimony reached the maximum value, while the core loss didn’t increase obviously. However, when the antimony content in steel reached 0.22%, the magnetic properties deteriorated significantly. This is maybe that the addition of antimony in steels inhibited the development of {111} texture content and increased the intensity of Goss and {100} texture on the grain boundary.

Effect of Fiber Laser Treating on Magnetic Domains in the Grain-Oriented Silicon Steel: Imaging Domains by Bitter, MFM and Kerr Microscopy

2016 ◽  
Vol 35 (7) ◽  
pp. 739-744 ◽  
Author(s):  
V. Puchý ◽  
F. Kováč ◽  
P. Hvizdoš ◽  
I. Petryshynets ◽  
M. Sopko
Keyword(s):  
Domain Wall ◽  
Fiber Laser ◽  
Laser Energy ◽  
Magnetic Domain ◽  
Quantitative Relationship ◽  
Silicon Steel ◽  
Magnetic Domains ◽  
Laser Scribing ◽  
Surface Patterns ◽  
Average Domain

AbstractA magnetic domain laser scribing technique of grain-oriented 3.2% silicon steel has been investigated for the direct influencing on the magnetic domain wall. The magneto-optical Kerr effect was employed to obtain a visible contrast between antiparallel domains. The effects of laser treating on domain wall were observed. The Bitter, MFM and Kerr microscope pictures showed that domain-wall positions did not repeat precisely from cycle to cycle, particularly at high inductions, and that the average domain-wall spacing decreased with increasing density of laser scribing lines. Two phenomena have been discovered that are difficult to explain (1) that the hardness decreases with increasing laser energy and (2) that the coercivity decreases with decreasing laser energy. A semi-quantitative relationship has been found between the domain patterns and used fiber laser treating method. The behavior of patterns in an applied magnetic field is shown, and based on that a two-dimensional laser lines configuration is proposed for one of the less complicated surface patterns.

scholarly journals Core Loss Measurement of Somaloy 700 Material Under Round Loci of Magnetic Flux Density

2018 ◽  
Vol 7 (3.25) ◽  
pp. 109
Author(s):  
Ashraf Rohanim Asari ◽  
Youguang Guo ◽  
Jianguo Zhu
Keyword(s):  
Magnetic Properties ◽  
Core Loss ◽  
Core Material ◽  
Magnetic Flux Density ◽  
Electrical Machine ◽  
Magnetization Process ◽  
Good Information ◽  
Rotating Magnetic Fields ◽  
Loss Measurement ◽  
The Core

The magnetic properties of SOMALOY 700 material are aggressively studied by some researchers in predicting the production of total core loss during the magnetization process of that particular material. Core loss is resulted due to the alternating and rotating magnetic fields in a core material.  The magnetic properties of SOMALOY 700 material is studied in this paper since it offers the low core loss during the operation. 2-D measurement were conducted by controlling the fluxes to be circular with the help of LabVIEW while the core loss calculations were calculated by MathCAD. The performance of SOMALOY 700 material at different frequencies were compared. The finding indicates that the magnetization at 1000 Hz contributes higher core loss compared to the magnetization at 500 Hz and 50 Hz. The details of SOMALOY 700 material provide good information to practitioners in designing electrical machine at different variation of frequencies.  

LOCORE M45

Alloy Digest ◽  
1979 ◽  
Vol 28 (1) ◽  
Keyword(s):  
Magnetic Properties ◽  
Physical Properties ◽  
Direct Current ◽  
Electrical Steel ◽  
Core Loss ◽  
Heat Treating ◽  
Alternating Current ◽  
Dc Motors ◽  
Cold Rolled ◽  
Steel Corporation

Abstract LOCORE M45 is a cold-rolled, non-oriented electrical steel used primarily for alternating current (AC) and direct current (DC) motors, generators and transformers. It is produced either semiprocessed (the consumer anneals to produce the desired magnetic properties) or fully processed (the steel producer develops the magnetic properties to meet the maximum core loss values). This datasheet provides information on composition, physical properties, microstructure, and elasticity. It also includes information on heat treating and joining. Filing Code: SA-353. Producer or source: Republic Steel Corporation.

Sign in / Sign up

Export Citation Format

Share Document