Erratum: Calculation of magnetic field and forces in electromagnetic devices for separation of steel sheets

1987 ◽  
Vol 134 (3) ◽  
pp. 175
Author(s):  
J.F. Gieras ◽  
M. Hippner
Keyword(s):  
Magnetic Field ◽  
Steel Sheets ◽  
Electromagnetic Devices

2D analysis of magnetic field strength in GO SiFe steel sheets

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-579-Pr2-582 ◽  
Author(s):  
S. Tumanski ◽  
M. Stabrowski
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Steel Sheets

NONRECIPROCAL ELECTROMAGNETIC DEVICES IN GYROMAGNETIC PHOTONIC CRYSTALS

2013 ◽  
Vol 28 (02) ◽  
pp. 1441010 ◽  
Author(s):  
ZHI-YUAN LI ◽  
RONG-JUAN LIU ◽  
LIN GAN ◽  
JIN-XIN FU ◽  
JIN LIAN
Keyword(s):  
Magnetic Field ◽  
Band Gap ◽  
Electromagnetic Waves ◽  
Experimental Studies ◽  
Magnetic Surface ◽  
Electromagnetic Properties ◽  
Edge States ◽  
Bragg Scattering ◽  
Electromagnetic Devices ◽  
Gap Opening

Gyromagnetic photonic crystal (GPC) offers a promising way to realize robust transport of electromagnetic waves against backscattering from various disorders, perturbations and obstacles due to existence of unique topological electromagnetic states. The dc magnetic field exerting upon the GPC brings about the time-reversal symmetry breaking, splits the band degeneracy and opens band gaps where the topological chiral edge states (CESs) arise. The band gap can originate either from long-range Bragg-scattering effect or from short-range localized magnetic surface plasmon resonance (MSP). These topological edge states can be explored to construct backscattering-immune one-way waveguide and other nonreciprocal electromagnetic devices. In this paper we review our recent theoretical and experimental studies of the unique electromagnetic properties of nonreciprocal devices built in GPCs. We will discuss various basic issues like experimental instrumental setup, sample preparations, numerical simulation methods, tunable properties against magnetic field, band degeneracy breaking and band gap opening and creation of topological CESs. We will investigate the unidirectional transport properties of one-way waveguide under the influence of waveguide geometries, interface morphologies, intruding obstacles, impedance mismatch, lattice disorders, and material dissipation loss. We will discuss the unique coupling properties between one-wave waveguide and resonant cavities and their application as novel one-way bandstop filter and one-way channel-drop filter. We will also compare the CESs created in the Bragg-scattering band gap and the MSP band gap under the influence of lattice disorders. These results can be helpful for designing and exploring novel nonreciprocal electromagnetic devices for optical integration and information processing.

scholarly journals Calculations of magnetic field in dynamo sheets taking into account their texture

Open Physics ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 1034-1038
Author(s):  
Witold Mazgaj ◽  
Zbigniew Szular ◽  
Paweł Szczurek
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Measurements ◽  
Iron Particles ◽  
Easy Magnetization ◽  
Anisotropic Properties ◽  
Steel Sheets ◽  
The Given ◽  
Dynamo Steel ◽  
Magnetization Processes

Abstract Magnetic measurements have shown that the most dynamo steel sheets have certain anisotropic properties, which are due to the presence of textures in these sheets. These anisotropic properties have been taken into account usually in a simplified way assuming that iron particles of the dynamo sheets have only one axis of the easy magnetization. In the proposed approach, these particles are treated as grains which have three axes of the easy magnetization, and therefore the magnetization processes can be considered along each of these axes. These processes depend on the actual value and on the direction of the field strength and also on textures occurring in the given dynamo sheet. A method which allows calculations of the field distribution as a function of the assumed changes of external currents is described in this paper.

Rotational power loss of magnetic steel sheets in a circular rotational magnetic field in CCW/CW directions

2008 ◽  
Vol 320 (20) ◽  
pp. e567-e570 ◽  
Author(s):  
Yoshitaka Maeda ◽  
Hiroyasu Shimoji ◽  
Takashi Todaka ◽  
Masato Enokizono
Keyword(s):  
Magnetic Field ◽  
Power Loss ◽  
Steel Sheets ◽  
Rotational Magnetic Field ◽  
Magnetic Steel ◽  
Rotational Power

scholarly journals Approximation of Hysteresis Changes in Electrical Steel Sheets

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4110
Author(s):  
Witold Mazgaj ◽  
Michal Sierzega ◽  
Zbigniew Szular
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Hysteresis Loop ◽  
Flux Density ◽  
Electrical Steel ◽  
Transformer Steel ◽  
Simple Method ◽  
Steel Sheets ◽  
Electrical Steel Sheets ◽  
The Magnetic Field

This paper describes a simple method of approximating hysteresis changes in electrical steel sheets. This method is based on assumptions that flux density or field strength changes are a sum or a difference of functions that describe one curve of the limiting hysteresis loop and a certain ‘transient’ component. Appropriate formulas that present the flux density as functions of the field strength and those that present inverse dependencies are proposed. An application of this approximation requires knowledge of the measured limiting hysteresis loop and a few minor loops. Algorithms for determining changes in the flux density or field strength are proposed and discussed. The correctness of the proposed approximation of hysteresis changes was verified through a comparison of measured hysteresis loops with the loops calculated for several different excitations of the magnetic field occurring in dynamo and transformer steel sheets. Additionally, an example of the application of the proposed approximation of hysteresis changes is discussed in the paper. The proposed approximation of hysteresis changes is recommended for numerical calculations of the magnetic field distribution in dynamo and transformer steel sheets.

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