Distribution of magnetic induction along hollow core of round section in constant homogeneous magnetic field

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

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Distribution of residual magnetic induction along a solid circular core magnetized in longitudinal constant homogeneous magnetic field

Russian Electrical Engineering ◽

10.3103/s1068371211050075 ◽

2011 ◽

Vol 82 (5) ◽

pp. 275-280 ◽

Cited By ~ 1

Author(s):

V. F. Matyuk ◽

A. A. Osipov ◽

A. V. Strelyukhin

Keyword(s):

Magnetic Field ◽

Magnetic Induction ◽

Homogeneous Magnetic Field ◽

Residual Magnetic Induction

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Designing a structure of the magnetically active part of dipole electromagnets for the system of vertical convergence-separation of beams

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2021.228655 ◽

2021 ◽

Vol 2 (5 (110)) ◽

pp. 14-22

Author(s):

Andriy Getman

Keyword(s):

Magnetic Field ◽

Magnetic Induction ◽

Homogeneous Magnetic Field ◽

Heavy Ion ◽

Active Part ◽

Dipole Magnet ◽

Assigned Value ◽

Magnetic Parameters ◽

The Third ◽

The Stability

This paper reports the results of calculating the magnetic parameters for a direct dipole magnet in the system of vertical convergence-separation of particle beams of the upper and lower rings of the heavy-ion collider. An optimized variant of the yoke and superconducting winding structures has been obtained, providing for the assigned value of a homogeneous magnetic field inside the aperture at the minimized contributions of higher-order harmonics, average-integral along the length. The results from the analysis of the transverse projections of the magnetic induction obtained by 2D modeling of two variants of the design of the central cross-section of the dipole electromagnet are presented. The analysis results have established the dependence of the stability of magnetic parameters in the aperture of the electromagnet when the current in the winding changes on the volume of those yoke regions whose magnetization value is close to saturation. A 3D model of the magnetically active part has been built for two variants of the electromagnet design, and the values of the average-integral harmonics of transverse projections of magnetic induction in the aperture have been calculated. The relationship between the third average-integral harmonic of magnetic induction and the size lengths of the yoke and winding has been empirically established, making it possible to correct the heterogeneity of the transverse magnetic field in the aperture of the electromagnet. The results of optimization of the structure of the magnetically active part of the electromagnet are presented on the criteria for a minimum of the values of the average-integral coefficients of magnetic induction, carried out on the basis of correction of the initial geometric parameters of the yoke and winding. An improvement in the stability of magnetic parameters has been demonstrated, by 3 times, as well as a two-fold reduction in the contribution to the heterogeneity by the third average-integral harmonic when using a two-row arrangement of the winding turns inside the yoke in the design of the electromagnet

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Notizen: Effect of Magnetic Field on Ascorbic Acid Oxidase Activity, I

Zeitschrift für Naturforschung C ◽

10.1515/znc-1986-0319 ◽

1986 ◽

Vol 41 (3) ◽

pp. 355-358 ◽

Cited By ~ 4

Author(s):

V. S. Ghole ◽

P. S. Damle ◽

W. H.-P. Thiemann

Keyword(s):

Magnetic Field ◽

Ascorbic Acid ◽

Homogeneous Magnetic Field ◽

Acid Oxidase ◽

High Substrate Concentration ◽

Ascorbic Acid Oxidase ◽

Rate Of Reaction ◽

Substrate Concentrations ◽

Burk Plot

A homogeneous magnetic field of 1.1 T strength exhibits a significant influence on the activity of the enzyme ascorbic acid oxidase in vitro. A Lineweaver-Burk plot of the reaction shows the typical pattern of a mixed-type inhibition, i.e. a larger rate of reaction at low substrate concentrations and a smaller rate of reaction at high substrate concentration than that of the control without magnetic field applied.

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High-sensitivity fiber optic magnetic field sensor based on lossy mode resonance and hollow core-offset structure

Instrumentation Science & Technology ◽

10.1080/10739149.2021.1878216 ◽

2021 ◽

pp. 1-12

Author(s):

Xue-Peng Jin ◽

Hong-Zhi Sun ◽

Shuo-Wei Jin ◽

Wan-Ming Zhao ◽

Jing-Ren Tang ◽

...

Keyword(s):

Magnetic Field ◽

Fiber Optic ◽

High Sensitivity ◽

Magnetic Field Sensor ◽

Hollow Core ◽

Field Sensor

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Finite Element Analysis of Magnetic Field Exciter for Direct Testing of Magnetocaloric Materials’ Properties

Energies ◽

10.3390/en14102792 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2792

Author(s):

Wieslaw Lyskawinski ◽

Wojciech Szelag ◽

Cezary Jedryczka ◽

Tomasz Tolinski

Keyword(s):

Magnetic Field ◽

Finite Element ◽

Magnetic Circuit ◽

Homogeneous Magnetic Field ◽

Element Analysis ◽

Mcm Testing ◽

Testing Region ◽

Magnetocaloric Materials ◽

Field Excitation ◽

The Magnetic Field

The paper presents research on magnetic field exciters dedicated to testing magnetocaloric materials (MCMs) as well as used in the design process of magnetic refrigeration systems. An important element of the proposed test stand is the system of magnetic field excitation. It should provide a homogeneous magnetic field with a controllable value of its intensity in the MCM testing region. Several concepts of a magnetic circuit when designing the field exciters have been proposed and evaluated. In the MCM testing region of the proposed exciters, the magnetic field is controlled by changing the structure of the magnetic circuit. A precise 3D field model of electromagnetic phenomena has been developed in the professional finite element method (FEM) package and used to design and analyze the exciters. The obtained results of the calculations of the magnetic field distribution in the working area were compared with the results of the measurements carried out on the exciter prototype. The conclusions resulting from the conducted research are presented and discussed.

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