scholarly journals Hydrogen molecules in a superstrong magnetic field: Excitation levels

1996 ◽  
Vol 53 (1) ◽  
pp. 152-167 ◽  
Author(s):  
Dong Lai ◽  
Edwin E. Salpeter
Keyword(s):  
Magnetic Field ◽  
Superstrong Magnetic Field ◽  
Hydrogen Molecules ◽  
Field Excitation

Hydrogen molecules and chains in a superstrong magnetic field

1992 ◽  
Vol 45 (7) ◽  
pp. 4832-4847 ◽  
Author(s):  
Dong Lai ◽  
Edwin E. Salpeter ◽  
Stuart L. Shapiro
Keyword(s):  
Magnetic Field ◽  
Superstrong Magnetic Field ◽  
Hydrogen Molecules

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

Energies ◽  
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.

Internal Organizational Measurement for Control of Magnetorheological Fluid Properties

2006 ◽  
Vol 129 (4) ◽  
pp. 423-428 ◽  
Author(s):  
John R. Lloyd ◽  
Miquel O. Hayesmichel ◽  
Clark J. Radcliffe
Keyword(s):  
Magnetic Field ◽  
Physical Properties ◽  
High Sensitivity ◽  
Time Varying ◽  
Measurable Effect ◽  
Mr Fluid ◽  
Fluid State ◽  
Mr Fluids ◽  
Fluid Properties ◽  
Field Excitation

Magnetorheological (MR) fluids change their physical properties when subjected to a magnetic field. As this change occurs, the specific values of the physical properties are a function of the fluid’s time-varying organization state. This results in a nonlinear, hysteretic, time-varying fluid property response to direct magnetic field excitation. Permeability, resistivity and permittivity changes of MR fluid were investigated and their suitability to indicate the organizational state of the fluid, and thus other transport properties, was determined. High sensitivity of permittivity and resistivity to particle organization and applied field was studied experimentally. The measurable effect of these material properties can be used to implement an MR fluid state sensor.

Design of Braunbeck Coil for Nuclear Magnetic Resonance Gyro Magnetic Field Excitation

2018 ◽  
Vol 23 (6) ◽  
pp. 740-745
Author(s):  
Pei Wang ◽  
Hua Liu ◽  
Xiang Cheng ◽  
Wanliang Zhao ◽  
Shaoliang Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Field Excitation ◽  
Nuclear Magnetic

scholarly journals Distributed variable stiffness joint assist mechanism based on laminated structure

2021 ◽  
Vol 18 (6) ◽  
pp. 172988142110606
Author(s):  
Zhenquan Fan ◽  
Xiaoyu Wang ◽  
Zijin Wang ◽  
Sijia Gao ◽  
Sheng Lin
Keyword(s):  
Magnetic Field ◽  
Stiffness Matrix ◽  
Variable Stiffness ◽  
Drive Unit ◽  
Joint Power ◽  
Laminated Structure ◽  
Giant Magnetostrictive Material ◽  
In Series ◽  
Field Excitation ◽  
The Magnetic Field

Exoskeleton technology is more and more widely used in military, human rehabilitation, and other fields, but exoskeleton assisting mechanisms have problems such as high quality, concentrated driving sources, and poor flexibility. This article proposes a distributed variable stiffness joint power-assisted mechanism based on a laminated structure, which uses a giant magnetostrictive material as the driving source and the variable stiffness source of the structure. The distributed driving is realized by multiple driving units connected in series and parallel. Firstly, the drive unit stiffness matrix is deduced, and the expression equations of the cascaded total stiffness matrix of the drive module are obtained. After the simulation study, the curve of the stiffness of a single drive unit with a magnetic field and the stiffness of multiple drive units connected in series and parallel are in the absence of the magnetic field. The change curve of the stiffness of the booster module with the number of drive units under the excitation and saturation magnetic field excitation conditions is to achieve the effect of dynamically controlling the structural stiffness of the drive unit by controlling the size of the magnetic field and to obtain a general formula through data fitting. The number of drive units required under a fixed magnetic field excitation can ensure that the error is within 5%. The research results lay the foundation for further analysis of the distributed variable stiffness joint assist technology.

scholarly journals Magnetoelectric cantilever sensors under inhomogeneous magnetic field excitation

AIP Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 025132
Author(s):  
Mesut-Ömür Özden ◽  
Alexander Teplyuk ◽  
Ömer Gümüs ◽  
Dirk Meyners ◽  
Michael Höft ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Inhomogeneous Magnetic Field ◽  
Cantilever Sensors ◽  
Field Excitation
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