Application of an exactly invertible hysteresis model to magnetic field computations

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-639-Pr2-642 ◽  
Author(s):  
V. Basso ◽  
G. Bertotti ◽  
C. Serpico ◽  
C. Visone
Keyword(s):  
Magnetic Field ◽  
Hysteresis Model

The Hysteresis Model of Terfenol-D with Magneto-Stress Coupling

2011 ◽  
Vol 121-126 ◽  
pp. 4820-4825
Author(s):  
Ai Hua Meng ◽  
Han Lin He ◽  
Min Kong ◽  
Ming Fan Li
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Constitutive Relation ◽  
Hysteresis Model ◽  
Hysteresis Behavior ◽  
Nonlinear Hysteresis ◽  
Nonlinear Constitutive Relation

The output of Terfenol-D is nonlinear and hysteretic under the effect of magnetic field and prestress. The nonlinear constitutive relation between magnetostriction and magnetization with magneto-stress coupling was built in consideration of the magnetostriction saturation and the prestress correlation. Then, the hysteresis behavior of Terfenol-D was modeled based on the Jiles-Atherton model. The error of magnetostriction between simulations and experimental data is less than 6%. This result indicates that the model can adequately predict the nonlinear hysteresis and magneto-stress coupling character of Terfenol-D.

Dynamic Coupling Hysteresis Model for Giant Magnetostrictive Materials

2011 ◽  
Vol 311-313 ◽  
pp. 2262-2268 ◽  
Author(s):  
Ai Hua Meng ◽  
Ming Fan Li ◽  
Han Lin He ◽  
Hua Wei Ji
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Constitutive Model ◽  
Elastic Coupling ◽  
Hysteresis Model ◽  
Dynamic Coupling ◽  
Nonlinear Constitutive Model ◽  
Giant Magnetostrictive Material ◽  
Giant Magnetostrictive Materials ◽  
Dynamic Magnetic Field

The giant magnetostrictive material (GMM) in dynamic magnetic field has nonlinear and hysteretic characters. Based on the nonlinear constitutive model of the material, the quasi-static hysteresis model with magneto-elastic coupling was built on the Jiles-Atherton model. Considering the eddy current and anomalous losses, the hysteresis model was modified, and the dynamic coupling hysteresis model was established on the basis. Compared with the experimental data, the areas of hysteresis curves increased with frequency, and the maximum magnetostriction strain of the curves increased with prestress. The model agreed well with the experiments within the range of 500Hz.

Analysis and Simulation of Rotating Magnetic Field Diffusion Through a Parallelogram Hysteresis Model

2007 ◽  
Vol 43 (4) ◽  
pp. 1409-1412
Author(s):  
Ermanno Cardelli ◽  
Sebastiano Di Fraia ◽  
Bernardo Tellini ◽  
Carmine Zappacosta
Keyword(s):  
Magnetic Field ◽  
Rotating Magnetic Field ◽  
Hysteresis Model ◽  
Field Diffusion

scholarly journals Model and Experimental Study on Optical Fiber CT Based on Terfenol-D

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2255 ◽  
Author(s):  
Wang Li ◽  
Xia Kewen ◽  
Weng Ling
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Fiber Bragg Grating ◽  
Current Transformer ◽  
Bias Current ◽  
Bragg Grating ◽  
Hysteresis Model ◽  
Strain Sensing ◽  
Prestressing Force ◽  
Nonlinear Hysteresis

A nonlinear hysteresis model of magneto-mechanical-thermo coupling for Terfenol-D materials is presented according to Wiss ferromagnetic theory, thermodynamics relations and Jiles–Atherton model. Numerical calculation and experimental results show that the mode well reflects the magnetostrictive characteristics of Terfenol-D rod under the coupling of stress, temperature and magnetic field. A fiber Bragg grating current transformer based on Terfenol-D material is designed according to the strain sensing mechanism of fiber Bragg grating and the demodulation principle of unbalanced M–Z interferometer. The theoretical analysis and research on the working characteristics of the fiber current transformer under the influence of different prestressing force and bias current are carried out. The results are important for the design and application of the current transformer with the Terfenol-D material.

Magnetic-field strengths from optical polarization data

1967 ◽  
Vol 31 ◽  
pp. 381-383
Author(s):  
J. M. Greenberg
Keyword(s):  
Magnetic Field ◽  
Optical Polarization ◽  
Polarization Data ◽  
Term Model ◽  
Source Of Information ◽  
Field Strengths

Van de Hulst (Paper 64, Table 1) has marked optical polarization as a questionable or marginal source of information concerning magnetic field strengths. Rather than arguing about this–I should rate this method asq+-, or quarrelling about the term ‘model-sensitive results’, I wish to stress the historical point that as recently as two years ago there were still some who questioned that optical polarization was definitely due to magnetically-oriented interstellar particles.

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