نتایج جستجو برای: magnetic hysteresis
تعداد نتایج: 349501 فیلتر نتایج به سال:
We predict that left-handed metamaterials with nonlinear response can support both TEand TM-polarized self-trapped localized beams, or spatial electromagnetic solitons. Such solitons appear as singleand multi-hump beams, being either symmetric or antisymmetric, and they are modified dramatically by the hysteresis-type magnetic nonlinearity and the effective domains of negative magnetic permeabi...
I Abstract In the process of designing an electric power supply system for an aircraft, parameters like low weight and low losses are important. Reliability, robustness and low cost are other important factors. In the Saab Gripen aircraft, the design of the primary power supply of the electric flight control system was updated by exchanging a switching transistor regulator to a magnetic amplifi...
Manganese oxide nanoparticles were synthesized by sol-gel technique. Annealing in 250°C leading to produce Mn3O4 .Mn2O3 was obtained by increasing annealing temperature.Potassium permanganate and maleic acid were used to produce MnO2 at room temperature.The structural properties of manganese oxides were investigated by XRD spectrum and the average crystallite size were identified in the range o...
The measurements of temperature dependence of AC magnetic susceptibility were used to study the influence of inhomogeneities on intragranular superconducting properties of Y Ba2Cu3−XMXOY (M=Fe,X=0,005;Al,X=0,01;Cr, X=0,01), Bi1,7Pb0,2Sb0,1Sr2Ca2Cu3OY and Bi1,5Pb0,3Sb0,2Sr2Ca2Cu3OY ceramics. It is found that step-like regions are revealed on AC magnetic field dependence curves T g m(h0) of hyste...
Magnetic core saturation of transformers and rotating machines generate harmonics. Harmonics are integer multiples of the fundamental frequency. Harmonics is caused by nonlinear devices in the power system. Due to the non-linear loads, power frequency harmonics exist mainly in distribution systems. The current harmonics cause voltage harmonics, hence resulting in nonsinusoidal supply voltage in...
Field-induced strains of 6% are reported in ferromagnetic Ni–Mn–Ga martensites at room temperature. The strains are the result of twin boundary motion driven largely by the Zeeman energy difference across the twin boundary. The strain measured parallel to the applied magnetic field is negative in the sample/field geometry used here. The strain saturates in fields of order 400 kA/m and is blocke...
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