نتایج جستجو برای: saturation magnetization

تعداد نتایج: 64601  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده برق و کامپیوتر 1391

in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...

Journal: :international journal of nano dimension 0
h. arabi physics department, ferdowsi university of mashhad, mashhad, iran. h. asnaashari eivari physics department, university of zabol, zabol, iran.

iron oxide nanoparticles were synthesized by coprecipitation method using ammonia as precipitation agent. most researchers usually add ammonia into the iron salt solution but in this work the salt solution drop wise has been added to the ammonia and the new obtained results were compared with those of other researches. magnetic properties of nanoparticles were measured by vsm. the effect of rea...

Journal: :international journal of electrical and electronics engineering 0
mansour ojaghi زنجان - خ صفا -کوچه شهید علوی - سمت راست - پ 7 mahdi sabouri

multiple coupled circuit modeling of squirrel-cage induction motors, or winding function approach is the most detailed and complete analytical model used to analyze the performance of the faulty induction motors. this paper extends the above-mentioned model to a saturable model including variable degrees of the saturation effects using an appropriate air gap function and novel techniques for lo...

حکیمی, محسن, خواجه‌امینیان, محسن,

Arc-melting with ball milling was used for preparing Fe2CoGa1+x and Co2FeGa1+x (x=0,0.2) Heusler samples. Effect of extra nonmagnetic Ga atoms on lattice ordering and magnetic properties of Fe2CoGa and Co2FeGa Heusler compounds was studied. Rietveld refinement showed that lattice parameter of the samples increases in the presence of extra Ga atoms. Results showed that Co2FeGa1.2 has a partial ...

Iron oxide nanoparticles were synthesized by coprecipitation method using ammonia as precipitation agent. Most researchers usually add ammonia into the iron salt solution but in this work the salt solution drop wise has been added to the ammonia and the new obtained results were compared with those of other researches. Magnetic properties of nanoparticles were measured by VSM. The effect of rea...

Iron oxide nanoparticles were synthesized by coprecipitation method using ammonia as precipitation agent. Most researchers usually add ammonia into the iron salt solution but in this work the salt solution drop wise has been added to the ammonia and the new obtained results were compared with those of other researches. Magnetic properties of nanoparticles were measured by VSM. The effect of rea...

Journal: :journal of ultrafine grained and nanostructured materials 2014
mahdi ghazanfari fatemeh johar ahmad yazdani

this paper is a report on the synthesis of the fe3o4@ag core-shell with high saturation magnetization of magnetite nanoparticles as the core, by using polyol route and silver shell by chemical reduction. x-ray diffraction (xrd) and fourier transform infrared spectroscopy analyses confirmed that the particles so produced were monophase. the magnetic properties of the product were investigated by...

حسن‌پور, احمد, خلفی, نرگس, نیایی‌فر, محمد,

In this work, Ce-YIG nanoparticles with nominal composition of Y3-xCexFe5O12 (x = 0, 0.1, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8) were first fabricated by sol-gel method and then the influence of the cerium substitution on the structural and magnetic properties of garnet nanoparticles were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FT-IR)...

Journal: :Magnetic resonance in medicine 2001
K Scheffler O Heid J Hennig

A novel fat saturation scheme is proposed which combines spectral fat saturation with a steady-state 3D true Fast Imaging with Steady Precesson (TrueFISP) sequence. Fat saturation consisted of a conventional frequency-selective excitation pulse surrounded by spoiler gradients. This saturation block was periodically repeated within a continuously running TrueFISP sequence. Except for the fat sig...

2009
F. Du Q. Xiong X-H. Zhu

Fig. 3 Dependence of magnetization ratios between control (Mc) and saturation (Ms) on the rate constants (kf=0-0.4 s) and repetition time (tr=0.25-30 s) simulated by the Bloch-equations. Flip angle (β=45°) and d2=0 were applied for the simulations. The magnetization ratios indicated by circle, solid and blank squares were measured with tr = 12, 3 and 1s, respectively. An Improved Magnetization ...

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