Amorphous transformer

In this paper a generalized mathematical model was set up with the above factors taken into consideration. The mathematical model was then developed on a single-phase amorphous steel core transformer with a capacity of 3,3kVA-220V/115V to result in the degrees of deformation and vibration in cases with or without clamped iron for magnetic legs and yokes.

6p vispyker 16-11-2022 7 1   Download

In particular, the system undergoes three stages. At first stage the relaxation proceeds slowly so that the energy of system slightly decreases and the samples structure remains amorphous. Within second stage a structural transformation occurs which significantly changes PRDF and DCN for the relatively short time. The energy of the system is dropped considerably and the amorphous structure transforms into the crystalline. Finally, the crystalline sample undergoes the slow relaxation which reduces the energy of system and eliminates structural defects in crystal lattices.

17p runordie3 27-06-2022 18 3   Download

Structure of amorphous aluminosilicates obtained from mineral transformaIn this work, a mixture of sodalite (~52 wt%) and cancrinite (~30 wt%) was produced using similar conditions to those encountered in some alumina refineries using the Bayer process. These synthetic minerals were then transformed to hydrated aluminosilicates using a simple, low temperature aqueous process.tion: Potential path for partial remediation of alkaline bauxite residues

11p thebadguys 15-01-2022 15 0   Download

In this research, the dehydration behavior of kurnakovite was studied under microwave irradiation. The kinetic parameters of the dehydration reaction were determined using different kinetic models. Kurnakovite was characterized by the techniques of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) before and after the dehydration process.

11p langthannam 29-12-2021 9 0   Download

Borotellurite glasses were prepared by melt quenching technique. Amorphous nature of samples was confirmed through X-ray diffraction (XRD) patterns. Effect of B2O3 content on the structure of glass network was studied through Fourier-transform infrared spectroscopy (FTIR) spectra. Optical band gap and Urbach energy were found from analysis of optical absorption spectra. Thermal studies were carried out by using Differential thermal analyzer (DTA) measurements.

8p tamynhan6 14-09-2020 11 1   Download

he amorphous core dry-type cast-resin transformer is a type of energy- saving transformer, which the no-load losses in the amorphous metal is generally lower from 60% to 70 % than regular electrical steel (silicon steel). In this paper, the iron core and winding thermal of the dry-type transformer are simulated/analysed via a finite element method. The analysis of temperature distribution characteristics of iron core and winding in transformers is a quite important problem for researchers to show the hot-spot and the temperature rise highest point.

8p covid19 03-03-2020 37 0   Download

The objective of present work was to utilize potential of nanostructured lipid carriers (NLCs) for improvement in oral bioavailability of raloxifene hydrochloride (RLX). RLX loaded NLCs were prepared by solvent diffusion method using glyceryl monostearate and Capmul MCM C8 as solid lipid and liquid lipid, respectively. A full 32 factorial design was utilized to study the effect of two independent parameters namely solid lipid to liquid lipid ratio and concentration of stabilizer on the entrapment efficiency of prepared NLCs.

12p kequaidan1 16-11-2019 18 0   Download

The present work reports preparation of irbesartan (IBS) loaded nanofibre mats using electrospinning technique. The prepared nanofibres were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction analysis, in vitro diffusion and ex vivo skin permeation studies. FTIR studies revealed chemical compatibility of IBS and polyvinyl pyrrolidine (PVP K-30). SEM images confirmed formation of nanofibres wherein IBS existed in amorphous form as revealed by DSC and XRD analyses.

7p kequaidan1 16-11-2019 24 2   Download

Polyaniline–NiFe2O4 nanocomposites (PANI–NiFe2O4) with different contents of NiFe2O4 (2.5, 5 and 50 wt%) were prepared via in situ chemical oxidation polymerization, while the nanoparticles nickel ferrite were synthesized by sol–gel method. The prepared samples were characterized using some techniques such as Fourier transforms infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Moreover, the electrical conductivity and optical properties of the nanocomposites were investigated. Pure (PANI) and the composites containing 2.

8p trinhthamhodang1 16-11-2019 17 0   Download

BCS class III drugs suffer from a drawback of low permeability even though they have high aqueous solubility. The objective of current work was to screen the suitability of glyceryl monooleate (GMO)/Pluronic F127 cubic phase liquid crystals precursors for permeation enhancement and in turn the bioavailability of tenofovir disoproxil fumarate (TDF), a BCS class III drug. Spray-drying method was used for preparation of TDF loaded liquid crystal precursors (LCP) consisting of GMO/Pluronic F127 and lactose monohydrate with an ability to in situ transform into stable cubic phases upon hydration.

10p trinhthamhodang1 14-11-2019 13 0   Download

In this paper, high-quality polycrystalline silicon (poly-Si) thin films on glass substrates are formed by Aluminum-induced crystallization (AIC). In AIC processes, bi-layer structures of amorphous silicon (a-Si) / Al are transformed into ones of (Al+ residual Si)/ poly-Si after simply annealing at 500°C in vacuum furnace.

7p queencongchua3 09-09-2019 15 0   Download

The X-ray diffraction (XRD) pattern with only one peak at 2θ ~ 220 confirmed the amorphous phase of SiO2 NPs. The Fourier transform infrared (FTIR) and energydispersive X-ray (EDX) spectra were also used to evaluate the functional groups and the purity of SiO2 NPs. The SiO2 NPs powder with high purity could be suitably produced by calcination of acid treated RHA at 7000 C for 2h.

5p everydaywish 25-12-2018 28 0   Download

The structural properties of these nanocomposites were characterized with scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT–IR). The scanning electron microscope (SEM) photo showed that the TiO2– SiO2 layer is thicker than TiO2 layer on the cotton fabric and PES/Co fabric and the Ti–particles were always surrounded by amorphous SiO2 and never alone by themselves. The TiO2–SiO2 nanocomposites were coated onto cotton and PES/Co fabrics by a simple dip–pad–dry–cure process.

8p cumeo3000 01-08-2018 25 0   Download

Air gap in coupled inductor, 502 in flyback transformer, 503 in inductor, 464-466, 498, 505, 509 in transformer, 469 AL (mH/1000 turns), 509 American wire gauge (AWG) data, 755-756 design examples, 527, 531 Amorphous alloys, 473 AmpereÕs law, 457-458 Amp-second balance (see Capacitor charge balance) Apparent power, 550 Artificial ramp circuit, 415 effect on CPM boost low-harmonic rectifier, 637-639 effect on line-to-output transfer function of CCM buck, 437-438 effect on small-signal CCM models, 428-438 effect on small-signal DCM models, 438-447 effect on stability of CPM controllers, 414-4...

20p longmontran 14-01-2010 99 4   Download