Magnetic Core

For the practical implementation of the above mentioned facts, the portable electronic digital coercive force meter with self-contained power supply, attached converter and closed type magnetic core. Instrument error is 5 %. ... 

As stated above the SQUID amplifier demands a low inductance Eddy current probe in order to be able to amplify signals up to 1 MHz. Low inductance Eddy current probes can be obtained by reducing the number of turns and by loosing the magnetic coupling between the tums. So magnetic cores should be avoided as well as tight wounded tums. For this purpose planar coils are the best... 

Coreless furnaces derive their name from the fact that the coil encircles the metal charge but, in contrast to the channel inductor described later, the cod does not encircle a magnetic core. Figure 8 shows a cross section of a typical medium sized furnace. The cod provides support for the refractory that contains the metal being heated and, therefore, it must be designed to accept the mechanical loads as well as the conducted thermal power from the load. 

Pure iron is a silvery white, relatively soft metal and is rarely used commercially. Typical properties are Hsted in Table 1. Electrolytic (99.9% pure) iron is used for magnetic cores (2) (see Magnetic materials, bulk). Native metallic iron is rarely found in nature because iron which commonly exhibits valences of +2 and +3 combines readily with oxygen and sulfur. Iron oxides are the most prevalent form of iron (see Iron compounds). Generally, these iron oxides (iron ores) are reduced to iron and melted in a blast furnace. The hot metal (pig iron) from the blast furnace is refined in steelmaking furnaces to make steel... 

CT with a primary winding (4) CT with two secondary windings, in 2 sections which may be each with its own magnetic core, connected in series or parallel... 

Excessive healing of magnetic cores, as a result of harmonic frequencies due to hysteresis and eddy current losses (equations (1.I2) and (1.13)). 

Excessive saturation of the magnetic core reduces the value of L, and raises the magnetizing current disproportionately. say up to ten times the normal value or even more, as discussed in Section 1.2. 

The phenomenon of saturation of the magnetic core of such a device during normal operation and its resonance with the ground capacitive reactance, X. , is known as ferro-resonance. It would have the same effect on the healthy phase,s/system as in (i) above. 

The electromagnetic relays, which have a magnetic core and are matched to the fundamental frequency, may be sensitive to such disuirbtinces and may malfunction, sending erroneous signals. 

Using the LF method of determining the size of an MPP toroid, one determines the Magnetics core part number P/N 55930A2. The number of turns should be... 

Figure 7.9. A small portion of a magnetic core memory (after IBM News, 1967).

Fig. 5.14. A shock wave is depicted propagating at wavespeed U through one leg of a magnetic core with thickness /. The inductance is L, the magnetic flux is w is the thickness of the core, and the change in magnetization is AM. The predicted currenttime pulse i(t) is linearly increasing.

Structural binder A wide range of applications in electronics makes use of the plastics as a structural binder to hold active materials. For example, a plastic such as polyvinylidene fluoride is filled with an electroluminescent phosphor to form the dielectric element in electroluminescent lamps. Plastics are loaded with barium titanate and other high dielectric powders to make slugs for high K capacitors. The cores in high frequency transformers are made using iron and iron oxide powders bonded with a plastic and molded to form the magnetic core. 

Superior water conditioners. These are tubular-shaped devices that employ permanent magnets (no electrical connection). The devices are designed with a cobalt-content alloy core, arranged so that water flows around the magnetic core and perpendicular to the magnetic fields. 

Vogt, C., Toprak, M.S., Muhammed, M., Laurent, S., Bridot, J.L. and Muller, R.N. (2010) High quality and tuneable silica shell-magnetic core nanopartides. Journal of Nanoparticle Research, 12 (4), 1137-1147. 

Vestal, C.R. and Zhang, Z.J. (2003) Synthesis and magnetic characterization of Mn and Co spinel ferrite—silica nanopartides with tunable magnetic core. Nano Letters, 3 (12), 1739-1743. 

Arias, J.L., Gallardo, V., Gomez-Lopera, S.A., Plaza, R.C. and Delgado, A.V. (2001) Synthesis and characterization of poly(ethyl-2-cyanoacrylate) nanoparticles with a magnetic core. Journal of Controlled Release, 77, 309-321. 

Deng Y, Wang C, Shen X, Yang W, Jin L, Gao H, Fu S (2005) Preparation, characterization, and application of multistimuli-responsive microspheres with fluorescence-labeled magnetic cores and thermoresponsive shells. Chem Eur J 11 6006-6013... 

Fig. 11. Double mass spectrometer for investigation of dissociation after charge exchange. The ions A in mass spectrometer A move in a vertical plane and the ions B move in a horizontal plane. The permanent magnet core is shown only in magnet A.

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