magnetic core

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magnetic core:

see computercomputer,
device capable of performing a series of arithmetic or logical operations. A computer is distinguished from a calculating machine, such as an electronic calculator, by being able to store a computer program (so that it can repeat its operations and make logical
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magnetic core

[mag′ned·ik ′kȯr]
Also known as core.
A configuration of magnetic material, usually a mixture of iron oxide or ferrite particles mixed with a binding agent and formed into a tiny doughnutlike shape, that is placed in a spatial relationship to current-carrying conductors, and is used to maintain a magnetic polarization for the purpose of storing data, or for its nonlinear properties as a logic element. Also known as memory core.
A quantity of ferrous material placed in a coil or transformer to provide a better path than air for magnetic flux, thereby increasing the inductance of the coil and increasing the coupling between the windings of a transformer.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


core, 6
1. The center of a plywood or crossbanded construction; it may consist of lumber (solid or glued) or particleboard; serves as a base for veneer.
2. The internal structure in a hollow-core door.
3. The wood chips cut from a mortise.
4. The metal bar to which a handrail is attached.
5. The internal structure which serves as a base for complex plasterwork.
6. The molded open space in a concrete masonry unit.
7. The filling within a thick hollow stone wall.
8. The filling between a lintel and relieving arches.
9. A cylindrical sample of hardened concrete or rock obtained by means of a core barrel and drill.
10. A part of a multistory building, containing a variety of service and utility functions, as elevators, stairwells, etc.
11. That part of a magnetic circuit (usually steel or iron laminations) about which are wound coils in electromagnetic devices such as transformers, solenoids, relays, etc.; a magnetic core.
12. (Brit.) The conductor of a cable with its insulation, but not including any outer protective covering.
13. That portion of a grille, 2 contained within the frame.
14. Of gypsum board, the hardened material filling the space between a face paper and a back paper; consists primarily of gypsum with additives.
15. (British) Same as blockout.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Interdependence of hysteresis and eddy-current losses in laminated magnetic cores of electrical machines.
The proposed connection scheme consists of three separate magnetic cores, each consisting of three secondary coils.
W., "Integrated inductor with magnetic core: A realistic option," Ph.D.
This analysis is focused on the low frequency harmonics of the magnetic field outside the motor, which are less attenuated than the fundamental or higher rank harmonics when they penetrate through the stator magnetic core and the motor frame.
The magnetic cores of the discrete filter inductors, integrated filter inductors with five limbs and three limbs magnetics are shown in Figure 8.
It is clear that the visible light activity of the [Fe.sub.3][O.sub.4]-Si[O.sub.2] -Ti[O.sub.2] particles is all because of their magnetic core. The relationships between irradiation time and decoloration rate of the methylene blue solution treated by P25 particles, [Fe.sub.3] [O.sub.4]-Si[O.sub.2] Ti[O.sub.2] particles, Si[O.sub.2] -Ti[O.sub.2] particles, and no particles under visible light are shown in Figure 10(b).
The 30-nanometer particle consists of an iron-oxide magnetic core with a thin gold shell that surrounds but does not touch the center.
The Jafza plant will process grain-oriented electrical steel, from coils right up to fully built magnetic cores for distribution and electrical power transformers.
The manufacturing plant, covering an area of 27,500 square metres, will process grain oriented electrical steel, from coils right up to fully built magnetic cores for distribution and electrical power transformers.
Two quick release fasteners allow the inspection panel to be opened and the magnetic cores extracted from the stainless steel tubes.
While in many cases the physical modeling has been limited to the properties related to the rolling directions, the use of computational methods in magnetic cores call for the knowledge of magnetization curve and hysteresis loops in directions that are different from rolling directions possibility of defining an intrinsic magnetization behavior in a [001](110) Fe Si (GO) single crystal is limited to the [001] and [0[bar.1]0] directions, because the magnetization process in all the other directions is affected by the sample geometry (Fiorillo et al., 2002).
One reason that induction heater efficiency is so low is hysteresis, the tendency of the magnetic cores to resist the rapid cycling of the magnetic fields.