Inductance Coil


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Related to Inductance Coil: impedance coil

inductance coil

[in′dək·təns ‚kȯil]
(control systems)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Inductance Coil

 

an insulated conductor wound into a spiral and having considerable inductance, relatively low capacitance, and low effective resistance. An inductance coil consists of an insulated single-strand, less frequently multistrand, wire wound on a cylindrical, toroidal, or rectangular frame made from a dielectric; frameless inductance coils are also used. The, winding may be single-layer (row winding with a pitch) or multilayer (row, random, or universal winding). To increase inductance, cores are made of ferromagnetics, such as electrical steel, Permalloy, iron carbonyl, or ferrites. Cores are also used to produce small changes in the inductance of resonant circuits.

The inductance of an inductance coil is proportional to the linear dimensions of the coil, to the square of the number of turns in the winding, and to the magnetic permeability of the core; it ranges from a few tenths of a microhenry to dozens of henrys. Among the main parameters of an inductance coil are loss resistance, quality factor, temperature coefficient of inductance, and self-capacitance. Inductance coils are widely used as components of filters and of oscillatory circuits, in transformers, as chokes, in relays, and in magnetic amplifiers and electromagnets.

Special inductance coil designs include the windings of electrical machines, frame antennas and ferrite antennas, and flat print-ed-circuit coils used in micromodules.

REFERENCES

Sprawchnik po radiotekhnike. Edited by B. A. Smirenin. Moscow-Leningrad, 1950.
Siforov, V. I. Radiopriemnye ustroistva, 5th ed. Moscow, 1954.
Bessonov, L. A. Teoreticheskie osnovy elektrotekhniki. Moscow, 1964.

E. G. BILYK

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Owing to the large overlapped area of the inductance coils of the sensor, its size does not increase significantly compared to the single-parameter counter-part.
The power electronics driving gradient coils are solid state constant current amplifiers designed specifically to supply the low resistance, very high inductance coils. They can supply high voltage as needed in order to overcome gradient coil inductance and allow rapid switching of gradient polarity.
An air core is preferred for lower inductance coils because it can't saturate.
Welsby, The Theory and Design of Inductance Coils, MacDonald & Co., 1950.