induction coil


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induction coil

a transformer for producing a high voltage from a low voltage. It consists of a cylindrical primary winding of few turns, a concentric secondary winding of many turns, and often a common soft-iron core

induction coil

[in′dək·shən ‚kȯil]
(electromagnetism)
A device for producing high-voltage alternating current or high-voltage pulses from low-voltage direct current, in which interruption of direct current in a primary coil, containing relatively few turns of wire, induces a high voltage in a secondary coil, containing many turns of wire wound over the primary.

Induction coil

A device for producing a high-voltage alternating current or high-voltage pulses from a low-voltage direct current. The largest modern use of the induction coil is in the ignition system of internal combustion engines, such as automobile engines. Devices of similar construction, known as vibrators, are used as rectifiers and synchronous inverters. See Ignition system

The illustration shows a typical circuit diagram for an induction coil. The primary coil, wound on the iron core, consists of only a few turns. The secondary coil, wound over the primary, consists of a large number of turns.

Induction coils of a different type are used in telephone circuits to step up the voltage from the transmitter and match the impedance of the line. The direct current in the circuit varies in magnitude at speech frequencies; therefore, no interrupter contacts are necessary. Still another type of induction coil, called a reactor, is really a one-winding transformer designed to produce a definite voltage drop for a given current. See Reactor (electricity)

References in periodicals archive ?
Figure 1 shows part of the molten metal pool and part of the induction coil, distributed in relation to the vertical axis of symmetry.
The flux within the induction coil is the integral of the flux density B over the area segment da, [PHI] = [integral]B * da.
OLD SPARKY: Pupil Charlie Hainwith the induction coil on display at Warwick School.
As a result of the presence of the metallic frame, this ladle is characterised by high strength and the body itself does not screen the electromagnetic field of the induction coil [0].
The model consists of a copper pipe, a brass flange, brazing alloy, a water cooled induction coil and surrounding air.
The fundamental operational difference between the two is the rate at which each applies power to the induction coil under varying conditions.
The induction coil can be shaped to match the contours of the cavity, and the nature of induction heating--it is effective mainly for heating surface layers as the electromagnetic wave decays as it penetrates the conductor--suits it particularly to cavity surface heating.
2 kw or an induction coil driven by an inverter that delivered 2 kw.
He suggested that if current flow in the force induction coil changed the paths of the current in the superconductor wires, either nonlinearly or hysteretically, the equality of Eq.
Enercon of 64 Edison Road, Aylesbury, Buckinghamshire, tel:0129 633 0542 tell us this unit is suitable for use with regular, child-resistant and dispensing closures, ranging in diameter from 20 to 110mm, which are hermetically sealed whilst passing under the Superseal induction coil.
specializes in induction heating problem solutions, and offers a variety of services, such as: manufacturing of soft magnetic composites and ready to use concentrators, induction coil design, commercial computer simulation, technical consulting, cooperative technology development, prototyping and experimental validation.
Coil Features:- Low Voltage Induction Coil With Dry Quick-Connect Coupling And Built In Operational Switches I.