solenoid

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solenoid

(sō`lənoid'), device made of a long wire that has been wound many times into a tightly packed coil; it has the shape of a long cylinder. If current is sent through a solenoid made of insulated wire and having a length much greater than its diameter, a uniform magnetic field will be created inside the solenoid. This field can be intensified by inserting a ferromagnetic core into the solenoid. See electromagnetelectromagnet,
device in which magnetism is produced by an electric current. Any electric current produces a magnetic field, but the field near an ordinary straight conductor is rarely strong enough to be of practical use.
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; magnetismmagnetism,
force of attraction or repulsion between various substances, especially those made of iron and certain other metals; ultimately it is due to the motion of electric charges.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Solenoid

 

an electrically energized coil that is usually in the form of an insulated wire wound on a cylindrical surface. If the length of the coil is substantially longer than the diameter, the magnetic field in the middle of the coil is uniform and is directed parallel to the axis of the coil. The field strength in this central part is proportional to the current and (approximately) to the number of turns. The external magnetic field of a solenoid is similar to the field of a bar magnet (see Figure 1, p. 256). When the coil has an iron core, the solenoid constitutes an electromagnet.

Figure 1. Lines of force of the magnetic field of a solenoid

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

solenoid

[′säl·ə‚nȯid]
(electromagnetism)
Also known as electric solenoid.
An electrically energized coil of insulated wire which produces a magnetic field within the coil.
In particular, a coil that surrounds a movable iron core which is pulled to a central position with respect to the coil when the coil is energized by sending current through it.
(meteorology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

solenoid

1. a coil of wire, usually cylindrical, in which a magnetic field is set up by passing a current through it
2. a coil of wire, partially surrounding an iron core, that is made to move inside the coil by the magnetic field set up by a current: used to convert electrical to mechanical energy, as in the operation of a switch
3. such a device used as a relay, as in a motor vehicle for connecting the battery directly to the starter motor when activated by the ignition switch
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

solenoid

A mechanical switch that is activated by a magnetic coil. It is used to open and close an electric circuit, open or close a valve in a fluid pipe or cause some mechanical action to be triggered.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Those who had not yet completed algebra did not recognize the types of variation, but were able to numerically predict magnetic field strength for different solenoids, even for those that they did not have (e.g., a solenoid wrapped with 200 coils would have a magnetic field strength of 144 Gauss).
The new starter solenoid parts offer OE quality for select vehicles from Ford, Hitachi, Mitsubishi, Nissan, Acura and others.
damping, magnetic levitation, magnetic repulsion, solenoid.
Most solenoid valves operate at 24VDC so either two 12V batteries in series or a 24VAC adapter is required.
Clearly we are not dealing with 'infinite' solenoids and therefore the external (leakage) field has to be taken into account.
"Mechetronics brings extensive experience in the design of industrial solenoids, including manufacturing in China and complements our aerospace and defence solenoid business in North America and Europe."
Solenoids are the preferred choice in access doors, centrifuge locks, sterilizer door locks, and position locks for medical instruments, and are perfect for small, light locking loads.
It times the firing of the solenoids to produce the dot matrix characters.
A solenoid is used as a magnetic shutter for this neutron guide.
The Trombetta engineers sought to eliminate common problems they regularly see with work solenoids on industrial equipment, as well as simplify existing systems consisting of solenoids, controls, and the wire harnesses connecting them.
The image at top left shows proper operation, with three solenoids radiating heat.
In the engine room, Marcotullio says that SRI's polymers offer the potential of achieving what solenoids have been unable to do--a camless engine.