coil

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coil:

see inductorinductor,
electric device consisting of one or more turns of wire and typically having two terminals. An inductor is usually connected into a circuit in order to raise the inductance to a desired value.
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; solenoidsolenoid
, 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
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.

Coil

One or more turns of wire used to introduce inductance into an electric circuit. At power line and audio frequencies a coil has a large number of turns of insulated wire wound close together on a form made of insulating material, with a closed iron core passing through the center of the coil. This is commonly called a choke and is used to pass direct current while offering high opposition to alternating current.

At higher frequencies a coil may have a powdered iron core or no core at all. The electrical size of a coil is called inductance and is expressed in henries or millihenries. In addition to the resistance of the wire, a coil offers an opposition to alternating current, called reactance, expressed in ohms. The reactance of a coil increases with frequency. See Inductor

coil

[kȯil]
(control systems)
Any discrete and logical result that can be transmitted as output by a programmable controller.
(electromagnetism)
A number of turns of wire used to introduce inductance into an electric circuit, to produce magnetic flux, or to react mechanically to a changing magnetic flux; in high-frequency circuits a coil may be only a fraction of a turn. Also known as electric coil; inductance; inductance coil; inductor.
(science and technology)
An arrangement of flexible material into a spiral or helix.

Coil

One or more turns of wire used to introduce inductance into an electric circuit. At power line and audio frequencies a coil has a large number of turns of insulated wire wound close together on a form made of insulating material, with a closed iron core passing through the center of the coil. This is commonly called a choke and is used to pass direct current while offering high opposition to alternating current.

At higher frequencies a coil may have a powdered iron core or no core at all. The electrical size of a coil is called inductance and is expressed in henries or millihenries. In addition to the resistance of the wire, a coil offers an opposition to alternating current, called reactance, expressed in ohms. The reactance of a coil increases with frequency. See Inductor, Reactor (electricity)

heat exchanger

A device designed to transfer heat between two physically separated fluids; generally consists of a cylindrical shell with longitudinal tubes; one fluid flows on the inside, the other on the outside.

coil

1. an electrical conductor wound into the form of a spiral, sometimes with a soft iron core, to provide inductance or a magnetic field
2. the transformer in a petrol engine that supplies the high voltage to the sparking plugs
References in periodicals archive ?
Nor could these effects be produced by a third magnetic coil placed directly above the head of the test subject and connected to a second magnetic coil through an amplifier with the second magnetic coil receiving magnetic pulses from a first magnetic coil after the said magnetic pulses first passed through the anaesthetic sample.
As part of the survey, a helicopter will fly about 90 metres above the ground with a magnetic coil hanging 60 metres below.
Achieving WEST require major changes in the internal parts of the machine by installing a magnetic coil up and down to create a point X with associated tungsten targets and implementation of new diagnoses (experimental and operational instrumentation tokamak).
The bottom plate is lined with permanent magnets and the top (forcer) plate is lined with iron-core magnetic coils.
The idea is to combine spherical tokamaks with high-temperature superconductors to overcome the problems created by pumping millions of amps through copper magnetic coils.
One of the teams, led by UW professor of aeronautics and astronautics Thomas Jarboe, is building a spheromak device, in which the magnetic fields are created by driving electrical currents into the plasma itself, rather than by external magnetic coils.
In the same month, Scania also unveiled plans to begin testing wireless charging systems for buses by placing magnetic coils beneath bus stops and equipping the vehicles with induction coils to recharge the battery within minutes.
In addition, ITER Director-General Osamu Motojima and the Head of the Korean Domestic Agency, Kijung Jung, signed a Procurement Arrangement for the AC/DC converters feeding ITER'S magnetic coils.
The design of some components, such as some of the magnetic coils, was changed.
Depending on how the individual magnetic coils are phased, they can interact to create force that does not generate rotational torque, or they can create force which does drive rotation.
The magnetic coils were wound in square shapes; based on a 3-meter side length for the Alpha coils, the length of silver strip used in each (about 300 meters; see below) and the magnetic-field strength of 0.