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 ?
The focus, focal length, and alignment of the beam can be easily varied by electromagnetic coils, and a variety of beam patterns can be created--for example, zig-zag patterns for creating special area effects for surface heat treating.
348 Superconductors Developed to Meet Demanding Operating Conditions for Electromagnetic Coils - the Key Component of Most Power Applications
4-millimeter (mm) wide, 2G HTS wire, fabrication and testing of electromagnetic coils utilizing this wire, and new record 2G wire performance levels.
The new instrument incorporates an electromagnetic coil built with HTS wire in order to increase its versatility and lower its operating costs relative to similar systems that utilize copper or low temperature superconductor wire.
Superconducting Magnetic Energy Storage or SMES, is American Superconductor's patented means of storing large quantities of electricity in a superconducting electromagnetic coil until needed as an electric power supplement.
The flow of current in the superconductor wire making up an electromagnetic coil creates a magnetic field that enables the device to operate.
When current is applied to an electromagnetic coil inside the damper's piston, the resulting magnetic field changes the rheology (or resistance to flow) of the fluid, which produces a mechanically simple but very responsive and controllable damping action without any valves.
The company anticipates introducing a series of HTS wire and electromagnetic coil products over the next one to four years for use in power transmission cables, motors, transformers and power quality equipment.
By controlling the current to an electromagnetic coil inside the piston of the damper, the MR fluid's resistance to flow can be changed.
Current applied to an electromagnetic coil inside the damper's piston varies the rheological properties of the fluid, producing a mechanically simple, but very responsive and controllable damping action.
There is an electromagnetic coil in the piston that generates a flux; orientation of the magnetic particles in the fluid is predicated on whether the coil is active and how strong a magnetic field is generated.

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