eddy current

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Related to Eddy-current: Eddy-current brake, Eddy-current testing

Eddy current

An electric current induced within the body of a conductor when that conductor either moves through a nonuniform magnetic field or is in a region where there is a change in magnetic flux. It is sometimes called Foucault current. Although eddy currents can be induced in any electrical conductor, the effect is most pronounced in solid metallic conductors. Eddy currents are utilized in induction heating and to damp out oscillations in various devices.

It is possible to reduce the eddy currents by laminating the conductor, that is, by building the conductor of many thin sheets that are insulated from each other rather than making it of a single solid piece. The laminations do not reduce the induced emfs, but if they are properly oriented to cut across the paths of the eddy currents, they confine the currents largely to single laminae, where the paths are long, making higher resistance.

eddy current

[′ed·ē ‚kə·rənt]
(electromagnetism)
An electric current induced within the body of a conductor when that conductor either moves through a nonuniform magnetic field or is in a region where there is a change in magnetic flux. Also known as Foucault current.

Eddy current

An electric current induced within the body of a conductor when that conductor either moves through a nonuniform magnetic field or is in a region where there is a change in magnetic flux. It is sometimes called Foucault current. Although eddy currents can be induced in any electrical conductor, the effect is most pronounced in solid metallic conductors. Eddy currents are utilized in induction heating and to damp out oscillations in various devices.

It is possible to reduce the eddy currents by laminating the conductor, that is, by building the conductor of many thin sheets that are insulated from each other rather than making it of a single solid piece. The laminations do not reduce the induced emfs, but if they are properly oriented to cut across the paths of the eddy currents, they confine the currents largely to single laminae, where the paths are long, making higher resistance. See Core loss

References in periodicals archive ?
Supply of automatic eddy-current system to control the metal of the heat exchanging tubes and collector ligament of steam generator PGV-1000 and related materials, including submission of the technical documents, manufacturing, conduction of factory acceptance and handover acceptance tests, supply, incoming control, installation supervision, adjustment monitoring, participation in the acceptance tests within the nuclear facility, special training of the
The North American electromagnetic NDT equipment market is segmented on the basis of various NDT methods, namely, eddy-current testing, remote field testing, magnetic flux leakage testing, and Alternating Current Field Measurement.
Mandache, Study of lift-off invariance for pulsed eddy-current signals, IEEE Transactions on Magnetics, Vol.
The company has expanded its product offering to include eddy-current displacement sensors and some application specific sensors for the machine tool, packaging and PCB industries.
VALLI, The Coulomb gauged vector potential formulation for the eddy-current problem in general geometry: well-posedness and numerical approximation, Comput.
This company developed a tandem setup for their line of Eddy-Current (WB) and Powder Brake (PB) dynamometers to facilitate torque and speed range extension.
The MP0D comes in three models: the Isoscope MP0D, which uses the eddy-current method to measure nonconductive coatings on nonferrous metals and anodic coatings on aluminum; the Permascope MP0D, which uses the magnetic-induction method to measure nonferrous metal coatings and nonconductive coatings on iron and steel; and the Dualscope MP0D, which incorporates both methods to measure coatings on nonferrous metals as well as on iron and steel (automatically recognizing the base material and using the appropriate measurement method, according to Fischer).
Development of a High-Frequency Eddy-Current Separator;" EMPS Corp.
There are four: eddy-current, ultrasonic, laser, and video.
This latest addition allows analysis of a variety of applications, including transformers, electric motors, induction machines, eddy-current braking systems, induction heating, and circuit breakers.
com)-- To support designers requiring multichannel displacement sensing in a compact package, Lion Precision has released the ECL150 Eddy-Current Displacement Sensor.