eddy current


Also found in: Dictionary, Medical, Acronyms, Wikipedia.
Related to eddy current: Hysteresis loss

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 ?
In general, ferromagnetic tubes cannot be tested using eddy current techniques because the material's high permeability varies a lot and also minimizes penetration depth.
4-6 show the solution of magnetic field density, eddy current density and temperature distribution respectively for certain study case of; 100V input voltage, conductivity=3.
The eddy current clutch uses a fixed electromagnet to avoid the use of carbon brushes and slip rings and enhance clutch reliability.
Minus current density in aircraft skin, as shown in Figure 8, means the eddy current flows in the opposite direction compared with the cable current.
Analysis and Calculation of Eddy Current Loss of Permanent Magnet of Interior Permanent Magnet Motor
The implementation of eddy currents in the industrial sector are proven and established.
The new eddy current method investigated in this paper employs conventional AC bridge techniques (16) to balance out the large baseline signals.
Hence, the emphasis will be placed on eddy current loss in which the loss minimization can be achieved through a number of techniques including well-known technique of selecting lamination thickness.
Said to be the world's smallest inductive rotary encoder, its operating principal is based on the detection of high-frequency inductivity which generates eddy current in an electrically conducted target.
Several approaches have been made to address eddy current losses using alternative non-metallic materials for the rear containment shell, with mixed results
For corrosion detection in aging aircraft panels, the NDI imaging methods, such as eddy current and ultrasound, were studied (Rebbapragada et al.
Based on proven balanced bridge, inductive eddy current technology, the instrument makes high-precision static and dynamic measurements, and supports ambient, moderate temperature, and cryogenic-rated sensors.