In magnetism:
An eddy current is induced into a metal when magnetic lines of force move across it. A South pole causes circulating current in clockwise direction while a North pole causes current in counter-clockwise direction. These eddy currents thus buck the applied forces. Eddy currents are undesirable when induced into transformer cores causing power loss. Lamination of core material reduces current flow in the core. Current induced into the secondary winding of a transformer is a used to step-up or step-down voltages so that they can be of a correct size for end-use applications.
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When time-varying magnetic field is applied to electrical machines like Transformers, a time-varying emf is induced in the transformer cores. A short circuit occurs at the molecular level in the core. Due to less resistance, a large current begins to flow in the core. This causes heating in the core. Actually the path of the current is circular resembling the circular waves in a pool of water (eddy). Hence these currents are called eddy currents.
In fluids:
In water flow, an eddy is a current that flows opposite the normal flow. If on a river, an eddy is a current that will flow upstream in a side channel filling it, even if the flow is in an opposite direction of the original flow. It is equivalent to a stream's water level rising because the river it feeds has more water in it than the stream, thus making the water flow upstream. It can also be an area that seems not to have a current at all.
A:
Just like there exists a magnetic path due to current (charge) flow in a conductor (direction given by right hand rule), the thing works other way as well...
When there is a flux path crossing a current conducting material, there exists current paths around the flux line on the conductor plane centered to the point where flux line meets the plane. These currents are eddy currents.
Commonly available in magnetic circuits. Laminations are done to minimize the ability to flow eddy currents.
See Related Links below.
An 'eddy' (not 'eddi'!) current is a current that flows in the magnetic circuit (core) of an electrical machine, due to a voltage induced into that core by a changing magnetic field. Eddy currents cause energy losses in electrical machines. To minimise eddy currents and, therefore, their losses, machines use laminated cores which restrict the paths through which eddy currents can flow.
No, the purpose of laminating the core is to reduceeddy-current losses.
eddy current can be reduced by using laminated cores. and also be reducing the thickness of the stampings. transformer iron loss is the combination of eddy current loss and hysterisis loss. both the losses depend on core of the transformer and iron loss is a constant loss.
A: Eddy currents are current losses if an iron bolt is used to hold the core lamination together that alone will cause losses. Usually a brass bolt is used to eliminate losses
as far as i know eddy currents will work on any material as long as the material to be tested is conductive...and it also depends on the penetration to where its being applied
Eddy Current Suppression Ring was created in 2003.
Yes, a transformer has eddy currents.
Alimunium is the best Element, that can be used for the production of eddy current.
An eddy.
That's from an analogy from eddy currents in water. Quoting from the Wikipedia, article "Eddy (fluid dynamics": "In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid flows past an obstacle."
because eddy current is produced by the heat produced in winding
eddy
An eddy.
to reduce the eddy current loss in the machine
112.5
Yes
An eddy or whirlpool.