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Changing magnetic field causes to produce eddy currents that are confind within the core of transformer. these are like circulating whirls inside the core. these can be eliminated by making the core of thin layers. "Eddy current losses occur whenever the core material is electrically conductive. Most ferromagnetic materials contain iron: a metal that has fairly low resistivity (roughly 10-7 Ω m). The problem is intuitively obvious if you consider that the magnetic field is contained within a 'circuit' or loop formed by the periphery of the core in the same way as it is contained within a turn on the windings. Around that periphery a current will be induced in the same way as it is in an ordinary turn which is shorted at its ends"
What else can I help you with?
What are the advantages of shell type transformers?
this type of transformer used special low loss steel to minimize eddy current losses and reduced leakage flux.
What is the equation for calculating eddy current losses?
F^2into Bm^2
Eddy current in transformer?
Yes, a transformer has eddy currents.
Why don't we use one piece for transformer core?
If, by 'one piece', you mean solid -as opposed to laminated- then the answer is that a solid core will have significantly-higher eddy current (circulating current) losses than a solid core.
Why eddy current damping is not used in moving iron instruments?
because eddy current is produced by the heat produced in winding
How do you minimize core losses?
Hysteresis and eddy current loss constitute core loss. It can be reduced by replacing solid core by laminated core... by adeeb
What are the advantages of shell type transformers?
this type of transformer used special low loss steel to minimize eddy current losses and reduced leakage flux.
Does a laminated iron core increase eddy current losses?
No, the purpose of laminating the core is to reduceeddy-current losses.
Why laminations are used for iron parts of a dc machine?
Laminations minimize eddy currents, or current flow across the iron parts. This is one method to minimze stray losses.
How is eddy current related to the thickness of the stampings of core?
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
How eddy current losses andhysterious losses can be reduced?
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.
What is eddi current?
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.
What is the equation for calculating eddy current losses?
F^2into Bm^2
Core loss of an induction motor?
Just like a transformer, the core losses are a combination of eddy current losses and hysteresis losses.
What are the methods to minimize the Eddy current?
Eddy currents can be minimized through several methods, including the use of laminated magnetic cores, which reduce the cross-sectional area available for current flow. Implementing non-conductive materials or insulating coatings can also prevent the formation of eddy currents. Additionally, designing components with higher resistivity and using thinner sheets of conductive materials further decrease eddy current losses. Finally, employing alternating magnetic fields at higher frequencies can help limit eddy current generation in conductive materials.
What are the different kinds of losses in machines?
stray losses,armature copper losses,iron losses(Hysteresis and eddy current losses),mechanical losses(friction and windage losses)
On what factors does the eddy current loss depend?
Eddy current loss depends primarily on the material's electrical conductivity, the frequency of the alternating current, and the thickness of the conductive material. Higher conductivity and frequency increase the eddy currents generated, leading to greater energy losses. Additionally, thicker materials result in larger eddy currents, further amplifying the losses. The loss can be minimized by using laminated cores or materials with lower conductivity.
