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Lamination of the iron core is used to reduce eddy current due to?
Wiki User
∙ 14y ago
The laminations on the core of a transformer are actually insulated from each other. This means that there is no circuit for current to flow, but since the laminations are stacked in an alternating orientation, there is magnetic coupling.
If the core were one piece, or the laminations where allowed to touch each other electrically, there would be current flow, i.e. eddy current flow, because the core would represent a one turn secondary that is shorted. This means low voltage, but high current capacity. This means power loss, and degradation of Q and efficiency in the transformer.
Wiki User
∙ 14y ago
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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.
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
What are uses of transformer's lamination?
Presumably, you are asking "What is the function of transformer laminations?", rather than their "uses".A transformer's magnetic circuit, or core, is made from thin sheets of silicon steel, each insulated from each other, and termed laminations.The alternating current flowing through a transformer's primary winding not only induces a voltage into the secondary windings, but into the core itself, resulting in circulating currents, called eddy currents, which result in energy losses. The very low cross-sectional area of each lamination acts to offer a high resistance to the flow of these eddy currents, thus minimising these currents, and the associated eddy-current losses.
Why is the core is laminated alternatively in motor?
Cores are laminated to reduce circulating currents, called 'eddy currents', which are caused by voltages induced into the core. As each lamination is effectively insulated from its neighbours, its cross-sectional area and, thus, its resistance is increased. Additionally, the voltage induced into each lamination is much lower than would be induced into an unlaminated core -so, the combination of lower induced voltages and higher resistances significantly reduce energy losses in the core.
How do you reduce core losses in distribution transformer?
Reducing core losses is a design responsibility of the manufacturer. They do this by laminating the core (to reduce eddy-current losses) and carefully selecting the type of material used for the core (to reduce hysteresis losses). There's very little that you, as the user, can do about reducing core 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.
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
Why armature core is laminated in dc machine?
to reduce the eddy current loss in the machine
I need to make a 72VA 220-12V DC Transformer. The drawing gives me 158 lamination and I need to use 133. How do you convert a 158 lamination to 133 lamination?
There is no such thing as a 'd.c. transformer'. If this is a typo, and you really mean an 'a.c. transformer', then the number of laminations will act to reduce the eddy-current losses within the core, but should not affect the turns ratio of your transformer if that's what you are trying to achieve.
What are uses of transformer's lamination?
Presumably, you are asking "What is the function of transformer laminations?", rather than their "uses".A transformer's magnetic circuit, or core, is made from thin sheets of silicon steel, each insulated from each other, and termed laminations.The alternating current flowing through a transformer's primary winding not only induces a voltage into the secondary windings, but into the core itself, resulting in circulating currents, called eddy currents, which result in energy losses. The very low cross-sectional area of each lamination acts to offer a high resistance to the flow of these eddy currents, thus minimising these currents, and the associated eddy-current losses.
Why is the core is laminated alternatively in motor?
Cores are laminated to reduce circulating currents, called 'eddy currents', which are caused by voltages induced into the core. As each lamination is effectively insulated from its neighbours, its cross-sectional area and, thus, its resistance is increased. Additionally, the voltage induced into each lamination is much lower than would be induced into an unlaminated core -so, the combination of lower induced voltages and higher resistances significantly reduce energy losses in the core.
How do you reduce core losses in distribution transformer?
Reducing core losses is a design responsibility of the manufacturer. They do this by laminating the core (to reduce eddy-current losses) and carefully selecting the type of material used for the core (to reduce hysteresis losses). There's very little that you, as the user, can do about reducing core losses.
What is the purpose of blow out coil with laminated core in ac power contactor?
The laminations reduce a core loss called Eddy Currents, which are set up in the core by the ever changing AC current.
Why are stripes of iron plates joined instead of using a single block of iron core in a transformer?
To reduce heat generated and eddy current losses in transformer's core during operation.
What can be done to minimize eddy current losses?
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"
Can solid cores be used in transformers?
Yes but a solid core is not recommended because it allows large eddy currents to flow, which greatly increases the power losses in the iron core.That is why a core is usually made from insulated iron stampings.Another AnswerNo. A solid core would get very hot and damage the windings' insulation. As far as the primary winding is concerned, the core is simply another winding -a single-turn winding. So a large circulating current ('eddy current') will be set up within the core, leading to a large energy loss ('eddy current loss'). Laminating the core restricts eddy currents to flow within each lamination which, because of their small cross-sectional area, means that the eddy currents will be very small, and the losses also very small. The eddy current losses are inversely-proportional to the square of the number of laminations (approximately. anyway) so, say, 100 laminations mean that the losses will be 10 000 times lower than for a solid core.
Does a laminated iron core increase eddy current losses?
No, the purpose of laminating the core is to reduceeddy-current losses.
