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The efficiency of a transformer depends on its design and is equal to the power output divided by the power input. The difference between these two quantities is the power loss, which comes out in the form of heat.
The power loss has two components, which are the power lost in the resistance of the windings, known as the copper loss, and the power lost in eddy currents in the magnetic core, the iron loss.
The copper loss depends on the current, while the iron loss depends on the voltage.
To increase the efficiency the designer can use thicker wire and a more massive iron core. Both these measures increase the size and cost of the transformer.
Small Transformers for electronic equipment might have efficiency of 80-90%, while power transformers used in electricity supply might have efficiency of 98%. It is necessary to use higher efficiency at the higher power levels because the amount of energy wasted is significant.
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What is the efficiency of a transformer?
The "all day" efficiency of a transformer is defined as the ratio of energy out/energy in for a given all day cycle.
When is the efficiency maximum in a transformer?
the efficiency is maximum in a transformer when no load loss is equal to load loss.
How do you find the maximum amp draw on a step up transformer?
It depends on the load. A good transformer has over 90% (some as high as 99%) efficiency. So the power drawn by it is a function of the power in the load, plus a small amount due to losses in the transformer.
Why the efficiency of induction motor is less than that of transformer?
Because, the losses of IM is more due to the contribution of friction losses at shaft bearings and wind age losses in rotor air gap, this reduces the efficiency of the equipment, Since transforms is a static equipment zero mechanical loss so efficiency of the equipments in high .
How will be conduct test on transformer?
Short circuit test and open circuit test are widely used to test the efficiency of the transformer.
