How can the frequency of a transformer be increased?

Frequency can never be changed with the help of a transformer. Transformer is a static device which just transfer energy with some change in voltage and current(anyway power is same …it goes with the basic law of energy conservation).

What is the purpose of laminating the core in a transformer?

The iron core of a transformer is laminated with the thin sheet; the laminated iron core prevents the formation of eddy currents across the core and thus reduces the loss of energy.

Why does lamination decrease eddy current?

Lamination is made to decrease the eddy current loss by enhancing the resistance of the core. The planes of these sheets are located perpendicular to the current’s direction that the produced emf would set up. The planes of these sheets are organized parallel to the magnetic fields to cut beyond the eddy current ways.

How does change in frequency affect the operation of a given transformer?

So if frequency increases, the secondary voltage or emf increases. And secondary voltage decreases by the reduction of supply frequency. But with high frequency there is increase in transformer losses like core loss and conductor skin effect.

Why as frequency increases the size of transformer decreases?

For given emf, if frequency is increased then flux requirement reduces hence size of transformer reduces. The higher the frequency, the less the magnetic flux of the transformer, the smaller the core section of the transformer under the same magnetic density, and the smaller the size of the corresponding transformer.

Why transformer size reduces with increase in frequency?

For a given Transformer Rating, as the frequency increases, the product of window area and cross-sectional area of the limb decreases; this means the size of the Transformer core and the amount of iron required for the core decreases.

How the loss of power in a transformer can be reduced?

Increasing the number of turns in primary. Increasing ac voltage applied to primary. Using a solid core made of steel.

What is the effect of frequency variation on power transformer?

Power transformers are not ordinarily subjected to frequency variations and usually are subject to only modest voltage variations, but it is interesting to consider the effects thereof. Variations in voltage and/or frequency affects the iron losses (hysteresis and eddy current losses) in a transformer.

How much increase in voltage can be tolerated at higher frequencies?

Some increase in voltage could, therefore, be tolerated at higher frequencies, but exactly how much depends on the relative magnitude of the hysteresis and eddy current losses and the grade of iron used in the transformer core. Example 1: A 1 kVA, 220/110, 400 Hz transformer is desired to be used at a frequency of 60 Hz.

How does voltage and frequency affect the iron losses in Transformers?

Variations in voltage and/or frequency affects the iron losses (hysteresis and eddy current losses) in a transformer. As long as the flux variations are sinusoidal with respect to line, hysteresis loss (P), and eddy current loss (P) varies according to the following relations

What happens to the flux density of a transformer when voltage changes?

If the transformer is operated with the frequency and Voltage changed in the same proportion, the flux density will remain unchanged as obvious from Eq. (10.2) and apparently the no-load current will also remain unaffected. The transformer can be operated safely at frequency less than rated one with correspondingly reduced voltage.

https://www.youtube.com/watch?v=1TsAs8auv4M