Category: Electrical Machine

What is an Ideal Transformer? Working, Phasor Diagram, Formula & Properties

An ideal transformer is the transformer having the following Properties.

  1. The losses are zero (No iron loss, no copper loss).
  2. The primary and secondary winding resistances are zero.
  3. The leakage flux is zero. Therefore all the flux produced by the primary winding is coupled to the secondary.
  4. A small current is required to develop flux inside the core. This happens because the permeability of the core is very large.
  5. The external voltage applied to the primary, V1 is same as the primary induced voltage El. This is because the primary winding resistance is zero and so there is no voltage drop across it.

\[{{E}_{1}}={{V}_{1}}\]

  1. Similarly the voltage induced in the secondary winding (E2) will be equal to the load voltage V2, because the secondary resistance is zero.

\[{{E}_{2}}={{V}_{2}}\]

8. The transformation ratio for an ideal transformer is given by

\[k=\frac{{{E}_{2}}}{{{E}_{1}}}=\frac{{{V}_{2}}}{{{V}_{1}}}\]

  1. Efficiency of an ideal transformer is 100%. This is because there are no losses taking place.
  2. The voltage regulation is That means the secondary voltage will remain constant irrespective of the load current.

Continue reading What is an Ideal Transformer? Working, Phasor Diagram, Formula & Properties

Types of Losses in a Transformer – Copper Loss, Iron Loss, Hysteresis Losses & Eddy current losses

An ideal transformer is loss free. But in the practical transformer there are following losses taking place.

Losses in a Transformer

Figure1: Losses in a Transformer. Continue reading Types of Losses in a Transformer – Copper Loss, Iron Loss, Hysteresis Losses & Eddy current losses

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