What are Practical Transformer ?

A practical Transformer is a type of transformer in which the input power is not equal to the output power. it means there are copper loss and iron loss appearing in the practical transformer.

what are Equivalent Resistance in transformer?

We know that an ideal transformer is a type of transformer in which the input power is equal to the output power which means no losses occur in the transformer but the practical transformer is different to an ideal transformer because the input power is not equal to output power in the practical transformer due to copper losses and iron losses.

what are Equivalent Circuit of an Electrical Transformer?

Let's Suppose The transformer Resistance and Leakage reactance are outside the windings and No load Current Io is flowing in the pure inductance Xo and Non-Inductive resistance Ro.

Practical Transformer

Equivalent Circuit of an Electrical Transformer

A practical Transformer is a type of transformer in which the input power is not equal to the output power. it means copper loss and iron loss appear in the practical transformer.

Input power ≠ output power

Equivalent Resistance

We know that an ideal transformer is a type of transformer in which the input power is equal to the output power which means no losses occur in the transformer. Still, the practical transformer is different to an ideal transformer because the input power is not equal to the output power in the practical transformer due to copper losses and iron losses.

primary and secondary windings have some value of resistance that causes the voltage drop in the practical transformer.

Equivalent Circuit of an Electrical Transformer

The primary winding resistance is R1 and the Secondary winding resistance is R₂. you can easily transfer one resistance to another.

If we need to transfer the secondary winding resistance R₂ toward the primary side simply divide it with K² and it represents R'₂.

R'₂=R₂/k² =equivalent Secondary Resistance

The copper losses of secondary are equal to I²R.

I1²R'₂ = I₂²R₂

R'₂= {I2:I1}²R₂

if we Neglect No load current Io

I₂:I1=1:k

R'₂=R₂/K²

We transfer Equivalent primary resistance toward the secondary

R'₁=R₁K²: equivalent primary Resistance

Equivalent Circuit of an Electrical Transformer

Let's Suppose The transformer Resistance and Leakage reactance are outside the windings and No load Current Io flows in the pure inductance Xo and Non-Inductive resistance Ro.