### Measurement of Transformer Losses

Transformer consist of two main important losses such as Copper losses (PC) and Core/Iron (Pi) losses.

Core loss consist of two losses like- Eddy Current loss and Hysteresis loss.

So here, I am introducing important for formulas for calculation of transformer losses.

**1. Calculation of Copper Loss:**

Copper losses occurs in the transformer windings (from primary winding and secondary winding ).

Copper Loss, (Pc) = [(I²1*R1)+(I²2*R2)] (Unit- Watt)

Where,

- I1- Primary Current (Source Current)
- R1- Primary Ohmic Resistance
- I2- Secondary Current (Load Current)
- R2- Secondary Ohmic Resistance

**2. Calculation of Eddy Current Loss:**

Eddy current loss is measured by using the maximum flux core density (Bm), frequency (f) and lamination thickness (t).

Formula as,

Eddy Current loss, (Pe)= [(ηe)*(B²_{max})*(F)²*(t)²] (Unit- Watt)

Where, (ηe)- Constant of eddy current loss.

**3. Calculation of Hysteresis Loss:**

Hysteresis loss is measured by using the maximum flux core density (Bm), frequency (f) and core volume.

Formula as,

Hysteresis loss, (Ph)= [(ηh)*(B_{max}^{1.6})*(F)*(V)] (Unit- Watt)

Where, (ηh)- Constant of hysteresis loss.

**4. Calculation of Total Core or Iron Loss:**

Total core/iron loss is the combination of the eddy current loss (Pe) and hysteresis loss (Ph) in transformer.

Total Core Loss, (Pi)= (Pe + Ph) (Unit- Watt)

These are the different types of transformer losses formula.

You can easily find out the different types of transformer losses by using these the above online calculator.