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)*(B²max)*(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)*(Bmax1.6)*(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.