Does copper loss depend on load?
Where, I1 and I2 are current in primary and secondary winding respectively, R1 and R2 are the resistances of primary and secondary winding respectively. It is clear that Cu loss is proportional to square of the current, and current depends on the load. Hence copper loss in transformer varies with the load.
HOW THE determine copper loss in a transformer?
Copper loss in the transformer is measured by the short-circuit test of transformer. … After the short circuit of LVS, a small voltage is applied on H.V side till rated current flow in L.V side. The copper losses are calculated from P = I^2. R.
Why the copper losses are more in a transformer?
The copper loss in the transformer is proportional to the square of the current flowing through the winding. When the load on the transformer is increased the copper loss varies because of the increased current and increased resistance caused by temperature rise.
Why copper loss is variable in a transformer?
1. Copper losses:- when the transformer is loaded, current flows in primary and secondary winding, there is loss of electrical energy due to the resistance of the primary winding, and secondary winding and they are called variable losses.
What are the main losses in a transformer?
A transformer’s output power is always slightly less than the transformer’s input power. These power losses end up as heat that must be removed from the transformer. The four main types of loss are resistive loss, eddy currents, hysteresis, and flux loss.
Which test is used for copper loss in transformer?
Hence, it is seen that the short circuit test gives copper losses of transformer and approximate equivalent resistance and reactance of the transformer.
How can transformer losses be reduced?
Methods to reduce the energy loss in transformer:
- Use of low resistance wire for the winding of the coil.
- Heat loss due to eddy current can be reduced by the lamination of the iron core.
- The heat generated can be kept to a minimum by using a magnetic material which has a low hysteresis loss.
What is rotor copper loss?
The rotor copper loss is calculated by subtracting the stator copper loss from the total measured loss or the rotor I2R loss. The friction and windage loss may be assumed constant, irrespective of the load. Efficiency = Rotor output/stator input. Output = Input – Losses.
Which of the following mentioned losses occur in a transformer?
Which of the following mentioned losses occur in a transformer? Explanation: Hysteresis losses-due to magnetic material; Eddy current losses-on the core area; Dielectric losses- due to insulation material; Stray load losses- due to leakage through the parts of the transformer.