When is the efficiency maximum in a transformer

In this theory, we will discuss what is transformer efficiency. We will derive the expression of the maximum efficiency condition. As we all know a transformer is a static electromagnetic energy device, that transfers electrical energy from one circuit to another circuit without change in frequency through a medium of magnetic flux. In the process of energy conversion, a part of the energy is wasted in the form of losses. In a transformer, Frictional and windage losses are not present, as the transformer is a static device.

When compared with iron losses and copper losses, stray load losses and dielectric losses are very small. Therefore, stray load losses and dielectric losses can be neglected. By seeing the efficiency, one can get to know how efficient the transformer is working. Because both output power and input power are measured in terms of kW or Watts.

As both the numerator denominator having the same units. Note: The output power of the transformer is the product of rated voltage and full load current in the secondary side with load power factor. The input power of the transformer is the sum of output power and losses iron and copper losses.

The transformers using oil as coolant are…. In this topic, you study Core Type Transformer. We provide tutoring in Electrical Engineering. View all posts by Electrical Workbook. Your email address will not be published. Load at Maximum Efficiency If we are given full-load kVA of the transformer, iron loss and full-load copper loss, we can always find the load corresponding to maximum efficiency.

The transformers using air as coolant are…. What is Core Type Transformer? Published by. Electrical Workbook We provide tutoring in Electrical Engineering. Leave a Reply Cancel reply Your email address will not be published. The input and output power are measured in the same unit. Its unit is either in Watts W or KW. Consider, the x is the fraction of the full load. The efficiency of the transformer regarding x is expressed as.

The copper losses vary according to the fraction of the load. The efficiency of the transformer along with the load and the power factor is expressed by the given relation:.