Understanding the Major Types of Losses in a Transformer
Transformers play a crucial role in electrical power systems by transferring energy between circuits while maintaining efficiency and reliability. Although transformers are highly efficient devices, they are not completely loss-free. During operation, a small portion of electrical energy is always lost in different forms. Understanding transformer losses helps engineers improve efficiency, reduce operating costs, and optimize system performance. One of the most common losses is copper loss. This occurs in transformer windings due to the resistance of conductors carrying electrical current. As load current increases, copper losses also increase because they are directly related to the square of the current flowing through the winding. Another important category is core loss, often referred to as iron loss. These losses occur within the transformer core and remain present whenever the transformer is energized, regardless of load conditions. Core losses mainly consist of hysteresis l...