Electrical

  Hysteresis loss and Eddy current loss              and their difference In electric machines, a varying magnetic field causes eddy currents in all metallic parts and hysteresis in ferromagnetic core. The losses caused due to eddy currents are known as eddy current loss and that caused due to hysteresis is known as hysteresis loss. In the following sections, we will learn, eddy currents, the phenomenon of hysteresis, hysteresis, and resulting losses in detail. You will be able to understand eddy current losses, hysteresis losses, factors affecting them, and ways to reduce them. ·           Eddy Currents o     What are eddy currents? o     Eddy current loss o     Derivation of expression for eddy current loss o     Formula for eddy current loss o     Reduction of eddy current loss ·   ...

  Parts Of A Transformer       Transformers are used to transfer electrical energy from one circuit to another through electromagnetic induction. They are used either to step up or step down voltage levels. A transformer is made of several different parts that function in their own different ways to enhance the overall functioning of a transformer. These include core, windings, insulating materials, transformer oil, tap changer, conservator, breather, cooling tubes, Buchholz Relay and explosion vent. The core, windings, insulating materials and transformer oil are seen in almost every transformer, while the other components are seen in transformers that are more than 50 KVA. Core The core of the transformer is used to support the windings. It is made of soft iron to reduce eddy current loss and Hysteresis loss, and provides low reluctance path to the flow of magnetic flux. The diameter of a transformer’s core is directly proportional to copper loss an...