This lesson covers the concept of core losses in electrical machines, focusing on hysteresis and eddy current losses. It explains how these losses occur, the factors they depend on, and how they can be minimized. The lesson also introduces the empirical formula for calculating hysteresis loss and discusses the importance of the area enclosed by the BH curve. It further explains the role of the magnetizing branch in determining the maximum flux and how the core loss resistance should be connected in parallel with the magnetizing reactance. An example of a practical transformer is used to illustrate these concepts.

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