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Transformer Engineering, 2nd Edition by S.A. Khaparde, S.V. Kulkarni

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2

Magnetic Characteristics

The magnetic circuit is an important active part of transformers, which transfers electrical energy from one circuit to another. It is in the form of a laminated iron core structure which provides a low reluctance path to the magnetic flux produced by an excited winding. Most of the flux is contained in the core, which reduces stray losses in structural parts. Due to research and development efforts [1] by steel and transformer manufacturers, materials with improved characteristics have been developed and employed with better core building technologies. In the early days of transformer manufacturing, inferior grades of laminated steel (according to today’s standards) were used with associated high losses and magnetizing ...

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