MAGNETIC CIRCUITS AND CORE LOSSES

PREPARED BY EE IIT, Kharagpur

Contributors:  Dr.T.K. Bhattacharya,
                          Prof. N.K. De,
                          Prof. G.D. Ray

Goals of the lesson
In this lesson, we shall acquaint the reader, primarily with the basic concepts of magnetic circuit and methods of solving it.
Biot-Savart law for calculating magnetic field due to a known current distribution although fundamental and general in nature, requires an integration to be evaluated which sometimes become an uphill task. Fortunately, due to the specific nature of the problem, Ampere’s circuital law (much easier to apply) is adopted for calculating field in the core of a magnetic circuit. You will also understand the importance of B-H curve of a magnetic material and its use. The concept and analysis of linear and non linear magnetic circuit will be explained. The lesson will conclude with some worked out examples.
Key Words: mmf, flux, flux density, mean length, permeability, reluctance.         

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