Electrical Engineering ⇒ Topic : Magnetic Calculations From B-H Curves

Magnetic Calculations From B-H Curves

The solution of magnetic circuits can be easily obtained by the use of B-H curves. The procedure is as under

(I) Corresponding to the flux density B in the material, find the magnetising force H from the B-H curve of the material.

(ii) Compute the magnetic length l.

(Ill) m.m.f. required = H x l.

                                                       figure (a)

The reader may note that the use of B-H curves for magnetic calculations saves a lot of time. Fig. (a) shows the B-H curves for sheet steel, cast steel and cast iron