A series magnetic circuit comprises of three sections
(i) length of 80 mm with cross sectional area 60 mm2,
(ii) length of 70 mm with cross-sectional area of 80 mm2 and
(iii) Ar Gap 491...L' Figure 2: Magnetic Core and air-gap of length 0.5 mm with cross-sectional area of 60 mm2. Sections (i) and(ii) are of a material having magnetic characteristics given by the following table. Draw the B-H in order to estimate H for the values of B not given in the table Determine the current necessary in a coil of 4000 turns wound on section (ii) to produce a flux of density of 0.7 Tesla in the air-gap. Neglect magnetic leakage
H (AT/m) 100 210 340 500 800 1500
B (Tesla) 0.2 0.4 0.6 0.8 1 1.2