> Figure 1 shows a ferromagnetic core whose mean path length is 40 cm. There is a small gap of 0.05 cm in the structure of the otherwise whole core. The cross-sectional area of the core is 12cm?, the relative permeability of the core is 4000 and the coil of wire on the core has 400 turns. Assume that fringing in the air gap increases the effective cross-sectional area of the air gap by 5 percent. Given this information. Find the total reluctance of the flux path (iron plus air gap) and the current required to produce a flux density of 0.5 T in the air gap. N-400 tuma 0.05 cm A-12 em l-40 cem Figure 1

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> Figure 1 shows a ferromagnetic core whose mean path length is 40 cm. There is a
small gap of 0.05 cm in the structure of the otherwise whole core. The cross-sectional
area of the core is 12cm2, the relative permeability of the core is 4000 and the coil of
wire on the core has 400 turns. Assume that fringing in the air gap increases the
effective cross-sectional area of the air gap by 5 percent. Given this information.
Find the total reluctance of the flux path (iron plus air gap) and the current
required to produce a flux density of 0.5 T in the air gap.
N=400
tums
0.05 cm
A=12 cm?
le-40 cm
Figure 1
Transcribed Image Text:> Figure 1 shows a ferromagnetic core whose mean path length is 40 cm. There is a small gap of 0.05 cm in the structure of the otherwise whole core. The cross-sectional area of the core is 12cm2, the relative permeability of the core is 4000 and the coil of wire on the core has 400 turns. Assume that fringing in the air gap increases the effective cross-sectional area of the air gap by 5 percent. Given this information. Find the total reluctance of the flux path (iron plus air gap) and the current required to produce a flux density of 0.5 T in the air gap. N=400 tums 0.05 cm A=12 cm? le-40 cm Figure 1
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