Magnetic Circuit

Problem Statement

Problem 2.16 from Electric Machinery and Transformers, 3rd ed:

A magnetic circuit is given in Figure P2.16. What must be the current in the 1600-turn coil to set up a flux density of 0.1 T in the air-gap? All dimensions are in centimeters. Assume that magnetic flux density varies as $B=[1.5H/(750+H)]$.<ref>Guru and Huseyin, Electric Machinery and Transformers, 3rd ed. (New York: Oxford University Press, 2001), 129.</ref>

Solution

First, we note that the problem statement is incomplete. Assume that the distance from the corner at c to the corner at h is 30 cm, giving a total device width of 80 cm. Further assume that the core has a relative permeability of 500. Also, as recommended in the text, we will neglect fringing.

We must now work backward from the air-gap, since the value of the flux-density is given there.

References

<references />