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Unformatted text preview:  = 1 X x A A c g ECE 3070 H OMEWORK #2 F ALL 2007 D UE : S EPTEMBER 19 1. A magnetic circuit with a single air gap is shown below. The core dimensions are: Crosssectional area A c = 1.8 x 10 3 m 2 Mean core length = 0.6 m Gap length, g = 2.3 x 10 3 m N = 83 turns Assume that the relative permeability of the core is 2500, and neglect the effects of fringing fields at the air gap and leakage flux. a) Calculate the reluctance of the core and that of the gap. For a current of i = 1.5 A, calculate, b) the total flux, Φ , c) the flux linkages, λ, . of the coil, and d) the coil inductance, L. 2. The magnetic circuit below consists of a core and a moveable plunger of width l p , each of permeability, μ . The core has crosssectional area A c , and mean length, l c . The overlap area of the two air gaps, A g , is a function of the plunger position x and can be assumed to vary as, You may neglect any fringing fields at the air gap and use approximations consistent with...
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This note was uploaded on 02/20/2010 for the course ECE 3070 taught by Professor Harley during the Spring '09 term at Georgia Tech.
 Spring '09
 Harley

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