Lecture 3

Lecture 3 - Inductance UCF B I Φ= ∫∫ B ⋅ dS Flux...

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Unformatted text preview: Inductance UCF B I Φ= ∫∫ B ⋅ dS Flux linkage λ = NΦ NI NΦ L= = I I NI Φ= Rtotal 2 N total L= Rtotal λ UCF Example 1 UCF Example 2 UCF Example 3 μr=2000 2000 5% cross-section increase for fringing in airgap Find: (a) total reluctance of the flux path; ( ) (b) current required to produce B = 0.5 T in the air gap; q p g p; (c) inductance of the coil. UCF Example 4 N = 400, A = 150 cm2 lc = 55 cm M5 St l at DC Steel t (1) How much is current required to produce 0.016Wb of flux in the core? (2) What is core s relative permeability at that current level? core’s (3) What is its reluctance and inductance at this level? ...
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Lecture 3 - Inductance UCF B I Φ= ∫∫ B ⋅ dS Flux...

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