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Unformatted text preview: L: inductance Unit: henry (H) Li N = Circuit symbols for inductors Values: microhenrys( H) tens of henrys(H) Types: Fixed variable Iron, steel Plastic, air VAR of Inductor dt t di L t v ) ( ) ( = What happens when the current is constant? Integrating form: ) ( ) ( 1 + = t t t i d v L i An inductor acts like a short circuit to dc. The current through an inductor cannot change abruptly (in condition that v is limited). Stored Energy in Inductor 2 ) ( 2 1 ) ( t Li t w = Is inductor active? Equivalent circuit for the series inductors N eq L L L L L + + + + = ... 3 2 1 Equivalent circuit for the parallel inductors N eq L L L L 1 ... 1 1 1 2 1 + + + =...
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 Fall '08
 PingLi

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