[SI-LIST] Re: The current distribution and partial self-inductance

L is an expression of B/H.  Confining a given field, or fraction of a 
filed to a smaller area means a greater B for the fixed H.

Steve.


Kyoungchoul Koo wrote:
> Hi all,
>
>
> I have a question about "partial self inductance".
>
> which is introduced in "Signal integrity : Simplified" by Eric Bogatin.
>
>
>
> By the definition of partial self inductance, (partial self inductance is
> the # of field line loops around a "conductor" per current)
>
> I thought the partial self inductance has only a relationship with the
> amount of current enclosed by the field line loops.
>
>
>
> But this book says("Signal integrity : Simplified" by Eric Bogatin p.160)
> that the partial self inductance varies with the cross-sectional area of
> conductor.
>
> It means if we make the radius of round rod wire larger, the current will
> spread out more and the partial self-inductance will decrease.
>
>
>
> Does the size of cross-sectional area of conductor(the current distribution)
> affects the # of field line loops around a "conductor", if the amount of
> current is fixed?
>
>
>
> Does this make sense with the definition of partial self inductance?
>
> Or do I misunderstand something?
>
>
>
> Thanks in advance
>
>
>
> K.C Koo
>
>
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