From: rertman@ix.netcom.com
Date: Mon Jul 19 2004 - 08:16:51 PDT
True, John, but an inductor whose +jX is hundreds of ohms at 60 Hz is BIG. I was
thinking of small components in a vehicle.
Dick
"J. Forster" wrote:
>
> rertman@ix.netcom.com wrote:
>
> > In AC power circuits where the frequency is
> > low (60 Hz) the impedance is essentially the same as the DC resistance.
> >
> > Dick
> >
>
> Absolute not true. An inductor can have a DC resistance of an ohm or two and a reactance of
> tens or hundreds of an ohm at 60 or 400 Hz. An inductor with a reactance of Z ohms at 60
> Hz will have a reactance of approximately 400/60 x Z ohms at 400 Hz.. Also, reactance can
> be either inductive or capacitive. Motors are much more complicated because their
> reactance is a function of speed.
>
> -John
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