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Re: AC coil resistance equation

That by itself gets so close that why you worry about phase and pathagorams,
a simple but slight adjustment of the rotor, and it's there, plain and
simple.

I know the equation, but those are used when your designing a circuit that
will run without mainence, and has no variables.  Changing the rotor speed
can very easily lower the output power, and resolve a overheating problem,
by switching to a higher frequency.  If these hand wound coils, are pushed
to the limits of machine perfection, they will consistantly produce hot
spots.  So, in my belief a working coil is better than a smoking coil.


-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Friday, August 28, 1998 7:21 AM
Subject: Re: AC coil resistance equation


>Original Poster: "bmack" <bmack-at-frontiernet-dot-net>
>
>
>From: "bmack" <bmack-at-frontiernet-dot-net>
>
>----------
>> From: Tesla List <tesla-at-pupman-dot-com>
>> To: tesla-at-pupman-dot-com
>> Subject: Re: AC coil resistance equation
>> Date: Thursday, August 27, 1998 9:46 PM
>>
>>
>> From: "James" <elgersmad-at-email.msn-dot-com>
>> "JAMES" wrote:
>>" I thought the AC resistance equation for coils was 2 pi freq(in Hertz)
>H(in
>> Henrys)."
>>
>> James:
>
>You have the equation for inductive reactance, Not the resistance!
>They are very different. I don't know how to explain it without going
>into a long disertation that may only confuse you.
>Resistance and reactance combined is called impedance.
>Impedance is the pathagrean sum of the two.
>
>Z=sqrt(R^2+X^2)
>
>Z= impedance
>R=resistance
>X=reactance
>
>
>Unloaded Q, Qu=X/Rac  -This determines the Quality factor of the coil.
>Energy is lost via heat due to the Rac ( real, resistive part).
>
>
>An impedance also will cause a phase shift between E and I
>
>But then there's conjugates and resonance ....etc.
>
>Like I said, it can get involved.  I suggest you curl up with a
>basic electronics book to fill in the blanks. Then we can help
>take the rough edges off the experience
>
>Jim McVey
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