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[Amps] Toroidal Tank Coils

To: <amps@contesting.com>
Subject: [Amps] Toroidal Tank Coils
From: 2 at vc.net (2)
Date: Mon Mar 3 14:24:22 2003

>> Mr. Rauch -- 80% of 4000V = 3200V.  90% of 4000V = 3600V.  What's the
>> problem with 3500V?.
>
>Your normal diversion is to lift things out of context. The rest of my
>answer explains the difference.
>
>> >which would translate to 3kV or more across the tank inductance.
>> >The exact value depends on tank loaded Q, which sets phase shift across
>the
>> >inductance. Q's of 10-12 result in about 130-degree shift,
>>
>> And I thought the phase shift in an inductor was 90?.
>
>You thought wrong.
>
**  But it's not my fault, Tom.  The professor who taught AC circuit 
analysis at Cal-Poly said that E leads I by 90? in and inductor and I 
lags E by 90? in a capacitor.  Thank you very much for correcting his 
error. 

>Phase shift depends on reactance and circuit impedances. A series inductor
>only causes a 90-degree shift when the load impedance is zero and the
>inductor is infinite in value.
>
>In a pi-network tank system we have shunt capacitive reactances at each end,
>and a series inductance. The ratio of those reactances and the termination
>impedance of the network determines the phase shift. It is 90-degrees in a
>minimum Q network that matches two impedances, because the network behaves
>like a 1/4 wl transmission line with a surge impedance equal to the
>geometric mean of the load and source impedances. The same formula that
>would apply to a 1/4 wl transmission line applies to the CLC or LCL system
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