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diode
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From: Sulaiman Abdullah [SMTP:sulabd-at-hotmail-dot-com]
Sent: Friday, April 10, 1998 12:35 PM
To: tesla-at-pupman-dot-com
Subject: Re: diode
>From: David Dean [SMTP:deano-at-corridor-dot-net]
>Sent: Thursday, April 09, 1998 3:45 PM
>To: Tesla List
>Subject: Re: diode
>
<big snip>
>The point about resonant charging- as I understand it you get resonant
>charging
>when Xc = Xl ; that is when the output impedance of the transformer is
equal
>to the
>impedance of the capacitor in this case at 60hz. Since Xr is "assumed"
to be
>neglegable, and Xc and Xl are 180 degrees out of phase, the resultant
Vo
>would be
>2*Vin. Of course in real life there is always some resistance so it
never
>gets that high
>but...sometimes close. I would expect to have to use some type of
current
>limiting in
>series with the pri. as they do with distribution transformers,
potential
>transformers, etc.
>Perhaps I'm missing something?
>
I disagree, resonant charging appears as though there is a resonant
circuit as a load for the transformer consisting of;
capacitance (Primary Capacitor + any filter capacitance)
resistance (Copper resistance of transformer + any series resistance)
inductance (LEAKAGE inductance of the transformer secondary)
The actual value of the transformer inductance is not so important,
it is the effective leakage inductance.
For a power transformer (no shunts) the leakage inductance is for
our purposes negligible.
For NST OBIT etc. the current-limiting is achieved by 'shunting'
the magnetic flux (whatever that is?) causing the effective
leakage inductance to be the full secondary inductance.
That's my opinion anyway! bye ... Sulaiman
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