Re: Chaotic Resonance(Solid State Coilers)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Peter Lawrence by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Peter.Lawrence-at-Eng.Sun-dot-com>

I find this interesting because my back-of-the-envelope calculation using
the traditional resonance-capacitor formula yeilded a different value.

	1 / (2 * PI * 8,300/0.020 * 50) = 7.6nF

I wonder whats wrong here. Did you try a capacitor value near 7.6?

-Pete Lawrence.


Charles Hobson wrote:

> I recently did a series of measurements and calculations on a Boiler
> Ignition Transformer  (8.3kV/20mA)  to determine, amongst other things,
> what value capacitor will resonate with the secondary winding. Because 240V
> mains and 8.3kV are not friendly, I fed 18V to the primary winding instead
> and measured 630V output, a predictable result. I then applied various loads
> to the transformer and measured and recorded primary and secondary voltages
> and currents.
> 
> Under these conditions, the transformer secondary took a fancy to a
>  0.0047uF (4.7nF) capacitor. That's where it resonated at 50Hz. The output
> voltage sky rocketed to 4000V. Now here is where some software may get its
> knickers in a twist: