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Very odd. Might be good to get some actual charging current waveforms,
to make sure the reactor is large enough to minimize shoot-through
current during the SG dwell time. Otherwise the wound-up reactor will
try to keep the gap lit.
You should be able to get away with far less average power. Here is a
similiar 5.2m coil, using a 3ph DC resonant charging supply. Typical
max operating power is about 25kW:
Message: 17
Date: Sun, 11 Jan 2015 15:22:18 +0100
From:vam@xxxxxxxxx
To: "Tesla Coil Mailing List"<tesla@xxxxxxxxxx>
Subject: Re: [TCML] Need some advice on 150kva sgtc
Message-ID:
<b0be8d487620c2d13323517118360673.squirrel@xxxxxxxxxxxxxxxxx>
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Good question. But i didn't "accurately" measure the charging current
prior to fire wheel mode. What i can tell there was no sign of any change
in sparkgap behaviour. No difference in light output/color or sound. It
happened very sudden.
> When lowering the break rate, the primary current of the supply
> transformer
> decreases. The importand question now is: Did you measure an increasing
> primary current of the supply transformer, just before the ignition of the
> firewheel?
> Or does this happen suddenly without any warning, when the critical bps is
> reached?
