Dear Jim,
Info on charging reactors are scant. I have a few ebooks I found on Google
covering pulse transformers and charging reactors. I can dig them out if
you want.
If you get hold of a small reactor that is used in inverter air
conditioners it will give you some clue how to make one.
I've got one running in my VTTC it works with a 4700pf tank cap to shuffle
energy and store it for my tank circuit. It is made from a single MOT core
(2 Es) with two burnt out MOT secondaries I repaired. It has a 2mm gap. It
humms away and increased the spark length on my safety gap to 6mm. It is
probably exceeding the voltage rating of my GU 81m but its not continuous.
I did some oscilloscope readings and it does indeed work - if poorly...
Teslalabour has a very large dc resonance charging reactor setup I have
seen on YouTube.
As for the picture I have the same transformer aswell I think it is for
lighting. Mine was 32v 1300va. Nice thick copper and solid cores.
Good luck!
-Will
On 18/08/2014 10:32 AM, "Jim Mora" <wavetuner@xxxxxxxxx> wrote:
> Hello Group,
>
> I posted few more pictures on my blog spot. The tap that goes down to the
> standoff goes under the other two legs and joins the star point at the
> back.
> It is held off of ground to reduce HV stress ( of coarse the primary Wye is
> grounded for safety from the factory) and phase fault interruption.
>
> There is also a couple of pictures of the recent door stop transformer I
> acquired. The tag does indeed say 10KVA. It was a fortuitous find. I have
> found some bobbins that will fit it as well. I have a choice of sectional
> (good for HV I would think) or two bobbins to fill the window. Otherwise,
> the sectional would be 4 winding windows per leg. Either way, I can do both
> legs with these for series or parallel. Two cores may be better. Saturation
> may be an issue since it is pulsed DC. I'm not really clear on that except
> clearly there is always a voltage change going on and resonance with the
> tank cap between breaks.
>
> There is a fair amount of threads in the Pupman achieves, but I did not
> land
> on one that actually is a walk through on construction of a charge inductor
> in this power range, other than MOT's. I have a fair amount of magnet wire
> remnants on spools so I will proceed with a sectioned bobbin and measure
> one
> section inductance and resistance starting with #22 AWG. I would like to
> end
> up with two 4 or 5 Henry chokes that can hold off 22KV min resonant rise.
> Again these will gapped and be under oil and well isolated at the core. I
> may be able to produce 10KVA with the supply. If there is sag, I will
> resort
> to the dreadful Cprimary cap of 10x or 20x my tank cap as stated by Bert
> Hickman. The whole idea of the 6 pulse is to avoid this deadly cap which
> dictates a stiff transformer supply. After the Raytheon is back together,
> I'm in for some bench experimentation over some time!
>
> Check out the couple of new pics.
>
> Jim Mora
>
> http://teslawavetuner.blogspot.com/
>
>
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