Re: [TCML] Re: Tesla Digest, Vol 59, Issue 13

[ADAM MUNICH <ajm9414@xxxxxxx>]

Nope, that would put an extra 7.5kV of stress on the 'end'
secondaries, something which would lead to two burnt transformers.

You can put them in // though.


On Mon, Sep 17, 2012 at 12:56 AM, Nathan Woodhull <nwoodhull1@xxxxxxxxx> wrote:
> Hi Tesla fans,I have two 15KV 60ma NST's.Can these be wired in series to get 30KV or wired in paralell to get 120ma?Newcomer Nathan
>
>
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> Subject: Tesla Digest, Vol 59, Issue 13
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> Today's Topics:
>
>    1. 3phase convert (jdonges@xxxxxxxxx)
>    2. Re: 3 phase to 1 phase conversion (Mark X2)
>    3. Current transformer with PLL-Overcoming the phase-shift
>       problem (vatercox@xxxxxxx)
>
> a curcuit breaker will trip faster than a hrc fuse, if your really worried a b curve breaker will trip even faster
> Hi all,
>
> we use a . were you use a ,    (but you busted me anyway Brain, since I'm
> not consistent if I read back the sentence after that)
> I was writing in a reply, that your MG idea is indeed straight forward and
> sound. But you already mentioned the IF's and BUT's.
> IF I had a generator in my shed , I would've tried, BUT I haven't.  Maybe
> search for a High Voltage generator might be even better, if it would
> eliminate the need for the HV transformer.
>
> Scotty, and you named it!
>
> Ooh no! I can still taste the smell of burnt silicon, thanks ;)  A 6 or 12
> pulse dc coil might be a nice project for a far away future though.
>
> So, If I understand correctly, when connecting a transformer between 2
> phases, the RMS voltage simply goes up then (with a factor √2, not? since 3
> phase has the factor √3).  What about the current, since each phase is 16A
> fused? (never mind, ofcourse, 2 fuses in series, stays 16A fused) Power
> output would be 325V x 16A then.
> I would say no grounding, use 2 pole transformer for a floating HV and
> primary circuit.
>
> It does ring a faint bell, what you mention about tapping in between and I
> like this idea the most so far (sorry Brain), since I do have a 5kW 3ph
> motor somewhere. Perhaps you would like to elaborate some Dave?
>
> Thanks for your suggestions,
>
> Mark
>
>
> Dear List,
>
> Re: that fact that the current flowing in the secondary is 90 degrees out of phase with the voltage -which apparently can cause problems with a PLL controller when a current transformer is used to obtain the necessary positive feedback (although I'm not to sure whether or not this applies to a "quadrature" PLL) could this problem not be solved by using a four-phase output divider eg. a couple of 4013 cmos bistable ic wired as a ring or "Johnson" counter to derive rock-solid 90 degree phase shift irrespective of frequency?
>
> Then, with the VCO operating at twice the resonant frequency,the primary could be fed from "0 degree" output of ring counter with the PLL reference input being provided by the "90 degree" output. This would provide a matching signal to the phase-shifted feedback from the current transformer.
>
> What do you think?
>
>
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