Re: primary side charging inductors

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Hydrogen18" <hydrogen18@xxxxxxxxxxxxx>

I considered this, but always figured the HVDC filter cap would be damaged
when the spark gap fires due to the immense currents.

Eric
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, January 11, 2005 8:19 PM
Subject: primary side charging inductors


> Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>
>
> The recent discussion about CAUAC's primary side inductors brings up an
> interesting point.  If you have 3 phase power, this works very
> nicely.    The idea of putting the choke on the primary is very attractive
> because
> a) it's at a reasonable voltage
> b) you have the transformer working for you, so you don't need as much
> inductance
>
> Rather than trying to make huge inductors (albeit at low currents) that
can
> hold off tens of kV, you can make (or buy) a high current, low voltage
> inductor.
>
> But, what if you have single phase power, still want to do DC resonant
> charging.  (not rectified AC, but real DC).
>
> Obviously, this doesn't work if you have a big honking (term of art)
filter
> capacitor.
>
> It might be that overall, the total system might be smaller and lighter
> weight if you used a rotary converter (or, maybe, some combination of L
and
> C on the primary side, like big arc welders do) to synthesize 3 phases.
>
> Ultimately, I suppose that the energy stored in the inductor is the same,
> so it will be about the same size, regardless of position.
>
> In fact, perhaps the rotary converter could serve as the inductor (if it
> were a wound rotor var compensator/synchronous condenser, it almost
> certainly could).
>
> We're talking here about systems that are >10kVA (for smaller, it's
> probably not worth it), but that are still running off single phase.
>
>
>