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Re: primary side charging inductors

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.

----- 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. > > >