Re: OL-DRSSTC - 13

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Steve,

At 12:16 PM 10/16/2005, you wrote:

> Is there any way to run 340VDC?  Might be better to use more V and 
> less I for the IGBTs.  You could most likely make better use of the 
> IGBTs that way.  Im wondering if a half-wave voltage doubler could 
> work (as seen in microwave ovens, or our VTTCs)?

Sure, the buss voltage is fairly arbitrary.  I just used the easy 
120VAC line.  I suppose with a resonant 240VAC circuit you could get 
to 500VDC on the buss fairly easily.  Of course, various part values 
would have to be changed for higher voltage but it should be pretty easy.

The next great improvement is to figure out how to run at 120BPS 
instead of 60 BPS.  Right now, I use the dead AC half cycle to fire 
since there is no extra input power coming in and I know the thing 
will turn off.  If extra AC power were coming in, it will just keep 
firing continuously.

> Steve Ward
Cheers,

        Terry