Re: Skip's DRSSTC

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jimmy Hynes <jphynes@xxxxxxxxx>

Hey,
I'm using the same IGBTs you are (~200khz), and have gotten 37" so 
far, with around 400A peak. The IGBTs can do at least 600A at this 
frequency (33vgs?). This is all with a half bridge. With a full 
bridge, I'm sure 58" is possible.

0.24 is good for the K, you don't need to push it past there really.


On 9/29/05, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: Skip Greiner <<mailto:sgreiner@xxxxxxxxx>sgreiner@xxxxxxxxx>

Hi Steve
Don't forget I am using IRG4PC40W IGBTs,  not HGT1N40N60A IGBTs. Do
you really think 58" is possible? If so how much dc will I need on
the collectors to get to 58" ? I believe that I am running k at about
.24 right now. I am afraid to go much higher.Also the decoupling caps
are not across the IGBTs.
Skip

Tesla list wrote:

>Original poster: Steve Ward 
<<mailto:steve.ward@xxxxxxxxx>steve.ward@xxxxxxxxx >
>
>Hi Skip
>
>I do have the TVSs and decoupling caps on each IGBT. I guess that is
>why they are still alive.
>
>
>
>You dont really have capacitors across *each* IGBT do you?  That
>would be terribly lossy as the caps would discharge through the
>IGBTs each time they turned on.
>
>Maybe you dont understand, but you really *must* use the reverse
>diodes on the IGBTs!
>
>"Don't forget, the secondary winding is only 18" tall."
>
>So that coil should be good to 58" sparks or so.
>
>Steve
>
>
>
>