Re: Recent s.s.t.c work

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Steve Ward <steve.ward@xxxxxxxxx>



On 10/19/05, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: "K. C. Herrick" <<mailto:kchdlh@xxxxxxx>kchdlh@xxxxxxx>

Nope, no shoot-thru in this instance because no H.V. is applied. I
didn't apply H.V. because I'd need 4 probes to implement 2
differential connections and I only have 3.

KCH


Hi Ken,

I meant shoot through in the gate driver half-bridge that drives the 
gate of each main IGBT.  No HV would have to present to have 
shoot-through there, just the 60VDC present on the drivers.

Anyway, the shift register is an interesting idea, and i will be 
curious to see how it effects stability.  I would suspect that it 
might be just fine working in that manner because 1) you should be 
running for just a few cycles, and 2) the frequency of the primary 
*shouldnt* shift a whole lot during those few cycles.  So chances are 
the feedback will be slightly off, but im guessing that its gonna be 
much closer to the zero cross than what you have now ;-).  The nice 
thing about that shift register is that its independent of your 
operating frequency (assuming i understand how the shifter 
works).  Hope that all works out well, good luck!  Make sure to allow 
for more than enough shift.

Steve