IN this picture the trace that comes from the boost transistors on the top right side and wraps around the last igbt on the right side then runs from right to left.
Ah, I see. In theory its awful, it builds up all kind o parasitics. On the other hand, this is a tesla model S inverter, its 300+kw. Look closely at the red board, you can clearly see individual gate resistors, 2 on each gate, and the long copper traces. Those are the gate traces for all those igbts.Arlo1 wrote:IN this picture the trace that comes from the boost transistors on the top right side and wraps around the last igbt on the right side then runs from right to left.
It would be for an aircraft. So cooling air should not be a problem. I would prefer to avoid liquid cooling to get rid of the pump as a failure point.marcos wrote:plenty of cooling should be considered.
That red pcb does't carry much current, it only drives the gates. Its connected to the sources and gates, no connection to the drains.HighHopes wrote:about your link to tesla invverter. i have seen other tear downs to the inverter board and i'm impressed they can get that much current through there PCB. it doesn't even look like very thick copper... 2oz? impossible... yet that's what it looks like
Heard you and the module approach became stage I. Now stage II is getting the actual thing doneHighHopes wrote:or just drop in a large module. lower overall inverter volume, more robust for same power level. more expensive though but its not a whole lot more
In that case I'll keep the footprint but change the part# for one that I can use with confidence at 100°CHighHopes wrote:good point. you probably don't need that diode at all if have low voltage transients anyway. i built many high power gate drivers without it.
That may of been me ? I posted about not seeing desat in your Sch on page 1, but then I clicked on the link and saw your did have desat so deleted the postSomeone posted something about being silly about not seeing the desat circuit, and his signature linked to a good thread about a diy gate driver that I didn't read before. Spent quite some time today reading the complete thread on the phone and something caught my attention.