I have been making some progress. Can be seen on this thread. https://endless-sphere.com/forums/viewtopic.php?f=30&t=63982
Here is a couple videos at ~410v charge.
[youtube]mu8zUJZZdx8[/youtube]
[youtube]V9ow9vxk7FU[/youtube]
What I found is when the battery gets down to ~1/2 charge which is a voltage of around 410v it lets me lay rubber. But with a fill charge I can not run anything over about 375 phase amps. When the battery was at 410v the other day I turned the peak phase amps up to 550 and it was no problem once the car was moving and in sensorless to go full throttle and lay rubber. I usually have it set at 450 as 400 is where it starts to spin both tires. And I feel If I can get success at 450 it will let me know I am making progress.
So I did try a lot of differernt control loop settings. I tried 5 kHz 6kzh 8khz 10 kHz 12khz and 14khz pwm It seems 10khz might be a smidgen better then 6 kHz but the heat sink gets hot fast and its hard to say if it really helped as I have 1 temp sensor per IGBT and when they get to 79 deg C I have current reduction of 20 peak phase amps per deg C. I did get one igbt to 84 deg with 10khz pwm. I do not have the cooling system hooked up yet. I will soon.
Lebowski has an option to capture a screen shot of all the data by pushing the setup button so I will try to implement that and continue. I have the desat holding the reset button until a key cycle and when I try to run to much power it trips the desat. I am not sure if its a noise thing or the controller konking out then tripping the desat. Hmm as I type this I realize I should setup the double pulse tester again. I added a Schottky and a Zener to the desat pin to help protect it from false triggers but if the current and voltage are high enough it might not be finished switching when the desat is fully charged. So I will double check this.
I might have to add the couple parts suggested
here to create a slightly longer delay in the desat to allow my big igbts switch completely.
There is a lot of things that can be causing this. But I am very lucky I have only killed 1 igbt sorting things out. I thought the desat was set to low so I got really aggressive with settings and with a really low voltage Zener in the desat circuit and 300pf of cap to slow the circuit. I have put about 30kwh through this car doing runs in front of the shop lol and laid rubber about 70 times so far!