I agree John. Teco has built in overheat protection measured at the IGBT heat sink. If the temp gets too high the programed response is to lower the carrier frequency to 4 K HZ.
Thanks for sharing your adventure with this project it has helped me more than you will know!!
I had the exact problem with my start capacitor on the exact same weekend as you and have been doing the same 3 phase conversion (with help from our local motor repair shop) and have been using it for a few days now and last night i was parting off just as you said in you previous post and the variable speed is awesome!!! I will never have a lathe without it again!!
I was keeping an eye on this thread and thinking how similar your situation is to mine and kind of chuckling to myself but when you posted about the parting off....chills went up my spine!!
I have even made a similar quick change tool holder rack to yours...
thanks for letting us in your shop!!
Wow, weird coincidences! Are you going to post about your upgrade?