People keep getting their ESCs fried from DRV chips getting blown or getting in bad crashes from DRV faults, but like what are they? And will I die from getting all of these? My other board gave me errors without issue all the time too
Its a pure gamble. But they’re more prone to happen at big brake/throttle changes. The IC is designed for a specific max voltage. Where sadly a ton of factors come to play weather it gets fried or not. Just such a thing as batch nr on the IC could play a role to sensitivity. Guessing you’re using a 4.x HW version and would recommend steping down to 10s if you’re currently on 12s ( lika alot of people are).
*Edit, nvm saw you wrote 10s, my bad. Maybe time for a esc upgrade?
I mean most of the time the vesc ceases to work when it gets a DRV from my experience, unsure how yours is still chugging along. Imo its a ticking time bomb and inevitably it will die and probably throw you off the board
My theory is the gate drive power supply is a linear regulator, which is very inefficient at 10s and up. It takes a lot of power to drive those big power fets on the vesc 4 at 40khz, so it overheats and either thermal shutdown or smokes out…
Vesc6 seems to have much less issues, as it is happy switching at half the speed. Imo this is a small weakness in the vesc design.
The VESC software is written in such a way as it never really gets to “no switching”. VESC is not popular in airplanes for this reason.
To clarify: you have a (probably) busted 4.12 and a functioning FSESC 6.6 on a different board?
I suspect the best thing to do is slow down the switching speed. I run 20kHz in FOC mode on the same flipsky dual 6.6 you have and it seems to be fine, though I haven’t actually loaded it very hard or looked at it on the thermal camera under load. The reason vesc 4.12 needs to switch faster than the 6 is that it has cheaper sensing circuitry, so it needs to switch faster to get enough data to keep track of the rotor.
I wonder has anyone ever experimented with putting a little IC cooler on top of the DRV chips?
My experience is when you see DRV faults start happening, they will only become more frequent until the ESC dies. I have never seen a DRV fault on an ESC that didn’t die soon afterward. I’m sorry for the bad news. Hopefully yours doesn’t die.