I’m using a raiden7 VESC on my tow boogie. It’s a nice unit, seems well made, light weight, has screw terminals which useful.
One issue is that it overheats really quickly - from cold 15 seconds at 100amp and it will thermal throttle at 85°C. This is when the VESC is attached to a large aluminium enclosure with thermal paste between the VESC and the enclosure, and it’s winter and only 13°C outside.
The temp drops fast when current is reduced, back down to 30-40°C in under a minute.
Between the PCB and the VESC aluminium base is 1mm thick thermal pad which I’m assuming is the heat transfer bottle neck.
What other options are are there for this pad? I’m thinking a thinner pad as an electrical insulator, and some copper sheet. Or just pump the whole underside with thermal paste, or a graphite pad.
Will any of these option offer substantial improvements?
The PCB should really aluminium for the best heat transfer like many other VESCs.
Photo credit @cim96dm7