First off, I am not the normal. I have a good 5 mile each way route to my university that I take everyday. It involves no hills higher of a grade than 7%. However, on my way to class, I have 16 uphill blocks followed by 2 downhill blocks, followed by another 4 blocks uphill before it turns to mostly downhill and flat. I can get about 5 blocks before my vesc’s start to shutdown from too much heat.
My first solution was a 20mm fan that blew air through the side where the vesc’s are. This did not do much.
After trying the small fan, I decided to step it up to 2x 40 mm fans one that blows air directly down onto the FETs of each VESC, which from my research, seem to be the main component that over heats.
This works much better. However, I still can not make it the 16 uphill blocks without the board ramping my speed back to a standstill, and forcing me to take a break to let it cool down.
So what else can I do?
I bough little heatsinks that I could put into the FETs, but I’m afraid that the intense vibrations of San Franciscos poor quality roads along with the heat with kill the glue on the back of the heatsinks and knock them off, causing a short circuit somewheres.