im a passionate ebike builder and i have been always looking for a robust ESC with high current capability. I came across the VESC 4.12 and was very impressed by the opportunities it offers. Sadly i managed to blow 4 DRV's and got tired to repair them. I came across this VESC based ESC from the Netherlands :
It has no DRV so you cannot fry it. It is programed with the VESC TOOL which makes it as user friendly as the VESC i used . It has no cooling when you buy it but thats what the description tells you. You have to do sth on your own. I tried to cool the fets with minimal space and weight requirements. I wanted an optimal heat flow from the fet tab to a small cooler which is therefore directly soldered to the backside of the power board. Then a forced air cooling is applied to remove the heat.
I removed the coating to on the backside of the power board with a dremel:
then i made small angled copper tabs :
Those are then directly soldered to the backside of the power board with a powerful soldering iron ( Weller W201C) . Care must been taken to avoid shorts between the tracks!
the other side of the Power board:
The backside of the power board is cooled with an airflow ( The BESC has a 12 V output which can be used for this, i used the power supply in this case )
The result is a steady state temperature of 42°C at 100A phase current. As a load i used a scorpion HK 7050 Motor in foc open loop - as demonstrated by benjamin vedder . To me it is a very astounding result to get a 6 fet controller that gentle to 100A current continuous!. -Therefore i want to share my results with this cooling mod.