We have been using the VESC 75/300 for quite sometime now, but we are having trouble achieving the 300 A continues rating it says it can handle. Attached you may find a graph of real life usage of the VESC on our boat. One can see that after using the VESC puling a motor current of just above 100 A (mean) the maximum MOSFET temperature variable rises almost to 100 ºC (we have limited the temperature to 95 ºC).
My question is, what do we need to do to achieve the claimed 300 A rating? Do we have do a water cooling of the VESC? What have you guys did when you tested the VESC with 300 A?
The VESC is located insid a fiber class box, but this box has a forced air cooling so that the heat can move away from the box.