The battery on my old Evolve Carbon, not sure if it would be called Gen1 or Gen2, but it’t the non-GT version with the single large rear motor, is dying. The fundamental problem is that the BMS cuts power to the board as the battery voltage gets too low. It’s very annoying that Evolve designed this thing to not limit current to prevent the BMS cutout.
I pulled out the old ESC/Control system and replaced it with a FOCBOX and Nano-X controller. The increase in power/torque is mind blowing. Of course part of the reason for the torque increase is that no doubt I am running a much higher motor current than the original controller does. Does anyone know the approximate settings for the stock ESC? My new settings are 40A motor and 20A battery, the back wheel (pneumatic) can spin at low speed and the acceleration to top speed is probably twice as fast.
I am considering further increasing the motor/battery current because I don’t really mind if I break this motor. At the moment it is barely getting warm and previously it got hot. Maybe this is a function of FOC and better control algorithms wasting less power even though the board output is much higher.
Seriously considering building a dual motor setup for this thing now, new lease on life!
The other huge advantages
- The BMS now never shuts down to protect the battery because the FOCBOX current limits and prevents the battery voltage getting low enough for that to happen.
- Much better braking (to a complete stop)
- FOC seems much quieter (faster, more efficient?)
- Controller has longer throw, better feel.
- Bluetooth monitoring of all ESC parameters like temperature, power etc.