Ubec / Evx

[GriffinRU]

!!!WARRANTY VOID!!!

Original link...

Novak EVX ESC works with up to 14 cells without problems. With some modifications it is possible to extend this up to 18-20 cells.
Here are the steps:
- remove ESC enclosure

- dismount small daughter board

- replace selected 10k resistor with 8.2k

(originally I replaced it with 7.5k, later testing forced to replace it with 8.2k. On selected ESC's loss of proportional speed under low power (0-35% throttle) and loss of reverse mode in 3d profile was observed. But with 8.2k resistor everything works fine.)

- put together in reverse order

Artur

P.S. Replacing stock FET's with IRF1404 or IRF3703 helps reduce heat dissipation and allows to increase current ratings 2-3 times.

And do not try to run 7-turn motors at 18 cells :)

More tweaking can be done with trimpot instead of fixed resistors, but less reliable in the field.


Voltage at FET's drivers before modification

After (with 8.2k should be around 30V)


!!!WARRANTY VOID!!!