Hi @mamdouh,
I’m curious what kind of tether you’re using for this. Low voltage DC is quite poorly suited to providing power at a distance, so I’m interested in how much voltage drop you’re experiencing.
Out of interest, is this occurring in the water? Previously we’ve found that
I don’t expect flyback diodes would work well for a brushless DC motor without being integrated into the controller, although it’s been a while since I last worked with diode designs, and I’m not super familiar with how the ESC’s regenerative braking operates, so I may be mistaken.
Some other diode options I can think of would be using one or more Zener or TVS diodes to avoid the over-voltage, but it may be difficult to get a suitable power rating. Alternatively it may be possible to use an “ideal diode” in series with the power wire to each ESC, but adding a barrier against reverse current doesn’t provide anywhere for the power to dissipate, so could potentially cause some extra ESC heating or something (I’m not certain what would occur).
Some previous recommendations: