April 30, 2011
I'm working on an RC car and was thinking about the braking. The idea is: I'm driving at full speed and need to turn. Obviously, because my car is going to break the land speed limits ( ;) ), it cannot take the turn at full speed so I'll need to slow down. Now, just releasing the throttle won't be enough, so I'll have to brake extra somehow. I was thinking about giving slight reverse throttle, so that with PWM, I can handle the braking intensity. Now I don't know what this would mean current-wise. I know this will kind of short-circuit the motor (motor makes its own voltage when rotating, so when you apply a voltage in the different direction, you short-circuit it). I don't know however what currents I'd might me expecting. The motor will run at 8V, draws 1.5A cont without load, 15A when stalled.
Anyone with experience in this department?