hi all,
i need to control a simple DC motor (using Arduino and some H-bridge).
what is the best/simplest way to implement a braking control? i don't mean to slow it down (by shortening its terminal) - i mean really braking it (against downhill slipping).
will fast forward/backward alternation do the trick? or is there any more decent way of doing this?
thanks in advance !
rubin
It should work with
It should work with forward/backward alternation trick. The following schematic works as a 4-quadrant chopper DC driver. Which means active breaking and acceleration in both directions.
The fun thing is, you will only need 1 PWM pin per motor. At 50% PWM and will stop and fully break. From 49..0% PWM it will run in one direction, from 51..100% in the other direction. The breaking effect will be getting smaller, the faster the robots go. On slow speed it should be drive down a ramp without getting faster (but did not tested it). The disadvantage of this simple solution: In stop mode the motor will draw a lot of current.
