Imagine you have a R/C car but in a big scale, where its weight is around 300 lbs. or so. What kind of braking system can be installed? As far as I know, for small R/C car, to brake the car, we can decrease the voltage input. However, for a big car, when it is moving fast, there is a lot of momentum even when the input voltage is shut off. How would it brake?
If the drive motor is a permanent magnet DC motor, you may use regenerative braking, that is shorting the motor terminals after the supply has been removed. Lenz's Law then brings the vehicle to a stop.
