Instructables

Regen Braking Motor Controller

Good morning....

Quick question regarding motor controllers with the facility of regen braking.....

For a project of mine I am creating an EV (with a dune buggy chassis), which needs a system to recharge the batteries when been driven or 'towed' by an external force. I've been looking at a 4QD motor controller, which has the regen braking system already built in.

My idea is to use the back EMF to charge the batteries. This in theory is quite similar to regen braking, having done a bit of research, and also with some info from the 4QD site itself.

I know that if the back EMF is to great, I risk damaging the motor controller. But if there was a way to regulate the back EMF (either by controlling the speed it is been externally driven or with use of electronic circuitry), could I essentially recharge the batteries using this motor controller???!

Thanks in advance,
Dave

The back EMF is just the voltage of the motor running as a generator. It can't exceed the same voltage that you'd drive the motor with to get the same RPM>