Hiya, I am currently 15 years old and am taking a GCSE in electronics. I will be building an electric skateboard, and for this will require a PWM circuit to drive my motor. I've built some test circuits using 2 x 555 timer, and another one using a Pic chip, but these have all been used with fairly small voltage motors. The motor I'm looking at is a 36 volt 27amp 800 watt electric motor. I was wondering if anyone could help me make a circuit or link me to any premade circuits. I have seen lots of PWM circuits, but nothing powerful enough to drive this motor.
On a separate note I was wondering how hard it would be to charge the batteries when going downhill. Would this require a very complex circuit, and once again could you link me to any premade schematics.
Thanks
Denis