Battery Vehicle Society

Whether you use batteries, capacitors or plug your ev into the mains with a very long extension lead (electric train perhaps) you are going to need a controller. It is what switches your motor on and off and allows it to accelerate or slow down. In its simplest form a controller may just be an on/off switch, and this works quite well for small machines like electric drills, but on an electric vehicle something a bit more sophisticated is required.
A Pulse Width Modulator controller is basically a system of switching the current on and off thousands of times per second so that the motor thinks the current is being varried.
I agree with Nikki, get the right size controller for the voltage you intend to put across the motor.

I understand - I just wanted to spare the controller the strain of having extra volts chucked at it, by using essentially on-off switch and an extra 6v straight into the motor when I need it.

Anyway, thanks for all the info folks, thanks to you and some ideas from another forum I think I'm about ready to start collecting bits for, and designing my mod!! Woot!

I'll let you know how it works out as and when

Cheers
Andy

Keeps up to speed with your plans and take a few pic's of how you get on

ChrisB