Is there a motor controller out there that can control a big motor. Like the ones that are used in electric scooter, skateboard…etc??
Im not sure, but I think this may be able to handle it (10 amps per motor I beleive):
lynxmotion.com/Product.aspx? … egoryID=10
If not, try robotmarketplace.com
they have everything that uses big industral kind of stuff (specifically for battlebot robots that will be close to what you want)
thanks
There are loads of controllers to handle 60 to 300 amps per channel. Here are a few of the most popular ones:
robotmarketplace.com/marketp … llers.html
Well the prices may look a bit high, but I must say that their products go out of the “hobby” feild and more into industrial applications which makes them great for doing more advanced work such as what you are doing. These badboys are specifically designed for that application where as most hobby parts are for general hobby use. Robotmarketplace.com is probably the best way to go IMO 8)
These put out 120watts per a channel at 12v ,these put 250watts at 12v but only have 1 channel lynxmotion.com/Product.aspx?productID=493&CategoryID=10
If this scooter of yours is going to be lugging a fat as_ like myself around you’d better look outside the current lynxmotion product offerings. I have a pair of those HB-25’s and they are great for 25 amps continuous with 35 surge I believe. I strongly suggest you look at multi hundred amp capability if you plan on a large load, i.e. your body. I have a pair of OSMC’s from the Robotmarketplace that have easily handed three 12V drill motors in parallel each on a 30lb platform but even these may not be enough for your needs. What type/size motor are you using? This will dictate the minimum motor controller needs.
My power wheelchair has a 60 Amp controller, but I am not sure if this is per motor or total. It can carry around a 300 pound load plus the weight of the chair itself (184 pounds with stock batteries). Maximum range is specified as 15 to 20 miles on a full charge. I only use my wheelchair when I absolutely need it now (when my legs hurt or I am having balance problems), not all the time. I can go a maximum of 10 MPH in this chair. 
8-Dale
Depending on where you are in the world, I have found these guys very good for supply and support. The website is quite useful aswell.