Quote Originally Posted by gizz
That was very handy woody, thanks.
Tried a bosch 750gpa with an 8 inch wheel with an 8:1 reduction. It says 49,7 amps to spin a wheel and 99.3amps peak.
So a speed controller for 60A continous with a peak capacity with say 120 would be almnost perfect then?
I suppose the amps to keep the wheel spinning once started will lower but just to be sure.

Couldn't really find motors in the list named wheelchair ones, does anyone know roughly what currents they draw?

Ummmm...you sure?

Did you alter ALL the parameters correctly ... e.g. weight 220lbs

I get the following for 2 motors ( one per side ) , 100kg's @ 24v

Torque (per motor) to spin wheels 792 oz-in
Amps (per motor) to spin wheels 91.034 Amps
Theoretical Top Speed 11.923 MPH @ 24v & 17.885 MPH @ 36v
Total Peak Amps 182.06 Amps
Amp Hours Required - 3 Min 6.3724 AH
Amp Hours Required - 5 Min 10.620 AH

You might be able to relate the NPC range to a wheelchair motor/gearbox combo

http://www.npcrobotics.com/products/vie ... 0&mode=gfx