Treadmill motors works :)

[dcastillo]

just wanted to say thanx again to all the great advice Ive gotten recently on here....
Also I just got my controller and pedal wired up and went for my first ride.
motor is a 90V 21A treadmill motor
Im powering it from 48V (4x12V 10Ahr batteries)

currently a 10T -70T setup on a fixed axle with 14" tires.

drives just fine, perfect for teaching my kids, does about 10-12mph on the street, draws around 30-40Amps on takeoff, at full speed cruising it uses about 7-8A.

the power isnt extreme by any means, but I was able to drive in the grass just fine and even slighly uphill with no problems and Im about 190lbs.

I probably use this setup for awhile and then switch to dual 1000W motors down the road...

now I just need to get better brakes on this thing


question:
should I be concerned about the 30+ amps if its just for a few seconds? (I havent actually floored it from standstill, afraid of burning something, should I be?)

 

[itsid]

You're very welcome

Not really no, as long as the current drops really within a few seconds you should be safe.
But if you want you can check the motor by touching it.
Make two or three take offs in a row without actually driving around and then just touch your motor.
If it's cool or maybe warm'ish you'll be okay.
If it's hot reduce the max current with your controller (you got a programmable kelly AFAIR, right?)
I think you should have a sticker on the motor that says what peak current it can handle and for what time

If not set your kelly to around 28-30 Amps I think the motor should be okay with that current for at least ten seconds without overheating.

'sid

[EDIT]
I would avoid constant hill climbing though, or at least check the motor regularly with your hand;
If it's too hot to touch, let it cool down.

 

[landuse]

just wanted to say thanx again to all the great advice Ive gotten recently on here....

Even though I didn't really help you with your kart, I will say "you're welcome" for the rest of the forum

Happy riding