about electric motors

[Skipper Dan]

I am not putting it on the bike I am making a pusher config. I am in Peru and things are a little different over here.

 

[Skipper Dan]

I have a few problems and one of which is getting parts the other is shipping. So I have to design things that I can use much of the local supplies. The part I am lacking is only the motor this way and those little DC motors are the easiest and cheapest to ship.

 

[sangesf]

how are you doing this 80 miles with only a 20ah battery?

Um..... That's TWO 20ah batts

 

[Skipper Dan]

still only 40 amps against my 100 amps I suppose I could get smaller batteries and go 48v. It is do-able. Next plan look into batteries

 

[sangesf]

Well you need a 48v motor (running a 24v at 48v will kill the motor quick)
How fast and far do you want to go?
48v will get you 22mph and 12ah will give you 20miles

 

[Skipper Dan]

No I would just get a 48v motor and run 48 volts to it with smaller 12v batteries Same amp hrs around 100. The limiting factor is going to be weight and room I have about 18" x 18" to work with but I only made that so as to handle two 12v deep cycle batteries. anything over 100# or so is not going to be as good also.

 

[Skipper Dan]

The other reason for going with the sprocket type motor is I can gear it for the speed I want with the sprockets I use. If I run a 24v motor geared to only go 10 mph I will not be drawing that much amps.