What would you need to produce enough "amp's" to create enough force to make a eletronic motor bike?

Question

there is a company called "ezeebike" in CA, IL. its power with LiTh-batteries and the motor itself is coils and magnets. is it easy to buld something simlar like this using some home made stuffs??

thanks

Answer 1

what you'd need is 200-400 watts.

if you're not already clear on that (ie the difference between amps and watts) i suspect you're in trouble.

in addition, you might note that it's an interesting site.

there are several models, and they use rather sophisticated components.

have a go if you like.

it's my guess you'll run into more trouble than you can handle.

Answer 2

Building a motor to power a small electric bike is going to be very difficult. If you had a well equipped shop, that is, an accurate Drill Press, Milling machine, and a good Lathe, along with at least a MIG welder, and a hydraulic press, then you could probably "roll your own" (make a motor). It is by far cheaper to buy one. To make your own, just the alignment of the rotor shaft, and the frame that has to support it has to be as close to exactly right as you can get it. We are talking about accuracies in the range of 0.001 inches, on horizontal and vertical axis to keep the shaft from binding, as well has having the clearance, with the needed closeness of rotor coils to armature as is practical. To see what I am talking about, take a DC motor apart some time, you'll see what I mean.

The volts that you need, at least 12 volts. Up to 24 volts would be even better. The current draw, in amps, is going to depend on a lot of things. The first is, how much does the bike weigh, and how much weight is it going to be called upon to move. The higher the reserve capacity of the battery, the better. You would need batteries designed for electric chairs, such as those built for those who can not walk any more, or batteries designed for trolling motor, or RV use. Car batteries, would not be a good choice. That 700 or higher cranking amps is not the reserve capacity of the battery. Cranking amps are only good for a few seconds, to maybe a minute or two. After that, you have a dead battery.