So, I've been thinking about building a EV Bike (no money for a car right now), which I thought would be really complicated and/or impossible for me to do. Upon finding this forum I realized I could do it. So, and after a lot of research I got to this:
A Yamaha Zuma (In Europe it's called Bw's) that can reach 50mph and do about 80-100 miles.
After my calculations based on your Beginners Guide, this could be achieved with a 72v motor, and preferably Li-po's, or at least I hope so, that's where you experts come in
So I guess a 5kw with 72v would do the trick, although many of you may think it's overkill, well, I don't need to max out the motor all the time, so, in a 6000rpm max motor, if I geared the bike in a way that it would reach 50mph in the 3000-4000 rpm range, i guess the motor won't be stressed all the time, I would end up getting better milleage, and won't hurt the batteries too much. (This is what's going on in my head, I need your help before I start buying anything)
These are the motors I found that fit my needs:
I was thinking the alltrax (http://www.thunderstruck-ev.com/index.php?dispatch=products.view&product_id=7
) would be a nice controller, although the price could be sweeter, so, and by looking at the kelly controllers, if I used http://kellycontroller.com/kbl7210124-72v100abldc-controllerwith-regen-p-56.html
, would the 50A give me enough power to have normal-good acceleration and 50mph speed? If not, how much would I need?
Or should I just stick with the Goldenmotor HPC300A?
Bare in mind that I weight about 80kg and the bike(With the ICE) 75kg.
Next are the Batteries.
After the calculations 150Ah is what's needed to make the 80 mile range possible. Here's were my biggest question is, in the guide there isn't a clear explanation, do I need 150Ah to cover the distance, or should I have much more than that?
I am going for LifePO4, and, the only ones I can match up to the bike (Under the seat, helmet space and fuel tank, are 22x these: http://stores.headway-headquarters.com/-strse-1/Headway%2C-batteries%2C-EV%2C-solar/Detail.bok
Okay, so, what do you think?