I decided that I have enough time and pictures into this bike to start a build thread.
Introduction: I'm a huge 2 wheel fan of all varieties, electrical mad scientist, sailor, urban assualter, traveler, tech nerd, and general supporter of the electric revolution. Here are a couple of the daily rider gasoline powered bikes (the Vespa is really my girlfriend's
The blue one is a Honda st1300 part of a motorcycle niche known as the sport tourer. I've ridden my ST1300 all over the country and I have about 40k miles on it. I love it because its: fast/reliable/comfortable/practical.For me there really is no compromise. I want to build the e-bike version of a sport tourer.
Motor: First I stumbled upon a 1000w hubmotor from a member on the forum from goldenmotor. This should be sufficient for what I want. I'm hoping for a reliable 30-35mph so this should do the trick. Next build will be high performance with a beefier motor... My first build was a front wheel hubmotor, and this time around I'm going with a rear wheel so that I can keep with some modern suspension without worrying about ripping about dropouts (as much). Should satisfy the "sport" end of things (hey 35 is pretty fast for a bicycle frame
Frame: My first e-bike build was similar to a few others I've seen: a ductape mess...
I wanted something that could conceal the batteries neatly so that I wouldn't need hose clamps and ductape. My forte is electrical and so I want to spend most of my time messing with that and not welding brackets. I found a Norco scrambler frame on craigslist for cheap and it was perfect, chromo with decent components. For cargo I got an xtracycle conversion. This will allow me to hide the batteries and I just love the possibilities for an ebike:D It allows for more touring capability for sure.
Controller: The motor came with a 48v controller from golden. This isn't bad, and theres alot of things I like about it. However, it didn't have the performance capability I was looking for, so I built up a Methods 100A 100V controller. I plan to only run it at about 64 volts ~40A so it should satisfy my requirements for long-haul sport-touring.
Battery: If you want to tour, your going to need a healthy amount of Whs. Luckly for me, it was time to clean out the storage cabinet at work...
Instead of throwing out perfectly good prototypes, I decided to put them to better work on my ebike. The tricky part? Theyre LiCo. Low power density BUT the best energy density you can get (for the most part). How do you make up for low energy density? Quantity. The pack should be somewhere around 3.6kwh when I'm done, but I may have room for another Kwh or so. Well see... I plan to build a bunch of different batteries for this bike over time and I have another couple kwh in Konion cells waiting to be fitted as well
. either way I figure at around 40wh/mile (which is high) I should still be able to get 90miles or more on a single charge, even if I'm flying uphill the whole time
The pack setup right now is 64V 48Ah with cells to spare....
Wheels: I'm using a triple wall Alex Supra-e 26" wheel which should allow for plenty of touring weight. I had a few of these laying from my old P-3 urban assualt bike. I had 2 sets of spokes cut from Ebikes.ca. The first set I gave them the wrong length:D. Double butted spokes are awesome.
I really want the bike to not look like a mess so I decided to first break down the frame and xtracycle and paint them. I think itll be easier to catch the imagination of someone if it looks a little finished. some of the builds lately have really raised the bar as far as clean builds go. Since its crappy out, I used my dungeon of a basement as a paintbooth:D
Lunch breaks over, more to come....WIP