I am using a kelly 72v 400a controller, with a Mars Brushed motor. I believe the number is ME0709, it is commonly called the Etek RT motor. I'm not sure what my peak A draw is yet. My laptop got stolen this week, so I can't connect to my controller yet to see what the settings are. I just finished the bike yesterday, so I took it out for an easy test. I made sure to take it easy on the throttle to get it going. I also have a cycle analyst, but it is a low power unit for my Ebike, I have to get a higher powered shunt to modify it for the motorcycle so that I can get accurate data on the power usage.
On 9/16/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > Matt is correct, we have used much heavier cable on some of the bikes we > built. My current motorcycle that uses a DC motor and an Alltrax 72V 450A > controller is using 1/0 cable for the battery, motor and controller > connections. The Charger wires are 10ga. The bike draws a constant 100A at > 40-45MPH and the 1/0 handles that fine. I think you find 6ga a little on > the small side for a constant 100A. > > What controller are you using? What is the peak A draw? What motor are you > using? > > Shawn > > > Yeah, I have a bunch of 6ga welding wire that I also used on the project. > > I > > was kind of stuck with what came out of the battery pack, so I had it > > switch > > to 6ga after it came out, going to the motor and the controller. I'm not > > sure if I am using the right terminology, I am teaching myself how to do > > this stuff as I go. But the power wires coming out of the pack (which I > > was > > refering to as Lead wires) from which I draw power to go to the motor and > > controller, is 10ga. The charging wires, which I plug the charger into, > > are > > even a smaller ga, it's kind of hard to read it, but I'm guessing it is > at > > least 12ga. I didn't have the charging wires plugged in to anything > while > > I > > was riding the bike, but it appears that those are the ones that got the > > most damage as far as melting inssulation. It was probably just that > they > > got heated up by the power wires that they were next to. All 4 wires are > > coming out of the same hole in the pack. > > > > I purchased the pack from someone online from a forum. I know, buyer > > beware, but he said that he didn't use the pack, he was just going with a > > different battery setup. Someone name Gary (I think his last name is > > Goodrum) from OC Cali built the pack. I had his info on my laptop, but I > > just had my house broken into and they stole my computers and stuff. > > > > > > On 9/16/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > >> > >> Hi Jeremiah, > >> > >> First, congratulations on getting the bike together! Sounds like it'll > >> be fun when you get it back in better shape. > >> > >> Along those lines, I would say that you certainly were not being > >> paranoid about using 10GA wire. Seriously, 10GA for 100A continuous?? I > >> would have used a minimum of 4GA, and if I'm not mistaken, Shawn and I > >> used 2GA on our 48V and 24V bikes. Granted, those hit upper limits of > >> 850 amps or so, but would cruise near the 100A range. > >> > >> Re-reading your post, though, it looks like you're talking about the > >> charging cables for the pack, not the traction cables. Is that correct? > >> You mention "lead wires" later on, so I guess you really are talking > >> about the high current conductors that run back to the controller. > >> > >> May I ask who built the pack and from where you purchased it? > >> > >> Matt Graham > >> Treasurer, Florida EAA > >> http://www.jouleinjected.com > >> > >> > >> -------- Original Message -------- > >> Subject: [FLEAA] Need help with a BMS > >> From: "Jeremiah Johnson" <[EMAIL PROTECTED]> > >> Date: Tue, September 16, 2008 6:24 am > >> To: "FLEAA Mailing List" <[email protected]> > >> > >> Hi everyone. I finally got my first EV motorcycle running and took it > >> for a > >> small test ride down the block. I went about half a block to the stop > >> sign, > >> turned around and started back to my house. I was at about 1/2 throttle, > >> just looking down at everything mechanically moving to make sure > >> everything > >> was good. Then i hear a slight pop, loose power, and some white smoke > >> comes > >> out of my Lifebatt battery pack. I pushed the bike back to the house and > >> pulled out the battery pack. I measured the voltage and still had 52.4 v > >> (had 52.5v when I started). I opened up my pack and saw that the two > >> charging wires going into the pack had some melting of the insulation > >> and > >> there were a couple of components on the circuit board that looked > >> burnt. I > >> think the components MIGHT be able to just be replaced, but I don't > >> trust my > >> soldering skills to do that. Anyone got skills in this area, or know > >> where > >> I can get another BMS from? > >> > >> I think the root of the problem was that the lead wires coming out of > >> the > >> pack were too small of a ga. I had a whole thread on that on another > >> forum > >> and I was bassically told that I was being paranoid and that the 10ga > >> wire > >> would work for my application and to go ahead and run it. The person who > >> built the pack and put 10 ga wires coming out of it, said it was good > >> for > >> 100a continuously. > >> _______________________________________________ > >> Florida EAA mailing list > >> [email protected] > >> http://www.floridaeaa.org > >> > >> > >> > >> _______________________________________________ > >> Florida EAA mailing list > >> [email protected] > >> http://www.floridaeaa.org > >> > > _______________________________________________ > > Florida EAA mailing list > > [email protected] > > http://www.floridaeaa.org > > > > > > _______________________________________________ > Florida EAA mailing list > [email protected] > http://www.floridaeaa.org > _______________________________________________ Florida EAA mailing list [email protected] http://www.floridaeaa.org
