These diagrams have the great merit of showing the whole picture of what goes into a conversion. However, a schmuck like me end up with a lot of questions... I understand that these are reposts of previous schematics, lost back when the site went bonkers, and I appreciate you bringing that up again. However, it would be nice if you guys could point us newbies to a construction article, if it exists somewhere, so that I could observe and hopefully not have to bare my ignorance with dumb questions...
Just an opinion, please don't be mad at this old guy!
I'm not billmi, but i'll try to answer some of your questions
http://www.hobbycity.com/hobbycity/s...itor_2-8S_Lipo, and here: http://endless-sphere.com/forums/vie...p?f=14&t=17189
In my setup, i'm using the distributed version, so i have 36 individual monitor/shunt boards and one control board.
Buy the book: Build Your Own Electric Motorcycle
The use of the Cell logs is for monitring only and does not balance cells. It'l only tell you which ones are low/high. They're some logic circuitry required to get them to disconnect the contactor or set an alarm.
Diversion-black-right side.jpgThank you Tango and Frodus! Slowly I am getting the hand of it.
At the risk of diverting this thread, I will make a question: what do you guys think of a yamaha XJ400 Diversion as donor?
I stumbled at it while browsing a "second-hand everything" site in hebrew. Many guys here post ridiculously low prices just to jolt you on the phone with the question "are you serious about buying?". I find it rude, like the infamous "show me the money" stitch... Anyway, since the bike is from 1993, I called (the guy speaks english... lucky me!) and he answered that the price (around US$400) is right, because... one of the cylinders is cracked (whatever he means by that - I will go see the bike tomorrow). Anyway, I goggled it and found some info, like wheel bearings prone to wear, and "low power (@44HP) compared with the ninja 500 and other competitors at the time, but nothing serious or problematic with the behavior of the bike.
The picture is one I got from the net (and it is a 600, not 400). The site did not let me copy the "actual" girl.
Do you guys have any input to share?
Last edited by eronsilva; 25 October 2010 at 1316. Reason: learning what "insert in line" means...
start a thread about your first build.... rather than 2 or 3 different threads. Believe me, it'l be much easier when you finally get down to buying stuff and you don't have to search in 10 places for something
Finally sat down to revise my schematic....ninjaconversion_schematic_0.91.jpg
Here/s rev 0.91. I decided to simplify things a bit getting rid of the aux battery, in favor of a DC/DC converter alone for 12v power. I also added another relay so that the 72v to the controller's inputs is switched fully off, while the line to B+ is bridged with a resistor to trickle power into the capacitors.
As always, thoughts, feedback, wacky ideas and catching my mistakes are greatly appreciated.
Last edited by billmi; 01 December 2010 at 1627.
I've been kicking around the pros and cons of DC/DC and/or 12v auxillary battery. I'm planning on doing some tests tonight. I've also started sketching up my wiring diagram, but I need to find a nice, simple and free drawing package to lay it out with.
I asked this a while back, it basically came down to the fact that if your traction pack goes down for any reason (DC/DC fails, contactor fails, battery short, other shorts, etc) and you don't have a battery, the entire electrical system will go out. The battery is more of an insurance policy so that if primary traction pack fails, you'll still have a working 12V electrical system. Honestly, this doesn't sem like as big of a deal as in a car (power steering/brakes), but it could certainly be an issue.
As for a drawing program, If you use a mac, OmniGraffle is what i used, and there is a trial version you can use.