Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free > Open ReVolt: open source DC motor controller
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-22-2010, 01:08 AM   #1 (permalink)
Modding for Eris
 
Thalass's Avatar
 
Join Date: Dec 2007
Location: North Bay, Ontario, Canada
Posts: 129

SilverCivic - '08 Honda Civic
90 day: 28.69 mpg (US)
Thanks: 39
Thanked 11 Times in 8 Posts
Cougar in a Motorcycle

Hey folks. I've been gearing up to start a 72v motorcycle conversion. I have been intending to buy an altrax 7234 or 7245, but JohnStan's posts in the AEVA forums have got me thinking about the OpenRevolt. Partly because it is apparently cheaper than an altrax, but also because I like building electronics!

I have a few questions though.

How big is a typical openrevolt controller? Space (and weight) will be limited on my bike. The 7245 is 8.44 x 2.80 x 5.75 inches (the 7234 is smaller of course).

How does the controller handle 72v? I imagine it shouldn't have any trouble. Would it be possible to use lower-spec components for 72v? I'm not sure what the current requirements will be, yet.

And lastly: Being open source, I guess the controller is extremely customisable, but how do you connect to it, and what's the software like to use? I run ubuntu on my laptop, so i'm not too bad with command line and that sort of thing.


Sorry if these questions are obvious. I'm still searching through the hundreds of threads here to find the answers, but I thought I should ask too. Thanks!

__________________
Making do with a Honda Civic. Tesla Model 3 reserved. Still kinda want an SVX for fun, though.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-26-2010, 09:09 AM   #2 (permalink)
Out of my mind, back in 5
 
Join Date: Nov 2009
Location: Malmoe, SWEDEN
Posts: 124
Thanks: 1
Thanked 5 Times in 5 Posts
Now I'm certainly not one of the experts, but I know the answers to this!... Just wait a while and the experts will come along though...

The Cougar is modular, ie a control board and a powerboard... So yes you can spec the powerboard to handle lower voltage, altough I'd probably keep that as a margin for upgrades and just lower the spec a little (say 96V?)... Just enough to save space...

The size of the Cougar is really up to you... The tighter you manage to buch things together the smaller it gets... Using the prefabricated powerboard it will be larger than the Altrax, but if you are swapping those components you could potentially slim it down a lot...

You connect to it using a com-port and software, I'm not sure if that software is windows only, but if so wine should solve that... The largest problem would probably be to find a computer with a laptop today, or a USB com-port adapter that works (they have a tendancy not to follow standards)...
__________________
  Reply With Quote
Old 07-26-2010, 07:53 PM   #3 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,830

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,366
Thanked 1,115 Times in 730 Posts
The software is actually able to be modified in both windows and linux. I use Ubuntu and also windows.

The com port adapter works well on everyone's computer that I have talked to. Fran took care in dealing with the timing issues that come up from using an adapter.
__________________
kits and boards
  Reply With Quote
Old 07-29-2010, 09:42 AM   #4 (permalink)
Modding for Eris
 
Thalass's Avatar
 
Join Date: Dec 2007
Location: North Bay, Ontario, Canada
Posts: 129

SilverCivic - '08 Honda Civic
90 day: 28.69 mpg (US)
Thanks: 39
Thanked 11 Times in 8 Posts
Thanks for your help! I don't have a huge amount of experience building circuits from scratch, so i'm not sure i should attempt something that could potentially have me thrown from a moving vehicle at speed if i screw it up! I can solder well, though, and it is very tempting, cost permitting. I'll have to do more research!
__________________
Making do with a Honda Civic. Tesla Model 3 reserved. Still kinda want an SVX for fun, though.

  Reply With Quote
Old 07-30-2010, 02:50 AM   #5 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
The simplest possible power stage can be made from just one 2-pack igbt and a capacitor! Doing that for my own bike project.
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 07-30-2010, 06:19 AM   #6 (permalink)
Out of my mind, back in 5
 
Join Date: Nov 2009
Location: Malmoe, SWEDEN
Posts: 124
Thanks: 1
Thanked 5 Times in 5 Posts
Quote:
Originally Posted by jackbauer View Post
The simplest possible power stage can be made from just one 2-pack igbt and a capacitor! Doing that for my own bike project.
Hmmm... You know, with the power requirements of a bike, that might be dang near perfect...
__________________
  Reply With Quote
Old 07-30-2010, 07:49 AM   #7 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
should work fine. i'm using two old 3rd gen fuji 800amp igbts in my car right now. handle 500amp accelerations no probs. A more modern 5th or 6th gen 600amp two pack would work even better.
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 08-02-2010, 01:56 AM   #8 (permalink)
Modding for Eris
 
Thalass's Avatar
 
Join Date: Dec 2007
Location: North Bay, Ontario, Canada
Posts: 129

SilverCivic - '08 Honda Civic
90 day: 28.69 mpg (US)
Thanks: 39
Thanked 11 Times in 8 Posts
Would you be able to show me a schematic of how you're doing your power board? I'm looking at the schematic from the wiki, and there are 10 mosfets in the power section, with individual triggers, by the look of it. Is this done so the circuit can handle the sort of power needed, with the mosfets triggered together?
__________________
Making do with a Honda Civic. Tesla Model 3 reserved. Still kinda want an SVX for fun, though.

  Reply With Quote
Old 08-02-2010, 03:25 AM   #9 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
Quote:
Originally Posted by Thalass View Post
Would you be able to show me a schematic of how you're doing your power board? I'm looking at the schematic from the wiki, and there are 10 mosfets in the power section, with individual triggers, by the look of it. Is this done so the circuit can handle the sort of power needed, with the mosfets triggered together?
Yeh the fets are paralleled to handle the current. Same with the flyback diodes. Have a look at these videos i made of initial tests:







Connection is very simple. You just use 2 resistors and a fast diode. I'm getting into a bike conversion myself (cbr600 with twin motors) so i'll probably be designing a compact version hopefully 500amp capable.
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 08-02-2010, 04:59 AM   #10 (permalink)
Modding for Eris
 
Thalass's Avatar
 
Join Date: Dec 2007
Location: North Bay, Ontario, Canada
Posts: 129

SilverCivic - '08 Honda Civic
90 day: 28.69 mpg (US)
Thanks: 39
Thanked 11 Times in 8 Posts
I'll be very interested to see how you do that haha!

I do like electronics, and i'm good with a kit, but going from that to design seems to be a big step - in my mind, at least.

__________________
Making do with a Honda Civic. Tesla Model 3 reserved. Still kinda want an SVX for fun, though.

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric Motorcycle conversion bennelson Fossil Fuel Free 315 01-27-2018 03:51 PM
Golf cart based electric motorcycle build. Ryland Fossil Fuel Free 104 09-24-2013 09:25 AM
Range-extender Sidecar for EV motorcycle bennelson Fossil Fuel Free 50 05-25-2009 02:21 AM
What would you look for in an electric motorcycle kit? Ryland Fossil Fuel Free 3 05-07-2009 04:42 PM
Extreme Electric Motorcycle conversion for Publicity/Charity - in Motorcycle forum! bennelson Fossil Fuel Free 0 11-17-2008 06:07 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com