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 12-23-2010, 10:24 PM   #4141 (permalink)
dwffy
 
Join Date: Jul 2009
Location: Calgary - Canada
Posts: 37
Thanks: 0
Thanked 1 Time in 1 Post
ga2500ev,
Thanks a lot for the explanation, it sure makes it clear now.
Much appreciated.
Have a blessed Christmas Folks!
-Doug.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-24-2010, 12:36 AM   #4142 (permalink)
EV test pilot
 
bennelson's Avatar
 
Join Date: Jan 2008
Location: Oconomowoc, WI, USA
Posts: 4,435

Electric Cycle - '81 Kawasaki KZ440
90 day: 334.6 mpg (US)

S10 - '95 Chevy S10
90 day: 30.48 mpg (US)

Electro-Metro - '96 Ben Nelson's "Electro-Metro"
90 day: 129.81 mpg (US)

The Wife's Car - Plug-in Prius - '04 Toyota Prius
90 day: 78.16 mpg (US)
Thanks: 17
Thanked 663 Times in 388 Posts
Dwffy,

I did a "contactor turbo-boost bypass" some time back in my Electro-Metro.

It was just a fun, wierd experiment. At that time, the car was setup for 72V, and I only had a 72V controller.

By using a dual-action contactor, I could disconnect the 72V controller, and directly connect in two more batteries - for 96V and more top speed.

It was fun and a little scary.

In that case, it allowed me to test out a higher top speed, and was a cool little experiment.

It's so much easier/simpler/better to just go with a higher voltage controller. Unfortuntely, they get expensive really fast. Building one yourself like the Cougar/Open ReVolt is a great way to go and keeps costs down, while maximizing performance.
__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos
  Reply With Quote
Old 12-24-2010, 12:47 AM   #4143 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,362
Thanked 1,202 Times in 765 Posts
Merry Christmas and Kwanzaa!

Interesting Kwanzaa facts:

1. Kwanzaa means "first" in kiswahili.
2. It goes back THOUSANDS of years, all the way to 1966 A.D., where it was invented at California State University.
4. I can't think of any more interesting Kwanzaa facts.

Hey! I'm almost done with the 1000 amp controller! Well, not really, but I just wanted to say that to make a couple people feel better.
__________________
kits and boards
  Reply With Quote
Old 12-24-2010, 06:15 AM   #4144 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 304 Times in 171 Posts
Whats the chances of getting the controller to operate with a 0-5v signal from a hall effect throttle such as this unit:
Throttle Foot 0-5V Hall Effect Type,JCTH,EV Throttle Foot 0-5V Hall Effect Type,Chennic Technology Co.,Ltd.
__________________
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 12-24-2010, 01:29 PM   #4145 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,362
Thanked 1,202 Times in 765 Posts
How does a hall effect throttle work? Like if You had one lead hooked up to the A/D input, and one lead hooked to ground, when you hit the throttle, does the wire connected to the A/D input vary from x to y (0 to 5v or whatever)?
__________________
kits and boards
  Reply With Quote
Old 12-24-2010, 01:39 PM   #4146 (permalink)
Mark Weisheimer
 
Join Date: Aug 2009
Location: Columbus Ohio
Posts: 62
Thanks: 8
Thanked 13 Times in 10 Posts
Quote:
Originally Posted by MPaulHolmes View Post
How does a hall effect throttle work? Like if You had one lead hooked up to the A/D input, and one lead hooked to ground, when you hit the throttle, does the wire connected to the A/D input vary from x to y (0 to 5v or whatever)?
Yes, that is what it does with the Curtis hall effect foot pedal.
I think that the Chennic one is the same.

Last edited by Weisheimer; 12-24-2010 at 01:41 PM.. Reason: change is to it...and chenic to chennic...
  Reply With Quote
Old 12-24-2010, 02:48 PM   #4147 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,362
Thanked 1,202 Times in 765 Posts
Great! I'll add that to the board. I hear they are more reliable than potentiometers.
__________________
kits and boards
  Reply With Quote
Old 12-29-2010, 04:39 AM   #4148 (permalink)
EcoModding Apprentice
 
Join Date: Oct 2010
Location: southland NZ
Posts: 153
Thanks: 38
Thanked 86 Times in 55 Posts
Hi Guys
I have my Christmas present (controller kit) and I am plucking up the courage to start work
(the boss says I have some other work to do first)

As part of the preparation is it a good idea to tin the copper buss bars?

I thought that I had read it somewhere - on the Australian site?
But I can't find the reference

Should I tin?
  Reply With Quote
Old 12-29-2010, 12:05 PM   #4149 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,832

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,362
Thanked 1,202 Times in 765 Posts
I ordered some tinnit bright tin plate, and it turned out really splotchy and looked like crap, but maybe a lousy tinning job is better than nothing? At any rate, it would probably only be necessary to tin the spots where you bolt the bus bars to the motor cable (right at the tips). If you just sand the bars just a bit with some fine sand paper during assembly, that should be fine because you have to put that silver conductive epoxy on them before bolting them to the power board, and that epoxy stuff keeps out the oxygen and basically glues most of the bar to the power board.
__________________
kits and boards

Last edited by MPaulHolmes; 12-29-2010 at 02:45 PM..
  Reply With Quote
Old 12-30-2010, 06:30 PM   #4150 (permalink)
EcoModding Lurker
 
Join Date: Nov 2010
Location: Richmond Michigan
Posts: 10
Thanks: 1
Thanked 1 Time in 1 Post
Quote:
Originally Posted by MPaulHolmes View Post
Great! I'll add that to the board. I hear they are more reliable than potentiometers.
While on this subject a couple of questions,

First question;
When you say you will "add it to the board," are you talking hardware or softwear?

If it's software, can be loaded in by us using Adams program or does it need to be done at your end?

Next question;
I'm using a Alltrax right now in the tractor that the P&S controller will go into. The Alltrax has a handy input pin called 1/2 speed reverse. What it does is reduce power through out the entire throttle movement. I have no idea how they do it.

I can say it is very useful in two ways.
Even at 48 volt,s the tractor will wheelie violently in third (top) gear when full throttle is applied. You can be sure 15 mph is scarry on a garden tractor as well. I can't imagine what it will be like at 120 or 144 volts. I always start a new driver out on half speed for a while.
Then there is backing up to the weight transfer sled to have the chain hooked. I find it a lot easier and smoother to use 1/2 speed in tight spots with people behind me.
Finally there is loading.

Barring Paul or someone saying all you need to do is add this wire to this pin and program this, I was wondering if a simple switch or relay to add in a resistor parallel to the throttle signal line. So instead of 5k ohms for full throttle it would be 2500 or maybe even less.

Doable?

Finally Is there an official Open Re Volt decal I can put on the controller cover/

Be glad to purchase a few if there is.

If you don't have instock decals do you have artwork I can take in and have something made up.

Have a great New Year,
Jim

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Paul and Sabrina's Cheap 3 Phase Inverter (AC Controller) with Field Oriented Control MPaulHolmes Fossil Fuel Free 3431 05-04-2022 05:43 PM
Paul & Sabrina's Cheap EV Conversion MPaulHolmes Fossil Fuel Free 542 11-12-2016 09:09 PM
Three Dirt Cheap DIY Electric Cars - Part 5 SVOboy EcoModder Blog Discussion 0 12-12-2008 04:10 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com