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 07-27-2009, 04:12 AM   #2101 (permalink)
EcoModding Apprentice
 
Join Date: May 2009
Location: Australia
Posts: 109
Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by MPaulHolmes View Post
Go Adam, it's your birthday, light a candle, throw a party! Adam's going to test the voltage limits. I'm really excited. He has 24 12v SlA batteries for testing. Ya!

Beautiful pictures! I have got to get a program like that! I want water coolign too!!!!! not fair!

Google Sketchup, just found out about it a week or so back. Download for free and be 3D modeling in minutes. Loads of video tutorials and all, it is a real hoot.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-27-2009, 10:55 AM   #2102 (permalink)
Master EcoModder
 
Join Date: Apr 2009
Location: Charlton MA, USA
Posts: 463

EVVette - '71 Chevy Corvette Coupe
Thanks: 31
Thanked 183 Times in 94 Posts
Ok, I ran into a problem with testing to find out how high of voltage the components can go. The problem??...I dont have anything that can put a sufficient load on the components. Dose anybody have something I might be able to use or an idea of something to come up with? I dont have the cash right now for much, so the cheeper the better. I was thinking of a forklift pump motor or something comparable that could draw about 100A under a load. I was also thinking of some large stove heating elements, but I dont think I have enough for that idea to work. What do you guys think?


-Adam
__________________
www.EVVette.com - 1971 Corvette Coupe Conversion to all Electric!
www.AdamBrunette.com - Machining, CNC, Robotics and Electronics.

You can download RTD Explorer for the Cougar controllers at www.EVVette.com
  Reply With Quote
Old 07-27-2009, 12:28 PM   #2103 (permalink)
EcoModding Lurker
 
Join Date: Apr 2009
Location: NE iowa
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
adam-
are you worried about the inductive load and all that jazz? or just seeing what power it can handle?
if so you just need something with more resistance than a dead short right?
how about a bucket of saltwater and a anode cathode setup? i really have no clue....but its an idea...oh yeah, if you do that, do it outside and NO SPARKS!
  Reply With Quote
Old 07-27-2009, 06:14 PM   #2104 (permalink)
Master EcoModder
 
Join Date: Apr 2009
Location: Charlton MA, USA
Posts: 463

EVVette - '71 Chevy Corvette Coupe
Thanks: 31
Thanked 183 Times in 94 Posts
Yes, inductive load is very important. It needs to be just like its in a car.

-Adam
__________________
www.EVVette.com - 1971 Corvette Coupe Conversion to all Electric!
www.AdamBrunette.com - Machining, CNC, Robotics and Electronics.

You can download RTD Explorer for the Cougar controllers at www.EVVette.com
  Reply With Quote
Old 07-28-2009, 01:50 AM   #2105 (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
Joe's controller had been going from 0 to 80 amps instantly, and then smoothly from 80 amps on up. I finally figured out what was going on! Ya! Long story short, it's easy to fix. In fact, I don't need a new coupler! The banging I kept feeling was the immediate transition to 80 amps. I just never had a motor current monitor, so I didn't know what it was.

Now I think we need some sort of filter on one end of the controller, and then a fan on the other end, and that will keep the air moving, to extend Joe's controller's life. Maybe the material in a car air filter?
__________________
kits and boards
  Reply With Quote
Old 07-29-2009, 01:23 AM   #2106 (permalink)
Joe
 
Join Date: Feb 2009
Location: phx
Posts: 260
Thanks: 0
Thanked 48 Times in 38 Posts
Quote:
Originally Posted by MPaulHolmes View Post
Joe's controller had been going from 0 to 80 amps instantly, and then smoothly from 80 amps on up. I finally figured out what was going on! Ya! Long story short, it's easy to fix. In fact, I don't need a new coupler! The banging I kept feeling was the immediate transition to 80 amps. I just never had a motor current monitor, so I didn't know what it was.
I tried out the code with the extra line in it, and wow what a difference!

the car is a lot smoother from a stop now and the throttle control actually feels a little better. I guess when you consider that before we gained almost another 20% usable range of throttle, it's quite a difference.

The motor amps can be controlled down into the single digits and I set the max throttlePos to 470. This actually correlates to an output of 487amps (according to the meter i have, anyway) and doesn't trip the overcurrent protection. When I was playing around with it before, 490 amps started to trip the overcurrent protection.

Good work Paul!
__________________
ReVolt AZ testing thread:

http://ecomodder.com/forum/showthrea...ting-9325.html
  Reply With Quote
Old 07-29-2009, 02:22 AM   #2107 (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
Oh, I'm so embarrassed! hahaha!

__________________
kits and boards
  Reply With Quote
Old 07-29-2009, 12:36 PM   #2108 (permalink)
EcoModding Lurker
 
Join Date: Aug 2008
Location: Calgary, AB
Posts: 21

Corolla bandit - '05 Toyota Corolla CE
Thanks: 1
Thanked 1 Time in 1 Post
Quote:
Originally Posted by adamj12b View Post
Yes, inductive load is very important. It needs to be just like its in a car.

-Adam
You could pick up a coil of wire from a hardware store, attach all three conductors in parallel, add a resistive heater in series, and you have a good simulator of an electric motor. I did a really rough calculation on this coil and got 1mH, but it isn't well wrapped, so say 1/100 of that, so 10uH. I wouldn't put more that 45Amps through the 3 wires without a fire extinguisher nearby.
  Reply With Quote
Old 07-29-2009, 01:56 PM   #2109 (permalink)
Joe
 
Join Date: Feb 2009
Location: phx
Posts: 260
Thanks: 0
Thanked 48 Times in 38 Posts
Quote:
Originally Posted by dlaing View Post
I wouldn't put more that 45Amps through the 3 wires without a fire extinguisher nearby.
I've read about people submersing their test inductor and resistor in a bucket of water. Keeps them cool enough to withstand brief tests of high current. Might work better with wires that aren't plastic insulated...

I actually tried this on a smaller scale when testing my charger. I have a heating element out of a space heater and couldn't get up to 20A without it glowing red hot. Tossed it in a bowl of water and no problems, though the water turned a funky green color, so I didn't do it again.
__________________
ReVolt AZ testing thread:

http://ecomodder.com/forum/showthrea...ting-9325.html
  Reply With Quote
Old 07-29-2009, 05:12 PM   #2110 (permalink)
Electronics Packrat !!!
 
Royal's Avatar
 
Join Date: Jun 2009
Location: Indiana
Posts: 15
Thanks: 0
Thanked 1 Time in 1 Post
I am trying to set up Paul's AVR program on VMLAB simulation software. As I am not good at programming I need a good copy of a VMLAB project file for Paul's software. If anyone has set this up on VMLAB please help me with this. Royal

__________________
Have a great EV day !!! Please Donate !!!
"Help FIX the 144V Open Source Motor Controller" !!!
Link is (http://greencarvideos.blogspot.com/)
  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