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 05-25-2010, 05:07 PM   #31 (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
Well, I started my waterproofing solution for the controller.

I stopped at the thrift store and bought the largest toaster over they had. (on sale, 25% off!) I figured it will get some use on various other future projects.

I baked the ENTIRE controller for a couple hours total. The logic board has all those little gate resistor wires connecting it to the power board. I wasn't about to desolder all those!

After I pulled the controller from the oven, I sprayed down the logic board with a clear, acrylic-based topcoat. It's gloss, so it makes the control board look nice and shiny!

Right now, the board is drying. Then I plan to put the original cover back on, and use silicon sealant to weatherproof on the lid and the clear plastic ends.

__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-26-2010, 07:04 PM   #32 (permalink)
Joe
 
Join Date: Feb 2009
Location: phx
Posts: 260
Thanks: 0
Thanked 48 Times in 38 Posts
Good info here!

Just to add a tidbit, I haven't had a problem yet with moisture, but that probably isn't surprising given that humidity in PHX is often around 15% or less. I've driven in the rain before too, but that would still only be a few consecutive days of slightly more humid conditions.

I'm glad I read through this thread though, since coating the board sounds like a good thing to do anyway and I plan on building another controller at some point.
__________________
ReVolt AZ testing thread:

http://ecomodder.com/forum/showthrea...ting-9325.html
  Reply With Quote
Old 05-26-2010, 09:02 PM   #33 (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
In taking out the controller, I also did some testing with the voltmeter from controller and motor to the frame of the car.

There is some spare voltage floating around. I think that all the rain soaking we have been having around here could also have been conducting parts of things to other parts of things in a bad way.

I might have to just look over every single battery cable, connection and post to see where that's coming from.
__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos
  Reply With Quote
Old 05-27-2010, 12:05 AM   #34 (permalink)
EcoModding Apprentice
 
apowers's Avatar
 
Join Date: Aug 2009
Location: Tn
Posts: 126
Thanks: 14
Thanked 19 Times in 16 Posts
I have FLA batteries and get an acid mist build up that does carry voltage to the frame but I don't think it carries enough current to harm anything. I hope.
Alvin
  Reply With Quote
Old 05-27-2010, 12:53 PM   #35 (permalink)
faster Fiero
 
Join Date: Apr 2009
Location: Appleton, Wisconsin
Posts: 55
Thanks: 1
Thanked 4 Times in 4 Posts
I get the same thing with my FLAs. Right now if I measure from my 108 volt lead to ground I get 56.8 volts. I can feel it if I hold the lead and touch ground with my forearm. I can't really feel it if I use both hands (caloused hands). I tried to see if it was enough current to light a 12 volt bulb. It wasn't. I have found that as you measure down the battery chain, you will find the guilty culprit. About the middle of my pack I have a battery that measures 6.4 volts (6 volt battery) from positive to negative terminals. But from positive terminal to ground is a positive 5.8 volts and from negative terminal to ground is a negative .8 volts. This has happened to me before, and I just pulled that battery and cleaned it really good with baking soda/water solution, and the problem went away- for a while.

Hondo
  Reply With Quote
Old 05-28-2010, 01:23 PM   #36 (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
I weatherproofed the controller.

Baked that sucker in the toaster overn, then caulked the whole thing with clear silicone.

Hope that helps!


__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Paul & Sabrina's cheap DIY 144v motor controller MPaulHolmes Open ReVolt: open source DC motor controller 7381 08-02-2023 10:55 PM
Hybrid PWM/Contactor controller turbo-boost bennelson Fossil Fuel Free 24 05-12-2011 10:26 AM
Open ReVolt - Pre build controller Nick Nameless Fossil Fuel Free 9 12-11-2009 11:45 AM
Revolt Open Source DC Controller Beta Testing jyanof Fossil Fuel Free 18 08-04-2009 11:43 AM
Fun with Voltage Controller Heatsinks Dradus Fossil Fuel Free 14 05-02-2008 03:16 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