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 01-03-2009, 04:29 AM   #91 (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'm an idiot...

Hello everyone! I'm an idiot! I killed the mosfets. oops. I should have only installed 1 or 2 for testing instead of 5. Oh well, I have 5 more that I can mess with. From now on, one at a time! There are a few things that could have caused them to fail in a short circuit state that I can think of:

1. I kept plugging and unplugging batteries and stuff in strange orders, and occasionally I think I maybe plugged the wrong thing to the wrong thing. I need to label the wires. hehe.

2. Maybe I should use an actual on/off switch instead of trying to put alligator clips onto battery terminals. That might make voltage spikes as it turns on and off, especially when I did the 60v test. There could have easily been a spike of 40v over I bet. And mosfets don't tolerate going over their rated voltage AT ALL!

3. I'm an idiot.

__________________
kits and boards
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 01-03-2009, 11:16 AM   #92 (permalink)
Losing the MISinformation
 
Intrigued's Avatar
 
Join Date: Oct 2008
Location: Southern Missouri
Posts: 393

Quad Cam - '00 Oldsmobile Intrigue GX
Last 3: 25.94 mpg (US)
Thanks: 15
Thanked 3 Times in 3 Posts
Spiking the mosfets... sounds like a dance...

Ouch.

Well, you could be nicer to yourself, and say "too impatient" or something like that. I guess the only difference in you and most of the rest of us is that you had to go and tell the rest of us about it.

Oh, and Sabrina, don't let him get too close to any forks...
__________________


The brake pedal is my enemy. The brake pedal is my enemy. The brake pedal...
  Reply With Quote
Old 01-03-2009, 11:25 AM   #93 (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
It's OK to wreck things.

Just fix it and do it better the next time.

I've done worse!
http://ecomodder.com/forum/showthrea...s-up-2809.html


`
__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos
  Reply With Quote
Old 01-03-2009, 11:53 AM   #94 (permalink)
Losing the MISinformation
 
Intrigued's Avatar
 
Join Date: Oct 2008
Location: Southern Missouri
Posts: 393

Quad Cam - '00 Oldsmobile Intrigue GX
Last 3: 25.94 mpg (US)
Thanks: 15
Thanked 3 Times in 3 Posts
Contributions???

Hey, Ben: Make Paul up one of those donation goal charts. Maybe he can get a few donations to help replace those Mupp... I mean mosfets that he spiked!
__________________


The brake pedal is my enemy. The brake pedal is my enemy. The brake pedal...
  Reply With Quote
Old 01-03-2009, 11:59 AM   #95 (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
Quote:
Originally Posted by Intrigued View Post
Hey, Ben: Make Paul up one of those donation goal charts. Maybe he can get a few donations to help replace those Mupp... I mean mosfets that he spiked!
I'm working on it.

I finally convinced him to give me his PayPal info so I could get a donation point going!

I was thinking that maybe the graphic should be a stack of mosfets that gets taller as he gets closer to the goal.
__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos
  Reply With Quote
Old 01-03-2009, 12:06 PM   #96 (permalink)
Losing the MISinformation
 
Intrigued's Avatar
 
Join Date: Oct 2008
Location: Southern Missouri
Posts: 393

Quad Cam - '00 Oldsmobile Intrigue GX
Last 3: 25.94 mpg (US)
Thanks: 15
Thanked 3 Times in 3 Posts
Quote:
Originally Posted by bennelson View Post
I was thinking that maybe the graphic should be a stack of mosfets that gets taller as he gets closer to the goal.
LOL! Have "The Count" counting them as they go up...
__________________


The brake pedal is my enemy. The brake pedal is my enemy. The brake pedal...
  Reply With Quote
Old 01-03-2009, 01:54 PM   #97 (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
Ben, you're right! I'm going to fix it and do it better. I have a running list in my mind about what I can do differently. I'm off to home depot right now to get a few switches, maybe a higher power soldering iron, I'll shorten the leads to the motor (because that can cause problems with voltage spikes too).

Intrigued: My wife told me I could only have a bowl of cereal this morning (it uses a spoon). I was impatient... There, I said it... I watched Dr. Phil, Oprah's protege, and he told me that I need to learn to forgive myself.

These practice mosfets are only $3 each, so I'm glad I'm learning how to break them, so I can learn how NOT to break the $15 dollar ones!
__________________
kits and boards
  Reply With Quote
Old 01-03-2009, 06:02 PM   #98 (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
It works again!

I removed the 5 bad mosfets, and added a single mosfet. Now there are switches too! No more confusing unplugging and plugging. The wheel turns just fine with just one mosfet! The EVTech people feel that I need to add HARDWARE current limiting, and that could have contributed to the failure. I didn't mention that there was no current limiting at all. hehe. I'll definitely do that for the car's version, although I still think it can be done in software. Ian is still driving around with his 144v 600amp controller with software current limiting.

I'm going to look at the behavior of the mosfets with the oscilloscope later, but I have to get ready for class on monday! dang it!
__________________
kits and boards
  Reply With Quote
Old 01-03-2009, 06:49 PM   #99 (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
Hey Everyone,

This is a great project that is worthy of our support.

If you have the means, please contribute. All contributions go straight to purchasing parts for the project.



To contribute, please visit my blog at:
Green Cars: Videos and More!
and "Adopt a Mosfet"

`

[EDIT]: I removed the link I had here, as it didn't seem to work. The CONTRIBUTE button on my blog seems to work fine. Wish I could figure how to embed it here though!
__________________


300mpg.org Learn how to BUILD YOUR OWN ELECTRIC CAR CHEAP
My YouTube Videos

Last edited by bennelson; 01-03-2009 at 10:21 PM..
  Reply With Quote
Old 01-03-2009, 07:03 PM   #100 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,528

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
Thanks: 4,078
Thanked 6,977 Times in 3,613 Posts
Adopt a Mupp... I mean mosfet! I'll adopt one.
Quote:
It's time to get things started!
On the most sensational inspirational celebrational Mosfetational
This is what we call the Mosfet Show!

__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Reply  Post New Thread




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 06:43 PM
Paul & Sabrina's Cheap EV Conversion MPaulHolmes Fossil Fuel Free 542 11-12-2016 10:09 PM
Three Dirt Cheap DIY Electric Cars - Part 5 SVOboy EcoModder Blog Discussion 0 12-12-2008 05:10 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