Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-16-2009, 05:24 PM   #31 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 266 Times in 209 Posts
If on the outside chance I got it for ~$100, I was going to take it as a sign that it belonged on my 250, yes

__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-16-2009, 05:26 PM   #32 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: London, Ontario
Posts: 1,096

2k2Prot5 - '02 Mazda Protege5
90 day: 33.82 mpg (US)
Thanks: 0
Thanked 11 Times in 8 Posts
haha... 200lb motor on a 350lb bike. You could do a burnout till your rim wore down.
  Reply With Quote
Old 04-16-2009, 09:49 PM   #33 (permalink)
Lurking footless halls
 
Silveredwings's Avatar
 
Join Date: Dec 2007
Location: northeast
Posts: 249

Dark Horse - '16 Ford Mustang GT convertible Premium

Gutless Beauty - '19 Toyota Corolla SE
Thanks: 3
Thanked 3 Times in 3 Posts
Alternative for a motorcycle: Advanced DC 140-01-4003 Motor, asking 300 since 2/15/09

(no relation to me)
__________________
Any sufficiently advanced technology is indistinguishable from magic. - Clarke's Third Law
  Reply With Quote
Old 04-16-2009, 10:57 PM   #34 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,822

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,365
Thanked 1,107 Times in 726 Posts
Quote:
Originally Posted by dcb View Post
Well this one is like $60 shipped
PRX - IGBT CM600HA-24H Power Module 1200V 600A - eBay (item 290049066472 end time Apr-27-09 14:17:07 PDT)

I guess the "dual" response would be, how much efficiency gain are we talking about, and is it only at full throttle, vs cost/complications, ya know. Is it good enough to get started with, kinda sounds like it will handle 48 volts 300+ amps no problem. Throw some pwm at it and monitor the current I recon.

Also the synch gains are probably frequency dependent.
I used to have 4 of those. Instead of making a controller, I hawked them on Ebay! They are the older ones, that can't really switch much above 8KHz. Lee Hart said that they need to be derated to 1/3 (continuous??? I forgot) of their current rating. The Tesla guy used some IGBTs in his homemade controller for his electric Porsche.

__________________
kits and boards
  Reply With Quote
Old 04-17-2009, 07:51 AM   #35 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 266 Times in 209 Posts
That's purdy

So lower frequency = less diode losses, but the noises your motor makes will be in the audible spectrum? And at some point bits might get "saturated"?
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 04-17-2009, 09:07 AM   #36 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: London, Ontario
Posts: 1,096

2k2Prot5 - '02 Mazda Protege5
90 day: 33.82 mpg (US)
Thanks: 0
Thanked 11 Times in 8 Posts
I don't think that lower freq = less diode loss. Diode loss is relative to the current*offtime. You get less SWITCHING loss from lower frequency.

If you want to be really cool you could make your controller match the frequency of an ICE as it goes through the revs

  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
AC vs DC for DIY MazdaMatt Fossil Fuel Free 15 03-06-2009 10:33 AM
Neil Young's Ideas to Save the Big 3 SuperTrooper The Lounge 1 11-22-2008 03:29 PM
Metro XFi sells on eBay for $7k. Are efficient used car prices going up? MetroMPG General Efficiency Discussion 16 05-29-2008 07:51 AM
AC Induction Motor used as Brushless DC? WaxyChicken Fossil Fuel Free 5 01-29-2008 10:26 PM
Alternative to big motor and big $$$? WaxyChicken Fossil Fuel Free 16 01-29-2008 12:02 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com