Electric conversion: Project ForkenSwiift - Page 21 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 11-06-2006, 02:01 PM   #201
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
The motor shaft is about
__________________

MetroMPG is offline   Reply With Quote
Old 11-06-2006, 02:03 PM   #202
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Quote:
Originally Posted by The Toecutter
You should seriously consider aeromods to this thing to increase top speed and extend range.
Don't forget this is only going to be a neighbourhood type vehicle. Average speed will probably be 30 km/h.
__________________

MetroMPG is offline   Reply With Quote
Old 11-06-2006, 02:05 PM   #203
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Quote:
Originally Posted by theclencher
Also... that motor adapter plate looks thick enough to withstand a 700 hp big-block Chevy!!!
Which is exactly my plan when I get bored with the electric thing! Just saving on future machining costs...
MetroMPG is offline   Reply With Quote
Old 11-06-2006, 02:25 PM   #204
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
Lateral thinking. Gotta love it.

It'll cause lateral driving too.
MetroMPG is offline   Reply With Quote
Old 11-06-2006, 05:48 PM   #205
Tuggin at the surly bonds
 
Silveredwings's Avatar
 
Join Date: Apr 2006
Posts: 839
Country: United States
Quote:
Originally Posted by MetroMPG
The forklift controller has an "acceleration ramp" built in, and I believe it's also adjustable via a pot. On the plus side (?) We're running relatively low voltage from a small pack, so we're not going to be putting out prodigous amps (relative to the Tesla roadster, for example).
I don't follow that volts-to-amps relationship.

Quote:
Originally Posted by MetroMPG
I thought the soft coupler was pretty clever too, until I talked to a commercial EV builder last week. He suggested we were going to wear out/chew up that urethane spacer in short order, and actually said a fixed connection between the motor & input shaft would have been fine.
If there's any play at all, I would expect it to get bigger, especially if you're planning on supporting regen brakes (alternating torque in either direction - I didn't say it that time ).

I anticipate great things from this project.
__________________
Reality is merely an illusion, albeit a very persistent one. - Albert Einstein
Silveredwings is offline   Reply With Quote
Old 11-06-2006, 06:50 PM   #206
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
This evening: axles out, exhaust removed, shift linkage disconnected.

Quote:
Originally Posted by Silveredwings
I don't follow that volts-to-amps relationship.
At what point did it become apparent that I'm completely winging this?

Quote:
If there's any play at all, I would expect it to get bigger, especially if you're planning on supporting regen brakes (alternating torque in either direction - I didn't say it that time ).
No regen - just "go!" So the wear is in one direction.

Quote:
I anticipate great things from this project.
I anticipate breaking things! All in good fun though.
MetroMPG is offline   Reply With Quote
Old 11-06-2006, 08:12 PM   #207
Registered Member
 
kickflipjr's Avatar
 
Join Date: Sep 2005
Posts: 933
Country: United States
So how much more before you get that thing on the road?
__________________
2008 EPA adjusted:


Distance traveled by bicycle in 2007= 1,830ish miles
Average commute speed=25mph (yes, that's in a car)
kickflipjr is offline   Reply With Quote
Old 11-06-2006, 08:47 PM   #208
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
I don't want to predi
MetroMPG is offline   Reply With Quote
Old 11-07-2006, 06:51 AM   #209
Tuggin at the surly bonds
 
Silveredwings's Avatar
 
Join Date: Apr 2006
Posts: 839
Country: United States
Quote:
Originally Posted by MetroMPG
Theoretically, inside 2 or 3 weeks we could have the electric drivetrain in, so we could hook jumper cables between a couple of batteries and the motor, and off we go! Does that count?
I think that does count. It's the current thing to do.

I don't think jumper cables have enough surface area in contact with the battery cables to handle the current you'd need (even in a test). The clips will probably heat up, and may even burn them at the contact points (you might be shocked to find the battery terminals burned as well), but I may be wrong. Don't let this impede your progress, just keep an eye on it. I read about many EV builders who regularly check and tighten their battery terminal connections because of the effects the high current has on them. One of the advantages of going with higher voltage is lower current:

Volts * Amps = Watts (Watts law)

But you may not be able to change the top voltage your motor/controller can take, so don't get too wired about it.

The other potential problem is the voltage drop across the jumper clips in proportion to the current:

Ohms * Amps = Volts (Ohms law)

So you want to minimize the ohms (unit of resistance) wherever you can: thick cable, heavy duty terminal connections, high surface area connections to your controller, fuse(s), motor, kill switch (eventually), etc. Try to have as little 'etc.' as possible.
__________________
Reality is merely an illusion, albeit a very persistent one. - Albert Einstein
Silveredwings is offline   Reply With Quote
Old 11-07-2006, 09:34 AM   #210
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
As a matter of fact, we a
__________________

MetroMPG is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuelly Android App - eehokie Fuelly Web Support and Community News 2 07-14-2010 09:59 PM
Combined totals of all my vehicles? nizationpcs Fuelly Web Support and Community News 0 03-30-2009 07:41 AM
Vehicle Notes pb Fuelly Web Support and Community News 4 10-08-2008 12:38 PM
Converting numeric to current tire sizes. omgwtfbyobbq General Maintenance and Repair 5 06-01-2007 05:51 AM
Prius. First Impressions zpiloto General Fuel Topics 17 09-03-2006 11:49 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 08:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.