Search found 59 matches

by Tom Thomson
Thu Oct 11, 2007 12:49 am
Forum: General
Topic: New web site
Replies: 5
Views: 3989

New web site

I have stumbled upon a good site for general interest "EVAlbum" which has pics and write up's on many ev's, both production and conversions. One thing I don't understand tho, with the same motor, controller, voltage and vehicle size all those guys are going much faster and farther than I. ...
by Tom Thomson
Wed Oct 10, 2007 12:04 am
Forum: All things battery related
Topic: Readymade lithium iron phosphate packs
Replies: 16
Views: 15505

I long ago gave up being embarassed when flaunting my ignorance so here I go again. What is "C" when referring to battery output?
tommyt
by Tom Thomson
Tue Sep 18, 2007 10:29 am
Forum: All things battery related
Topic: capacitors
Replies: 1
Views: 3596

capacitors

I'm new here so I may have missed it. Have you had any discussion about capacitors as a battery replacement (not an assist) ?
tommyt
by Tom Thomson
Sat Sep 15, 2007 11:17 pm
Forum: Conversions
Topic: Range Calculation
Replies: 21
Views: 2014

Amp draw

Geeky;
My Dodge Ram 50 (Mitsubishi) pickup pulls 90A at 30-32 mph. I have 6 deep cycle 12V lead acid batterys. I am new at this but my range appears to be 15-20 miles. An acquaintance of mine says range can be roughly estimated at 1 mile for 20# of lead.
tommyt
by Tom Thomson
Thu Sep 13, 2007 12:16 am
Forum: General
Topic: Educate me!
Replies: 5
Views: 5056

Hey Cat; Thanx for the reply. The back emf reasoning makes sense, I had not thought of that. Is the emf dependant on rpm, current or both? If both, in what proportions? Can it be overridden with increased voltage? My truck goes faster with 72V than it did with 36V and I'll bet it would be faster yet...
by Tom Thomson
Mon Sep 10, 2007 12:18 am
Forum: General
Topic: Educate me!
Replies: 5
Views: 5056

Tim As a series wound, the motor has no max rpm. It will keep right on spinning til it scatters itself. The motor speed that I am getting appears to be abt 3500 rpm. I say appears because I have no tach at this point; the speed is calculated from road speed. tommyt
by Tom Thomson
Sat Sep 08, 2007 12:48 am
Forum: General
Topic: Educate me!
Replies: 5
Views: 5056

I just put some larger tires on the back and as expected the truck goes faster and pulls more amps. I think I learned something but I don't know what.
by Tom Thomson
Thu Sep 06, 2007 10:38 pm
Forum: General
Topic: Good link to convert EV skeptics
Replies: 26
Views: 20597

Many of the posts on this subject seem to imply that the car companys are deliberately withholding EVs. What incentive do they have to do this? If the manufacturers (cars or any other product) are good at anything, it is producing an item that the public wants to buy. tommyt
by Tom Thomson
Thu Sep 06, 2007 10:26 pm
Forum: General
Topic: Educate me!
Replies: 5
Views: 5056

Educate me!

I have an '82 Dodge Ram 50 (Mitsubishi) pickup running 72V (lead acid) with a D&D series wound motor and an Alltrax 7245 controller. I should add that I have installed rather small tires - 21 1/2" standing height. It will max out, with the pedal floored, on a level road, at 30 mph while dra...

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