[ausev] jeep ev without tranny?

[Ben Jarrett]

What rpm is the motor at at 30 mph?  72V seems pretty low.   This is very 
helpful info.

thanks,
-ben



________________________________
From: Marc Kohler <mkohler at austin.rr.com>
To: AustinEV News Announcements and General Discussion <ausev at austinev.org>
Sent: Thu, March 24, 2011 1:48:32 PM
Subject: Re: [ausev] jeep ev without tranny?


Ben,
I’ve hooked up a 9” Netgain DC motor with 72V/1200A controller directly to the 
rear driveshaft on a 2008 GMC 1500 (½ ton) truck.  Very slow and low top speed 
(20-30 mph?)
Marc Kohler
 
From:ausev-bounces at austinev.org [mailto:ausev-bounces at austinev.org] On Behalf Of 
Ben Jarrett
Sent: Thursday, March 24, 2011 1:40 PM
To: ausev at austinev.org
Subject: [ausev] jeep ev without tranny?
 
 
As I've been working on my differentials, I got to thinking about
what it would take to run my ev cj7 w/out a tranny or transfercase
(2 save weight and simplify).
 
I was thinking about running a larger dual shaft ev motor.
My specs:
4.88 axle ratio
28.5" tires
 
with these numbers, I'd be at 3742 RPM's for 65 mph.
 
I would hook up yokes directly to the motor shafts.  I would only hook
up the front driveshaft to the front yoke when I actually need 4wd, otherwise
only the output yoke would be attached.
 
I'm not planning on running lithium batteries for weight savings.  
One thing I'm trying to figure out is if I can get a strong enough ac motor.
I may go w/ a large reversable dc motor if necessary.
 
I'm trying to figure out if I ran this config, could I get out of my own way...
 
hmmm
 
-ben


      
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