RE: (ET) motor voltage [Virus checked]

["Elie, Larry (L.D.)" <lelie ford com>]

You want a coil that has the same number of amp-turns.  The resistance has 
to be 1/2 what it was 
before.  The coil will typically be with a gauge about 3/4 of the original 
in dia, and twice the 
number of turns.  A table of resistance of magnet wire can be found at 
www.mwswire.com  If you 
were a bit brave, you COULD do a pwm control of the lift itself (way 
overkill but way cool) and use 
about a 50% duty cycle off the full 36-42V input, and use the original 
motor itself.  

Having said all that (and I know how to do all that), I have NEVER 
BOTHERED even though I probably 
have the WORST CASE with my tiller and disc; it's not hard to just charge 
a bit extra.

Larry Elie


-----Original Message-----
From: Dave Reuter [mailto:david reuter iavinc com]
Sent: Friday, May 16, 2003 10:15 AM
To: Neil Dennis
Cc: Elec-trak
Subject: Re: (ET) motor voltage [Virus checked]



Neil,

That true, The motor chassis might not been able to handle additional heat.
Now that I think about it the application I am looking at is variable speed
so I will be regulating the current. Also the applications that I have done
this to in the pass were also all regulated with a PWM control. I hadn't
thought about the application being unregulated.  My mind these days is so
geared to traction drives right now I guess I over looked it.

Dave Reuter




                                                                           
                                                         
                      Neil Dennis                                          
                                                         
                      <wombat dssinternet net>         To:       Elec-trak 
<elec-trak cosmos phy tufts edu>                         
                      Sent by:                         cc:                 
                                                         
                      owner-elec-trak cosmos ph        Subject:  (ET) 
motor voltage                                                 
                      y.tufts.edu                                          
                                                         
                                                                           
                                                         
                                                                           
                                                         
                      05/16/2003 09:47 AM                                  
                                                         
                                                                           
                                                         
                                                                           
                                                         




Dave, how do you think I burnt out the lift motor  ?  Ran it on either
24 or 36 ( I think 24 volts).  That's why I'm thinking smaller gauge
wire to increase resistance of winding and limit current.

wombat