Re: (ET) RE: New member needs an ET

["Steve Richardson" <scr echoweb net>]

Jim and List,

The Alltrax controller maintains a relationship between the field current
and the armature current that is in the motors "sweet spot".  But we have
implemented a "Turbo" mode that can be turned on/off by the user.  It 
lowers
the field strength a little below normal when the throttle is full on and
the controller is not in current limit ( has a light load).  This allows 
the
ET to move along faster than normal.  Mine certainly goes faster.  It also
pulls the front wheels off the ground when the ramp rate is too high!

Steve

Alltrax Inc.

----- Original Message -----
From: "Jim Coate" <jbc coate org>
To: "Elec-Trak" <elec-trak cosmos phy tufts edu>
Sent: Wednesday, April 07, 2004 6:30 PM
Subject: Re: (ET) RE: New member needs an ET


> It all depends on how the controller was designed, but might get
> slightly higher top speeds. The max power would stay the same as that is
> when the armature and field are both on full. But by weakening the field
> further then the original resistors did, the top speed could go up some.
> This can't go too far before the armature current would get excessive.
>
>
> Markus Lorch wrote:
> > Will the alltrax controller provide more power due to the
> > finer control over the field? I.e. it could do variable field
> > weakening and thus optimize the relationship between the
> > internal series field and the shunt field that is connected
> > separately not sure what is implemented.
> >
>
>
> _________
> Jim Coate
> 1970's Elec-Trak
> 1992 Chevy S-10 BEV
> 1997 Chevy S-10 NGV
> http://www.eeevee.com
>
>
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