Re: (ET) motor on E12S...

["Steve Richardson" <scr echoweb net>]

Hello Dave & Debbie again,

If you have a separately excited field type motor the most dangerous thing
that can happen to it is loosing the field current.  Loss of field current
causes the motor to stop turning and the armature will burn up within a 
very
short period of time, seconds if the controls can feed the current the
armature will demand.  Most sep-ex controllers monitor the current of the
field and the armature and have current limits that are designed into to
controller that limits the current applied to either.

The Alltrax controller maintains a constant vigil to insure that the
currrents are held within the range specified for the motor.  The relay
controller in my E-15 has tried many times to burn mine up when a relay
stuck !
I'll have a Alltrax controller in my E-15 this week end or early next week
and I'll report to the list how it works.

It's fantastic in the golf cars !  Slamming it into reverse at full speed 
is
a joy to experience.  Turning off the key at full speed produces a gentle
Regen braking with the key off.
Reverse is automatically applied at half speed.  Smoooooooth is the only 
way
to describe it !

Thanks

Steve
Alltrax Inc.
541-476-3565
----- Original Message -----
From: "Dave & Debbie Barden" <daveb seanet com>
To: <rjkanary nauticom net>; <ssawtelle fcc net>;
<elec-trak cosmos phy tufts edu>
Sent: Tuesday, February 10, 2004 7:18 AM
Subject: Re: (ET) motor on E12S...


> not being too electronically literate I need some help getting from A to
C, A
> being my motor has a shunt which supplies the field.  To get to C I have
to be
> sure that the sep-X controller will work with that kind of field.  One of
> Richardson's emails talked about their needing to modify the controller 
> to
work
> with small current of the E15's field windings 3 amps instead of 30 I
think he
> said.  Judging from the small wires going to the field of the E12S motor
and
> the fact that it uses a shunt I would guess that the current would be
pretty
> low as well???  And if steve is correct that the E12S uses an E15 like
motor it
> should work.  What I am really worried about is what will happen if my
field
> loses current (blown fuse or fried relay) will the armature still be
getting
> current from the controller???
>
> thanks,
> dave
>
>
> >     The only wound field traction motor that does not possess the extra
> > winding is the one used in the E-12 CA through HA models . This 
> > category
> > includes the E-12 M.
> >
> >        Note that in the Homeowner's Service Manual, the E-12 S  
> > armature
> > terminals are identified as A1 and S2, indicating the presence of a
'shunt'
> > winding.
> >
> > ----- Original Message -----
> > From: "steves" <ssawtelle fcc net>
> > To: <elec-trak cosmos phy tufts edu>
> > Sent: Tuesday, February 10, 2004 5:07 PM
> > Subject: Re: (ET) motor on E12S...
> >
> >
> > > As I understand it - The E12S is basically an E12 with an E15 motor.
The
> > > wiring is different than an E12.  I would think, based on this, it
would
> > > work.  Someone correct if I'm wrong...
> > >
> > > - SteveS
> > >
> > > ----- Original Message -----
> > > From: "Dave & Debbie Barden" <daveb seanet com>
> > > To: <plitch attglobal net>; <thumphrey mynra com>; <>
> > > Sent: Tuesday, February 10, 2004 8:38 AM
> > > Subject: (ET) motor on E12S...
> > >
> > >
> > > > I would really like to get the new Alltrax controller for my E12S.
But
> > > the
> > > > discussions on this list have all centered around the E15 and E20.
My
> > > ultimte
> > > > question is will the alltrax work with the E12S  motor?  Also what
does
> > > the S
> > > > in E12S signify?  I thought I read that the E12S is a "compound"
motor
> > > > aka "shunt motor" right/wrong???
> > > >
> > > > Bottom line, will the sep-X controller work on an E12S?   
> > > > thoughts??
> > > >
> > > > thanks,
> > > > dave
> > > >
> > > >
> > > > _______________________________________________
> > > > Elec-trak mailing list
> > > > Elec-trak cosmos phy tufts edu
> > > > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> > > >
> > > >
> > >
> > >
> > >
> > > _______________________________________________
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> > > Elec-trak cosmos phy tufts edu
> > > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> > >
> >
> >
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> > Elec-trak cosmos phy tufts edu
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> >
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>
>
>
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