|
Hello Bob,
The skinny is;
The Alltrax controller does not reverse the Armature for
reverse, it reverses the Field. It also monitors the current of the
armature and the field to maintain the proper relationship between the
two. It uses "Field Maps" in the software to match the controller to the
motor requirements.
We have started full production of these controllers as of
this week and will start shipping next week >
Thanks
Steve
----- Original Message -----
Sent: Thursday, February 12, 2004 7:17
AM
Subject: Re: (ET) motor on E12S...
Just a clarification: The Alltrax controller may actually
reverse the armature current to reverse, which would be fine, you'd just
always leave the field energized in the forward polarity.
>>>
Dave & Debbie Barden <daveb seanet com> 2/12/2004 7:10:31 AM
>>>
Thanks. It is looking more and more like the Alltrac
controller will work with
the E12S motor. The E12 does use field
switching and my machine continues to
suffer welded contacts and blown
fuses whenever the motor is stopped to change
directions and the field
collapses sending a surge of current back up the line,
thus my concern
with the field losing current. However I understand from Steve
Richardson that their controller does monitor have over current
protection. I
am verifying also with him that the controller will
switch the field for
forward reverse.
thanks again for all
your responses and increasing my understanding of
motors.
dave
seattle
>
The field current requirements for the motors in question is for all
>
intents and purposes identical. In all the twenty some years that I
have
> operated either the late model I-5 , or the earlier model
eight speed E-20,
> I have yet to encounter a situation where field
voltage was lost.
> Since I do not have
any information on the solid state controller you
> are planning on
utilizing, I can't offer an opinion on whether or not it
> offers
armature overcurrent protection.
> I do
feel that the chances of a loss of field incident are slight. Few
>
people ask their tractors to do what I ask of mine. If anyone should have
a
> meltdown, it should be me.
> If your tractor
uses field switching for reversing, instead of armature
> reversing, I
would recommend changing it over. It's not that bad of a job,
>
especially if you have the Manual, and an organ donor tractor.
>
> ----- 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 10:18 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
>
> > > >
> > > > >
> > > >
>
> > >
> > > >
> > > >
_______________________________________________
> > > >
Elec-trak mailing list
> > > >
Elec-trak cosmos phy tufts edu
> > > > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
>
> > >
> > >
> > >
> > >
_______________________________________________
> > > Elec-trak
mailing list
> > > Elec-trak cosmos phy tufts edu
> >
> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
>
> >
> >
> >
> >
> >
>
>
>
>
_______________________________________________
Elec-trak
mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
_______________________________________________
Elec-trak mailing
list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
|