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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 |