Re: (ET) NEED E-15 Traction motor profile to program Sepex controller (1268)

[Ben Carter <ibekoolman yahoo com>]

 Not sure if the attachments will come through, but I have the following:
GE Elec Trak E-15 performance curve.jpg
GE Elec Trak performance curve e20pwcrv.jpg

Several years ago I added a horsepower curve for the latter diagram, 
titled:
GE Elec Trak performance curve e20pwcrv_HP added.jpg

I did this by using the If=1.9 RPM curve to calculate horsepower, which is 
what I believe the e20 production motor uses based on other GE literature. 
I suppose the other curves are with field weakening engaged? My E20 didn't 
run at all when I got it, so absolutely everything was gutted and it runs 
with no field weakening using a Curtis controller. As a result, I have no 
experience using the OEM field weakening.
I'm not sure these answer your original question, though, as I believe the 
graphs show armature amps and not field amps.
Regards,Ben
    On Saturday, December 27, 2025 at 11:20:22 AM EST, john <johnreinhard 
rochester rr com> wrote:  
 
 Update:

Chris gave me some good info & made some good points.

I am still looking for performance graphs, if anyone has them.

I searched a bit more, and discovered a post, on this group, back in 
2010, by 'Mike Wallace' - or Mike in Kentucky, who mentioned that he had 
copies of performance curves for E-15 traction/main motor from GE.

Anyone know if he is still around (on this group or others), so I could 
contact him ?

Thank You,

John


On 12/25/25 18:47, john wrote:
> Hi all,
>
> I think I asked this a couple years ago, and never got the graph or 
> charts I was hoping for.
>
> Does anyone have the field / armature profiles for the traction motors ?
>
> I am primarily testing with an E-15 motor, but E-20 or E-12 (SepEx 
> version) would be helpful.
>
> I am testing on a clone of Curtis 1268-5403 Sepex Controller, and need 
> ratio of field amps to armature amps, at minimum.
>
> If no one has the original GE motor info, maybe someone with an 
> Alltrax controller could look at the settings ? (unless they are hidden).
>
> Any help would be appreciated.
>
> Thank You,
>
> John
>
>
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