[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

Same speed would make perfect sense if the armature and the field were both run at the same voltage on a shunt motor. You will just have 25% more power (which could get into "break things" territory if not limited) or 25% less current draw on the wires for the same given power.
Actually if you limited the current to 75% of what a normal E15 pulls you would get lower voltage drops across the unit. That could be cool, but it would overspeed the snowblower unless you use a second controller for that.
Side note, I've been running my lift motor at 36 volts for a decade now. Works fine, goes up and down quickly (series motor) and with a 10 amp fuse I don't have to worry about ripping out the deck's lift point. (Note, running at 36 volts will fuze the internal current disconnect shut. Sucks, but you can let the deck fuse serve that function. Just... don't use a 30a fuse). The motor puling only 1/3 of the amps really makes a difference in lack of voltage drop in the wires. 


On 12/27/25 21:13, David Roden wrote:

I think it depends on how much you want to optimize things.  Bear in mind
that the later ET PM motors didn't (couldn't) have field weakening.

If memory serves, and it might not as it's been many years, Mark Hanson ran
an E15 with full field and 48 volts from his own homebrew PWM armature
controller.  I think he got about the same top speed as on 36 volts with
the factory field weakening.  He had a second controller to drop the 48
volts to 36 volts for the attachments.  If he's still on the list, maybe
he'll chime in with comments and corrections.


David Roden - 25 Years with ETs

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
Note: mail sent to the "etpost" address will not reach me.  To send
me a private message, please use the address shown at the bottom
of this page : http://www.evdl.org/help/
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =




_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak