Re: (ET) ELEC-TRAK in the UK

[Jim Coate <jbc coate org>]

Using a PM motor would allow the use of more common controllers, but as 
David said the existing sep-ex motor is going to take a lot more abuse. 
Someone was selling a souped up ET with a series-wound motor and 
matching controller - this would equal the grunt of the original motor, 
but loose the regen braking.

Meanwhile Alltrax is working on a sep-ex controller and will be 
specifically testing it on an ET (!). If you can wait a couple of 
months, I'd suggest the keeping the original motor and using this new 
controller - their other controllers are good stuff.


David Roden (Akron OH USA) wrote:
> The wound-field motors are pretty darn stout.  You'll be amazed at how strongly 
> they can pull and how durable they are.  Many or all apparenly have an internally 
> connected series field, but the dominant field is the externally connected 
> separately excited field.  I've heard that the 4QD controllers work well with these 
> motors but haven't tried one yet.
>
> Some of the E12s, and I believe all of the E8s and E10s, had PM motors.  These 
> didn't stand up well to overheating and are usually considered less desirable than 
> the GE wound-field motors.  In fact I can't think of any current PM motor that 
> would be a better choice than the wound-field for this application.  
>
> I believe they all used Peerless transaxles, but I don't know what model or models.  
> Someone else here probably does.

Christopher GODDARD wrote:
> I would like to update the motor
>     to a modern highefficincy permant magnet motor and PWM controller
>     but how much power can the transmission take?


_________
Jim Coate
1992 Chevy S10
1970's Elec-Trak
http://www.eeevee.com