Re: (ET) E12 lost power

["RJ Kanary" <rjkanary nauticom net>]

You know this because the Elec-trak motors are not really 100% shunt
motors. They have a small series field in series with the armature. It
is this field that causes an E20 to have slightly less power in reverse,
go a bit faster in reverse, and the big reason why you *NEVER* do field
weakening in Reverse (the field is already slightly weaker due to the
series field opposing the main field because reverse on an E20 reverses
the armature and not the field like an E15)

ALMOST...................................

E 12 Models  'CA'  through  'HA'  do not possess this arrangement. Check 
the
schematic.

----- Original Message ----- 
From: "Chris Zach" <czach computer org>
To: "Richard Zachary" <Zach njcfsa org>
Cc: "Elec-trak list" <elec-trak cosmos phy tufts edu>
Sent: Sunday, June 27, 2004 1:26 PM
Subject: Re: (ET) E12 lost power