Re: (ET) E20 motor at 48V

["Konstanty, Walter (GE Indust, ConsInd)" <Walter Konstanty ge com>]

 Steve,
  Remember, it's only rated 1.2HP......the rules of thumb are 10%
overvoltage and 25% overspeed without damage but you are in the "gray
zone".....current is the real killer.  These motors are 35 years old and
insulation life is questionable now anyways.
  In your other note, you said this is for a motorcycle
application....they are also not rated "continuous duty" (from memory)
which means they must be cooled down to near ambient temperature every
60 minutes or ....toast.   So, don't go far.  Not a good motor for a
motorcycle.

  Yes you can push them as stated in the other notes......but, not
without fear of consequence (or walking).

..Walt

-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of SteveS
Sent: Wednesday, January 02, 2008 3:37 PM
To: et
Subject: Re: (ET) E20 motor at 48V

So - I guess you're telling me these motors aren't way over-designed? 
Didn't seem like a big increase, but when you put it terms of 33% over,
then it becomes pretty clear. Do you think they could be pushed at all? 
- maybe 42 volts?

Oh and thanks for the info!

- SteveS