Hi,
We have a DC motor (150HP) on a dc drive that provided braking when the motor is stopped. The braking is via braking resister and the electronic drive.
We at times, unfortunately will open the drive power supply disconnect while the motor is still coming to a stop. This results in a "fire...
Hello,
Thanks all for the many excellent replies.
I am digesting the info and agree the problem is somewhere in the motor stands (steel) causing loading affects that are damaging the bearings prematurely.
I am also looking at the way we start up the two motors that are supposed to work together...
Looks like you can only post one pic at a time. The one in previous post is the upper motor. I'll add the lower motor next, then a lower view of the upper motor framework.
thxhttp://files.engineering.com/getfile.aspx?folder=139e71ba-3953-4c1c-afcb-9c2e0083e333&file=Jumbo_Motor_Base_Pics_001.jpg
Hello,
Thanks again for the many replies. Someone asked for pics of the installation. I think I was successful in uploading 3 pics. One shows the lower motor on a 3.5 ft or so tall stand. The other two show the higher motor frame. One pic shows the frame, the other shows the motor on top- motor...
Hi,
Thanks for all the replies. Your comments are in the same general area as mine have been. Now I need to try to prove out the root cause.
Here's some more info to answer some of the questions in your replies.
-The motor is connected to a gear box by a dodge coupling, its a boot style size...
Hi,
Looking for any specific application info or general thoughts. This is a long standing problem. We had a Reliance 300 HP DC motor driving a "jumbo" roll on a paper machine. The motors would fail every 2-6 months. Failure was non driven end bearing housing would work itelf loose, then motor...
