Reflected Wave and Understanding Motor Lead Length Restrictions

[@qzorn4440]

Geee we use lots and lots of rockwell motor stuff and their own service techs seem to be clueless about this subject? no wonder we have a lot of motor/drive failures...? great video thanks

[@cliffmcleroy8168]

We have a system with Kinetix 5700 drives and 4 servo motors. We've had 7 motors fail with shorted windings in the last year. We are going to connect an Oscope to try and determine the problem. We're using 40 meter 20290 cables.

[@e-maqcomponenteseletricos]

Hello my friend! Have you determined if this phenomenon is the cause of your 7 motor fails?

[@cliffmcleroy8168]

@@e-maqcomponenteseletricos These were Elwood SX motors. We did find a lot of reflected wave at the motors so we put a line reactor at the drive output on the most troublesome motor. Eventually the customer put line reactors on the other 3 and shortened the cables by 3-4 meters. Honestly I the Elwood had a bad batch of winding wire.