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Old August 23rd, 2022, 05:35 AM   #1
lmackey91
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lmackey91 is offline
 
Join Date: Aug 2022
Location: Dallas, OR
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Powerflex 525 dies every 18-24 months

First time here
I have a cabinet with a PowerFlex 525 that starts and stops about 60-80 times per minute, it is one of 10 in the cabinet and the only one that has needed replaced in the 8 years I have worked on it.

The problem is when it gets the signal to start, it does nothing for about 5-10 seconds and then return to normal for a while, it will do this about 2-3 times a day at first and after about another month of dealing with, it will get as bad as once every 5-10 minutes and once I replace it everything is good for another year or so.

It's a 3 Phase PowerFlex 525 2HP, Ramp to stop:0.1s, external brake on motor, no resistor brake, start source ethernet, no fault codes.

Tried swapping the start source to the terminal block with no success, old drive will bench test for hours without fail.

Just wondering if anyone has had a similar application and problem and has seen one of these drives slowly die like this.

I don't know enough technical details of these drives as far as stopping/braking, could it be stopping too fast and getting power fed back into the drive and stressing/damaging the internals, I've thought about either installing a resistor brake or maybe switching it to coast to stop so the mechanical brake does the stopping power.

I just replace the drive 3 hours ago for the 4th time and haven't had any issues since. just like every time I've changed it before.
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