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Topic starter
22/12/2015 1:05 pm
Hey, guys. Looking for a little insight into a drive I barely have any experience with (and wish I had less).
Had one of these drives shut down on me. Found a blown RS resistor and shorted IGBT. Replaced both of those and now I get no faults when I power on, but as soon as I put in any direction (regen direction or otherwise), I get a bus overvoltage. Watched the scaled bus voltage on that one board I obviously don't know the name of and it stayed around 640. Which is quite a few hundred volts of the 1000VDC needed to trigger that fault.
Any ideas?
23/12/2015 10:51 am
What faults after the drive trips?
Topic starter
05/01/2016 10:32 am
Nothing but a drive fault. Bus overvoltage.
05/01/2016 10:57 am
check for AC ripple on 3 phase rectifier that supplies the bus.