I am seeing what I beleive to be a trend of bearing failures due to elec. arcing in some of our VFD driven motors. Does anyone have a link to some related articles so I could present a report to management to upgrade brg' types during rebuild?
Do a web search for electrical discharge machining. Check Siemans website, also seems like I read something on Reliance's website. EDM is probably going to get you plenty of info.
Regards
Roy Gariepy
Maintenance and Reliability Dept.
Dorlastan Fibers LLC.
Goose Creek, South Carolina USA
See Thread237-102205, Thread237-18455, Thread237-30937 in this forum. There are hundreds of other related threads brought up by a search of "motor shaft current" or "shaft grounding".
You can also search for the tech article "The Effects of PWM Voltage Source Inverters on the Mechanical Performance of Rolling Bearings" by Busse, Erdman, Kerkman, Schlegel and Skibinski. I found it to be very interesting.
Regards,
Roy Gariepy
Maintenance and Reliability Dept.
Dorlastan Fibers LLC.
Goose Creek, South Carolina USA