What is a reasonable life expectancy and how do you optimize it. Part 2 of a 3 part series on motor life expectancy Many motors fail prematurely due to misapplication and this series will discuss ways to avoid these and optimize motor life. This avoids costly downtime an the expense of repair or replacement. Failure […]
Solutions at the Drive and Motor cables Part 2 of 2 part series on Motor Bearing Current Failures As discussed in part 1, increasingly motors are operated on variable frequency drives. This often results in premature bearing failure due to bearing currents. These currents passing through the bearings can lead to damage in the form […]
Part 1 of a 2 Part Series on Motor Bearing Current Failures More and more motors these days are being controlled by variable frequency drives. Often, the drives result in premature bearing failure due to stray currents. These currents result from the common mode voltage produced by the drive. As seen in the figure above, […]
Part 3 of a 3 Part Series on Lubrication Issues A key aspect of plant maintenance is utilizing proper techniques for there-lubricating of bearings. This ensures a uniform distribution of lubricant and prevents adding too much grease or introduction of dirt and other contaminants. These can all result in a significant reduction in bearing life. Bearing Lubrication […]
Two of the most common problems that we deal with regarding belt drives are shaft breakage at the drive end bearing and failure of a motor drive end bearing. These failures are often the result v-belt over tensioning. Proper belt tensioning is critical to long bearing life as well as long belt and sheave life. Poorly […]
In today’s energy conscious world more and more motors are being operated with variable frequency drives. Drives provide large energy savings, reduced inrush current and precise speed control. However, VFDs do have their drawbacks. Chief among these drawbacks is electrical bearing damage caused by stray shaft currents. This damage manifests itself in the form of […]
