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In many respects, large motors and generators in petrochemical plants have become a commodity product with intense competition amongst manufacturers from around the world to secure orders. This has resulted in pressure on machine designers to reduce manufacturing costs. Some of the methods employed to accomplish this include: • Reducing the conductor(More)
Flux monitoring via air gap flux probes is a proven technology used for many years in synchronous machines to determine the presence of turn-to-turn shorts in a rotor winding. This information is critical in planning maintenance outages and augmenting online vibration analysis. Traditionally, flux measurements are done using flux probes installed on a(More)
In many respects, Large Motors and generators in petrochemical plants have become a commodity product with intense competition to secure orders among manufacturers from around the world. This has resulted in pressure on machine designers to reduce manufacturing costs. Many design and processing innovations have been successfully implemented. However, there(More)
The rotor windings of synchronous motors and generators are usually very reliable. However, the turn insulation in such machines will eventually degrade and puncture due to thermal aging, load cycling and/or contamination. Although turn shorts do not directly lead to machine failure, they can lead to high bearing vibration, may damage synchronizing systems(More)
Gradual aging of the turn insulation in salient pole rotor windings can eventually lead to shorted turns. These shorted turns may create the high vibration of the rotor, and, in severe cases where there are few poles and a number of shorted turns, the probability of a motor shutdown due to high vibration increases. The most widely applied method for(More)
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