Rotor Flux Monitoring (Synchronous Machines)

Condition Based Monitoring - Rotor Magnetic Flux

Rotor flux monitoring using air gap flux probes is the most powerful means to determine if turn-to-turn shorts have occurred in the rotor winding of generators and synchronous motors. This information is critical in planning maintenance, explaining abnormal vibrations and verifying new and rewound rotor integrity.

A turn-to-turn short is the most frequent rotor insulation failure mechanism and can result in:

• Thermal imbalance of the rotor pole, leading to increased mechanical vibration
• Magnetic imbalance in the flux resulting in mechanical vibration
• Inability to reach the rated MVA for that machine
• Rotor ground insulation failure

Iris Power provides flux monitoring solutions that include a flux probe designed specifically for the air gap distance in between the rotor and stator sending data to the instrument and diagnostic software.