Rotor Winding Monitoring – INDUCTION MOTORS

The most common causes of induction motor failures are due to breaks in rotor bars or shorted circuit rings due to rotor eccentricity. Current Signature Analysis (CSA) is used to accurately measure faults in the induction motor rotors through changes in the rotor magnetic field.

Current Signature Analysis is important in tool in preventing:

Broken bars that cause rotor core damage due to temperature increases and arcing.
Premature degradation of bearings due to torque and speed oscillations on the rotor.
Stator failure when broken rotor bars can lift out of the rotor slot due to centrifugal forces.
Rotor eccentricity issues due to unbalanced magnetic forces

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