Procedure for Detection of Stator Inter-Turn Short Circuit in AC Machines Measuring the External Magnetic Field

This paper presents a non-invasive procedure to detect inter-turn short circuit faults in the stator windings of AC electrical machines. It proposes use stray external magnetic field measured vicinity machine determine faults. The originality introduced by this is analysis method presented paper, which when compared usual diagnosis methods, does not require any data on healthy state machine. uses unbalance created rotor poles and load variation faulty cases. can be applied induction synchronous machines used as motor or generator. based sensitive spectral lines obtained from changes. Analytical relationships are developed justify proposed explain physical phenomenon. To illustrate these theoretical considerations, practical experiments also presented.