End-Winding Leakage Flux Monitoring for Stator Fault Detection in Induction Machines using Fiber Bragg Grating (FBG)-Terfenol-D Composite Sensors

This study presents an approach for detecting stator faults in induction machines using Fiber Bragg Grating (FBG) composite Terfenol-D sensors. The proposed sensor utilises the magnetostriction effect to monitor magnetic flux density and detect stator electrical unbalance conditions through leakage flux spectrum analysis. Experimental results demonstrate the sensor's ability to detect frequency spectrum changes related to stator faults. The findings highlight the ability of the FBG-Terfenol-D composite sensor for in-situ leakage flux measurements and its potential for monitoring induction machine health under various load conditions.