Comparison of stator current, axial leakage flux and instantaneous power to detect broken rotor bar faults in induction machines

This paper shows the practical demonstration of different factors that make it possible to overcome any shortcoming concerning the detection of broken rotor bar fault in the machines using the fault frequency components from the current, flux and instantaneous power signals under different levels of loading. Unlike previous studies that generally used single sensor type to detect broken rotor bar fault using current sensor at full-load conditions, or limited number of load cases, this research examines the use of multiple type sensors i.e. current, voltage, axial flux and instantaneous power to detect the broken rotor bar fault using standard fault frequencies. This paper also shows the importance to examine the variability in their amplitudes to other effects apart from load and fault severity.