A Negative Sequence Component Fusion Method and Its Applications in Diagnosis of Inter-turn Short Circuit Faults in Induction Motor Stator Windings
Lichen Gu · Proceedings of the CSEE · 2013
In order to detect stator winding inter-turn short circuit faults of AC motors,voltage and current negative components were synthesized into Lissajous figures by Lissajous method based on the multi-information fusion theory.Functional relationships between graphic features and fault features were deduced by mathematical analysis.Dynamic changing regularities of graphic features which can reflect the fault of motors were analyzed by way of simulations and fault motor experiments.Then the robustness and accuracy of the negative Lissajous figure angle being as the fault feature component was demonstrated.Finally a figure recognition method for fault diagnosis was formed.The method in this paper can provide new thinking and method for fault diagnosis of motors and driving systems.