Detection of Broken Rotor Bar in Squirrel-Cage Induction Machines Using Stator Zero-Components

Abstract

In this paper a method for the broken rotor bar fault detection of induction squirrel cage machines is presented. This method is based on measurements and frequency analysis of the sum of the stator phase currents (the stator circular current) for delta connected windings. For the case of the star connected windings the stator neutral point voltage is measured and analyzed. A model of squirrel cage induction machine, which takes into account the stator windings and rotor cage layout, is used for theoretical investigations of the proposed method. Based on the theoretical investigations it has been found out that the spectrum of the stator circular current, and also the neutral point voltage, contains the rotor fault-related interharmonics. At the same time, these interharmonics are the largest components in the frequency spectrum. The proposed method has been experimentally verified and compared with the procedure based on the frequency analysis of the line current.

Goran Petrović

Full Professor | Department of Electrical Measurements

Prof. dr. sc. Goran Petrović is a full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Architecture in Split. His research interests include measurement of electrical and process quantities, analysis of geoelectrical and geothermal features of the soil, instrumentation for smart grids, measurement and application of synchrophasors. He is the author of numerous papers published in top-tier scientific journals and contributed to valuable international and national scientific projects.

Marin Despalatović

Full Professor | Department of Electrical Drives and Industrial Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split, where he teaches courses Electric Machines, Electric Drive Systems, and Electromechanical System Modeling. His research focuses on power systems, energy storage, and smart grid technologies, with active participation in multiple national and international projects aimed at advancing energy infrastructure and improving system stability.