Emulation of an Induction Machine with Inclined Eccentricity fault

Rising recognition of the financial risks posed by sudden failures in electric machines, particularly those operating under critical conditions, underscores the need for advanced fault diagnosis. Among the various mechanical faults, eccentricity faults, especially inclined or axially non-uniform static eccentricity, remain less explored in the literature despite their practical relevance. This paper develops a mathematical model based on the modified winding function method (MWFM) for a wound rotor induction motor to address this gap. Furthermore, it explores the application of power hardware-in-the-loop (PHIL) based emulation techniques to accelerate the testing of these eccentricity faults. Experimental data validate the mathematical model and underscore the efficacy of the PHIL-based machine emulator in emulating different degrees of eccentricity fault conditions. Additionally, the study contrasts the impacts of axially uniform and non-uniform static eccentricity, providing valuable insights into the detection of these faults.