Modelling of airgap eccentricity in induction motor

Abstract

The thesis Models Air Gap Eccentricity of Induction Motor under simple eccentricity profiles viz. Elliptical, Sinusoidal and Stepped profiles. First of all a model of Induction Motor is developed under transient state and then a Thevenin Equivalent Circuit is developed from Steady State Circuit Articulated by IEEE using simple Circuit Analysis technique and then Induction Motor model is developed under Steady state at No Load condition. For Induction Motor development all the equations are derived using DQ transformation from the scratch and their Torque and Rotor Angular speed are plotted. Afterwards of Induction Motor model development, simple eccentricity profiles are studied. Their basic code is written by applying eccentricity at rotor side and plotting stator and rotor current difference for the sake of profile understanding. Then these models are deployed in the dynamic model of Induction Motor and the variance in parameters are observed with variance of eccentricity profile. The order magnitude of Eccentricity profiles are adjusted to get relevant results. All the coding and plotting is done in MATLAB2023a environment. Whenever acronyms are used they are specified also plots are given figure number in proper sequence in relevant place.