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Abstract
Abstract—In this article, a comprehensive method is introduced to redress eccentricity fault consequences. Two main effects of eccentricity faults include considerable increase in unbalanced magnetic force and torque ripple. Dependency of unbalanced magnetic force and torque ripple on eccentricity fault level is shown, and the possibility of compensating them via controlling currents in facing poles is proved. These objectives are accomplished through a novel converter that controls currents in poles of every phase such that one pole is responsible for nullifying unbalanced magnetic force and the facing pole is in charge of torque ripple reducing. The control algorithm is analyzed in details and through finite-element method and MATLAB/Simulink (The MathWorks, Natick, Massachusetts, USA) is implemented on a 6/4 switched reluctance motor with 30% eccentricity fault level. The proposed strategy samples the flux leakage as the index both for occurrence and criterion for compensation of unbalanced magnetic force. The suggested method is designed such that there is no need to detect eccentricity fault direction, location, and type, which makes it cost effective and practical for a wide range of switched reluctance motors and applications.
Additional information
Notes on contributors
Mohammad Reza Tavakoli
Mohammad Reza Tavakoli received his B.S. from Iran University of Science and Technology in 2011 and his M.S. from Shahid Beheshti University in 2014, both in electrical engineering, Tehran, Iran. Since 2011, he has been a research assistant in the Power Electronics, Motor Drives, and Electric Machines Research Center, Electrical Engineering Department, Shahid Beheshti University, Tehran, Iran. He has been an IEEE student member since 2012, and his current research interests include power electronic interfaces for renewable energy resources, hybrid electric vehicles, modeling and control of electrical machines, and fault diagnosis and compensation in electric machineries.
Hossein Torkaman
Hossein Torkaman is currently an assistant professor in the Department of Electrical and Computer Engineering at Shahid Beheshti University, Tehran, Iran. He has been an IEEE member since 2010, and his current research interests include power electronic, numerical methods, design and modeling of electrical machines and drives, and smart grids.
Farzad Faradjizadeh
Farzad Faradjizadeh received his B.S. and M.S. in electrical engineering from Islamic Azad University, Tehran, Iran, in 2009 and 2014, respectively. Since 2012, he has been a research assistant in the Power Electronics, Motor Drives, and Electric Machines Research Center, Electrical Engineering Department, Shahid Beheshti University, Tehran, Iran. He has been an IEEE student member since 2013, and his research interests are power electronics, electrical machinery, power system dynamics, and renewable energies.
Ebrahim Afjei
Ebrahim Afjei received his B.S. in electrical engineering from the University of Texas, Austin, in 1984; his M.S. in electrical engineering from the University of Texas at El Paso, in 1986; and his Ph.D. from New Mexico State University, Las Cruces, in 1991. He is currently a full professor and dean of the Department of Electrical and Computer Engineering, Shahid Beheshti University, Tehran, Iran. His current research interests include electrical machines, numerical methods, and electromagnetic theory.