International Journal of Electrical and Computer Engineering (IJECE) Vol. 6, No. 5, October 2016, pp. 1994~2004 ISSN: 2088-8708, DOI: 10.11591/ijece.v6i5.10879  1994 Journal homepage: http://iaesjournal.com/online/index.php/IJECE Five-Phase Permanent Magnetic Synchronous Motor Fed by Fault Tolerant Five Phase Voltage Source Inverter Hichem Kesraoui 1 , Hamdi Echeikh 1 , Atif Iqbal 2 , Med Faouzi Mimouni 1 1 National Engineering School of Monastir Tunisia 2 Electrical Engineering Department, Qatar University, Doha Qatar Article Info ABSTRACT Article history: Received Apr 15, 2016 Revised Jun 29, 2016 Accepted Jul 15, 2016 Multiphase machines have gained attention in numerous fields of pplications such as Aircraft, ship propulsion, petrochemical and automobiles, where high reliability is required. The additional number of phases guarantees that the system continues to operate in faulty conditions compared to the traditional three-phase machine due to the high degree of freedom. Among faults able to affect multiphase system, break between a machine phase and the voltage source inverter (VSI) degrade the performance of the control. In this paper, a five-phase permanent magnet synchronous machine (PMSM) is fed through a fault tolerant voltage source inverter with new structure to ensure drive continuity when open circuit occurs. The five phase PMSM is controlled with fuzzy logic regulator to minimize disturbance impact that can arise fault condition. Paper is accomplished with real time simulations using MATLAB-Simulink in order to validate the new topology and show the effectiveness of the proposed solution. Keyword: Five-Phase Permanent Magnetic Motor Fuzzy Logic Vector Controller Voltage Source Inverter Copyright © 2016 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Kesraoui Hichem, Electrical Engineering Department, National Engineering School of Monastir Tunisia, Ibn Eljazzar Street, 5000, Monastir, Tunisia. Email: kesraouihichem@gmail.com 1. INTRODUCTION Certain applications like electric vehicles, wind or marine current turbines and ships propulsion, require a high reliability of on-board equipment. The electrical machine is the heart of these applications and it is sometimes highly desirable even essential to keep its operation even under severe conditions where a failure emerges and the intervention becomes risky or too expensive. A certain number of these applications then betted on the training system by supporting the multiphase machine where number of phases is higher than three, it offers a certain number of additional freedom degrees compared to the classical three-phase machines [1]. These freedom degrees can be exploited to improve the torque density [2] or to control several machines serial or parallel connected [3] or to maintain a certain operation during the fault conditions. A defect on an inverter’s or in its connection with the corresponding multiphase machine winding generally leads to degradation by rupture of a stator phase. It is the most common fault in machine-converter association [4], this causes the annulation of the current in the corresponding phase and thus the appearance of a torque ripple. The development of control which maintains a constant torque is more than necessary. In the literature many research works addressed to fault conditions such as in [5] a predictive control scheme is modified to allow post fault operation of a five-phase drive when one phase is open. In [6], new currents are imposed to minimize joule's losses in remaining phases and avoid torque ripple when one phase goes in open-circuit, when the control scheme is validated by simulating an actuation system with a five-phase segment motor.