International Journal of Power Electronics and Drive System (IJPEDS) Vol. 8, No. 3, September 2017, pp. 1128~1138 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v8i3.pp1128-1138  1128 Journal homepage: http://iaesjournal.com/online/index.php/IJPEDS Performance Analysis of Indirect Rotor Field Orientation Five Phase Induction Motor Using Eight Switch Inverter Mahmoud M. Elkholy 1 , Zakaria M. S. Elbarbary 2 1 Electrical Power and Machines Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt 2 Department of Electrical Engineering, Faculty of Engineering, Kafrelsheikh University, Egypt Electrical Engineering Department, Faculty of Engineering, King Khalid University, Abha, Saudi Arabia Article Info ABSTRACT Article history: Received Mar 17, 2017 Revised Jul 22, 2017 Accepted Aug 3, 2017 This paper proposes new topology of five-phase inverter with reduced number of switches fed indirect rotor field oriented five phase induction motor. It employs only eight IGBT switches preformed five phase inverter. The reduction of the number of power switches from ten to eight improves the cost-effectiveness, volume-compactness and reliability of five-phase induction motor drive system. Simulation model of the proposed drive system is developed using the Matlab/Simulink package and analyzed to verify the effectiveness at different operating conditions of this approach. The comparison between the performance of the five phase motor under classical ten switch inverter and new topology at the same operation conditions has been illustrated. The proposed system gives similar operations as classical ten switch inverter for a certain range of motor speed and load torque. The DC voltage of proposed inverter must be compensated to higher value to achieve same performance of classical ten switch inverter in all range of motor speed and load torque. Keyword: Eight-switch inverter Field oriented control Five phase induction moto Ten-switch inverter Copyright © 2017 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Mahmoud M. Elkholy, Electrical Power and Machines Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt, P.O.Box 44519 Zagazig, Al Bahr Street, Zagazig, Egypt. Email: melkholy71@yahoo.com 1. INTRODUCTION Multiphase drives have several advantages over conventional three-phase drives such as: reducing motor phase current without increasing the phase voltage, increasing the frequency and reducing the amplitude of torque pulsations, increasing the torque / RMS ampere for the same machine volume [1]-[2]. With the advancement in power electronics, interest in multi-phase machine has been increased tremendously as high power electronic devices are used as a switch in voltage source inverter (VSI). To increase power system level, two approaches are used; the first one is the use of multilevel inverters supplying three-phase machines [3]-[4]. The second approach is multi-leg inverters fed multiphase machines [5]-[6]. It is noted that the similarity between two approaches ,in multilevel inverter the additional switching devices increase the number of voltage levels, while in the multi leg inverter, the additional number of switching devices increases the number of phases. The performance under faulty conditions in voltage source inverter or in motor windings is one of advantages of multi phase motor [7]-[10]. Two techniques are used in five phase inverter, one, is the carrier based pulse width modulation (PWM) and the other is the space vector modulation (SVM) [11]-[14]. This paper study a new inverter topology to fed indirect rotor field oriented five phase induction motor drive system. This inverter topology consists of eight switches instead of ten switches, two switches used for every phase and the fifth phase connected to the midpoint of dc-link capacitor. This topology of the