Mamo, Mengesha (PhD)Tilahune, Mesfin2018-06-292023-11-282018-06-292023-11-282015-03http://etd.aau.edu.et/handle/12345678/4779Multi-phase machine and drives is a topic of growing relevance in recent years, and it presents many challenging issues that still need further research. Numerous industrial applications, such as textile industry, paper mills, robotics and railway traction, require multi-phase electric drive. This Thesis work discussed a comprehensive simulation model of a five-phase induction motor drive system. Both open loop and closed-loop control is elaborated. Also, discussed the advantages of a drive system and identified its potential application areas. Modeling of a five-phase voltage source inverter was illustrated for step mode of operation and SVPWM mode of operation. This was followed by the phase variable model of a five-phase induction motor. The model was then transformed into two orthogonal planes, namely d-q, x-y and the torque equation is obtained. The scalar control principle was then presented for the five-phase induction motor drive system. The difference between the scalar control principle applied to a three-phase system and a five-phase system is highlighted. Finally, the complete component modeling is developed using „simpower system‟ blocksets of Matlab/Simulink. To address the real time implementation issues, dead banding of the inverter switches are also incorporated in the simulation model. (Key words: Ten-step mode, SVPWM, V/F speed control, phase variable model, PI controller, x-y plane, d-q plane, Clark transformation, Park transformation)enTen-step mode;SVPWM; V/F speed control; phase variable model; PI controller; x-y plane;d-q plane; Clark transformation; Park transformation)Thesis