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| dc.contributor.author | Ayalnesh, Abebaye | |
| dc.date.accessioned | 2021-09-29T12:19:30Z | |
| dc.date.available | 2021-09-29T12:19:30Z | |
| dc.date.issued | 2021-06 | |
| dc.identifier.uri | http://ir.bdu.edu.et/handle/123456789/12671 | |
| dc.description.abstract | Transportation in the world especially in cities and towns is the main issue. Most of the time transport is by using vehicles which use petroleum as a means of power source and with combustion engines as a drive system which result in depletion of fuel source and air pollution. Using electric energy for electric vehicle (EV) as power source uses electric machines. In traditional electric machine applications a three-phase stator winding is selected, since the three-phase supply is readily available. Now a days due to increase of power demand, the three phase machines face challenges. These challenges are low rating, low efficiency and low in fault tolerant ability, complication in speed control, high torque pulsation and harmonics problems. In order to tackle these problems design of multi-phase machines is one solution. In this thesis design, model and analyze 12-phase induction machine proposed for electric vehicle application which is one of the multiphase machine systems is considered. To complete this work, the methodology used is vector space decomposition (VSD) modeling approach which is based on symmetrical components theory. Machine variables are decomposed by VSD matrix resulting in multiple decoupled two-dimensional subspaces and zero-sequence component(s). The first subspace is a flux/torque producing one, meaning that whole electromechanical energy conversion is happening here. Having the decoupled machine, it is easy to implement any vector control strategy. After completing the work the result obtained is increased number of degree of freedom, decrease in total harmonic distortion (1.429% for three phase and 1.309% for twelve phase, power density (10.48/ms for three phase and 25.763% for twelve phase. when one phase is open, it operates with 1/3 of the rated power. At last proper controlling model by using MAT LAB Simulink block diagram for PI, fuzzy logic and hybrid speed controller is developed. To increase the reliability of the controller hybrid PI-fuzzy logic controller is used and good result is obtained from independent controller. | en_US |
| dc.language.iso | en_US | en_US |
| dc.subject | ELECTRICAL AND COMPUTER ENGINEERING | en_US |
| dc.title | MODELING AND ANALYSIS OF TWELVE- PHASE INDUCTION MACHINE FOR ELECTRIC VEHICLE APPLICATIONS | en_US |
| dc.type | Thesis | en_US |
