Mullisa, Girma (Professor)Fita, Daniel2018-07-062023-11-042018-07-062023-11-042005-01http://etd.aau.edu.et/handle/123456789/7005This master thesis deals with control of PM motor with field weakening capability for electric vehicle (EV) application .A PMSM motor model has been analyzed in a drive able to control the motor both in the constant-torque (constant flux) and in the constant-voltampere (flux weakening) regions. Today’s motor for traction in electric vehicle are most often induction motors. In recent years, PM-motors have become attractive due to their high efficiency. This is very important in battery applications. The first part of the project consists of a literature survey that aims at building knowledge on machine theory for field weakening. An analytical model for PMSM is developed there upon. An explanation of field weakening and the field orientation concepts implemented in the PMSM are presented. Finally, performance of field weakening control for PM machines with results is presented. Key words PMSM, field weakening, electric vehicleenPMSMField weakeningElectric vehicleThesis