This master thesis deals with control of PM motor with field weakening capability forrnelectric vehicle (EV) application .A PMSM motor model has been analyzed in a drive ablernto control the motor both in the constant-torque (constant flux) and in the constant-voltamperern(flux weakening) regions.rnToday’s motor for traction in electric vehicle are most often induction motors. In recentrnyears, PM-motors have become attractive due to their high efficiency. This is veryrnimportant in battery applications.rnThe first part of the project consists of a literature survey that aims at building knowledgernon machine theory for field weakening. An analytical model for PMSM is developed therernupon.rnAn explanation of field weakening and the field orientation concepts implemented in thernPMSM are presented. Finally, performance of field weakening control for PM machinesrnwith results is presented.rnKey wordsrnPMSM, field weakening, electric vehicle