Abstract: The Direct Torque Control (DTC) theory has achieved great success in the control of induction motor. Many attempts have been made to implement the idea of DTC of induction motor to permanent magnet synchronous machine since 1990ís. The advantages of DTC of permanent magnet synchronous machine drives include less machine parameter dependence, simpler implementation and quicker dynamic torque response. The work of this paper is to study, evaluate and compare the various techniques of the DTC applied to the IPMSM through simulations. The simulations were carried out using Matlab/Simulink simulation package. Evaluation was made based on the drive performance, which includes steady state and dynamic torque and flux responses.

Keywords: Space Vector Modulation, Direct Torque Control, Interior Permanent magnet Synchronous Motor, Matlab.