Modelling of Closed Loop Speed Control for Pmsm Drive

Abstract

Permanent magnet synchronous motors (PMSM) are widely used in high performance drive such as ratio, high power density, high reliability, and easy to control. High power density and high efficiency industrial robot, machine tool. PMSM has characteristics like high efficiency, simple structure, high torque/inertia make PMSM as better option as compared to induction motor. The electromagnetic torque in PMSM is usually controlled by controlling the armature current due to fact that the electromagnetic torque is proportional to the armature current. Direct Torque Control (DTC) technique for a PMSM motor is receives increasing attention because it eliminate current controller & low dependence on motor parameters as compared with other motor control techniques. The basic principle of DTC is to directly select stator voltage space vectors according to the differences between reference and actual values of torque and stator flux linkages. A mathematical model for the proposed DTC of the PMSM topology is developed. A simulation model is developed using MATLAB/SIMULINK software used to verify the performance of the PMSM drive using two level inverter.