Experimental implementation of direct torque control of open end winding induction motor

Abstract

In this paper, a modified switching algorithm for open end winding induction motor drive with less number of switching states is implemented. Open end winding induction motor requires two voltage sources operating in dual mode. With the help of two inverters, it generates 18 active voltage space vectors and three-level output voltage. The proposed algorithm is implemented to operate the induction motor drive only with two-level output voltage. Hence, the proposed algorithm is implemented only with 6 active voltage vectors and 2 null vectors. By using the proposed algorithm the induction motor drive is operated with two-level voltage and requires 8 switching states, so it provides higher switching states redundancy. The effectiveness of proposed algorithm verified experimentally with dspace DS-1104 and it is interfaced through MATLAB/simulink RTI-model.