Sensorless Direct Torque Control of Induction Motor with an Open-End Stator Winding Using an Adaptive Luenberger Observer

Abstract

This work relates to the study of the sensorless direct torque control for three phase induction motor with an open-end stator winding, the motor is supplied by dual-inverter with a DC supply. The open-end winding topology offers certain advantages, such as eliminate common mode voltage at the motor terminals. This DTC scheme is proposed, where fast torque response with extension of constant torque, lower switching frequency, reduces stator flux ripple. At the same time, we estimate the rotor speed by using the adaptive Luenberger observer. The proposed observer not only improves the system dynamic performance of sensorless induction motor with an open-end stator winding. At last, the performance of the proposed control approach and estimation method is verified by simulation numerical. It can be observed that the proposed control have presented good performances of induction motor with an open-end stator winding.