Open-end Winding Synchronous Reluctance Sensorless Drive based on Indirect Matrix Converter with Dual VSI Output

Abstract

This work proposes a straight forward approach for the utilization of Direct Torque Control (DTC) algorithm to drive an openend winding Synchronous Reluctance Machine (SynRM). The drive is based on an Indirect Matrix Converter (IMC) with Dual Voltage Source Inverters (DVSI) on the output, thus eliminating the need for a dc-link. The proposed approach only utilizes the the output vectors that eliminate the contribution of the dual inverter to the Common Mode Voltage (CMV), improving the drive lifespan by reducing the machine bearing currents. The proposed Direct Torque Controller is based on four hysteretic controllers to allow the control of Torque, Flux, Zero Sequence Current on the machine while allowing input power factor correction by controlling the grid current.