Diagnosis and control of multi-level inverter fed dual stator induction machine using DTC-SVPWM

As industrial fields continue to develop, a wide range of machines are being integrated, with the Double Stator Induction Machine (DSIM) being one notable example, which has been increasingly used in variable speed drives in recent years. However, its complex structure is the subject of ongoing research into its control. Though more reliability is offered by the DSIM itself due to the presence of a dual stator. Fault detection is most profitable and its location most required to ensure service diagnosis for the inverter, as it remains the most sensitive part. A control strategy based on Direct Torque Control combined with Space Vector PWM for a DSIM (DTC-SVPWM-DSIM) and detect and locate an open-circuit fault in an IGBT switch within a three- level inverter are addressed in this paper. The enhancement of torque and flux quality owed to the proposed control strategy, as well as the effectiveness of the open-circuit fault detection and location method and the impact of the inverter on the drive system service diagnosis, are illustrated by several results.