Indirect field-oriented control of star-connected three-phase induction machine drives against single-phase open-circuit fault

摘要

The present study aims to propose an indirect field-oriented control (IFOC) strategy for star-connected three-phase induction machine (SCTPIM) drives against single-phase open-circuit fault. In the proposed IFOC method, transformation matrices (TMs) are applied to the faulty SCTPIM equations. Based on the results, the asymmetrical equations of the faulty SCTPIM can be transformed into symmetrical equations by using these matrices. The symmetrical equations have structures which are similar to healthy SCTPIM equations. Thus, a midfield IFOC strategy could be shared during both normal and open-phase fault operations. The performance of the proposed control system was confirmed based on the simulations and experiments for a vector controlled 0.75 kW SCTPIM drive. The results confirmed the effectiveness of the introduced controller in the speed and torque ripples decreasing of the faulty SCTPIM and eliminating the unbalances in the faulty SCTPIM currents.