Performance analysis of two different SVM-based field-oriented control schemes for eight-switch three-phase inverter-fed induction motor drives

Abstract

In this paper, two different space-vector modulation (SVM) methods which can be named SVM-1 dividing the two-phase stationary coordinate plane into eight sectors and SVM-2 dividing the two-phase stationary coordinate plane into six sectors for eight-switch three-phase inverters (ESTPIs), which are the post-fault reconfigured topologies for the three-level neutral-point-clamped (3L-NPC) inverter with failure of a power switch or a leg are introduced. This two different SVM-based field-oriented control (FOC) schemes for the ESTPI-fed induction motor drive system are also presented. The performance of this two different FOC schemes are subsequently analyzed based on the dynamic response, the ripple of the torque and the offset and fluctuation of the DC-link two capacitor voltage. It is concluded that SVM-1-based FOC scheme and SVM-2-based FOC scheme both have a good dynamic response. The ripple of the torque as well as the offset and fluctuation of the DC-link two capacitor voltage of the SVM-2-based FOC scheme is smaller. The feasibility and effectiveness are verified by experimental results.