PROJECT TITLE :

Direct Torque Control of T-NPC Inverters Fed Double-Stator-Winding PMSM Drives With SVM - 2017

ABSTRACT:

This paper studies and proposes the vector area decomposition-based mostly direct torque control (DTC) theme for the T-kind neutral-point-clamping (T-NPC) three-level inverters-fed double-stator-winding permanent magnet synchronous machine (PMSM) drive, which provides a good solution for prime-power high-reliability applications. The key is to propose a easy however effective house vector modulation (SVM) for DTC of T-NPC double-stator-winding drives-primarily based 2-step voltage vector synthesis, in such a means that sensible dynamic response and harmonic performance are obtained. The closed-loop controllers on harmonic subspace are incorporated to suppress the potential harmonics induced from back electromotive force and unbalanced parameters in section windings of electrical machine. Furthermore, a hybrid current management is proposed for fault-tolerant operation of the T-NPC double-stator-winding PMSM drives below one-section open-circuit conditions. Within the hybrid current controller, the healthy winding still uses the SVM-DTC control whereas the faulty winding uses the closed-loop current controller to trace the optimized current references. Each simulation and experimental results are presented to verify the performance of the proposed switching ways and control schemes.