Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 33, Issue 2, Pages 1541-1553Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2017.2689008
Keywords
Double-stator-winding permanent magnet synchronous machine (PMSM) drives; fault-tolerant control; space vector modulation (SVM); T-type neutral-point-clamping (T-NPC) three-level inverters; vector space decomposition (VSD)
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Funding
- National Key Basic Research Program of China (973 Program) [2013CB035603]
- National Natural Science Foundation of China [51577027]
- Fundamental Research Funds for the Central Universities
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This paper studies and proposes the vector space decomposition-based direct torque control (DTC) scheme for the T-type neutral-point-clamping (T-NPC) three-level inverters-fed double-stator-winding permanent magnet synchronous machine (PMSM) drive, which provides an effective solution for high-power high-reliability applications. The key is to propose a simple but effective space vector modulation (SVM) for DTC of T-NPC double-stator- winding drives-based two-step voltage vector synthesis, in such a way that good dynamic response and harmonic performance are obtained. The closed-loop controllers on harmonic subspace are incorporated to suppress the possible harmonics induced from back electromotive force and unbalanced parameters in phase windings of electrical machine. Furthermore, a hybrid current control is proposed for fault-tolerant operation of the T-NPC double-stator-winding PMSM drives under one-phase open-circuit conditions. In the hybrid current controller, the healthy winding still uses the SVM-DTC control while the faulty winding uses the closed-loop current controller to track the optimized current references. Both simulation and experimental results are presented to verify the performance of the proposed switching strategies and control schemes.
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