Remedial Strategies of T-NPC Three-Level Asymmetric Six-Phase PMSM Drives Based on SVM-DTC

Wang, Xueqing, Wang, Zheng, Cheng, Ming and Hu, Yihua ORCID: 0000-0002-1007-1617 (2017) Remedial Strategies of T-NPC Three-Level Asymmetric Six-Phase PMSM Drives Based on SVM-DTC. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 64 (9). pp. 6841-6853.

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Official URL: http://dx.doi.org/10.1109/tie.2017.2682796

Abstract

In this paper, novel remedial direct torque control (DTC) schemes are proposed for open-circuit faults in T-Type neutral-point-clamping (T-NPC) three-level asymmetric six-phase permanent-magnet synchronous motor (PMSM) drives. First, a simplified space vector modulation (SVM) is designed and applied for DTC-controlled asymmetric six-phase drive, in such a way that both good current harmonic performance and fast dynamic response are available. Based on the SVM-DTC scheme, a remedial strategy is proposed for the open-circuit faults in phase windings. The key is to derive the relationship between the stator fluxes and the stator voltages of all phases under faulty condition. Then, a derived perturbation term is compensated for normal voltage references, and the fault-Tolerant scheme is, thus, implemented without changing control structure of normal condition. The remedial DTC schemes are also studied and proposed for open-switch faults in T-NPC six-phase drives. The modulation methods are redesigned for the faults in half-bridge switches and NPC switches. The experiments are carried out on a laboratory prototype to verify the validity and performance of the proposed fault-Tolerant control schemes.

Item Type:	Article
Uncontrolled Keywords:	Asymmetric six-phase permanent-magnet synchronous motor (PMSM) drives, fault-tolerant control, space vector modulation direct torque control (SVM-DTC), T-type neutral-point-clamping (T-NPC) inverter
Depositing User:	Symplectic Admin
Date Deposited:	21 Sep 2017 14:05
Last Modified:	16 Mar 2024 17:16
DOI:	10.1109/TIE.2017.2682796
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3009555