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Shen, Jianwei; Wang, Xueqing; Xiao, Dianxun; Wang, Zheng; Mao, Yao; He, Mingzhi
IEEE transactions on transportation electrification, 03/2024, Letnik: 10, Številka: 1Journal Article
To make full use of the advantages of dual three-phase permanent magnet synchronous motor (DTP-PMSM) and three-phase open-winding permanent magnet synchronous motor (OW-PMSM), this article proposed a novel typology of the motor drive which can switch between dual three-phase (DTP) structure and three-phase open-winding (OW) structure online. On this basis, the basic control and fault-tolerant control are studied to explore the superiority of the proposed typology. Under healthy conditions, no adjustment is required for the modulation method of the proposed control scheme when switching between DTP and OW mode. By using two bidirectional thyristors, smooth switching between the two modes can be guaranteed. Besides, the power weight of two inverters can be adjusted by changing the current ratio in DTP mode and changing the voltage ratio in OW mode. For the fault-tolerant control, when an open-phase fault occurs, DTP mode will be used to provide sufficient dimensions of current control and the fault-tolerant scheme can be realized through current compensation without changing the control framework. When an open-switch fault or short-switch fault occurs, OW mode will be adopted to guarantee symmetrical phase currents, and the remaining healthy switches in the faulty inverter are fully used to share the loss of the healthy inverter. The experiment has been conducted to prove the feasibility and superiority of the proposed typology and control scheme.
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in: SICRIS
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