Comprehensive Investigation on Remedial Operation of Switch Faults for Dual Three-Phase PMSM Drives Fed by T-3L Inverters

Wang, Zheng, Wang, Xueqing, Cheng, Ming and Hu, Yihua ORCID: 0000-0002-1007-1617 (2018) Comprehensive Investigation on Remedial Operation of Switch Faults for Dual Three-Phase PMSM Drives Fed by T-3L Inverters. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 65 (6). pp. 4574-4587.

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Abstract

In this paper, the remedial operation of switch faults will be investigated comprehensively for T-type-three-level-inverter-fed dual three-phase motor drives. The open-circuit switch faults in multiple phase legs are discussed at first. The faulty conditions are classified into five categories. Different remedial strategies, namely Type-I to Type-V schemes, are proposed for different faulty conditions. In particular, three kinds of Type-III fault-tolerant control schemes are proposed by using medium-voltage vectors to synthesize small-voltage vectors, in such a way that the mid-point voltage in a dc link can be stabilized well. Then, the short-circuit faults in both clamping switches and half-bridge switches are investigated. By analysis, their operation conditions are equivalent to conditions loss of both P and N voltage levels and open-phase faults, respectively. Thus, the corresponding remedial strategies can be applied accordingly. Particularly, a voltage compensation control method is proposed for conditions, where open-switch faults coexist with open-phase operation induced by short-circuit faults in half-bridge switches. The validity of all of theoretical analysis and the proposed remedial strategies has been verified by experiments.

Item Type:	Article
Uncontrolled Keywords:	Dual three-phase permanent magnet synchronous motor (PMSM) drive, remedial operation, switch faults, space vector modulation, T-type three-level (T-3L) inverters
Depositing User:	Symplectic Admin
Date Deposited:	15 Dec 2017 16:55
Last Modified:	16 Mar 2024 20:18
DOI:	10.1109/TIE.2017.2774724
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3014248