Design of a fault‑tolerant system for a multi‑motor drive with multiple inverter leg faults

Yujin Song; Jin Zhao; Jiajiang Sun

Design of a fault‑tolerant system for a multi‑motor drive with multiple inverter leg faults

Yujin Song

Jin Zhao

Jiajiang Sun

Vol. 22, No. 11, pp. 1848-1859, Nov. 2022

10.1007/s43236-022-00489-9

Two-leg fault

Secondary fault

Fault-Tolerant System

Topology reconstruction

Integrated control law

Abstract

A novel fault-tolerant system for a multi-motor drive with one-leg, two-leg, and secondary faults is designed in this study. Fault tolerance is realized from pre-fault to post-fault via a topology reconstruction scheme and an integrated control law. The scheme develops a reconstructible topology and its reconstruction algorithm. The multi-motor drive can be reconstructed into appropriate tolerant topologies on the basis of the diagnosis results. The control law based on the predictive torque control method is universal under any topology by designing a unified voltage vector model and an optimal switching state decision. The proposed system can cope with more types of faults and effectively switch from a healthy state to a fault-tolerant state under any fault. The effectiveness and performance of the fault-tolerant system are verified and demonstrated by simulation and experiment results.

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Cite this article

[IEEE Style]

Y. Song, J. Zhao, J. Sun, "Design of a fault‑tolerant system for a multi‑motor drive with multiple inverter leg faults," Journal of Power Electronics, vol. 22, no. 11, pp. 1848-1859, 2022. DOI: 10.1007/s43236-022-00489-9.

[ACM Style]

Yujin Song, Jin Zhao, and Jiajiang Sun. 2022. Design of a fault‑tolerant system for a multi‑motor drive with multiple inverter leg faults. Journal of Power Electronics, 22, 11, (2022), 1848-1859. DOI: 10.1007/s43236-022-00489-9.