Fault-tolerant analysis of two boost inverters for open-end winding induction motor drives

Abstract

An open-end winding induction motor drive system fed by two boost inverters with fault-tolerant capability is presented to improve the reliability and safety of the drive system. The boost inverters consist of an impedance-source network and a two-level inverter. It can realize the boost/buck function. An analysis of its fault-tolerance is presented in detail. Short circuits and open circuits are commonly considered as the two main types of faults. Therefore, the fault types of the dual boost inverters are analyzed and diagnosed. Then, two different fault-tolerant schemes are presented. The presented fault-tolerant inverters are restructured through the power switch itself. In addition, different SVPWM methods are addressed. A simulation model and an experimental platform are constructed. Simulation and experimental results verify the fault tolerance of the drive system.

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Acknowledgements

This work was supported in part by the National Natural Science Foundation of China under Grant 51707085 and Grant 51707086, and by the Natural Science Research Project of Jiangsu Higher Education Institutions of China under Grant 19KJB470020.

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Correspondence to Guifeng Wang.

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Li, C., Wang, G., Li, H. et al. Fault-tolerant analysis of two boost inverters for open-end winding induction motor drives. J. Power Electron. (2021). https://doi.org/10.1007/s43236-020-00201-9

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Keywords

  • Dual-boost inverters
  • Fault tolerance
  • Impedance-source network
  • Open-end winding induction motor