Fault-Tolerant Control Strategy for 12-Phase Permanent Magnet Synchronous Motor

Hanying Gao, Wen Zhang, Yu Wang and Zhuo Chen
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Hanying Gao: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Wen Zhang: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Yu Wang: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Zhuo Chen: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China

Energies, 2019, vol. 12, issue 18, 1-17

Abstract: Multi-phase motors have attracted increasing attention in fields seeking high reliability, such as electric vehicles, ships, and rail transit, as they exhibit advantages, such as high reliability and fault tolerance. In this study, we consider a 12-phase permanent magnet synchronous motor (PMSM). First, a mathematical model of the 12-phase PMSM in the static coordinate system is established and the model is simplified according to the constraint condition of neutral point isolation. Second, according to the principle of invariant magnetomotive force under normal and fault conditions, two optimal control strategies of winding current, i.e. maximum torque output (MTO) and minimum copper consumption (MCC), are proposed. For a single-phase open-circuit fault, two optimization methods are used to reconstruct the residual phase current, such that the motor can maintain normal torque output and exhibit lower torque ripple under the fault state. Finally, system simulation and experimental research are conducted; the results verify the accuracy and feasibility of the fault-tolerant control strategy of the 12-phase PMSM proposed in this paper.

Keywords: 12-phase PMSM; fault-tolerant control; current optimization; neutral isolation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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