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Modeling and Analytical Calculation of a Multiphase Induction Motor in the Phase Loss Asymmetrical Transient Process

  • Haitao Liu
  • Dong WangEmail author
  • Xinqiang Yi
Original Article
  • 3 Downloads

Abstract

The multiphase independent winding induction motor (MIWIM) has wide application in AC drive systems of high control redundancy necessary to ships and coal mines. An accurate analysis of its phase loss transient process is a prerequisite for the phase loss fault-tolerant control. When a phase loss occurs, the internal magnetic fields of the MIWIM are asymmetric. In this case, conventional coordinate transformation or resultant space vector cannot be used to reduce the mathematical model of the motor phase loss to a lower order. Using a five-phase induction motor as an object of study, this paper presents a full-order mathematical model suitable for the asymmetric state in the αβ–z1–z2–z3 coordinate system. The factor analysis of the frequency domain and no consideration of its small value make it possible to reduce the order of the analytical model. According to the constraint relationship between voltage and current, an analytical analysis is made of the motor dynamic characteristics after a phase loss. The results are in agreement with those of numerical simulation and experiment, which verify that the phase loss asymmetric transient model and analytic method of the MIWIM are feasible and effective.

Keywords

Transient model Analytical calculation Induction motor Phase loss 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant 51690181, 51477180 and 51807202.

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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  1. 1.National Key Laboratory for Vessel Integrated Power System TechnologyNaval Engineering UniversityWuhanChina

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