Induction motor pre-excitation starting based on vector control with flux linkage deviation decoupling

Zhe Cao1 , Jingzhuo Shi2 , Bo Fan3

1, 2, 3Information Engineering College, Henan University of Science and Technology, Luoyang, China

2Department of Electrical Engineering, Henan University of Science and Technology, Luoyang, China

3Corresponding author

Journal of Vibroengineering, (in Press). https://doi.org/10.21595/jve.2020.21635
Received 5 August 2020; received in revised form 1 November 2020; accepted 12 November 2020; published 6 January 2021

Copyright © 2021 Zhe Cao, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Abstract. The traditional starting methods for induction motors are easy to cause excessive starting current, which causes serious damage to AC speed regulating system. With analysis on the essence of magnetic field control, A method on asynchronous motor pre-excitation starting based on flux linkage compensation deviation decoupling is proposed in this paper. Based on vector control, a DC flux linkage with stable amplitude and direction is established by using DC pre-excitation starting method. According to the fluctuation of flux linkage in dynamic process and the coupling of the system, flux compensation algorithm and deviation decoupling control are used to decouple the flux compensation and the system to realize the smooth starting of the motor. The experimental results show that the proposed method can effectively reduce the starting peak current and improve the starting performance.

Induction motor pre-excitation starting based on vector control with flux linkage deviation decoupling

Highlights
  • The DC flux linkage with stable amplitude and direction is established.
  • The flux compensation algorithm and deviation decoupling control are applied.
  • The excitation current and torque current are set by DC pre-excitation control.
  • Comparative experiments of several methods show the proposed method better performance.

Keywords: pre-excitation starting, flux linkage compensation, deviation decoupling, vector control, induction motor.