Open AccessHigh-precision Flux Linkage Observation of Induction Motor based on Spectral Decomposition Theory
Author(s) -
Yonglong Pan,
Weifeng Zhang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/571/1/012049
Subject(s) - flux linkage , control theory (sociology) , induction motor , observer (physics) , magnetic flux , flux (metallurgy) , inverter , decomposition , rotor (electric) , vector control , physics , computer science , direct torque control , power (physics) , magnetic field , chemistry , control (management) , voltage , artificial intelligence , organic chemistry , quantum mechanics
In the vector control system of induction motor, there is a delay in the switching device, which causes current distortion and motor performance degradation. Especially for high-power induction motors, the switching frequency of the inverter system is low, and the time delay effect is obvious. The mathematical model of magnetic flux observation of induction motors generally ignores the delay of the switching device. Therefore, the mathematical model is not accurate and the accuracy of the magnetic flux observation is not high. To address this problem, the mathematical model of the induction motor with delay is established, and the spectral decomposition flux linkage observer is designed to observe the rotor flux linkage in this paper. The designed spectral decomposition magnetic flux observer has the advantages of high magnetic flux observation accuracy. Simulation results prove the feasibility and effectiveness of the designed spectral decomposition flux observer.