Open AccessResearch on improved voltage-type rotor flux linkage observer method for engineering application
Author(s) -
Gang He,
Xingyan Dong,
Hui Wang,
Zhigang Zhao,
Zhiwen Luo
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1639/1/012046
Subject(s) - flux linkage , control theory (sociology) , integrator , observer (physics) , rotor (electric) , linkage (software) , offset (computer science) , voltage , engineering , computer science , physics , direct torque control , induction motor , mechanical engineering , control (management) , electrical engineering , chemistry , biochemistry , quantum mechanics , artificial intelligence , gene , programming language
Accurate rotor flux linkage observation is conducive to high-performance control of the motor. Among them, the voltage-type rotor flux linkage observer is widely used in engineering practice because of its simple structure and no need for speed information. However, the traditional voltage-type rotor flux linkage observer has an inherent pure integrator, which will affect the accuracy of flux linkage observation. This paper analyses the common low-pass filter instead of pure integrator, and the improved method of high-low-pass filter series compensation. Then, focus on derivation to get an improved voltage-type rotor flux linkage observer based on DC offset compensation. Finally, based on the theoretical analysis, the magnetic flux observation effects of the four observers are simulated and verified. The result proves that the method proposed in this paper can realize the accurate observation of the rotor flux linkage.