Improved Voltage Model Based Flux Observer Design for Traction Induction Motor
In traction control, accurate observation of the flux is critical to achieve high performance control of the motor. This paper first summarizes the commonly used flux observation method, and analyses the working principle and existing problems of the commonly used voltage model flux observer. Then, an improved voltage model flux observer is designed, which series high-pass filter and low-pass filter. The compensation algorithm of amplitude and phase error due to the introduction of the filter is deduced, which eliminates the integral saturation problem caused by DC bias and realizes accurate observation of flux. Finally, the simulation and experimental analysis are carried out to verify the feasibility of the improved voltage model flux observer.
KeywordsFlux observer High-pass filter Low-pass filter
This work was supported by the China National Science and Technology Support Program under Grant 2016YFB1200502-04, Beijing base construction and personnel training special under Grant Z17111000220000, and the Fundamental Research Funds for the Central Universities under Grant 2016JBM058 and Grant 2016RC038.
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