Active Current Sensor Fault-Tolerant Control of Induction Motor Drive with Online Neural Network-Based Rotor and Stator Resistance Estimation
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Department of Electrical Machines, Drives and Measurements, Wroclaw University of Science and Technology, Wroclaw, Poland
Power Electronics and Drives 2023;8(Special Section - Advanced Control Methods of Electrical Machines and Drives ):235-251
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ABSTRACT
This article presents an active current sensor (CS) fault-tolerant control (FTC) strategy for induction motor (IM) drive with adaptation
of rotor and stator resistances. The stator current estimator with online adaptation of resistance parameters was applied for the
reconstruction of missing current signals. A model reference adaptive system (MRAS), based on a neural network (NN), was used to
estimate the rotor resistance. Additionally, stator resistance estimation was applied based on ratio index. The use of such a solution
allowed for a significant increase in the quality of stator current reconstruction, which is particularly important for the design of CS
fault detection (FD) and compensation algorithms. A wide range of simulation studies have been carried out for different operating
conditions of the IM drive. The results showed that applying rotor and stator resistance estimation can improve the quality of stator
current estimation by up to approximately 95% under rated operating point. The study was carried out for nominal and low speeds, with
two, one, and without healthy CS.