Research for an enhanced fault-tolerant solution against the current sensor fault types in induction motor drives

Authors

DOI:

https://doi.org/10.20998/2074-272X.2024.6.04

Keywords:

current sensor fault, estimated current, fault-tolerant control, field-oriented control, induction motor drive

Abstract

Introduction. Recently, three-phase induction motor drives have been widely used in industrial applications; however, the feedback signal failures of current sensors can seriously degrade the operation performance of the entire drive system. Therefore, the motor drives require a proper solution to prevent current sensor faults and improve the reliability of the motor drive systems. The novelty of the proposed research includes integrating the current sensor fault-tolerant control (FTC) function according to enhanced technique into the field-oriented control loop for speed control of the motor drive system. Purpose. This research proposes a hybrid method involving a third difference operator and signal comparison algorithm to diagnose various types of current sensor faults as a positive solution to enhance the stability of the induction motor drive system. Methods. A hybrid method involving a third difference operator for the measured speed signals and a comparison algorithm between measured and estimated current signals are proposed to diagnose the current sensors’ health status in the fault-tolerant process. After determining the faulty sensor, the estimated current signals based on the Luenberger observer are used immediately to replace the defective sensor signal. Results. The current sensor is simulated with various failure types, from standard to rare failures, to evaluate the performance of the FTC method implemented in the MATLAB/Simulink environment. Simultaneously, a fault flag corresponding to a defective sensor should be presented as an indicator to execute the repair process for faulty sensors at the proper time. Practical value. Positive results have proven the feasibility and effectiveness of the proposed FTC integrated into the speed controller to improve reliability and ensure the stable operation of the induction motor drive system even under current sensor fault conditions. References 29, tables 3, figures 10.

Author Biographies

C. D. Tran, Ton Duc Thang University

Doctor on Electrical Engineering, Power System Optimization Research Group, Faculty of Electrical and Electronics Engineering

M. Kuchar, VSB-Technical University of Ostrava

Professor, Doctor on Electrical Engineering, Department of Applied Electronics, Faculty of Electrical Engineering and Computer Science

P. D. Nguyen, Saigon University

PhD Student, Faculty of Electronics and Telecommunication

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Published

2024-10-18

How to Cite

Tran, C. D., Kuchar, M., & Nguyen, P. D. (2024). Research for an enhanced fault-tolerant solution against the current sensor fault types in induction motor drives. Electrical Engineering & Electromechanics, (6), 27–32. https://doi.org/10.20998/2074-272X.2024.6.04

Issue

No. 6 (2024)

Section

Electrotechnical complexes and Systems

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Copyright (c) 2024 C. D. Tran, M. Kuchar, P. D. Nguyen

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