Direct-Torque-Control Fault-Tolerant Strategies for Three Induction Motor Drive Systems Operating Under Single-Phase Open-Circuit Fault

2020 ◽  
Author(s):  
Pedro H. M. Martins ◽  
Victor F. M. B. Melo ◽  
Gilielson F. da Paz ◽  
Isaac S. de Freitas
Keyword(s):  
Induction Motor ◽  
Single Phase ◽  
Fault Tolerant ◽  
Direct Torque Control ◽  
Open Circuit ◽  
Torque Control ◽  
Necessary Condition ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Drive Systems

This paper discusses Direct-torque-control(DTC)-based fault-tolerance strategiesapplied to three fault-tolerant induction motor drive systems when they operate under single-phase open-circuit fault. Despite the fact that these drive systems have already been discussed in the literature, the reported papers always make use of Field-oriented-control(FOC)-based fault compensation strategies. In this way, performed simulations show that DTC-based strategies are feasible and are able to provide circular flux trajectory, which is the necessary condition for the motor operate properly.

Employment of torque-hysteresis controller for DTC based induction motor drive

2021 ◽  
Vol 2062 (1) ◽  
pp. 012020
Author(s):  
Payai S. Borse ◽  
Mohan P. Thakre ◽  
Rakesh Shriwastava
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Ac Drive ◽  
Hysteresis Controller ◽  
Dc Drive ◽  
Drive Systems ◽  
Simple Assembly

Abstract To acquire high enactment, Direct Torque Control (DTC) is a technique used in AC drive systems. In this paper, based on the hysteresis controller, a very simple improved DTC scheme is proposed for induction motor drive. Owing to its simple assembly & effective enactment, DTC is used for AC as well as DC drive as compared to other controlling schemes. the paper approaches mitigation of the ripples in torque by varying the predictable 3-level torque-hysteresis controller used in DTC. The expansion of distinctive switching approach has been generated for chosen voltage-vector. Based on ripple content simulation results carried out in MATLAB/SIMULINK for torque-hysteresis controller to minimize the ripples.

Neural Direct Torque Control for Induction Motor under Voltage Source Inverter Open Switch Fault

2020 ◽  
Vol 13 (4) ◽  
pp. 571-579 ◽  
Author(s):  
Farid Kadri ◽  
Mohamed A. Hamida
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Open Circuit ◽  
Drive System ◽  
Torque Control ◽  
Voltage Source ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Voltage Source Inverter ◽  
Open Switch

Background: The study of induction motor behavior during abnormal conditions due to the presence of faults and the possibility to diagnose these abnormal conditions has been a challenging topic for many electrical machine researchers. Objective: Direct Torque Control (DTC) is applied to the control of an induction motor in healthy and an open circuit fault in the PWM three phase voltage fed inverter. Neural DTC is developed and used to improve the dynamic behavior of the drive system under faulty switch occurrence. Methods: The validity of the proposed control scheme is tested under normal conditions and switching fail in the Voltage Source Inverter (VSI) caused by an open circuit. Through a simulation testing of an induction motor drive system at different speed references, a comparison between basic DTC and Neural DTC is performed. Results: Simulated results on 1.5-kW induction motor drive show the performance of the proposed control in normal and faulty cases. The stator current, flux, torque, and speed at different references are determined and compared in the above techniques using MATLAB-SIMULINK. Conclusion: A Neural Network (NN) DTC control system under an open switch fault is proposed without the need for classical switching table. The use of hybrid intelligent techniques aims to improve the DTC performances in case of multiple faults occurrence.

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