scholarly journals Modified Rotor Flux Estimators for Stator-Fault-Tolerant Vector Controlled Induction Motor Drives

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3232 ◽  
Author(s):  
Mateusz Dybkowski ◽  
Szymon Antoni Bednarz
Keyword(s):  
Induction Motor ◽  
Fault Tolerant ◽  
Short Circuit ◽  
Experimental Tests ◽  
Point Of View ◽  
Stable Operation ◽  
Stator Winding ◽  
Classical State ◽  
Rotor Flux ◽  
Rotor Flux Estimators

This paper deals with fault-tolerant control (FTC) of an induction motor (IM) drive. An inter-turn short circuit (ITSC) of the stator windings was taken into consideration, which is one of the most common internal faults of induction machines. The sensitivity of the classic, well-known voltage and current models to the stator winding faults was analyzed. It has been shown that these classical state variable estimators are sensitive to induction motor parameter changes during stator winding failure, which results in unstable operation of the direct field-oriented control (DFOC) drive. From a safety-critical applications point of view, it is vital to guarantee stable operation of the drive even during faults of the machine. Therefore, a new FTC system has been proposed, which consists of new modified rotor flux estimators, robust to stator winding faults. A detailed description of the proposed system is presented herein, as well as the results of simulation and experimental tests. Simulation analyses were performed using MATLAB/Simulink software. Experimental tests were carried out on the experimental test bench with a dSpace DS1103 card. The proposed solution could be applied as an alternative rotor flux estimation technique for the modern FTC drive.

scholarly journals Application of Genetic Algorithm for Inter-Turn Short Circuit Detection in Stator Winding of Induction Motor

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8523
Author(s):  
Marcin Tomczyk ◽  
Ryszard Mielnik ◽  
Anna Plichta ◽  
Iwona Gołdasz ◽  
Maciej Sułowicz
Keyword(s):  
Genetic Algorithm ◽  
Induction Motor ◽  
Diagnostic Method ◽  
Induction Motors ◽  
Short Circuit ◽  
Experimental Tests ◽  
Stator Winding ◽  
Short Circuits ◽  
Cage Induction Motor ◽  
Industry Conditions

This paper presents a new method of inter-turn short-circuit detection in cage induction motors. The method is based on experimental data recorded during load changes. Measured signals were analyzed using a genetic algorithm. This algorithm was next used in the diagnostics procedure. The correctness of fault detection was verified during experimental tests for various configurations of inter-turn short-circuits. The tests were run for several relevant diagnostic signals that contain symptoms of faults in an examined cage induction motor. The proposed algorithm of inter-turn short-circuit detection for various levels of winding damage and for various loads of the examined motor allows one to state the usefulness of this diagnostic method in normal industry conditions of motor exploitation.

Observer-based fault diagnosis and field oriented fault tolerant control of induction motor with stator inter-turn fault

2012 ◽  
Vol 61 (2) ◽  
pp. 165-188 ◽  
Author(s):  
Djilali Toumi ◽  
Mohamed Boucherit ◽  
Mohamed Tadjine
Keyword(s):  
Fault Diagnosis ◽  
Induction Motor ◽  
Fault Tolerant ◽  
Short Circuit ◽  
Fault Tolerant Control ◽  
Field Oriented Control ◽  
Stator Current ◽  
Rotating Reference Frame ◽  
Rotor Flux ◽  
Rotor Field Oriented Control

Observer-based fault diagnosis and field oriented fault tolerant control of induction motor with stator inter-turn fault This paper describes a fault-tolerant controller (FTC) of induction motor (IM) with inter-turn short circuit in stator phase winding. The fault-tolerant controller is based on the indirect rotor field oriented control (IRFOC) and an observer to estimate the motor states, the amount of turns involved in short circuit and the current in the short circuit. The proposed fault controller switches between the control of the two components of measured stator current in the synchronously rotating reference frame and the control of the two components of estimated current in the case of faulty condition when the estimated current in the short circuit is not destructive of motor winding. This technique is used to eliminate the speed and the rotor flux harmonics and to assure the decoupling between the rotor flux and torque controls. The results of the simulation for controlling the speed and rotor flux of the IM demonstrate the applicability of the proposed FTC.

Research on Stator Winding Inter Turn Short-Circuit Faults of Aeronautical Fault-Tolerant Machine Based on Maxwell 2D

2011 ◽  
Vol 130-134 ◽  
pp. 119-123
Author(s):  
Ming Zhang ◽  
Yi Ming Zhang ◽  
Jiang Tao Tong
Keyword(s):  
Fault Tolerant ◽  
Short Circuit ◽  
Fault Model ◽  
Stator Winding ◽  
High Power Density ◽  
Induced Voltage ◽  
Magnetic Field Simulation ◽  
Voltage Frequency ◽  
Solid Foundation ◽  
Short Circuit Fault

Stator winding inter turn short-circuit fault is one of the most common internal faults of fault-tolerant machine, which can disconnect the fault phases and keep operating correctly in the event of a failure. Stator winding short-circuit fault model is established through analysis. Based on finite element method, the high-power density fault-tolerant machine internal magnetic field simulation and analysis is implemented using Maxwell2D and induced voltage frequency spectrum is analyzed by FFT method. The characteristics of stator winding short-circuit faults are summarized, which lay a solid foundation for fault-tolerant machine earlier faults prediction and winding switching.

scholarly journals An Intelligent Electronic Fuse (iFuse) to Enable Short-Circuit Fault-Tolerant Operation of Power Electronic Converters

2020 ◽  
Author(s):  
Alber Filba-Martinez ◽  
Salvador Alepuz ◽  
Sergio Busquets-Monge ◽  
Adria Luque ◽  
Josep Bordonau
Keyword(s):  
Fault Tolerant ◽  
Short Circuit ◽  
Failure Detection ◽  
Experimental Tests ◽  
Power Electronic Converters ◽  
Novel Device ◽  
Current Path ◽  
In Series ◽  
Short Circuit Fault ◽  
Short Circuit Currents

The present paper proposes a novel device defined as an intelligent electronic fuse (iFuse) meant to be connected in series with any current-bidirectional voltage-unidirectional active switch present in a given converter. The iFuse duty is to isolate its series- associated switch from the rest of the converter circuit immediately after detecting that said switch has failed in short circuit. Nonetheless, it maintains the reverse (free- wheeling) current path originally offered by the failed switch. The failure detection is performed when the failed switch causes a shoot-through event. Therefore, the iFuse is designed to be able to block the elevated current occurring in such event. The iFuse allows increasing the fault-tolerant capability and the reliability of power converters where such qualities are hindered by switch short-circuit failures, as in converters featuring parallelized switches, neutral-point-clamped multilevel topologies, or redundant legs. The feasibility of the iFuse device is verified through experimental tests, proving that the device is able to detect the failure of its associated switch and isolate it from the rest of the converter circuit in 6 μs, while stopping short-circuit currents of up to 1 kA without incurring in harmful di/dt values.

scholarly journals A Constrained Non-Linear Model Predictive Controller for the Rotor Flux-Oriented Control of an Induction Motor Drive

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3899
Author(s):  
Fabiano C. Rosa ◽  
Edson Bim
Keyword(s):  
Induction Motor ◽  
Controller Design ◽  
Experimental Tests ◽  
Operating Conditions ◽  
Drive System ◽  
Dynamic Responses ◽  
Computational Capacity ◽  
Non Linear ◽  
Predictive Controller ◽  
Rotor Flux

Predictive controllers have been extensively studied and applied to electrical drives, mainly because they provide fast dynamic responses and are suitable for multi-variable control and non-linear systems. Many approaches perform the prediction and optimization process on-line, which requires a high computational capacity for fast dynamics, such as, for example, the control of AC electric motors. Due to the complexity of embedding constraints in controller design, which demands a high computational capacity to solve the optimization problem, off-line approaches are one of the choices to overcome this problem. However, these strategies do not deal with the inherent constraints of the drive system, which significantly simplifies the design of the controller. This paper proposes a non-linear and multi-variable predictive controller to control the speed and rotor flux of an induction motor, where the constraints are treated after the controller design. Besides dealing with the constraints of the electric drive system, our proposal allows increasing the stability of the system when the model does not incorporate disturbances and when parameter incompatibilities occur. Several computer simulations and experimental tests were performed to evaluate the behavior of the proposed controller, showing good performance to track the controlled variables under normal operating conditions, under load disturbances, parametric incompatibility, and at a very low rotor speed.

Sign in / Sign up

Export Citation Format

Share Document