scholarly journals A Modified Winding Function Theory and Firefly Algorithm based Optimization for Diagnosis of Eccentricity in Induction Motors

2019 ◽  
Vol 8 (9) ◽  
pp. 2869-2876
Keyword(s):  
Simulation Model ◽  
Induction Motor ◽  
Firefly Algorithm ◽  
Induction Motors ◽  
Research Work ◽  
Analytical Models ◽  
Experimental Investigations ◽  
Model And Simulation ◽  
Nature Inspired Algorithm ◽  
Exact Degree

In past, several analytical models has been developed to establish the occurrence of various induction motor faults. Some of the primarily occurring faults in induction motor being; bearing and stator winding faults and to a smaller extent the other types such as rotor and eccentricity. Though there has been a lot of research work done in detection and diagnosis, still the recognition of eccentricity fault in induction motors, specifically deciding the precise degree of eccentricity is a challenging task for the researchers. In this paper, a novel model-based approach has been developed for the detection of exact type and degree of eccentricity fault present in the motor. Simulation of induction motor for both healthy and eccentricity fault has been carried out using the Modified Winding Function (MWF) approach. A procedure has been developed for estimating the eccentricity fault from simulation model. Also, a metaheuristic nature inspired algorithm, viz. Firefly Algorithm (FA) has been used for the optimization of results obtained from simulation model. The results obtained from experimental investigations are close to that obtained from simulations, confirming the applicability of used model and simulation approach to find the exact degree of eccentricity defect.

scholarly journals Comparative Analysis of Signal Processing Techniques for Fault Detection in Three Phase Induction Motor

2021 ◽  
Vol 3 (1) ◽  
pp. 61-76
Author(s):  
Thomas Amanuel ◽  
Amanuel Ghirmay ◽  
Huruy Ghebremeskel ◽  
Robel Ghebrehiwet ◽  
Weldekidan Bahlibi
Keyword(s):  
Signal Processing ◽  
Fault Detection ◽  
Induction Motor ◽  
Induction Motors ◽  
Research Work ◽  
Detection Accuracy ◽  
Frequency Information ◽  
Three Phase ◽  
Processing Techniques ◽  
Signal Processing Techniques

Signal processing is considered as an efficient technique to detect the faults in three-phase induction motors. Detection of different varieties of faults in the rotor of the motor are widely studied at the industrial level. To extend further, this research article presents the analysis on various signal processing techniques for fault detection in three-phase induction motor due to the damages in rotor bar. Usually, Fast Fourier Transform (FFT) and STFT are used to analyze the healthy and faulty motor conditions based on the signal characteristics. The proposed study covers the advantages and limitations of the proposed wavelet transform (WT) and each technique for detecting the broken bar of induction motors. The good frequency information can be collected from FFT techniques for handling multiple faults identification in three-phase induction motor. Despite the hype, the detection accuracy gets reduced during the dynamic condition of the machine because the frequency information on sudden time changes cannot be employed by FFT. The WT method signal analysis is compared with FFT to propose fault detection method for induction motor. The WT method is proving better accuracy when compared to all existing methods for signal information analysis. The proposed research work has simulated the proposed method with MATLAB / SIMULINK and it helps to effectively detect the healthy and faulty conditions of the motor.

scholarly journals Multiple three-phase induction motors connected to a zigzag transformer

2021 ◽  
Vol 3 (1) ◽  
pp. 8-14
Author(s):  
Abdelhafiz Zeiada ◽  
Ngu Eng Eng ◽  
Moataz Saad Balla
Keyword(s):  
Induction Motor ◽  
Power Supply ◽  
Induction Motors ◽  
Research Work ◽  
Voltage Supply ◽  
Excessive Heat ◽  
Network Connections ◽  
Three Phase ◽  
Unbalance Voltage ◽  
Three Phases

Many experiments have been conducted in this research work which is (i) connecting a zigzag transformer with an induction motor, (ii) connecting a zigzag transformer with multiple induction motors, and (iii) connecting multiple zigzag transformers with multiple induction motors. These experiments provide a thorough understanding of the sequence network connections under the single-phasing condition of a three-phase induction motor. Moreover, these experiments protect the three-phase induction motors from unbalancing voltage supply and allow the induction motor to start under unbalance voltage supply. Additionally, they keep the three-phase induction motor running even any one of the three phases disconnected from the power supply without creating excessive heat in the motor winding.

scholarly journals International Journal of Prognostics and Health Management, ISSN 2153-2648, 2015 007 Effectiveness of vibration monitoring in the health assessment of induction motor

2020 ◽  
Vol 6 (4) ◽  
Author(s):  
T Ch Anil Kumar ◽  
Gurmeet Singh ◽  
V N A Naikan
Keyword(s):  
Induction Motor ◽  
Induction Motors ◽  
Health Management ◽  
Health Assessment ◽  
Diagnostic Procedures ◽  
Industrial Applications ◽  
Vibration Monitoring ◽  
Experimental Investigations ◽  
Rotating Systems ◽  
Prime Movers

Induction motors are widely used prime movers for rotating machinery in most of the industrial applications. Reliability of the induction motors plays a significant role in reduction in downtime of the machinery. Proper diagnostic procedures are to be followed to assess the condition of the motor. Based on the literature, it is found that the vibration analysis is mostly used for diagnosis of rotating systems. However, industrial experiences reveal that potential motor failures have been observed very frequently even with proper vibration based condition monitoring. Therefore, this paper focuses on further investigations of whether the vibration monitoring stand alone can properly diagnose the presence of faults such as eccentricity in an induction motor or any other alternative technique should be employed in addition to the vibration monitoring for better diagnosis. In this paper, experimental investigations have been carried out to monitor the changes in the vibration and current spectrum of an eccentric motor in its decoupled and coupled state with a healthy rotor system.

scholarly journals Induction motor speed control in closed loop system with thyristor voltage regulator

2021 ◽  
pp. 64-69
Author(s):  
I. G. Odnokopylov ◽  
◽  
D. Yu. Lyapunov ◽  
N. A. Voronina ◽  
A. D. Umurzakova ◽  
...  
Keyword(s):  
Simulation Model ◽  
Induction Motor ◽  
Closed Loop ◽  
Induction Motors ◽  
Speed Control ◽  
Voltage Regulator ◽  
Motor Speed ◽  
Closed Loop System ◽  
Starting Current ◽  
Speed Sensor

There exists a huge class of actuating mechanisms based on induction motors, where the use of a thyristor voltage regulator is relevant. This paper presents studies on the introduction of the ability not only to reduce the starting current of the motor, but also to regulate the speed of rotation. Studies have been conducted on the possibility of obtaining a regulation range of 1:5 using simulation model. The influence of the resolution of the speed sensor on the accuracy of regulation is investigated. Recommendations on the implementation of the developed method of speed control are given

Starting Processes in Electric Drive of a Passenger Elevator

2021 ◽  
Vol 1 (1) ◽  
pp. 40-49
Author(s):  
S. Rachev ◽  
K. Dimitrova ◽  
D. Koeva ◽  
L. Dimitrov
Keyword(s):  
Coordinate System ◽  
Induction Motor ◽  
Electric Drive ◽  
High Speed ◽  
Induction Motors ◽  
Dynamic Loads ◽  
Design Stage ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Electric Induction

During the operation of electric induction motors used to drive passenger elevators, electro-mechanical transient processes occur, which can cause unacceptable dynamic loads and vibrations. In this regard, research is needed both at the design stage and for operating elevator systems to determine the arising impact currents and torques, in order to propose solutions for their limitation within pre-set limits. Paper deals with starting processes in a two-speed induction motor drive of a passenger elevator. The equations for the voltages of the induction motor are presented in relative units in a coordinate system rotating at a synchronous speed. The values have been obtained for the torques, the rotational frequencies and the currents when starting at a high speed and passing from high to low speed.

FE-basierte Analyse*/FE-based analysis of the influence of remachining on component characteristics adjusted by forming processes

2018 ◽  
Vol 108 (01-02) ◽  
pp. 41-46
Author(s):  
F. Vogel ◽  
M. Tiffe ◽  
M. Metzger ◽  
D. Prof. Biermann
Keyword(s):  
Simulation Model ◽  
Fe Analysis ◽  
Experimental Investigations ◽  
Model Parameters ◽  
Sequential Process ◽  
Process Chain ◽  
Innovative Material

Bei der Auslegung verknüpfter Prozessschritte zur Herstellung von Bauteilen mit gezielt eingestellten Eigenschaften finden vermehrt FE-basierte Simulationssysteme Anwendung, um den Aufwand experimenteller Untersuchungen insbesondere im Hinblick auf den gesteigerten Einsatz innovativer Werkstoffkonzepte gering zu halten. Im Folgenden wird die Ausarbeitung von Konzepten zur Anpassung von Parametern zur Materialmodellierung sowie zur Verknüpfung von Einzelsimulationen der Prozesskette erläutert.   Regarding the increased application of innovative material concepts in sequential process steps for manufacturing components with tailored properties, the FE-analysis can be used to reduce the effort of experimental investigations. In this article, the development of concepts for the adjustment of simulation model parameters and the conjunction of process chain single simulations are described.

Research and Application of Energy Saving Technology of Inverter in Light Load

2014 ◽  
Vol 577 ◽  
pp. 498-501
Author(s):  
Jiu Yan Zhou
Keyword(s):  
Energy Saving ◽  
Induction Motor ◽  
Induction Motors ◽  
Speed Control ◽  
Variable Frequency ◽  
Light Load ◽  
Variable Voltage ◽  
Energy Saving Technology

In order to analysis the variable-voltage energy saving theory and its implementation for induction motor with light-load in detail, This paper gives out a variable-voltage energy saving method, and discusses the design of variable frequency adjusting speed control and the points of attention. It is useful for the application of energy saving technology for induction motors.

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