Browsing by Author "Halem, N."

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    Analysis Of Induction Motor With Broken Bars And Constant Speed Using Circuit-field Coupled Method
    (University of Eloued جامعة الوادي, 2011-01-01) Halem, N.; Zouzou, S. E.; Srairi, K.
    The paper presents the use of the two-dimensional finite element method for modeling the three-phase squirrel-cage induction motor by using circuit coupled method. In order to analyze the machine performances, the voltage source is considered. The Ansys magnetic analysis software is used for calculating the magnetic field of an induction motor having a cage fault. The experimental results prove that the proposed approach constitutes a useful tool for the study and diagnostics of induction motors.
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    Detection Of Static Eccentricity Fault In Psh Induction Motor By Using External Magnetic Flux Density
    (University of Eloued جامعة الوادي, 2016-09-01) Halem, N.; Zouzou, S. E.; Ghodbane, H.
    The objective of this paper is to make a clear and thorough investigation about the effectiveness of Motor Current Signature Analysis (MCSA) for detecting default indexes of static eccentricity in (Principal Slot Harmonics) PSH induction motor. The obtained results using traditional technique (MCSA) are compared with spectrums of external magnetic flux density extracted from healthy and faulty motors. The work is carried out with transient finite element method (FEM) simulations considering motor operation under nominal mechanical load, the notching nature of stator and rotor and the non-linearity behavior of ferromagnetic material are taking into account.
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    Detection Of Static Eccentricity Fault In Saturated Induction Motors By Air-gap Magnetic Flux Signature Analysis Using Finite Element Method
    (University of Eloued جامعة الوادي, 2013-01-01) Halem, N.; Zouzou, S. E.; Srairi, K.; Guedidi, S.; Abood, F. A.
    Unfortunately, motor current signature analysis (MCSA) cannot detect the small degrees of the purely static eccentricity (SE) defects, while the air-gap magnetic flux signature analysis (FSA) is applied successfully. The simulation results are obtained by using time stepping finite elements (TSFE) method. In order to show the impact of magnetic saturation upon the diagnosis of SE fault, the analysis is carried out for saturated induction motors. The index signatures of static eccentricity fault around fundamental and PSHs are detected successfully for saturated motor.
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    Diagnosis Of Rotor Fault Using Neuro-fuzzy Inference System
    (University of Eloued جامعة الوادي, 2017-01-01) Merabet, H.; Bahi, T.; Drici, D.; Halem, N.; Bedoud, K.
    The three-phase induction machine (IM) has a large importance and it is widely used as electromechanical system device, and because of their; robustness, reliability, and simple design with the well developed technologies. In spite of all cited advantages, the induction machines are suscptible to various types of electrical and mechanical faults that can lead easly to excessive downtimes, which can lead to tuge losses in terms of maintenance and production. This work presents a reliable approach for diagnosis and detection of broken bar faults in induction machine. The detection of faults is based on monitoring of the stator current signal. Also the calculation of relative energy value for each level of signal decomposition is determinated by using package wavelet, and this method will be useful as data input of Adaptive Neuro-Fuzzy Inference System (ANFIS). In the ANFIS approach the adaptive Neuro-Fuzzy inference system is able to identify the rotor of induction machine state with high precision.This method is applied by using the MATLAB®/Simulink software.
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    Influence Of Broken Rotor Bars Location In The Squirrel Cage Induction Motor Using Finite Element Method
    (University of Eloued جامعة الوادي, 2012-07-01) Halem, N.; Zouzou, S. E.; Srairi, K.; Guedidi, S.
    It is well known that the number of broken bars and varying load affect on the amplitudes of specific harmonic components in the process analysis of induction motors under broken rotor bars. The location of broken bars is an important factor which affects the diagnosis of the broken bars defect. In this paper the simulation is determinate for different cases for distribution of broken bars under induction motor pole in order to show the impact of broken bars location upon the amplitude of harmonic fault. The simulation results are obtained by using time stepping finite elements (TSFE) method. The geometrical characteristics of motor, the effects of slotting and the magnetic saturation of lamination core are included in induction motor model.