Finite Element Method Simulation of Photoinductive Imaging for Cracks

Tai, Cheng‐Chi; Pan, Yen-Lin

doi:10.2528/pierl07122807

Cited by 14 publications

(11 citation statements)

References 6 publications

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“…The Finite Element Method can be one of the best choices for providing realistic and precise model [30,31,[36][37][38]. Also, 3D-FEM has advantages over 2D in many applications modeling [32,33], for example the skew effect, end ring effect and some other practical issues such as motor length are missed in two dimensional analyses.…”

Section: Finite Element Modeling Of Srm Under Faulty and Healthy Opermentioning

confidence: 99%

Fem Analysis of Angular Misalignment Fault in SRM Magnetostatic Characteristics

Torkaman¹,

Afjei²

2010

PIER

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Abstract-This paper proposes magnetostatic analysis of Switched Reluctance Motor (SRM) under angular misalignment fault to evaluate the performance of the motor under different operating conditions. In this analysis three-dimensional finite element method (FEM) is used to simulate reliable and precise model by considering the complex motor magnetic geometry, end effects, axial fringing effects as well as nonlinear properties of the magnetic materials. The FE analysis is performed to obtain the static magnetic characteristics of SRM including flux density, flux linkages, terminal inductance and mutual inductance profile under different rotor positions for different varying degree of faults. Consequently, it presents assessing the features of mutual inductance in inactive phases to study the variations of diagnosis index. The results obtained present useful information regarding the detection of fault and its direction as well as the amount of angular misalignment fault in the motor. To the best knowledge of the authors, such an analysis has not been carried out previously.

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Section: Finite Element Modeling Of Srm Under Faulty and Healthy Opermentioning

confidence: 99%

Fem Analysis of Angular Misalignment Fault in SRM Magnetostatic Characteristics

Torkaman¹,

Afjei²

2010

PIER

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“…Automatic mesh generation and adaptivity for FEM plays an important role in electromagnetic systems. The optimal mesh density was generated automatically by the system according to the boundary curvature, thickness element number, the field variable gradient distribution of temperature, strain and strain rate, and density window [17][18][19][20].…”

Section: Simulation Of Magnetic Leakage Fields In the Cit Systemmentioning

confidence: 99%

Reduction of Leakage Magnetic Field in Electromagnetic Systems Based on Active Shielding Concept Verified by Eigenvalue Analysis

Faghihi¹,

Heydari²

2009

PIER

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Abstract-Leakage fields are one of the main issues in design of electromagnetic systems. Some of these fields close their paths through the core and air, giving rise to non-ideal behavior of the magnetic systems. This paper explains a novel concept of active shielding which consists of two compensation coils in series and generates a counter field opposite to the leakage fields leaking from an iron-core system. As the method is based on physical reasoning of electromagnetic coupled circuit theory, the design criterions for the compensating coils parameters, their number of turns and their adaptation to the systems, were considered. The state of the art is presented by a model which is verified by roots of system characteristic equations, using state equations. In a case study, this method was investigated in a 25 kA (125 kVA) current injection transformer (CIT) system delivering a secondary current as closely proportioned to the primary current as possible, using finite element method (FEM) simulation. This paper will also push the state of the art by reducing the age effect of the CIT through mechanical force reduction.

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“…The finite element method (FEM) has been widely used during the last two decades in the electromagnetic analysis [7][8][9][10][11][12][13][14]. In 1992, time stepping finite element (TSFE) method was used for modeling, analyzing and predicting induction motor performance [15,16].…”

Section: Introductionmentioning

confidence: 99%

Static Eccentricity Fault Diagnosis in an Accelerating No-Load Three-Phase Saturated Squirrel-Cage Induction Motor

Faiz¹,

Ebrahimi²

2008

PIER B

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Abstract-A no-load induction motor under static eccentricity is modeled using time stepping finite element (TSFE) method; current, torque, and speed signals of the motor are obtained by finite element method (FEM) and used for static eccentricity fault diagnosis and analysis. The frequency spectrum analysis of the stator current around fundamental frequency component is used to predict the static eccentricity. Noise, unbalanced magnetic pull (UMP) and arc occur during the starting of the faulty motor, therefore, performance of the motor over the period of starting up to the steady-state is investigated. It is shown that the rate of obtained signals from the constant permeability based analysis is very larger than that of the real case. It is indicated that in order to obtain accurate results the saturation must be taken into account in the analysis of the motor. Simulation results for a 3 hp, three-phase, 230 V, 36 stator slots induction motor with 28 rotor slots are given in this paper. Experimental results for the motor confirm the simulation results very well.

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Finite Element Method Simulation of Photoinductive Imaging for Cracks

Cited by 14 publications

References 6 publications

Fem Analysis of Angular Misalignment Fault in SRM Magnetostatic Characteristics

Fem Analysis of Angular Misalignment Fault in SRM Magnetostatic Characteristics

Reduction of Leakage Magnetic Field in Electromagnetic Systems Based on Active Shielding Concept Verified by Eigenvalue Analysis

Static Eccentricity Fault Diagnosis in an Accelerating No-Load Three-Phase Saturated Squirrel-Cage Induction Motor

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