Hybrid Method of Obtaining Degrees of Freedom for Radial Airgap Length in SRM Under Normal and Faulty Conditions Based on Magnetiostatic Model

Torkaman, Hossein; Afjei, E.

doi:10.2528/pier09111108

Cited by 23 publications

(16 citation statements)

References 52 publications

(43 reference statements)

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“…When trying to construct an EPS which is fault tolerant, the designing process can be focused either on the power electronic converter, or on the electrical machine structure. The use of poly-phase machines and drives against conventional three-phase machines results in a more fault tolerant system, because when a fault occurs on one or several phases, the machine will still be capable to operate, with acceptable output mechanical performances which are limited only by the windings thermal harshness [7][8][9][10][11]. This is the major advantage of the multi-phase drive-machine system.…”

Section: Introductionmentioning

confidence: 99%

Multi-Phase Synchronous Motor Solution for Steering Applications

Matyas¹,

Biro²,

Fodorean

2012

PIER

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Abstract-This paper presents the analysis of a six-phase permanent magnet synchronous machine (PMSM6) dedicated for electrical power steering system applications. The motor design is briefly described, as well as the construction of the studied motor. The study is validated by finite element method and via experimental results. Some simulated results prove the machine's capability to work even in faulty conditions. The operation of the machine was evaluated in generator and motor operation. In motor operation, the PMSM6 was fed based on scalar control.

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Section: Introductionmentioning

confidence: 99%

Multi-Phase Synchronous Motor Solution for Steering Applications

Matyas¹,

Biro²,

Fodorean

2012

PIER

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“…They have low cost, are fault tolerant with a rugged structure, and operate with high efficiency over a wide speed range. Merits of using SRG have been proved for some applications like starter/generator for gas turbine of aircrafts, windmill generator and as an alternator for automotive applications [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Radial Force Characteristic Assessment in a Novel Two-Phase Dual Layer SRG Using Fem

Torkaman

Afjei²

2012

PIER

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Abstract-This paper investigates the radial force characteristics of a novel two-phase dual layer switched reluctance generator. The proposed generator consists of two magnetically dependent stator and rotor layers, where each stator set includes four salient poles with windings wrapped around them while, the rotor comprises of two salient poles. In this paper, the radial and tangential force components and their trends in healthy condition under different load levels are assessed with the respect to critical rotor positions. One of the most important problems seen in the industrial applications of generators which have concerned users is the rotor eccentricity which may conclude the unbalanced distribution of flux linkage as well as acoustic noise and vibration due to the radial forces produced during the rotation of machine's rotor. In this regard, in this paper, it is attempted to obtain and evaluate the radial force components resulted from different degrees of eccentricity faults.

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“…This approach is also employed to evaluate the performance of the motor (including flux density, flux linkages, terminal inductance and mutual inductance profile) under different rotor positions and under different varying degree of angular misalignment fault in [23]. In [24] the same approach is used and a new hybrid method of obtaining the degrees of freedom for radial air-gap length in SRM operation under normal and faulty conditions based on magnetostatic analysis is presented.…”

Section: Introductionmentioning

confidence: 99%

Torque Analysis of Faulty SRM using FEA-TFR Approach

Bouchareb¹,

Bentounsi²,

Lebaroud³

2013

IJCA

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This paper presents an analysis of effects of dynamic air-gap eccentricity on the performances of a 6/4 Switched Reluctance Machine (SRM) through finite element analysis (FEA) based on a FEMM package associated to MATLAB/SIMULINK package software. Among the various Time-Frequency methods used for detection of defects, the Time-Frequency Representation (TFR) is an appropriate tool to detect the mechanical failures through the torque analysis by allowing a better representation independent from the type of fault. Simulation results of healthy and faulty cases are discussed and illustrate the effectiveness of the proposed approach. KeywordsEccentricity, FEA, SRM, Time-Frequency Representation, Wigner-Ville Distribution. INTRODUCTIONIn a wide variety of industrial applications, an increasing demand exists to improve the reliability and availability of electrical systems. Popular examples include systems in aircraft, electric railway traction, power plant cooling or industrial production lines. A sudden failure of a system in these examples may lead to cost expensive downtime, damage to surrounding equipment or even danger to humans. Monitoring and failure detection improves the reliability and availability of an existing system. Since various failures degrade relatively slowly, there is potential for fault detection at an early stage. This avoids the sudden, total system failure that can have serious consequences.Electric machines are a key element in many electrical systems. Amongst all types of electric motors, switched reluctance drive is more fault tolerant than other drives, mostly because it can continue operating and produce torque with one or more of its phases not functioning. This is due in large part to the decoupling of the machine phases. This machine, however, is not fault free, and questions emerge as to diagnostic and detection methods. In the case of switched reluctance machine (SRM), the knowledge of the physical effects of eccentricities is not yet very complete. Among the researches, which studied SRM under dynamic eccentricity (DE) fault, we find in [21] a 6/4 SRM with dynamic eccentricity modeled and simulated using a coupled structural and electromagnetic 2D Finite Element Method (FEM).A 3D FEM approach is applied in [22] for describing the performance characteristics of a 6/4 SRM under dynamic rotor eccentricity. This approach is also employed to evaluate the performance of the motor (including flux density, flux linkages, terminal inductance and mutual inductance profile) under different rotor positions and under different varying degree of angular misalignment fault in [23]. In [24] the same approach is used and a new hybrid method of obtaining the degrees of freedom for radial air-gap length in SRM operation under normal and faulty conditions based on magnetostatic analysis is presented.[25] proposes a mathematical model for calculating forces in novel switched reluctance bearingless motor (SRBM) with a single layer winding in eccentricity conditions.A literature survey showed a la...

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Hybrid Method of Obtaining Degrees of Freedom for Radial Airgap Length in SRM Under Normal and Faulty Conditions Based on Magnetiostatic Model

Cited by 23 publications

References 52 publications

Multi-Phase Synchronous Motor Solution for Steering Applications

Multi-Phase Synchronous Motor Solution for Steering Applications

Radial Force Characteristic Assessment in a Novel Two-Phase Dual Layer SRG Using Fem

Torque Analysis of Faulty SRM using FEA-TFR Approach

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