Extension of Winding Function Theory for Radial and Axial Nonuniform Air Gap in Salient Pole Synchronous Machines

Akbari, Hamidreza; Meshgin-Kelk, H.; Milimonfared, Jafar

doi:10.2528/pier11011201

Cited by 7 publications

(12 citation statements)

References 30 publications

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“…However, for the calculation of machine inductances under rotor misalignment conditions, considering rotor skewing, slots effect and axial non-uniformity, the extended MWFA should be used [23]. Magnetomotive force (MMF) distribution in the air gap produced by a current i a flowing in any coil a (stator or rotor windings) is as follows:…”

Section: Inductances Of Induction Machine Under Axial Nonuniformitymentioning

confidence: 99%

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A Modified Model of Squirrel Cage Induction Machine Under General Rotor Misalignment Fault

Akbari¹

2013

PIER B

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Abstract-A great deal of researches have so far been conducted on the analysis of eccentricity in induction machines. However, they mostly consider radial non-uniformity and neglect non-uniformity in the axial direction, but in practice, the axial non-uniformity due to rotor misalignment faults is quite common. This paper presents a modified model of a three-phase squirrel cage induction machine under different rotor misalignment conditions. For this purpose, general expressions for air gap and mean radius of induction machine, considering axial non-uniformity, have been developed. The proposed model is able to calculate the time varying inductances versus rotor angle for three-phase squirrel cage induction machines under general rotor misalignment, including static, dynamic and mixed rotor misalignment in the frame of a single program. Simulation results were verified by the experimental ones.

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Section: Inductances Of Induction Machine Under Axial Nonuniformitymentioning

confidence: 99%

“…The mutual inductance between windings a and b, considering radial and axial nonuniformity, is obtained as follows [23]:…”

Section: Inductances Of Induction Machine Under Axial Nonuniformitymentioning

confidence: 99%

A Modified Model of Squirrel Cage Induction Machine Under General Rotor Misalignment Fault

Akbari¹

2013

PIER B

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“…The design of the PMSM6 can start by the expression of the airgap diameter or by the expression of the magnet volume needed to produce the desired power [8,[12][13][14][15][16][17][18]. High performance optimization algorithms (genetic or evolutionary type) can be included into the design process [19][20][21][22], in order to improve the power density of the studied machine.…”

Section: The Stator Of the Proposed Pmsm6mentioning

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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“…This theory has been applied to analyze static, dynamic and mixed eccentricity in induction and synchronous machines [7][8][9]. In [10], MWFA was extended for radial and axial non-uniform air gap in SPSMs.…”

Section: Introductionmentioning

confidence: 99%

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

Akbari¹

2013

PIER B

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Abstract-This paper develops a more precise analytical model for calculating salient pole synchronous machine (SPSM) inductances in case of general eccentricity including static, dynamic and mixed eccentricities. The developed method is based on the modified winding function approach (MWFA) which accurately considers variable air gap function and leads to pure analytical expressions of inductances. Available analytical techniques, based on MWFA, approximate the air gap function and simplify the geometrical model of SPSM, whereas, in this study, the influence of the openings between the rotor salient poles has been taken into account by using an effective form of rotor pole shoes. Using this technique, flux fringing effect is considered. By taking into account machine geometry, type of windings connection and flux fringing effect, this method is able to model most of the important features of an eccentric SPSM. The developed analytical expressions can calculate time varying inductances of SPSMs with any eccentricity type and degree in the frame of a single program. Simulation results for static eccentricity are compared with experimental tests on a laboratory generator to verify accuracy of the proposed model.

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Extension of Winding Function Theory for Radial and Axial Nonuniform Air Gap in Salient Pole Synchronous Machines

Cited by 7 publications

References 30 publications

A Modified Model of Squirrel Cage Induction Machine Under General Rotor Misalignment Fault

A Modified Model of Squirrel Cage Induction Machine Under General Rotor Misalignment Fault

Multi-Phase Synchronous Motor Solution for Steering Applications

An Improved Analytical Model for Salient Pole Synchronous Machines Under General Eccentricity Fault

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