Comparison Between Finite-Element Analysis and Winding Function Theory for Inductances and Torque Calculation of a Synchronous Reluctance Machine

Lubin, Thierry; Hamiti, Tahar; Razik, Hubert; Rezzoug, A.

doi:10.1109/tmag.2007.900404

Cited by 106 publications

(58 citation statements)

References 7 publications

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“…ϕ x 2k−1 , ϕ x 2k and ϕ x 2k+1 can be easily determined at every time step of simulation. Using the definitions given in (11) and (12), L ab is obtained as (22).…”

Section: Discussionmentioning

confidence: 99%

“…In the previous works, based on winding function theory, the calculation of SPSM inductances is carried out using numerical integration or inexact analytical equations based on approximated Fourier series expansions of the inverse air gap function [11][12][13][14][15][16], except [17], in which, the air gap function has been estimated by a step function.…”

Section: Introductionmentioning

confidence: 99%

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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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“…ϕ x 2k−1 , ϕ x 2k and ϕ x 2k+1 can be easily determined at every time step of simulation. Using the definitions given in (11) and (12), L ab is obtained as (22).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Akbari¹

2013

PIER B

View full text Add to dashboard Cite

show abstract

“…In the paper, a finite element method (FEM) which is shown, among others, in the paper [11][12][13][14][15] and a fieldcircuit model were used. The use of a field-circuit model of the machine makes it unlike the circuit model to take into account such electromagnetic phenomena as for example: eddy currents or a saturation of magnetic core.…”

Section: Introductionmentioning

confidence: 99%

Detection of inter-turn short-circuit at start-up of induction machine based on torque analysis

Pietrowski

Górny

2017

Open Physics

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Abstract:Recently, interest in new diagnostics methods in a field of induction machines was observed. Research presented in the paper shows the diagnostics of induction machine based on torque pulsation, under inter-turn short-circuit, during start-up of a machine. In the paper three numerical techniques were used: finite element analysis, signal analysis and artificial neural networks (ANN). The elaborated numerical model of faulty machine consists of field, circuit and motion equations. Voltage excited supply allowed to determine the torque waveform during start-up. The inter-turn short-circuit was treated as a galvanic connection between two points of the stator winding. The waveforms were calculated for different amounts of shorted-turns from 0 to 55. Due to the non-stationary waveforms a wavelet packet decomposition was used to perform an analysis of the torque. The obtained results of analysis were used as input vector for ANN. The response of the neural network was the number of shorted-turns in the stator winding. Special attention was paid to compare response of general regression neural network (GRNN) and multi-layer perceptron neural network (MLP). Based on the results of the research, the efficiency of the developed algorithm can be inferred.

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“…The inductance of the stator changes the operating conditions due to magnetic saturation and cross-coupled magnetization effects. For this reason, many of the studies on STFs have used the finite element method (FEM) simulation [4]- [9]. However, it is difficult to apply FEM simulation to online fault diagnosis systems because the processing time of the FEM is very long.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Distributed Magnetic Flux Density under the Stator-Turn Fault Condition

Kim¹,

Hur²,

Kim³

2013

Journal of Power Electronics

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This paper proposed an analytical model for the distributed magnetic field analysis of interior permanent magnet-type blush-less direct current motors under the stator-turn fault condition using the winding function theory. Stator-turn faults cause significant changes in electric and magnetic characteristic. Therefore, many studies on stator-turn faults have been performed by simulation of the finite element method because of its non-linear characteristic. However, this is difficult to apply to on-line fault detection systems because the processing time of the finite element method is very long. Fault-tolerant control systems require diagnostic methods that have simple processing systems and can produce accurate information. Thus analytical modeling of a stator-turn fault has been performed using the winding function theory, and the distributed magnetic characteristics have been analyzed under the fault condition. The proposed analytical model was verified using the finite element method.

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Comparison Between Finite-Element Analysis and Winding Function Theory for Inductances and Torque Calculation of a Synchronous Reluctance Machine

Cited by 106 publications

References 7 publications

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

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

Detection of inter-turn short-circuit at start-up of induction machine based on torque analysis

Calculation of Distributed Magnetic Flux Density under the Stator-Turn Fault Condition

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