Stator Winding Leakage Inductances Determination using Finite Elements Method

Chiver, Olivian; Micu, E.; Barz, C

doi:10.1109/optim.2008.4602389

Cited by 16 publications

(12 citation statements)

References 4 publications

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“…The first main contribution of this paper is the achievement of a study regarding the accuracy of the analytical computation of the end winding inductance for two-layer, three-phase windings. The reference values are the ones determined by a FEM based method [7], unanimously accepted as having more accurate results than other possible methods to use (in design stage), and verified experimentally. Second, following the comparison, corrections of the analytical relationships are proposed for the analytical values to be closer to the simulated ones, which are, of course, considered more accurate.…”

Section: Resultsmentioning

confidence: 99%

Study on the End Winding Inductance of Three-Phase Windings in Two Layers

2019

Teh. vjesn.

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This work addresses the issue of the accuracy with which the stator end winding inductance of A.C. machines is determined in the design stage. Only two-layer windings having a shortened pitch are treated in this paper. The end winding inductance was calculated by determining the distribution of the magnetic field, performing numerical analyses based on finite elements method (FEM).The manner of how the inductances are determined using the analysis results is described in the paper. For validating the procedure, comparisons between FEM results and laboratory tests were performed in case of one of the studied machine. There is a very good correlation between the results. Then, a comparative FEM-Analytical study was carried out. Own program was used to design and build the models necessary in the study. Based on about 130 models, some important conclusions have been depicted.

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Section: Resultsmentioning

confidence: 99%

Study on the End Winding Inductance of Three-Phase Windings in Two Layers

2019

Teh. vjesn.

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“…To clearly present the relationships, L σ is calculated by imposing symmetry boundary conditions on stator inner surface in 3-D FEA models [25], [26]. These conditions prohibit armature flux from entering the air gap and constrain it flowing parallel to these faces, as in Fig.…”

Section: A Stator Leakage Inductancementioning

confidence: 99%

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

et al. 2019

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Fractional slot concentrated winding machines (FSCWMs) with the low operation speed and large diameter usually have a large number of poles and slots; thus, numerous pole/slot combinations are feasible. The common practice to choose pole/slot combinations by multiplying the basic combinations may neglect some competitive candidates. Taking 36-slot FSCWMs as examples, this paper investigates the influence of pole numbers on torque density and flux-weakening ability, the two most vital performances of wheel-hub machine. It is shown that the machines with pole number slightly less than the slot number have the highest torque densities. Each component of synchronous inductance is separately analyzed, and its variation against pole numbers shows obvious regularity. Machines with pole numbers larger than the slot numbers have an excellent flux-weakening ability due to the large inductance and small permanent magnet flux linkage. The measurements together with the finite element analysis results confirm that the stator leakage inductance contributes the most to the superior flux-weakening ability. The identical analysis is also performed on 54-slot and 81-slot FSCWMs, with similar regularities observed.

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“…The Prony algorithm exponentially provides the frequency, magnitude, and damping factor information for all modes of the imported discrete transient signal. As described in [19], the Prony algorithm and least squares algorithm are used to determine the short-circuit time constant. The mathematical model of the Prony algorithm is shown in Equations (16) and (17).…”

Section: Time Constant Computation and Developed Programmentioning

confidence: 99%

“…This phenomenon should also be considered in the computational analysis of leakage inductance and finally in the determination of transient parameters. FE computation of leakage inductances has been previously reported and discussed in [14][15][16][17][18][19]. For time constant determination, a curve fitting technique might be helpful when applied to calculate the time constants [12,20].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Computation of Transient Parameters of a Salient-Pole Synchronous Machine

et al. 2017

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This paper presents a novel method for calculating the transient parameters of a saturated salient-pole synchronous machine (SPSM) with damper cage using finite element analysis. All detailed leakage inductances in a modified d-q model are discussed and separately extracted. In addition; the frozen permeability method is used in a 2-D finite element analysis to consider saturation and skin effects for determining the inductances. The terminal reactance parameters are obtained from all elements of the d-and q-axis equivalent circuits in all the chosen time constants during the transient process. The variation of leakage inductances of the SPSM in transient processes is also investigated and discussed. To determine transient time constant parameters; the Prony algorithm is applied in the presented method. A program developed to automatically solve the simulation and computation with the proposed method is described. This method is applied to a prototype and validated by experimental results. Some discussion about the relationship between rotor geometric design and the transient parameters of SPSMs is provided. The variation of leakage magnetic field of SPSMs in transient processes is also investigated. This method can be applied in transient parameter estimation and optimization of SPSMs in the design stage.

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Stator Winding Leakage Inductances Determination using Finite Elements Method

Cited by 16 publications

References 4 publications

Study on the End Winding Inductance of Three-Phase Windings in Two Layers

Study on the End Winding Inductance of Three-Phase Windings in Two Layers

Investigation Study of the Influence of Pole Numbers on Torque Density and Flux-Weakening Ability of Fractional Slot Concentrated Winding Wheel-Hub Machines

Finite Element Computation of Transient Parameters of a Salient-Pole Synchronous Machine

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