Axial Flux and Eddy-Current Loss in Active Region of a Large-Sized Squirrel-Cage Induction Motor

Lin, Ranran; Haavisto, Ari; Arkkio, Antero

doi:10.1109/tmag.2010.2064782

Cited by 20 publications

(11 citation statements)

References 16 publications

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“…With the laminate approximated by a homogeneous block, it is sufficient to measure or calculate spatial averages of the boundary fields in the stacking direction as long as the laminate end effects are considered. The anisotropic material can be defined to have effective permeabilities [2,3] and equivalent, zero or near zero conductivity in the stacking direction [4][5][6]. The equivalent conductivity in the stacking direction goes to zero when the laminate sheet thickness divided by the laminate width goes to zero [4].…”

Section: Introductionmentioning

confidence: 99%

Harmonically Time Varying, Traveling Electromagnetic Fields Along a Laminate Approximated by a Homogeneous, Anisotropic Block With Infinite Length

Marcusson¹,

Lundin²

2017

PIER B

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Analytical expressions that include arbitrarily directed fields on all laminate boundaries can be used for calculation of the fields inside the laminate when the boundary fields are known from, e.g., measurements. A linear laminate block could be used in non-destructive testing for comparisons between different laminates. This article contains derivation of Fourier series of harmonically time varying, traveling electromagnetic fields in homogeneous, anisotropic approximations of laminates. The component of the magnetic field strength in the stacking direction is used as a source term in twodimensional Poisson equations for the magnetic field strength in other directions. This approximation is here used in three dimensions under the precondition that the conductivity is much smaller in the laminate stacking direction than in the other directions. Sine interpolation and different choices of types of boundary conditions are discussed. Different alternative subdivisions of the Poisson boundary value problems are treated. Shorted derivations of simple analytical expressions are given for both traveling and standing waves in two dimensions. Results from Fourier series in the three-dimensional case are compared with results from finite element calculations.

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Section: Introductionmentioning

confidence: 99%

Harmonically Time Varying, Traveling Electromagnetic Fields Along a Laminate Approximated by a Homogeneous, Anisotropic Block With Infinite Length

Marcusson¹,

Lundin²

2017

PIER B

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“…Many papers have presented eddy current analysis for laminated cores [1][2][3][4][5]. Most of these analysis models are related to large size electric machines such as turbine generators and transformers [1][2][3], or those for high harmonic applications such as reactors [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Most of these analysis models are related to large size electric machines such as turbine generators and transformers [1][2][3], or those for high harmonic applications such as reactors [4,5]. In those applications, the eddy current loss by the flux, which is perpendicular to the laminated cores, is only a few percentages of the total iron losses.…”

Section: Introductionmentioning

confidence: 99%

“…Its fundamental magnetic frequency is 150 Hz at the rated speed, the output power is under 1 kW, the outer diameter is 206 mm and the axial length is 112 mm. If a general longitudinal flux rotary machine (LFRM), similar to the machines in [1][2][3], had these characteristics the eddy current loss would not be quite as severe a problem because of the laminated cores. The TFRM in this paper also has laminated stator cores, these consist of inner and outer cores whose laminated directions are perpendicular to each other considering magnetic flux path.…”

Section: Introductionmentioning

confidence: 99%

“…First, the analysis model and method are introduced, and then the measured and calculated results are compared in order to verify the validity of the analysis and show how severe the eddy current loss is. Next, the variation of the losses with the number of slits employed is also investigated using both experiment and 3D FEA based on the T-Ω formulation, where T denotes the electric vector potential representing eddy currents in the conducting regions and Ω denotes the magnetic scalar potential [3,8,9]. Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stator Core with Slits in Transverse Flux Rotary Machine to Reduce Eddy Current Loss

Lee¹,

Koo²,

Kang³

et al. 2012

Journal of Magnetics

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This paper presents an eddy current loss analysis for a transverse flux rotary machine (TFRM) with laminated stator cores, which consist of inner and outer cores whose laminated directions are perpendicular to each other. Although the TFRM is laminated to reduce eddy current losses, it still exhibits rapidly increasing core losses as the frequency increases. To solve this problem, slits are introduced to the stator outer core. 3-dimensional finite element analysis (3D FEA) based on the T-Ω formulation is used to solve the eddy-current problem for a various numbers of slits in the nonlinear lamination core. The effects of the slits are confirmed using experiment data and 3D FEA results.

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Analysis of Transient Magnetic Force on End-Winding in the Inverter-Fed Induction Machine

Tang

Ruan

Hengyu

et al. 2019

J. Electr. Eng. Technol.

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Axial Flux and Eddy-Current Loss in Active Region of a Large-Sized Squirrel-Cage Induction Motor

Cited by 20 publications

References 16 publications

Harmonically Time Varying, Traveling Electromagnetic Fields Along a Laminate Approximated by a Homogeneous, Anisotropic Block With Infinite Length

Harmonically Time Varying, Traveling Electromagnetic Fields Along a Laminate Approximated by a Homogeneous, Anisotropic Block With Infinite Length

Stator Core with Slits in Transverse Flux Rotary Machine to Reduce Eddy Current Loss

Analysis of Transient Magnetic Force on End-Winding in the Inverter-Fed Induction Machine

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