Computation of end-winding inductances of rotating electrical machinery through three-dimensional magnetostatic integral FEM formulation

Calvano, Flavio; Mut, G. Dal; Ferraioli, F.; Formisano, A.; Marignetti, Fabrizio; Martone, R.; Rubinacci, G.; Tamburrino, Antonello; Ventre, Salvatore

doi:10.1108/compel-04-2013-0135

Cited by 2 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simultaneously, with the IC sources allowing the IFTs to become permeable (Dular et al, 2010), the windings are progressively defined at various levels of precision for their geometry and the distribution of the current they carry. They can progress from 1-D to 2-D to 3-D (Calvano et al, 2013;Chiariello et al, 2015), from single wire to volume FE geometries and from stranded (uniform current density distributions in their cross-sections) to massive conductors to improve the local field distributions and to accurately render skin and proximity effects (Dular et al, 2012(Dular et al, , 2014(Dular et al, , 2015a. The global inductive and resistive behaviors are improved as well.…”

Section: Progressive Magnetostatic and Magnetodynamic Models Methodologymentioning

confidence: 99%

Model refinements of transformers via a subproblem finite element method

Dular

Kuo‐Peng

Luz

et al. 2017

COMPEL

View full text Add to dashboard Cite

-A progressive modeling of transformers is performed via a subproblem finite element method. A complete problem is split into subproblems with different adapted overlapping meshes. Model refinements are performed from ideal to real flux tubes, 1-D to 2-D to 3-D models, linear to nonlinear materials, perfect to real materials, single wire to volume conductor windings, and homogenized to fine models of cores and coils, with any coupling of these changes. The proposed unified procedure efficiently feeds each subproblem via interface conditions, which lightens mesh-to-mesh sources transfers, and quantifies the gain given by each refinement on both local fields and global quantities.

show abstract

Section: Progressive Magnetostatic and Magnetodynamic Models Methodologymentioning

confidence: 99%

Model refinements of transformers via a subproblem finite element method

Dular

Kuo‐Peng

Luz

et al. 2017

COMPEL

View full text Add to dashboard Cite

show abstract

“…Finite Elements Method (FEM) requires the fine discretization of conductors' volume, and also of the surrounding areas, within an accuracy suited for extracting inductances of complex 3D coils, possibly with fine details, such as the case of end-windings of electrical machines (Calvano et al, 2013). For these reasons, the computational burden of a FEM code can be very high, and a number of accelerating techniques are available in literature (e.g.…”

Section: Introductionmentioning

confidence: 99%

A high-performance computing procedure for the evaluation of 3D coils inductance

Chiariello¹,

Formisano²,

Martone³

2015

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

Self Cite

View full text Add to dashboard Cite

Purpose -Inductances of complex coils, in the presence of linear materials only, can be computed by discretizing coils into simpler elements, whose magnetic behavior is analytically expressible, and suitably combining elementary contributions. Reliable results require high numbers of elements. In such cases, advantages can be taken from Graphic Processor Unit (GPU) capabilities of dealing efficiently with high numbers of repeated simple computational tasks. The purpose of this paper is to set up a fast and prompt numerical procedure to cope with the above described task. Design/methodology/approach -The coils are first decomposed into current segments, taking into account accuracy, relative position and shape of coils to determine the number of segments. An analytical formula is then used to compute elementary contributions using GPUs to speed up the process, and finally superposition is used to recover the result. Findings -The main advantages of the proposed approach are first demonstrated using simple examples, with analytical solutions, to validate the method accuracy and promptness, then more complex cases are taken to demonstrate its generality.Research limitations/implications -The method is intrinsically limited by the linearity assumption, excluding the presence of magnetic materials. The adopted formulas require in addition that coils must lie in free space. Practical implications -The proposed method can help in the design of complex coils or coils systems, where the performance depends on total magnetic energy or magnetic forces among coils. Originality/value -The paper presents an original implementation in GPU-based computational environment of a procedure to compute inductances, based on the superposition of a high number of current segments. The procedure includes an original method to self-adaptively define number and position of current segments used in the coils discretization.The authors wish to thank Mr M. Nicolazzo from CREATE and Mr M. Fatica from Nvidia for fruitful discussions, and valuable hints and suggestions.

show abstract

Computation of end-winding inductances of rotating electrical machinery through three-dimensional magnetostatic integral FEM formulation

Cited by 2 publications

References 19 publications

Model refinements of transformers via a subproblem finite element method

Model refinements of transformers via a subproblem finite element method

A high-performance computing procedure for the evaluation of 3D coils inductance

Contact Info

Product

Resources

About