Macro elements in the finite element analysis of multi-conductor eddy-current problems

Szucs, Aron

doi:10.1109/20.877569

Cited by 15 publications

(11 citation statements)

References 2 publications

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“…The advancement compared to traditional sub-structuring in the elimination of inner nodes was that the eliminated region contained eddy-current carrying conductors which are equivalent to viscose damping in mechanics which is typically excluded from substructured regions. In [6,7] the eddy current carrying regions -multi-conductor windings in the slots of electrical machines -were magnetically linear and their elimination allowed for solving a non-linear magnetic iteration faster. In order to improve the computation performance the eliminated regions can be treated as macro elements.…”

Section: B Elimination Of Inner Nodesmentioning

confidence: 99%

“…A proof of concept for eddy current modeling in multi-conductor windings has been given in [6,7]. The advancement compared to traditional sub-structuring in the elimination of inner nodes was that the eliminated region contained eddy-current carrying conductors which are equivalent to viscose damping in mechanics which is typically excluded from substructured regions.…”

Section: B Elimination Of Inner Nodesmentioning

confidence: 99%

“…While the use of numerically derived macro elements in electromagnetic analysis is established and dates back more than 10 years [6,7], the use of numerical macro elements in multi-physics and system analysis is a fresh and developing research subject. When the macro element represents an electromagnetic domain in multiphysics or in a system analysis -for example an electrical machine model in a drive system -the method should be able to handle several challenges.…”

Section: Use Of Macro Elements For An Electromagnetic Domain In Mumentioning

confidence: 99%

“…[5] x Numerical macro-element -where the macro element is created by numerically eliminating the nodes inside the finite element problem region surrounded by the nodes of the macro element. [6,7] Some theoretical background / history leading to numerical macro element methods is given in the following sub chapters.…”

Section: Theoretical Background Of the Macromentioning

confidence: 99%

“…Recovery of the solution inside macro elements of the numerical macro elements representing the electrical machine (6) and the drive model (7).…”

Section: Creation Of Macro Elementsmentioning

confidence: 99%

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Macro element approach for electromagnetic simulations in multi-physics and system analysis

Szucs

2012

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion

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The paper suggests a macro element approach for considering electromagnetic field computation problems in multi-physics and system analysis. The method is derived from the standard sub-structuring approach, through the elimination of inner variables philosophy and concludes in the description of the Macro Element model. The proposed technique is an alternative for strong-indirect coupling to model the interaction between sub-domains accurately and computationally efficiently.

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Section: B Elimination Of Inner Nodesmentioning

confidence: 99%

Section: B Elimination Of Inner Nodesmentioning

confidence: 99%

Section: Use Of Macro Elements For An Electromagnetic Domain In Mumentioning

confidence: 99%

Section: Theoretical Background Of the Macromentioning

confidence: 99%

“…Recovery of the solution inside macro elements of the numerical macro elements representing the electrical machine (6) and the drive model (7).…”

Section: Creation Of Macro Elementsmentioning

confidence: 99%

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Macro element approach for electromagnetic simulations in multi-physics and system analysis

Szucs

2012

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion

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Mesh Generation

Couvat¹,

Zgainski²,

Maréchal³

2008

The Finite Element Method for Electromagnetic Modeling

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Diamond enriched lamination and winding insulation for electrical machines

Szucs

Kolondzovski

Westerlund

et al. 2019

COMPEL

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Purpose The thermal management of electrical insulations poses a challenge in electrical devices as electrical insulators are also thermal insulators. Diamond is the best solid electrical insulator and thermal conductor. This can lead to a paradigm change for electrical machine winding and lamination insulation design and thermal management. The paper introduces these techniques and discusses its effect for the design of electrical machines and its potential consequences for electromagnetic analysis, for example, in multi-physics modelling. The diamond winding insulation is patent-pending, but the diamond enriched lamination insulation is published for the benefit of the scientific community. Design/methodology/approach The windings of electrical machines are insulated to avoid contact between the coil and other conductive components, for example, the stator core. The principle of using mica tape and resin impregnation has not changed for a century and is well established to produce main insulation on a complex conductor shape and size. These insulations have poor heat-conducting properties. Similarly, the insulation of laminated steel sheets comprising the stator and rotor restrict heat flow. Diamond-based insulation provides a new path. Increased thermal conductivity means reduced temperature rise and the reduced thermal time constants in multi-physics simulations and system analysis. Findings The largest benefit of a diamond-based core insulation is in electrical machines in which the losses are conducted axially to the coolant. These are machines with radial ducts and effective cooling in the end regions. The main benefit will be in reducing the number of radial ducts that positively affect the size, production costs and the copper losses of the machine. The increased thermal conductivity of the diamond insulation system will reduce the thermal constants noticeably. These will affect system behavior and the corresponding simulation methods. Originality/value Diamond insulation can lead to a paradigm change for electrical machine winding and lamination insulation design and thermal management. It might also lead to new modeling requirements in system analysis.

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Macro elements in the finite element analysis of multi-conductor eddy-current problems

Cited by 15 publications

References 2 publications

Macro element approach for electromagnetic simulations in multi-physics and system analysis

Macro element approach for electromagnetic simulations in multi-physics and system analysis

Mesh Generation

Diamond enriched lamination and winding insulation for electrical machines

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