Experimental and Numerical Characterization of Magnetically Anisotropic Laminations in the Direction Normal to Their Surface

Hihat, N.; Komęza, Krzysztof; Juszczak, Ewa Napieralska; Lecointe, Jean‐Philippe

doi:10.1109/tmag.2011.2158845

Cited by 15 publications

(12 citation statements)

References 12 publications

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“…So the easy magnetization direction appears in different parts of the magnetic circuit. This principle forces the magnetic flux to pass from one lamination to another, along the z axis, in order to satisfy the principle of energy minimization [10,11]. This particular circulation of magnetic flux has been confirmed by 3D Finite Element simulations [12].…”

Section: Principlementioning

confidence: 67%

Non-Segmented Grain Oriented Steel in Induction Machines

Cassoret¹,

Lopez²,

Brudny³

et al. 2014

PIER C

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Abstract-This paper presents a technique which improves energy efficiency of AC rotating machines by using Grain Oriented (GO) steel at stator core instead of Non Oriented (NO) steel. The losses of GO steel are lower than the NO ones, but only when the magnetic flux circulates along the rolling direction; consequently it is rarely used in AC machines where the magnetic flux rotates. By stacking many shifted GO laminations of AC machine stator, the flux pass from one lamination to another, and the core losses are reduced. A lot of experimentations have been done with unidirectional field, rotating field and with real induction machines. They show important improvements with GO shifted steel. The efficiency difference between a classical 10 kW induction machine and a modified machine with GO stator is more than 2 points. Moreover, the no-load current, and so the reactive power are smaller. This technique creates environmental and financial gains.

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Section: Principlementioning

confidence: 67%

Non-Segmented Grain Oriented Steel in Induction Machines

Cassoret¹,

Lopez²,

Brudny³

et al. 2014

PIER C

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“…It is quite difficult to determine experimentally the magnetic permeability μ ⊥ = μ ⊥r μ 0 of the electrical steel in the direction of the normal flux Ф n . According to the results reported in [19]- [21], the relative permeability μ ⊥r has a value in the range between 30 to 170. The dynamics process of magnetisation reversal occurs under the condition of a severe skin effect at the damping factor ξ > 4.…”

Section: Analysis Of Power Loss Produced By Normal Fluxmentioning

confidence: 90%

Analysis and Experiential Verification of Power Loss in Joint Area of Laminated Transformer Core

Kalinin

Chivenkov

Vagapov

et al. 2021

2021 56th International Universities Power Engineering Conference (UPEC)

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This paper discusses the processes of power loss development in the joint area of the laminated transformer core due to eddy currents produced by the normal magnetic flux. Normal magnetic flux is directed in perpendicular to the plane of the laminations and the dominating factor in the power loss formation in the joint area. The analytical approach was verified by a set of tests where two experimental setups have been employed to investigate power loss in the laminations under various conditions. The tests provided data on the power loss produced by the normal flux in relation to the lamination width and lamination overlap length. It was shown that the power loss in the joint area significantly depends on the lamination width and is independent of lamination overlap.

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“…These magnetic characteristics were determined by the measurements on standardised Epstein frame. Also, the magnetic characteristics in the Normal Direction (ND) defined into the Z axis normal to the plane of the sheet is deduced by a specific test bench [4,11].…”

Section: Finite Element Analysis 41 General Considerationsmentioning

confidence: 99%

The use of segmented-shifted grain-oriented sheets in magnetic circuits of small AC motors

et al. 2019

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In order to increase energy efficiency of AC rotating machines, one possibility is the use of Grain-Oriented steel sheets to build stator magnetic circuits in order to reduce iron losses. After presenting the general concept considering a non-segmented-shifted sheets prototype recently developed in our laboratory, a segmented structure is introduced. Experimental comparisons between these structures are performed using static machines. The main results are analysed using Finite Element modelling that leads to extract the particular physical concepts which govern these associations.

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Experimental and Numerical Characterization of Magnetically Anisotropic Laminations in the Direction Normal to Their Surface

Cited by 15 publications

References 12 publications

Non-Segmented Grain Oriented Steel in Induction Machines

Non-Segmented Grain Oriented Steel in Induction Machines

Analysis and Experiential Verification of Power Loss in Joint Area of Laminated Transformer Core

The use of segmented-shifted grain-oriented sheets in magnetic circuits of small AC motors

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