Computation of force density inside the channel of an electromagnetic pump by Hermite projection

Takorabet, Noureddine

doi:10.1109/tmag.2005.863085

Cited by 14 publications

(2 citation statements)

References 9 publications

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“…A Lagrangian formulation allows us to express field equations in a frame of reference linked to the stator armature. Due to the smooth geometry of the secondary, no diffraction occurs and, therefore, all the physical quantities have the same time frequency [23,24]. The eddy currents in the secondary (conductive plate) are due to movement (𝑣 × 𝐵) and transformation ( 𝑑 𝑑𝑡 ) terms.…”

Section: A Model 1: Single Harmonicmentioning

confidence: 99%

Space Harmonics Effects on Performances of Linear Induction Motors: Modelization and Characterization

Bensehila,

Bouzidi,

Takorabet

2023

Actuators

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This article presents the impact analysis of space harmonics’ presence on a single-sided three-phase linear induction motor, along with a comprehensive parametric investigation. The presence of space harmonics often reduces the linear induction motor’s performance. The electromagnetic phenomena are governed by Maxwell’s equations. The chosen mathematical model uses a 2D formulation with magnetic vector potential. The model implementation is performed using the finite element method on the free Gmsh-GetDP platform. The electromagnetic thrust is calculated in the current excitation case using two numerical models of the finite element method with and without term-generating space harmonics in order to highlight their effect. The adaptation to voltage supply operation is obtained via equivalent electric circuits through the calculation of the operational impedance. The choice of the machine’s parameters by the designer in order to enhance its performance or reduce energy consumption is a difficult task. The analysis and the determination of the dependence of the parameters and the performance are necessary. The main objectives of this study are to determine this dependency and to analyze the space harmonic impact of the linear induction motor’s parameters on its performances. A comparative exploration of space harmonics’ presence using two numerical models (single and multiharmonics) and an assessment of the parametric effect of space harmonics’ presence on various machine characteristics such as thrust, efficiency, and power factor have been carried out. The motor’s characteristics (i.e., thrust, efficiency, and power factor) strongly depend on parameters such as the pole pair number and conductivity. Improving the operation and maximizing the performance of such a machine for a given specification requires the use of optimization algorithms. Motor characteristics (thrust, efficiency, and power factor) are highly dependent on parameters such as the number of pole pairs and conductivity.

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Section: A Model 1: Single Harmonicmentioning

confidence: 99%

Space Harmonics Effects on Performances of Linear Induction Motors: Modelization and Characterization

Bensehila,

Bouzidi,

Takorabet

2023

Actuators

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“…The figures (7-9), represent respectively, the equipotential lines, the distribution of the vector potential The figures (10), (11), (15) and (16), represent respectively the variation of the current density and the electromagnetic force in two cases linear and nonlinear.…”

Section: A Linear Casementioning

confidence: 99%

Numerical modeling of the electromagnetic model of an annular induction MHD pump by the finite volume method

Bergoug

Kadid

Abdessemed

2008

2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion

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This paper deals with 2D modelisation of an annular induction MHD pump using finite volume method in cylindrical coordinates taking into account the saturation of the ferromagnetic material. The different characteristics such as the distributions of the vector potential, magnetic induction, current density and the electromagnetic force are presented. Index Terms--Annular channel, induction pump, magnetohydrodynamic (MHD), saturation of the ferromagnetic material, Maxwell equations, finite volume method. I. NOMENCLATUREA ur : Magnetic vector potential [Tm], B ur : Magnetic induction [T], D uu r : Electric flux density [A/m 2 ], E ur : Electric field [V/m], J ur : Electric conduction current density [A/m 2 ], ( ex in J J J = + ur uuur uuu r ) in J uuur : Induced current density [A/m 2 ], ex J uuur : Electrical current density source density [A/m 2 ], H uur : Magnetic field [A/m 2 ], σ : Electric conductivity [(Ωm) -1 ], µ : Permeability magnetic [H/m], ϑ : Components of the velocity. II. INTRODUCTIONLinear induction machines use a sliding magnetic field wave created by polyphase currents. The most well known device working on this principle is the Linear Induction Motor (LIM) such as developed for ground transportation. There is also another type of linear inductor whose application belongs to the field of MagnetoHydroDynamics(MHD); e.g. the electromagnetic pumps used for liquid metals such as the cooling sodium of fast breeder reactors or cast iron for metallurgical applications [1], [2], [3].The interaction of moving conducting fluids with electric and magnetic fields provides for a rich variety of phenomena associated with electro-fluid-mechanical energy conversion. The advantage of these pumps which ensure the energy transformation is the absence of moving parts [4].The pumping of liquid metal may use an electromagnetic device, which induces currents in the metal. These induced currents and their associated magnetic field generate the Lorentz force whose effect can be ensure the pumping of the liquid metal [5], [6].The goal of this work is the study of the 2D electromagnetic phenomena in a MHD pump by the finite volume method in harmonic mode. Different characteristics of the MHD pump (vector potential, magnetic induction, currents density and the electromagnetic force) are given. III. DESCRIPTION OF INDUCTION MHD PUMPThe electromagnetic pump for a liquid metal is considered. A schematic view of the pump is shown in fig.1.The liquid metal flows along a channel with a cylindrical geometry of annular cross section. A ferromagnetic core is placed on the inner and the outer side of the channel [2].The principle of fonctionnement of the MHD pump ( Fig.1) is similar to that of the asynchronous motor; the alimentation of the inductor creates a magnetic field B r sliding with the velocity of synchronism, where electric currents are induced in the liquid metal by means of a magnetic field, producing an electromagnetic force B J ∧ with the instantaneous field ensuring the flows of the fluid, [7].The currents of the windi...

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Design analysis of DC electromagnetic pump for liquid sodium–CO2 reaction experimental characterization

Lee

Kim

2017

Annals of Nuclear Energy

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Computation of force density inside the channel of an electromagnetic pump by Hermite projection

Cited by 14 publications

References 9 publications

Space Harmonics Effects on Performances of Linear Induction Motors: Modelization and Characterization

Space Harmonics Effects on Performances of Linear Induction Motors: Modelization and Characterization

Numerical modeling of the electromagnetic model of an annular induction MHD pump by the finite volume method

Design analysis of DC electromagnetic pump for liquid sodium–CO2 reaction experimental characterization

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