One-sided fluxes in planar, cylindrical, and spherical magnetized structures

Shute, H.A.; Mallinson, John C.; Wilton, D.T.; Mapps, D.J.

doi:10.1109/20.825805

Cited by 48 publications

(27 citation statements)

References 13 publications

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“…The rotation of the magnets can create both a propulsion force in addition to suspension force [4,5]. In order to create a large lift force a flux-focusing Halbach rotor [6][7][8], as shown in Figure 2, can be used.…”

Section: Introductionmentioning

confidence: 99%

Modeling the Dynamic Electromechanical Suspension Behavior of an Electrodynamic Eddy Current Maglev Device

Paudel¹,

Bird²

2013

PIER B

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Abstract-A 2-D analytic based eddy-current transient model for a conducting plate is derived that is capable of accounting for continuous changes in the input conditions. Only the source field on the surface of the conducting plate needs to be known. In addition, a 2-D steady-state analytic based eddy-current model that is capable of accounting for frequency and velocity changes in two directions is derived. Both analytic based models have been validated using finite element code. The transient and steady-state models are integrated into an electromechanical system where the magnetic source is a Halbach rotor. The accuracy of both calculation methods is compared. The stiffness and damping coefficients are derived using the steadystate model.

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Section: Introductionmentioning

confidence: 99%

Modeling the Dynamic Electromechanical Suspension Behavior of an Electrodynamic Eddy Current Maglev Device

Paudel¹,

Bird²

2013

PIER B

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“…Using the given magnetization for the structure (i.e., (3)) together with necessary boundary conditions the scalar potential can be found to be [15] φ above = 0…”

Section: Magnetic Field From Single Halbach Arraymentioning

confidence: 99%

On the Optimization of Halbach Arrays as Energy Storage Media

Månsson¹

2015

PIER B

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Abstract-In the paper presented here the optimization of Halbach arrays as storage media for mechanical potential energy is investigated with numerical simulations using FEMM and analytical calculations using the Maxwell stress tensor. Two opposing Halbach arrays form a "magnetic spring" and mechanical potential energy is stored when this structure is compressed. It is here seen that the wavelength of the magnetization in the material and the dimensions greatly influence the stored energy density. A clear region of maximum is identified which leads to important conclusions on how the material should be employed. The suggested approach for storing energy have advantages and approximately 250 kJ/m 3 can be reached. The main drawback is the large prize of rare earth metals such as Neodymium.

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“…9,10 The basis for the design of a hollow cylindrical permanent magnet array ͑HCPMA͒ originates from the rotation theorem of Halbach.…”

Section: Magnetic Field Sourcementioning

confidence: 99%

Permanent magnet array for the magnetic refrigerator

Lee

Kenkel

Pecharsky

et al. 2002

Journal of Applied Physics

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Recent research into the development of magnetic refrigeration (MR) operating at room temperature has shown that it can provide a reliable, energy-efficient cooling system. To enhance the cooling power of the magnetic refrigerator, it is required to use a magnetic refrigerant material with large magnetocaloric effect (MCE) at the appropriate temperature. Most advanced magnetic refrigerant materials show largest MCE at high applied magnetic fields generated by a superconducting magnet. For application of MCE to air conditioners or household refrigerators, it is essential to develop a permanent magnet array to form a compact, strong, and energy-efficient magnetic field generator. Generating a magnetic field well above the remanence of a permanent magnetmaterial is hard to achieve through conventional designs. A permanent magnet array based on a hollow cylindrical flux source is found to provide an appropriate geometry and magnetic field strength for MR applications. Keywords Magnetic fields, Permanent magnets, Magnetic materials, Refrigerators, Magnetoresistance Disciplines Electromagnetics and Photonics CommentsThe following article is from Journal of Applied Physics 91 (2002) Recent research into the development of magnetic refrigeration ͑MR͒ operating at room temperature has shown that it can provide a reliable, energy-efficient cooling system. To enhance the cooling power of the magnetic refrigerator, it is required to use a magnetic refrigerant material with large magnetocaloric effect ͑MCE͒ at the appropriate temperature. Most advanced magnetic refrigerant materials show largest MCE at high applied magnetic fields generated by a superconducting magnet. For application of MCE to air conditioners or household refrigerators, it is essential to develop a permanent magnet array to form a compact, strong, and energy-efficient magnetic field generator. Generating a magnetic field well above the remanence of a permanent magnet material is hard to achieve through conventional designs. A permanent magnet array based on a hollow cylindrical flux source is found to provide an appropriate geometry and magnetic field strength for MR applications.

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One-sided fluxes in planar, cylindrical, and spherical magnetized structures

Cited by 48 publications

References 13 publications

Modeling the Dynamic Electromechanical Suspension Behavior of an Electrodynamic Eddy Current Maglev Device

Modeling the Dynamic Electromechanical Suspension Behavior of an Electrodynamic Eddy Current Maglev Device

On the Optimization of Halbach Arrays as Energy Storage Media

Permanent magnet array for the magnetic refrigerator

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