Stabilizing a floating disc — Analysis, field and lateral force calculation

Narukullapati, Bharath Kumar; Bhattacharya, Tapas Kumar

doi:10.1109/picc.2018.8384787

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…The magnetic fields produced due to the currents in both primary and secondary coils can be calculated as explained in [3,4]. Suppose, the disc is moved away from the coaxial axis by a small distance, 'ε' as shown in Fig.2.…”

Section: Field Calculation Due To Coil Currentsmentioning

confidence: 99%

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Modeling and simulation of Electromagnetic Fields on a Floating Aluminium

Narukullapati¹,

Bhattacharya²,

Reddy³

et al. 2018

IJET

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The electromagnetic field calculation for a floating aluminum disc is difficult to calculate since the equation involved does not produce a closed solution. The numerical, analytical, semi-analytical techniques that are already developed to find these magnetic fields have no proper mathematical formulation when the disc is disturbed from its coaxial position. The stabilization of disc is going to be effected when the disc moves away from its coaxial position due to a change in inductance between the disc and coils, due to change in magnetic flux linkage, etc. In this paper, a 2D FEM model is developed to determine the magnetic fields on a floatingaluminum disc when it is moved away from its coaxial position. The 3D FEM model developed is simulated in both COMSOL-Multiphysics and ANSYS-Electronics. The results obtained by simulation are compared, for accuracy, with the numerical solution developed earlier using Finite Difference method (FDM) and also discussed.

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Section: Field Calculation Due To Coil Currentsmentioning

confidence: 99%

“…The alternating current flowing through the two coils produce an axis-symmetric time-varying flux which links with the disc placed above the coils inducing a current in it. The field produced by these induced currents discussed in [3] has been presented here.…”

Section: Field Calculation Due To Eddy Currents On the Discmentioning

confidence: 99%

Modeling and simulation of Electromagnetic Fields on a Floating Aluminium

Narukullapati¹,

Bhattacharya²,

Reddy³

et al. 2018

IJET

Self Cite

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“…If B Z 1 is the field due to coil currents, it has two components, axial component, B Z and the radial component, B r .These components are calculated at a point (rʺ, z), where 'z' is the height from the plane of the coils. As mentioned in classical field theory [4] and also in [5,6]the components of B Z1 can be obtained as The axial component of B Z1 is,…”

Section: Magnetic Fields On Non-coaxial Discmentioning

confidence: 99%

Analysis of magnetic fields on a levitating coaxial and non-coaxial aluminum disc

Narukullapati¹,

Bhattacharya²,

P³

2018

IJET

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The electromagnetic field calculations for a levitating aluminum disc involve integro-differential equations and the solution of these equations is difficult to obtain using conventional techniques especially when the disc is coaxially away from the axis of the coils. Over the years many analytical, semi-analytical and numerical techniques have been proposed to calculate the magnetic fields on the disc when it is coaxial with the coils. In this paper, a mathematical formulation has been developed to obtain the magnetic fields on a conducting disc using a numerical technique at different positions of the levitation and for different disc discretization’s. The numerical technique developed here is based on Finite Difference Method. Since the magnetic fields on the disc are due to the coil currents and eddy currents in the disc, first a mathematical formulation is done to calculate fields due to exciting coil currents and then a numerical technique is used to calculate fields due to eddy currents on the disc. Also, the magnetic fields on the disc are calculated when the disc moves away from the axis of the coil. A MATLAB program is developed to calculate these fields.

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Determination of a stable lateral region of a floating disc – Mathematical analysis and FEM simulation

Narukullapati

Bhattacharya

2021

Alexandria Engineering Journal

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Stabilizing a floating disc — Analysis, field and lateral force calculation

Cited by 3 publications

References 12 publications

Modeling and simulation of Electromagnetic Fields on a Floating Aluminium

Modeling and simulation of Electromagnetic Fields on a Floating Aluminium

Analysis of magnetic fields on a levitating coaxial and non-coaxial aluminum disc

Determination of a stable lateral region of a floating disc – Mathematical analysis and FEM simulation

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