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Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Kim and C. Kim , C. Chen Published Mathematics.
Improvement in calculation of the self- and mutual inductance of thin-wall solenoids and disk coils Published on Jul 1, in IEEE Transactions on Magnetics 1. Slobodan I. Babic 20 Estimated H-index: Find in Lib. Add to Collection. The self-inductance expressions given by Yu and Han for air-core circular coils with rectangular cross sections, thin solenoids, and disk coils can be solved only by the numerical integration methods. We propose as an alternative a combined analytic and numeric approach.
The approach brings some improvement in the calculations of self-inductance of thin-wall solenoids and disk coils that can be encountered in superconducting magnetic energy storage SMES problems.
We also give a method for the calculation of mutual inductance of disk coils and of thin-wall solenoids. The results are obtained in an analytical form over the complete elliptic integrals of the first and second kind and Heuman's Lambda function. It is important to mention that the kernels of these integrals are always continuous functions on intervals of integration, so singularities are avoided. The results enable one to calculate the self-inductance and the mutual inductance of any thin air-core coil precisely and fast.
For practical applications, the results are so simple to use that we recommend them to avoid the problems of solving the singular cases. References 5 Citations Cite. New and fast procedures for calculating the mutual inductance of coaxial circular coils circular coil-disk coil.
Read Later. New analytic-numerical solutions for the mutual inductance of two coaxial circular coils with rectangular cross section in air. Babic , Cevdet Akyel. The mutual inductance of two thin coaxial disk coils in air.
Babic , References 5. New closed-form expressions for calculation of magnetic field of thin ring conductors with current-carrying in azimuthal and radial directions. In this paper new closed-forms are derived and presented to compute the three-dimensional magnetostatic field in iron-free media due to thin ring conductors with currents in the azimuthal and radial directions.
All obtained results in closed-form enable one to easily calculate the magnetic field either in regular or singular cases. They can be usefully employed to calculate the magnetic fields in more complicated geometries and may be used to evaluate the self- and mutual-inductance coefficients A new closed-form expression based on double integral computation is introduced for 3D magnetostatic fields of current-carrying solid conductors whose vector density satisfies the condition that its curl is zero.
Such a reduced expression is derived for a toroidal conductor with radial current flow, solved analytically, and used for 3D field computation. For illustration, by applying the same reduction principle, the 3D magnetic fields are computed for cylindrical and rectangular conductors with Self-inductance of air-core circular coils with rectangular cross section.
Han H-Index: 1. Using analytic integration, accurate self-inductance expressions requiring only single numerical integration for air-core circular coils with rectangular cross sections and two special cases, namely thin-wall solenoids and disk pancake coils are derived from the basic mutual-energy formula of two coaxial circular current loops.
Based upon these expressions, with integration singularities analytically treated, the self-inductance of any air-core coil can be precisely calculated by use of a Handbook of Mathematical Functions. Abramowitz H-Index: Stegun H-Index: Donald A.
McQuarrie H-Index: 2. Formulas for computing capacitance and inductance. Cited By Electromagnetic design of actively shielded MRI magnet for dedicated mice imaging. Abstract A 3.
The magnet configuration is determined by the central magnetic field strength, maximum magnetic field, magnetic field uniformity, uniformity volume, stray field, and coil costs. Linear programming was used to optimize the superconducting magnet of the MRI system.
The optimized superconducting magnet can generate a central field of 3. Brusamarello H-Index: 9. This article presents a method to estimate unknown parameters in an eddy current detection system: the magnetic coupling coefficient kbetween the probe coil and the surface of a conductive sample and also a constant Cdependent on the material and geometrical properties of the conductive target.
These parameters are defined from the analysis of the electrical equivalent model of the measurement system. Thereby, the liftoff from an ECT probe can be estimated during a scanning procedure by es Babic H-Index: In this paper, we give new formulas for calculating the self-inductance for circular coils of the rectangular cross-sections with the radial and the azimuthal current densities.
These formulas are given by the single integration of the elementary functions which are integrable on the interval of the integration. From these new expressions, we can obtain the special cases for the self-inductance of the thin-disk pancake and the thin-wall solenoids that confirm the validity of this approach.
For t A superconducting gravimeter based on the superconducting quantum interference device system is under development. As the main source of low-frequency noise, temperature fluctuations affect the resolution of superconducting gravimeters. In this study, a set of experimental devices was built to investigate the primary coupling processes of temperature fluctuations in superconducting gravimeters.
Under the temperature modulation method, the effects of temperature fluctuations can be expressed as d This article presents the design, fabrication, and evaluation of miniature magnetic resonance MR compatible wireless markers, which can provide three-dimensional 3-D positional tracking under magnetic resonance imaging MRI. To achieve the small size of such markers, rectangular spiral planar coils were stacked in multiple layers, which can be fabricated on a flexible printed circuit board.
Finite-element-based simulations and analytical modeling were applied to ensure the proper adjustment Measurements of the force between superconducting rings and calculation of the induced currents. Paredes University of Vigo. Domarco University of Vigo H-Index: 5. Our results show that very high currents, well above the initial ones, can be induced at short distances. In addition, it is also proved the viability of our procedur In magnetic resonance imaging MRI , pulsed magnetic gradient fields induce eddy currents in surrounding conducting components of the MRI scanner.
These eddy currents distort MRI image and introduce thermal load in cryostat. Ohmic heating of superconducting magnet due to eddy currents changes the operating temperature of magnet, which can lead to system quench.
In this paper, a coupled circuit ne This article proposed a novel scheme integrating full-duplex communication into high-power wireless power transfer systems. The power and data are transferred through the same inductive link. A pair of coupling coils with taps are employed to omit the trap inductors that are widely employed in former simultaneous wireless power and data transfer SWPDT systems.
The proposed scheme can reduce the system cost and size and improve the power transfer efficiency. The power and bidirectional data are Novel semi-analytical method for mutual inductance calculation of the thin spiral disk coils.
Accurate and fast calculation of the self and mutual inductance of coils is an important factor in system design and optimization for many applications. The methods of calculation mutual inductance between two spiral disk coils include elliptic integral solutions and coefficients in literature. In this study, a new semi-analytical method is proposed to calculate the mutual inductance between two thin disk coils without any coefficient and complex integral solutions.
For this purpose, the circula Measuring gaps using planar inductive sensors based on calculating mutual inductance. Abstract This paper presents a new method for planar inductive sensor to measure the gap between the sensor and a non-ferrite metallic target. The eddy current on the target plate is modeled as a virtual coil; the inductance change of the planar sensing coil is a result of the mutual inductance of the sensing coils and the virtual coil.
We introduce a method to calculate the gap from measured coil inductance by studying the mutual inductance between the sensing coil and the virtual coil. From ou
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Rosa Published Physics. View via Publisher.
This website uses cookies to function and to improve your experience. By continuing to use our site, you agree to our use of cookies. The mutual inductance and induced currents between a single turn primary and twenty turn secondary coil in a concentric coplanar arrangement is computed using a frequency domain model. The secondary coil is modeled using a homogenized approach which does not explicitly consider each turn of the coil. The results are compared against analytic predictions. This model example illustrates applications of this type that would nominally be built using the following products:. Furthermore, this example may also be defined and modeled using components from the following product combinations:.
particular, an inductor is a circuit element (symbol.) which has a large self- inductance. Figure Magnetic flux through the current loop. Mathematically, the.
In electromagnetism and electronics , inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it. The flow of electric current creates a magnetic field around the conductor. The field strength depends on the magnitude of the current, and follows any changes in current. From Faraday's law of induction , any change in magnetic field through a circuit induces an electromotive force EMF voltage in the conductors, a process known as electromagnetic induction. This induced voltage created by the changing current has the effect of opposing the change in current.
Self Inductance: The property of self-inductance is a particular form of electromagnetic induction. Self-inductance is defined as the induction of a voltage in a current-carrying wire when the current in the wire itself is changing. In the case of self-inductance, the magnetic field created by a changing current in the circuit itself induces a voltage in the same circuit.
Definition: Self-inductance or in other words inductance of the coil is defined as the property of the coil due to which it opposes the change of current flowing through it.
Show all documents Inductor Geometries and Inductance Calculations for Power Transfer in Biomedical Implants In this work, a low frequency method is investigated which uses the Partial In- ductance formulation [21] to compute the self and mutual inductance values for a variety of 2-D and 3-D geometries. The Partial Inductance formulation allows the evaluation of inductances for a variety of arbitrary microcircuit geometries. In general, the inductance of open loops is not a defined quantity since we typically require the flux linkage with the area enclosed by a loop to calculate inductance and the area enclosed by an open loop is not a meaningful concept [22]. The main contribution of this formulation is the establishment of a relationship between incomplete loops and closed loops, thus allowing the definition and computation of the inductance of incomplete loops. Further, it provides simplifications which allow complicated geometries to be treated with ease under certain conditions.
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Carlos Published Computer Science. The classical book by James Clerk Maxwell, "A Treatise on Electricity and Magnetism" 1 , described an interesting method for the calculation of inductances, de- rived from a method that calculates mutual inductances. This article dis- cusses the implementation, and also discusses several other formulas for inductance and mutual inductance calculation.
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ReplyImprovement in calculation of the self- and mutual inductance of thin-wall solenoids and disk coils Published on Jul 1, in IEEE Transactions on Magnetics 1.
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