Stray capacitances of single-layer air-core inductors for high-frequency applications

Grandi, Gabriele; Kazimierczuk, Marian K.; Massarini, A.; Reggiani, Ugo

doi:10.1109/ias.1996.559246

Cited by 36 publications

(19 citation statements)

References 2 publications

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“…The case considered in [5] regards inductors with an external shield and is not applicable to the present problem, as it was evident by inspection of the curves behavior, opposite to Medhurst findings and to what has been observed experimentally.…”

Section: Stray Capacitance Measurementmentioning

confidence: 73%

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Measuring the Stray Capacitance of Solenoids with a Transmitting and a Receiving Coil

Mariscotti¹

2011

Metrology and Measurement Systems

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Air core solenoids, possibly single layer and with significant spacing between turns, are often used to ensure low stray capacitance, as they are used as part of many sensors and instruments. The problem of the correct estimation of the stray capacitance is relevant both during design and to validate measurement results; the expected value is so low to be influenced by any stray capacitance of the external measurement instrument. A simplified method is proposed that does not perturb the stray capacitance of the solenoid under test; the method is based on resonance with an external capacitor and on the use of a linear regression technique.

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Section: Stray Capacitance Measurementmentioning

confidence: 73%

“…There are a few references where closed form expressions and some measurement results are presented [5]- [7], with limited agreement between the presented results. Moreover, the case of wide separation between adjacent turns is rarely treated accurately enough.…”

Section: Stray Capacitance Measurementmentioning

confidence: 99%

Measuring the Stray Capacitance of Solenoids with a Transmitting and a Receiving Coil

Mariscotti¹

2011

Metrology and Measurement Systems

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“…The skin and proximity effects lead to reduction of coil inductance. The parasitic capacitors are not negligible at high frequencies [28]. The skin effect leads to an internal magnetic field in a conductive wire.…”

Section: Skin Effect At High Frequenciesmentioning

confidence: 99%

Electromagnetic Analysis of Different Geometry of Transmitting Coils for Wireless Power Transmission Applications

Haerinia¹,

Mosallanejad²,

Afjei³

2016

PIER M

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Abstract-Inductive power transfer is recently a common method for transferring power. This technology is developing as the modern technologies need to get more efficient and updated. The power transfer efficiency has potential to get better. There are different ways to achieve a desirable efficiency. In this paper, a suitable geometry of a coil for transferring power as a transmitting coil is examined. In this work, three types of geometries are designed. Frequency analysis at frequency range (10 kHz-50 kHz) is done to investigate behaviour of various geometries. Magnetic field, electric field, magnetic flux density, and current density for various geometries are presented and compared. Magnetic flux density is measured via an experimental setup and is compared to simulated one to verify the validity of simulation results.

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“…This capacitance realized at the terminals of an inductor is collectively called the distributed capacitance of the coil. This distributed capacitance introduces dielectric losses which can be modeled by adding a frequency-dependent series resistance to the inductor as discussed in Shishan et al (2010) and Grandi et al (1996). The frequency-dependent complex impedance Z(w) of this model is given below:…”

Section: Wired Characterization Of Micro Coilsmentioning

confidence: 99%

“…Simplified non-ideal micro coil electrical model (Grandi et al, 1996;Naishadham, 2011). with the angular frequency w = 2π f . The impedance model (2) is split in realZ r and imaginary Z i parts as follows:…”

Section: Wired Characterization Of Micro Coilsmentioning

confidence: 99%

Near-field wireless sensing of single and multiple open-ended micro coils

Yousaf

Boccard

Khan

et al. 2013

J. Sens. Sens. Syst.

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Abstract. In this work we present near-field wireless sensing of single and multiple open-ended micro coils using an electrically small loop antenna. Wirelessly characterized parameters of open-ended micro coils include its resonance frequency, quality factor and inductance. Moreover a wireless frequency-dependent analytical model was developed. Micro coil inductance was extracted from the wirelessly measured signal using a constraint-based least-squares approach. Wireless measurements and analytical fit of micro coils are in strong agreement which validates the analytical model. Finite element method (FEM) simulations of the coupled system were done in COMSOL Multiphysics.

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Stray capacitances of single-layer air-core inductors for high-frequency applications

Cited by 36 publications

References 2 publications

Measuring the Stray Capacitance of Solenoids with a Transmitting and a Receiving Coil

Measuring the Stray Capacitance of Solenoids with a Transmitting and a Receiving Coil

Electromagnetic Analysis of Different Geometry of Transmitting Coils for Wireless Power Transmission Applications

Near-field wireless sensing of single and multiple open-ended micro coils

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