Measurement of Capacitance and Electrical Potential of Plural Points for Estimation of Permittivity Distribution

Okada, Shogo; Ohchi, Masashi; Furukawa, Toshiharu; Fukumoto, Hisao

doi:10.1541/ieejfms.133.173

“…The estimated results of C int + C ext are shown in Figure 10. We see that the V oL2 and C int + C ext varied due to changes in d based on Equation (5). That is, we postulate that changes in C int + C ext and the V oL2 are similar.…”

Section: Int + C Ext Combined Capacitance Estimation Resultsmentioning

confidence: 66%

“…and use the experimentally calculated V oH2 and C x of Equation (5). C ext is obtained from Equation (9).…”

Section: Int and C Ext Estimation Circuitmentioning

confidence: 99%

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Study on Estimating Electric Potential in Space between Parallel Electrodes

Tsujita

¹

,

Ohchi

²

,

Wakimoto

³

2018

IEEJ Trans. FM

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0

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We have been studying on estimating distribution of permittivity between measurement electrodes using capacitance and electric potential. Two arc electrodes were separated by long distance and there electrodes were surrounded by additional electrodes respectively. In past research work, we carried out numerical electric analysis for calculating the capacitance and electric potential using Finite Element Method (FEM) and compared with experimental and numerical results. The capacitance values were almost agreed with experimental and numerical results. However, the electric potential values were different between experimental and numerical results in conventional studies. In this paper, we proposed an equivalent circuit including the stray capacity and measurement method for capacitance, the electric potential in space between long distance electrodes was estimated. K E Y W O R D Sestimating electric potential in space, long distance electrode, permittivity distribution, shunt capacitor Electr Eng Jpn. 2019;208:17-26.

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“…We have carried out numerous studies on estimating the internal permittivity distribution of subjects based on the spatial potential measured together with the capacitance. In traditional electromagnetics, it is thought that changing the position of the dielectric placed between there is the electrodes of a parallel plate capacitor has no influence on capacitance.…”

Section: Introductionmentioning

confidence: 99%

Study on estimating electric potential in space between parallel electrodes

Tsujita

¹

,

Ohchi

²

,

Wakimoto

³

2019

Electrical Engineering Japan

Self Cite

0

View full text Add to dashboard Cite

We have been studying on estimating distribution of permittivity between measurement electrodes using capacitance and electric potential. Two arc electrodes were separated by long distance and there electrodes were surrounded by additional electrodes respectively. In past research work, we carried out numerical electric analysis for calculating the capacitance and electric potential using Finite Element Method (FEM) and compared with experimental and numerical results. The capacitance values were almost agreed with experimental and numerical results. However, the electric potential values were different between experimental and numerical results in conventional studies. In this paper, we proposed an equivalent circuit including the stray capacity and measurement method for capacitance, the electric potential in space between long distance electrodes was estimated.

show abstract

“…In the past research, the capacitance of a target object having non-uniform permittivity is measured from its periphery, and the permittivity distribution inside the object is estimated by extrapolation [2][3][4][5][6][7][8][9][10]. In those studies, not only measurement experiments have been conducted, but a numerical analysis of an electric field using the finite element method has been reported.…”

Section: Introductionmentioning

confidence: 99%

Study on a Measuring Method of Permittivity Distribution of Functionally Graded Material

Ohchi¹,

Konno²,

Sugaya³

et al. 2014

IJEIC

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1

0

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To improve the insulation performance of high voltage equipment, new functional materials of distributed permittivity, or the functionally graded materials (FGMs), have been developed. However, methods for measuring the permittivity distribution of these materials have yet to be established. In this study, numerical analyses have been conducted in order to investigate how the position of dielectrics in a cylindrical measurement device affects the capacitance and electric potential within the device. It has been confirmed that the capacitance and electric potential change with a varying position of the dielectrics. Therefore, it is suggested that the permittivity distribution of a given FGM can be estimated by measuring the capacitance and electric potential around it.

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Measurement of Capacitance and Electrical Potential of Plural Points for Estimation of Permittivity Distribution

Cited by 5 publications

References 7 publications

Study on Estimating Electric Potential in Space between Parallel Electrodes

Study on Estimating Electric Potential in Space between Parallel Electrodes

Study on estimating electric potential in space between parallel electrodes

Study on a Measuring Method of Permittivity Distribution of Functionally Graded Material

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