Calculation of Single Conductor Capacitance by Estimating the Electrostatic Field

The capacitance between two terminals of a single conductor working with time-dependent signals is defined by the amount of energy stored in the electric field outside the conductor. A simple approach for calculating the capacitance is presented in this paper, which only needs the computation of an electrostatic field. The approach is derived based on two assumptions, (1) the distribution of potentials on the conductor surface is almost the same, created by a time-dependent current and a direct current flowing in the conductor, (2) the distribution of the potential created by a direct current in the conductor can be modeled by an electrostatic field, in which the conductor is replaced by a dielectric with high permittivity. The approach is only suitable for low-frequency situations, where the displacement current and the inductive electric field can be disregarded.

Download Full-text

Влияние перпендикулярного электростатического поля на вызванный аэродинамическими силами первичный распад тонкой плоской струи жидкого диэлектрика

Журнал технической физики ◽

10.21883/jtf.2019.03.47170.182-18 ◽

2019 ◽

Vol 89 (3) ◽

pp. 367

Author(s):

В.М. Коровин ◽

В.А. Кажан

Keyword(s):

Electric Field ◽

Electrostatic Field ◽

Constant Velocity ◽

Capillary Forces ◽

Liquid Interface ◽

Moderate Intensity ◽

Aerodynamic Forces ◽

High Permittivity ◽

Gas Density ◽

Capillary Constant

AbstractThe disintegration of a plane nonconductive jet of a high-permittivity liquid has been studied. The jet moves with constant velocity in a gas that is quiescent at infinity in the presence of a perpendicular electrostatic field. Initially, the boundaries of the jet are parallel to each other. Its thickness is much smaller than the capillary constant. The gas density has been included into the list of governing parameters. The case has been considered when aerodynamic forces arising from wave disturbance of the gas–liquid interface make a greater contribution to the dynamics of the liquid than capillary forces. It has been shown that when the jet is aerodynamically unstable, the application of a perpendicular electric field with moderate intensity considerably decreases fragments of the jet after disintegration.

Download Full-text

Interfacial Built-In Electric Field-Driven Direct Current Generator Based on Dynamic Silicon Homojunction

Research ◽

10.34133/2020/5714754 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9

Author(s):

Yanghua Lu ◽

Qiuyue Gao ◽

Xutao Yu ◽

Haonan Zheng ◽

Runjiang Shen ◽

...

Keyword(s):

Electric Field ◽

Direct Current ◽

Current Density ◽

Low Frequency ◽

Current Generator ◽

Carrier Distribution ◽

Device Structures ◽

Higher Carrier Mobility ◽

The Internet Of Things

Searching for light and miniaturized functional device structures for sustainable energy gathering from the environment is the focus of energy society with the development of the internet of things. The proposal of a dynamic heterojunction-based direct current generator builds up new platforms for developing in situ energy. However, the requirement of different semiconductors in dynamic heterojunction is too complex to wide applications, generating energy loss for crystal structure mismatch. Herein, dynamic homojunction generators are explored, with the same semiconductor and majority carrier type. Systematic experiments reveal that the majority of carrier directional separation originates from the breaking symmetry between carrier distribution, leading to the rebounding effect of carriers by the interfacial electric field. Strikingly, NN Si homojunction with different Fermi levels can also output the electricity with higher current density than PP/PN homojunction, attributing to higher carrier mobility. The current density is as high as 214.0 A/m2, and internal impedance is as low as 3.6 kΩ, matching well with the impedance of electron components. Furthermore, the N-i-N structure is explored, whose output voltage can be further improved to 1.3 V in the case of the N-Si/Al2O3/N-Si structure, attributing to the enhanced interfacial barrier. This approach provides a simple and feasible way of converting low-frequency disordered mechanical motion into electricity.

Download Full-text

Transient Response of Electrostatic Field due to Collision ESD between Spherical Electrodes by using Bare-chip Optical Electric Field Sensor

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.140.599 ◽

2020 ◽

Vol 140 (12) ◽

pp. 599-600

Author(s):

Kento Kato ◽

Ken Kawamata ◽

Shinobu Ishigami ◽

Ryuji Osawa ◽

Takeshi Ishida ◽

...

Keyword(s):

Electric Field ◽

Transient Response ◽

Electrostatic Field ◽

Electric Field Sensor ◽

Field Sensor

Download Full-text

Development of a Low Frequency Electric Field Probe Integrating Data Acquisition and Storage

IEICE Transactions on Electronics ◽

10.1587/transele.2019ecp5054 ◽

2020 ◽

Vol E103.C (8) ◽

pp. 345-352

Author(s):

Zhongyuan ZHOU ◽

Mingjie SHENG ◽

Peng LI ◽

Peng HU ◽

Qi ZHOU

Keyword(s):

Electric Field ◽

Data Acquisition ◽

Low Frequency ◽

Frequency Electric Field ◽

Electric Field Probe ◽

And Storage

Download Full-text

PEMANFAATAN RADIASI ENERGI TEGANGAN 150 KV UNTUK LAMPU LED PENERANGAN JALAN

Jurnal Teknik ◽

10.31000/jt.v7i1.936 ◽

2018 ◽

Vol 7 (1) ◽

Author(s):

Mauludi Manfaluthy

Keyword(s):

Magnetic Field ◽

Electric Field ◽

High Voltage ◽

Low Frequency ◽

Energy Utilization ◽

World Health ◽

Electromagnetic Signals ◽

Health Organization ◽

The Magnetic Field ◽

Low Frequency Waves

WHO (World Health Organization) concludes that not much effect is caused by electric field up to 20 kV / m in humans. WHO standard also mentions that humans will not be affected by the magnetic field under 100 micro tesla and that the electric field will affect the human body with a maximum standard of 5,000 volts per meter. In this study did not discuss about the effect of high voltage radiation SUTT (High Voltage Air Channel) with human health. The research will focus on energy utilization of SUTT radiation. The combination of electric field and magnetic field on SUTT (70-150KV) can generate electromagnetic (EM) and radiation waves, which are expected to be converted to turn on street lights around the location of high voltage areas or into other forms. The design of this prototype works like an antenna in general that captures electromagnetic signals and converts them into AC waves. With a capacitor that can store the potential energy of AC and Schottky diode waves created specifically for low frequency waves, make the current into one direction (DC). From the research results obtained the current generated from the radiation is very small even though the voltage is big enough.Keywords : Radiance Energy, Joule Thief, and LED Module.

Download Full-text

Effects of Space Charge on ESEM Gas Amplification

Microscopy and Microanalysis ◽

10.1017/s1431927600009934 ◽

1997 ◽

Vol 3 (S2) ◽

pp. 609-610 ◽

Cited By ~ 1

Author(s):

B.L. Thiel ◽

M.R. Hussein-Ismail ◽

A.M. Donald

Keyword(s):

Electric Field ◽

Electrostatic Field ◽

Secondary Electron ◽

Sample Surface ◽

Cascade Process ◽

Secondary Electrons ◽

Positive Ions ◽

Space Charges ◽

Cascade Amplification ◽

Environmental Sem

We have performed a theoretical investigation of the effects of space charges in the Environmental SEM (ESEM). The ElectroScan ESEM uses an electrostatic field to cause gas cascade amplification of secondary electron signals. Previous theoretical descriptions of the gas cascade process in the ESEM have assumed that distortion of the electric field due to space charges can be neglected. This assumption has now been tested and shown to be valid.In the ElectroScan ESEM, a positively biased detector is located above the sample, creating an electric field on the order of 105 V/m between the detector and sample surface. Secondary electrons leaving the sample are cascaded though the gas, amplifying the signal and creating positive ions. Because the electrons move very quickly through the gas, they do not accumulate in the specimen-to-detector gap. However, the velocity of the positive ions is limited by diffusion.

Download Full-text

Vacuum radiation induced by time dependent electric field

Physics Letters B ◽

10.1016/j.physletb.2017.01.076 ◽

2017 ◽

Vol 767 ◽

pp. 431-436 ◽

Cited By ~ 2

Author(s):

Bo Zhang ◽

Zhi-meng Zhang ◽

Wei Hong ◽

Shu-Kai He ◽

Jian Teng ◽

...

Keyword(s):

Electric Field ◽

Time Dependent ◽

Radiation Induced ◽

Vacuum Radiation

Download Full-text

Landau problem with a general time-dependent electric field

Annals of Physics ◽

10.1016/j.aop.2008.08.005 ◽

2009 ◽

Vol 324 (1) ◽

pp. 97-105 ◽

Cited By ~ 7

Author(s):

J. Chee

Keyword(s):

Electric Field ◽

Time Dependent ◽

General Time

Download Full-text

Dynamic Line Rating—An Effective Method to Increase the Safety of Power Lines

Applied Sciences ◽

10.3390/app11020492 ◽

2021 ◽

Vol 11 (2) ◽

pp. 492

Author(s):

Levente Rácz ◽

Bálint Németh

Keyword(s):

Expert System ◽

Electric Field ◽

High Voltage ◽

Low Frequency ◽

Power Line ◽

Power Lines ◽

Design Parameters ◽

Monitoring Methods ◽

Limit Value ◽

Potential Applications

Exceeding the electric field’s limit value is not allowed in the vicinity of high-voltage power lines because of both legal and safety aspects. The design parameters of the line must be chosen so that such cases do not occur. However, analysis of several operating power lines in Europe found that the electric field strength in many cases exceeds the legally prescribed limit for the general public. To illustrate this issue and its importance, field measurement and finite element simulation results of the low-frequency electric field are presented for an active 400 kV power line. The purpose of this paper is to offer a new, economical expert system based on dynamic line rating (DLR) that utilizes the potential of real-time power line monitoring methods. The article describes the expert system’s strengths and benefits from both technical and financial points of view, highlighting DLR’s potential for application. With our proposed expert system, it is possible to increase a power line’s safety and security by ensuring that the electric field does not exceed its limit value. In this way, the authors demonstrate that DLR has other potential applications in addition to its capacity-increasing effect in the high voltage grid.

Download Full-text