Gotowe bibliografie tematyczne / High voltages in art

Gotowa bibliografia na temat „High voltages in art”

Autor: Grafiati
Data publikacji: 27 lipca 2024
Data aktualizacji: 28 lipca 2024

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Artykuły w czasopismach na temat "High voltages in art"

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Singh, R., S. Creamer, E. Lieser, S. Jeliazkov i S. Sundaresan. "HIGH TEMPERATURE ULTRA HIGH VOLTAGE SIC THYRISTORS". Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2010, HITEC (1.01.2010): 000167–73. http://dx.doi.org/10.4071/hitec-rsingh-tp25.

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Through a systematic study, Silicon Carbide Gate Turn Off (GTO) Thyristors with record performance are demonstrated. Several Anode-Gate interdigitation schemes (raster, hex and involute) were explored to investigate their effect on the static as well as switching characteristics. An optimized edge-termination was employed that resulted in the achievement of near-theoretical forward blocking voltages (>8.1kV), and high yields (>60% on 8mm×8mm) on GTO Thyristors with 60μm/5×1014 cm−3 voltage-blocking epitaxial layers. A low differential specific on-resistance of 2.55 mΩ-cm2, and low on-state voltage drop were measured at 500 A/cm2. High Temperature forward I-V and reverse I-V characteristics show extremely stable performance with temperature, in contrast to state-of-the-art Si GTO Thyristors. Turn-on transient characteristics show a stable delay time of about 400 nano-seconds, and a rise-time that decreases with increasing temperature. Detailed high temperature turn-off measurements conducted using Anode-Switched mode was used to extract the value of minority carrier lifetimes as a function of temperature for the first time.
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Irace, Andrea, Vincenzo d'Alessandro, Giovanni Breglio, Paolo Spirito, Andrea Bricconi, Rossano Carta, Diego Raffo i Luigi Merlin. "Electrothermal Issues in 4H-SiC 600 V Schottky Diodes in Forward Mode: Experimental Characterization, Numerical Simulations and Analytical Modelling". Materials Science Forum 527-529 (październik 2006): 1151–54. http://dx.doi.org/10.4028/www.scientific.net/msf.527-529.1151.

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The electrothermal behavior of 4H-SiC 600 V Schottky diodes operated in forward mode is analyzed through numerical and analytically-based simulations. It is shown that the unexpected occurrence of voltage surges systematically detected in state-of-the-art devices is a thermally-induced effect due to the compound contribution of a) the negative temperature coefficient of the forward current at high voltages and b) the relatively high package-to-ambient thermal resistance. As a main result, it is demonstrated that the proposed approaches are suitable to accurately predict the value of a “critical” current density beyond which voltage surges may arise.
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Centurelli, Francesco, Riccardo Della Sala, Pietro Monsurrò, Giuseppe Scotti i Alessandro Trifiletti. "A Tree-Based Architecture for High-Performance Ultra-Low-Voltage Amplifiers". Journal of Low Power Electronics and Applications 12, nr 1 (17.02.2022): 12. http://dx.doi.org/10.3390/jlpea12010012.

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In this paper, we introduce a novel tree-based architecture which allows the implementation of Ultra-Low-Voltage (ULV) amplifiers. The architecture exploits a body-driven input stage to guarantee a rail-to-rail input common mode range and body-diode loading to avoid Miller compensation, thanks to the absence of high-impedance internal nodes. The tree-based structure improves the CMRR of the proposed amplifier with respect to the conventional OTA architectures and allows achievement of a reasonable CMRR even at supply voltages as low as 0.3 V and without tail current generators which cannot be used in ULV circuits. The bias currents and the static output voltages of all the stages implementing the architecture are accurately set through the gate terminals of biasing transistors in order to guarantee good robustness against PVT variations. The proposed architecture and the implementing stages are investigated from an analytical point of view and design equations for the main performance metrics are presented to provide insight into circuit behavior. A 0.3 V supply voltage, subthreshold, ultra-low-power (ULP) OTA, based on the proposed tree-based architecture, was designed in a commercial 130 nm CMOS process. Simulation results show a dc gain higher than 52 dB with a gain-bandwidth product of about 35 kHz and reasonable values of CMRR and PSRR, even at such low supply voltages and considering mismatches. The power consumption is as low as 21.89 nW and state-of-the-art small-signal and large-signal FoMs are achieved. Extensive parametric and Monte Carlo simulations show the robustness of the proposed circuit to PVT variations and mismatch. These results confirm that the proposed OTA is a good candidate to implement ULV, ULP, high performance analog building blocks for directly harvested IoT nodes.
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Malinowski, M. "Cascaded multilevel converters in recent research and applications". Bulletin of the Polish Academy of Sciences Technical Sciences 65, nr 5 (1.10.2017): 567–78. http://dx.doi.org/10.1515/bpasts-2017-0062.

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Abstract Multilevel converters have been intensively investigated and developed since 1960s and have found successful industrial applications. The aim of this paper is to present state of the art as well as recent research and applications of cascaded multilevel converters, which are a very interesting solution for power distribution systems and renewable energy sources. Cascaded multilevel converters can easily operate at medium and high voltage based on the series connection of power modules (cells), which use standard low-voltage component configurations. Series connections of modules (cells) allow for high quality output voltages and input currents, reduction of passive components and availability of component redundancy. Due to these features the cascaded multilevel converters have been recognized as attractive solutions for high-voltage direct-current (HVDC) transmission, solid state transformers (SST) and photovoltaic (PV) systems.
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Kirchartz, Thomas. "High open-circuit voltages in lead-halide perovskite solar cells: experiment, theory and open questions". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, nr 2152 (8.07.2019): 20180286. http://dx.doi.org/10.1098/rsta.2018.0286.

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One of the most significant features of lead-halide perovskites is their ability to have comparably slow recombination despite the fact that these materials are mostly processed from solution at room temperature. The slow recombination allows achieving high open-circuit voltages when the lead-halide perovskite layers are used in solar cells. This perspective discusses the state of the art of our understanding and of experimental data with regard to recombination and open-circuit voltages in lead-halide perovskites. A special focus is put onto open questions that the community has to tackle to design future photovoltaic and optoelectronic devices based on lead-halide perovskites and other semiconductors with similar properties. This article is part of a discussion meeting issue ‘Energy materials for a low carbon future’.
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Tarter, T. S., A. Carrasco, N. Do, G. Felten, W. Nunn i J. Church. "Hashing Processors: A New Challenge for Power Package Design". International Symposium on Microelectronics 2014, nr 1 (1.10.2014): 000229–35. http://dx.doi.org/10.4071/isom-tp25.

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A new class of processors has emerged for high speed hashing of crypto-currency numerical constructs. The paper examines package design for processors with multiple cores running at full speed continuously and requiring high current supply at low voltages. The work described in this paper is focused on package design for high-current, high-power devices with emphasis on PDN structures and package development using state-of-the-art design, modeling and simulation toolsets.
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Delatte, Pierre, Aimad Saib, Etienne Vanzieleghem i Jean-Christophe Doucet. "STROMBOLI®: a new platform for Isolated DC-DC Converters with reliable operation from −55°C up to 225°C". Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, HITEN (1.01.2011): 000167–71. http://dx.doi.org/10.4071/hiten-paper6-pdelatte.

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This paper presents a new high-temperature isolated DC-DC converter platform called STROMBOLI®. It also discusses how this converter can be associated with the various solutions proposed by CISSOID for Point-of-Load (POL) regulators that can be either linear or switched mode. STROMBOLI® has been optimized to efficiently convert input voltages up to 350V into multiple output voltages up to +/−25V. As an example, in a +/−12V symmetrical output configuration, standard STROMBOLI® can deliver 25W with efficiencies up to 70% at 225°C. The galvanic isolation between input and outputs is at least 10MΩ at 500V. As the main objective of this development was to provide designers with a solution highly flexible, scalable, and easily adaptable to their specific requirements, we selected well-known and robust flyback architecture. Efficiency has been optimized thanks to synchronous rectification. However it can be replaced by a standard rectification in order to reduce the bill-of-material (BOM). A magnetic feedback provides the output voltage temperature stability and the load regulation. STROMBOLI® also includes an Under-Voltage-Lockout (UVLO) function and the pulse-by-pulse current sensing provides intrinsic output current limitation in case of overload or short-circuits. STROMBOLI® is a state-of-the-art, turnkey reference design suitable for 225°C reliable operation and is part of high temperature DC-DC converters VOLCANO family.
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Fuse, Norikazu, Shosuke Morita, Satoru Miyazaki, Toshihiro Takahashi i Naohiro Hozumi. "Estimation Accuracy of the Electric Field in Cable Insulation Based on Space Charge Measurement". Energies 15, nr 13 (5.07.2022): 4920. http://dx.doi.org/10.3390/en15134920.

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Space charge measurement accuracy is crucial when assessing the suitability of cables for high-voltage direct current (DC) systems. This study assembled state-of-the-art analysis technologies, including time-domain deconvolution, to mark electric field estimation accuracy, which the present techniques achieve. The pulse electroacoustic method was applied to a 66 kV-class extruded cable, and waveforms were obtained and analyzed to reproduce the electric field distribution. The DC voltage was set to be sufficiently low so that the analysis results can be compared with Laplace’s equation. The statistical analysis of 81 waveforms under a DC voltage of 30 kV showed that the estimation accuracy was −0.3% ± 19.9% with a 95.4% confidence interval, even with the deconvolution parameter optimized. The estimated accuracy using the “reference” waveform is applied to waveforms at higher voltages since similar estimation accuracies were confirmed for waveforms obtained under a DC voltage of 45 kV.
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Yuan, Jing, Yongheng Yang i Frede Blaabjerg. "A Switched Quasi-Z-Source Inverter with Continuous Input Currents". Energies 13, nr 6 (17.03.2020): 1390. http://dx.doi.org/10.3390/en13061390.

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Impedance source converters as single-stage power conversion alternatives can boost and regulate the output voltages of renewable energy sources. Nevertheless, they, also known as Z-source inverters (ZSIs), still suffer from limited voltage gains and higher stresses across the components. To tackle such issues, extra diodes, passive components, and active switches can be utilized in the basic ZSIs. In this paper, a modified switched-quasi-Z-source inverter (S-qZSI) is proposed, which features continuous input currents and high boosting capability to boost output voltage by minor modifications of a prior-art topology. Furthermore, the voltage stress of the active switches is reduced, which contributes to a lower cost. The operation principles are discussed comprehensively. The performance of the proposed ZSI in terms of conversion ratio, voltage gain, and stresses on the power switches and capacitors is benchmarked with selected ZSIs. Finally, simulations and experimental tests substantiate the theoretical analysis and superior performance.
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Li, Weiyao. "Analysis of the Principle and Applications for High Voltage Device Based on SiC". Highlights in Science, Engineering and Technology 76 (31.12.2023): 421–27. http://dx.doi.org/10.54097/t6wnh795.

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The field of high-voltage electronics is rapidly evolving, with a particular focus on materials and devices that can withstand high voltages and temperatures while maintaining reliable performance. Silicon Carbide (SiC) is one such material that has been gaining significant attention due to its unique physical and chemical properties. This study will delve into the principle and applications of high-voltage devices based on SiC, exploring its potential for use in a range of power electronic systems. This paper will first explore the principle of SiC high-voltage devices, including a detailed analysis of the physical and chemical processes involved in their operation. Subsequently, this study will discuss the current state-of-the-art in SiC device fabrication and characterize the resulting devices based on their performance metrics. This will be followed by a discussion on the potential applications of SiC high-voltage devices in power electronics and beyond. Finally, this study will address the current limitations in SiC device research and development and explore possible future research directions that may lead to improved performance and reliability of SiC devices. By delving into the principle and applications of high-voltage devices based on SiC, this paper aims to provide a comprehensive understanding of the material’s unique properties and its potential for use in a range of power electronic systems. The analysis of current limitations and prospects will aid in identifying areas for future research and development efforts, leading to the advancement of SiC high-voltage devices for even more demanding applications.
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Rozprawy doktorskie na temat "High voltages in art"

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Farag, Bassem. "High Voltage DC Arc Detection Model". Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-358478.

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High voltage (HV) battery systems are widely used in many applications nowadays. And due to the safety concerns regarding lithium-ion cells, the safety of the lithium-ion based battery systems is vital. One crucial danger for lithium-ion cells is heat, And as arcs formation can lead to heat generation within the system, it is important to detect arcs that take place frequently within HV battery systems. This thesis is done in cooperation with Northvolt AB and it focuses on assessing the ability to detect the occurrence of arcs in the system, but it does not focus on preventing arcs.The goal is to build a detection system to identify the occurrence of arcs, both within the battery system and in the connection between the battery system and the load (vehicle). The detection circuit should not affect the ability of the isolation measurement unit inside the system, and the detection system should be protected at all times. The circuit was designed and tested using LTSPice software. This is due to the absence of a ready system to test the circuit against at Northvolt. The system was able to detect arcs both within the battery system and when connecting the battery system to the vehicle. Additionally, as required by Northvolt, the detection system is designed without affecting the isolation measurement unit and the detection system is kept safe at all times by using an isolation circuit. Future work is recommended to generalize the detection system so it can be used in different high voltage applications. This can be done by testing the system against other HV systems and updating the filter and amplifier’s values, as well as the software thresholds. Additionally, it is recommended that the software module is calibrated against the real system during hardware testing. This calibration will optimize the software module and, thus, result in better detection.
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Gerrard, Carl Andrew. "Remote monitoring of power system conductor voltages". Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263990.

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Islas, Michael E. "Efficiency improvement techniques for high voltage capacitor carging [sic] methods". Orlando, Fla. : University of Central Florida, 2009. http://purl.fcla.edu/fcla/etd/CFE0002899.

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Young, Karl Anthony. "Development of a high voltage rotating arc SF₆ interrupter". Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428219.

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Macfarlane, Douglas James. "Design and fabrication of AlGaN/GaN HEMTs with high breakdown voltages". Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/4835/.

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Gallium nitride based transistors will make up a large portion of the power electronics and the microwave electronics sectors in the very near future, replacing traditional materials such as silicon (Si) and gallium arsenide (GaAs). The work in this thesis focuses on AlGaN/GaN high electron mobility transistors (HEMTs) in particular, with the aim of gaining the maximum potential out of them with regards to breakdown voltage. GaN based devices are able to breakdown at higher voltages compared to Si or GaAs due to its wider band gap (3.4 eV compared to 1.1 eV and 1.4 eV respectively) and although a lot of work has been invested into these devices over the last two decades or so, their full potential has yet to be realised and new solutions are still sought to provide a complete engineering solution which will make them competitive and commercially viable. One of the main obstacles is the high electric fields generated at the drain side of the gate which have prevented these devices from reaching their theoretical breakdown fileld of around 300 V/um. In an attempt to overcome this, several approaches have been investigated in this thesis including metal insulator semiconductor HEMTs (MIS-HEMTs), `gate overlapping' HEMTs, where the gate partially overlaps the source and drain contacts and finally a device employing a Schottky source and a Schottky drain contact. The results given show that a MIS-HEMT can have a substantially larger breakdown voltage compared to a Schottky gate HEMT which is clarified through qualitative simulated electric field work and experimental work. Further, the MIS-HEMT shows a high breakdown field of about 87 V/um when a Schottky drain contact is incorporated. The gate overlapping HEMTs attempts to mitigate completely the large electric field found at the drain edge of the gate. Simulated and experimental results are given for this device concept and reveal that the large electric field peak is indeed removed, however, low breakdown voltages are still incurred due to the closeness of the gate edge to the drain contact. Finally, results are given for a device employing Schottky source and Schottky drain contacts and reveals that present theory may not completely describe the operation of this device.
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Washabaugh, Andrew Patrick. "Electrokinetic pumping of semi-insulating liquids by traveling wave high voltages". Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14509.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
Includes bibliographical references (leaves 182-184).
by Andrew Patrick Washabaugh.
M.S.
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Benwell, Andrew L. Kovaleski Scott D. "A high voltage piezoelectric transformer for active interrogation". Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6847.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 23, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Scott D. Kovaleski. Vita. Includes bibliographical references.
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Aldawsari, Mohammed. "Partial Discharge Behavior on Power Module with High dv/dt Square Voltages". The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu155563114540074.

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Bandaru, Sreekanth. "Effect of high frequency pulse voltages and high temperature on the lifetime characteristics of magnet wires". Master's thesis, Mississippi State : Mississippi State University, 2004. http://library.msstate.edu/etd/show.asp?etd=etd-05132004-135217.

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Al-Busaidi, Ahmed Said Obaid. "A generator-set for series hybrid electric vehicles operating at high output voltages". Thesis, University of Newcastle Upon Tyne, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556284.

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Series hybrid electric vehicles have their wheels driven by an electric motor powered by a battery with an engine plant that cranks a generator unit to provide electric power to the battery and if necessary to the electric motor. They promise significant reductions in greenhouse gases without compromising driving performance. This year GM has launched the first mass produced series hybrid electric vehicle and other car manufacturer are to follow over the next decade. In recent years significant progress has been made in new battery techno logies, electric propulsion designs, and optimisation of power flow and control of the electric components to reduce the weight and cost. While these developments have been made successfully, little attention has been spent on improvement of the generator-set for series hybrid electric vehicles. Generally, a generator-set consists of a three-phase machine and a three-phase rectifier circuit. Conventional generator- sets suffer from significant voltage drops across the output of the rectifier circuit caused by current commutation, resulting from interaction between the machine inductances and the rectifier. Any voltage drop across the output of the rectifier circuit leads to an inefficient operation ofthe generator system. In this thesis, a new generator-set for the use in series hybrid electric vehicle applications is presented, whereby the voltage drop caused by commutation is eliminated. In a typical rectifier circuit the output voltage drop is proportional to the commutation time, which is a function of the value of the machine inductance. The novel topology operates in such a way that the commutation time becomes independent from the value of the machine inductance. This is achieved by eliminating the output de-link capacitors that are used in traditional rectifier circuits and transferring these capacitors within a new rectifier circuit. These embedded capacitors are charged and discharged simultaneously with two switches. The capacitors still have the function of electric storage but they also operate in resonance with the supply inductance.
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Książki na temat "High voltages in art"

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Kober, Katrin Nora. Blitzkontakt: Kunst im Hochspannungslabor. Graz: Verlag der TU Graz, 2014.

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Robakowski, Józef. Józef Robakowski: Baczność! Wysokie napięcie! = Józef Robakowski : High voltage! Danger! Sopot: Państwowa Galeria Sztuki, 2018.

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Stuart, Thomas A. A study of DC-DC converters with MCT's for arcjet power supplies. Cleveland, Ohio: Lewis Research Center, National Aeronautics and Space Administration, 1994.

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Stuart, Thomas A. A study of DC-DC converters with MCT's for arcjet power supplies. Cleveland, Ohio: Lewis Research Center, National Aeronautics and Space Administration, 1994.

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Stuart, Thomas A. A study of DC-DC converters with MCTs for arcjet power supplies. Toledo, Ohio: Dept. of Electrical Engineering, University of Toledo, 1993.

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Stuart, Thomas A. A study of DC-DC converters with MCTs for arcjet power supplies. Toledo, Ohio: Dept. of Electrical Engineering, University of Toledo, 1993.

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J, King Roger, Masserant Brian J i United States. National Aeronautics and Space Administration., red. A study of DC-DC converters with MCTs for arcjet power supplies. Toledo, Ohio: Dept. of Electrical Engineering, University of Toledo, 1993.

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von, Olshausen Rainer, red. Cable systems for high and extra-high voltage: Development, manufacture, testing, installation and operation of cables and their accessories. Erlangen: Publicis MCD Vlg., 1999.

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Engineers, Institution of Electrical, red. Insulators for high voltages. London, U.K: Peter Peregrinus on behalf of the Institution of Electrical Engineers, 1988.

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Wadhwa, C. L. High voltage engineering. Wyd. 2. New Delhi: New Age International (P) Ltd., Publishers, 2007.

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Części książek na temat "High voltages in art"

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Tanzawa, Toru. "Charge Pump State of the Art". W On-chip High-Voltage Generator Design, 97–114. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3849-6_3.

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Keller, Reto B. "Decibel". W Design for Electromagnetic Compatibility--In a Nutshell, 23–31. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-14186-7_3.

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AbstractThis chapter introduces the topic decibel in a compact form. Decibel is defined as the ratio of two quantities, typically power, voltage, or current. In the field of EMC, the decibel must be understood. One advantage of decibels is that a gain of 10 dB means a gain of 10 dB for current, voltage, and power likewise. This fact helps to prevent misinterpretations and helps to simplify things. This is the main reason why EMC and high-frequency system engineers like to work with decibels.This chapter assumes that values of voltages V [V], currents I [A], power P [W], electric field strengths E [V/m], and magnetic field strength H [A/m] are given as root-mean-square (RMS) values.
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Schon, Klaus. "High Impulse Voltages". W High Voltage Measurement Techniques, 79–155. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21770-9_4.

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Schon, Klaus. "High Alternating Voltages and Currents". W High Voltage Measurement Techniques, 7–42. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21770-9_2.

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Schon, Klaus. "High Direct Voltages and Currents". W High Voltage Measurement Techniques, 43–77. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21770-9_3.

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Hauschild, Wolfgang, i Eberhard Lemke. "Tests with High Alternating Voltages". W High-Voltage Test and Measuring Techniques, 81–155. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-45352-6_3.

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Hauschild, Wolfgang, i Eberhard Lemke. "Tests with High Direct Voltages". W High-Voltage Test and Measuring Techniques, 249–83. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-45352-6_6.

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Hauschild, Wolfgang, i Eberhard Lemke. "Tests with High Alternating Voltages". W High-Voltage Test and Measuring Techniques, 89–167. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97460-6_3.

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Hauschild, Wolfgang, i Eberhard Lemke. "Tests with High Direct Voltages". W High-Voltage Test and Measuring Techniques, 271–309. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97460-6_6.

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Hauschild, Wolfgang, i Eberhard Lemke. "Tests with Combined and Composite Voltages". W High-Voltage Test and Measuring Techniques, 371–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-45352-6_8.

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Streszczenia konferencji na temat "High voltages in art"

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Parks, Harold. "High Voltage Divider Calibration with the Reference Step Method". W NCSL International Workshop & Symposium. NCSL International, 2015. http://dx.doi.org/10.51843/wsproceedings.2015.22.

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High voltage DC measurements, from 10 kV up to several hundred kV, are usually traceable through resistive dividers which have a divider ratio on the order of 10 000 to 100 000. The reference step method [M.D. Early et al., IEEE Trans. Intsrum. Meas. 62, 1600 (2013)] provides a highly accurate ratiometric method of calibrating 1000 V calibrators across a wide range of voltages. We adapt this method for measuring the ratio of high voltage dividers at low (. 1000 V) voltages as a first step to establishing traceability at high voltages
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Lee, Sang-Shin, i Sang-Yung Shin. "Integrated Optical High-Voltage Sensor Based On a Polymeric Digital Optical Switch". W The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cmd2.

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The integrated optical high-voltage sensors are useful for remote fiber-optic monitoring of high voltages under the dangerous high-voltage environments including poner distribution systems, without electromagnetic interference. They have been mainly implemented utilizing lithium niobate guided-wave diveces such as Mach-Zehnder interferometric modulators, cutoff modulators [1]. However, the modulator type voltage sensors with a single output port are inevitably affected by the changes in the light source power. In this paper, we report a high-voltage sensor utixzing a polymeric Y-branch digital optical switch [2] in an electro-optic polymer. The measurement of ac high voltages is accomplished by using the linear transfer characteristics of the digital optical switch. The logarithmic ratio of optical powers of two output ports may be also used to remove the noise caused by the power fluctuations of a light source, since the logarithmic ratio is independent of the light source power and linearly proportional to applied voltages around the operating bias point. The passive polymeric high-voltage sensor requires no electrical dc biases and no voltage dividers. It is also wavelength insensitive and fabrication-tolerant since it uses the mode evolution effect instead of interference Moreover, the sensing voltage range can be easily extended by controlling the process parameters of polymeric waveguides such as poling voltage, photobleaching time, and polymer layers thickness.
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Roren, Paul Monceyron, Kristoffer Rustad i Kaveh Niayesh. "Arc Voltages of Free Burning Arc in Air and Air with Added Fluoroketone". W 2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE). IEEE, 2022. http://dx.doi.org/10.1109/ichve53725.2022.10014467.

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Donaldson, William R. "High Speed, High Repetition Rate, High Voltage Photoconductive Switching". W Picosecond Electronics and Optoelectronics. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/peo.1987.we1.

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We describe a method of producing robust silicon photconductive switches. These switches are used in high power applications where it is necessary to switch high voltages on the picosecond time scale. They have the advantage that they are activated by the bulk absorption of light in a semiconductor.1 Thus avalanching and transit time effects normally associated with high voltage switches are absent. As a result the switches have no jitter with respect to the optical pulse and very little heating due to the joule energy deposited in the switch as they turn on.2 These qualities make these switches desirable in applications which require parallelism or low thermal energy deposited in the switch. However, photoconductive switches cannot be used in practical applications until they can be proven reliable.
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Motzki, Paul, Tom Gorges, Thomas Würtz i Stefan Seelecke. "Experimental Investigation of High-Speed/High-Voltage SMA Actuation". W ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3787.

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The thermal shape memory effect describes the ability of a deformed material to return to its original shape when heated. This effect is found in shape memory alloys (SMAs) such as nickel-titanium (NiTi). SMA actuator wire is known for its high energy density and allows for the construction of compact systems. An additional advantage is the so-called “self-sensing” effect, which can be used for sensor tasks within an actuator-sensor-system. In most applications, a current is used to heat the SMA wires through joule heating. Usually a current between zero and four ampere is recommended by the SMA wire manufacturers depending on the wire diameter. Therefore, supply voltage is adjusted to the SMA wire’s electrical resistance to reach the recommended current. The focus of this work is to use supply voltages of magnitudes higher than the recommended supply voltages on SMA actuator wires. This actuation method has the advantage of being able to use industry standard voltage supplies for SMA actuators. Additionally, depending on the application, faster actuation and higher strokes can be achieved. The high voltage results in a high current in the SMA wire. To prevent the wire from being destroyed by the high current, short pulses in the micro- and millisecond range are used. As part of the presented work, a test setup has been constructed to examine the effects of the crucial parameters such as supply voltage amplitude, pulse duration, wire diameter and wire pre-tension. The monitored parameters in this setup are the wire displacement, wire current and force generated by the SMA wire. All sensors in this setup and their timing is validated through several experiments. Additionally, a highspeed optical camera system is used to record qualitative videos of the SMA wire’s behavior under there extreme conditions. This optical feedback is necessary to fully understand and interpret the measured force and displacement signals.
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Choi, Yoonsu, Kieun Kim i Mark G. Allen. "A Magnetically Actuated, Electrostatically Clamped High Current MEMS Switch". W ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/mems-23812.

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Abstract MEMS switches based on a dual actuation scheme that simultaneously allows for large standoff heights and low clamping voltages have been fabricated. The switches consist of a magnetically-driven component and an electrostatically-driven component. These devices are based on the use of a transient external magnetic field to bring the actuating portion of the switch (made of electroplated NiFe) close to a dielectric-coated clamping electrode, followed by application of an electrostatic clamping voltage to keep the switch closed. Since the clamping voltage is applied when the switch is closed, this voltage can be relatively small. This approach is particularly attractive for reconfigurable arrays of switches. Arrays of switches are simultaneously closed by the magnetic field generated by an off-substrate magnetic source. Selected switches are clamped by electrostatic force using low voltages to maintain the ON state. With this scheme, reconfigurable patterns on an array of switches are possible. These switches possess a large open state air gap (25–35 μm), and are able to pass high currents in excess of 1 A. The large OFF state impedance, then, allows for their usage in switching applications in reconfigurable aperture antennas.
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Shea, Herbert R., Carolyn D. White, Arman Gasparyan, Robert B. Comizzoli i Susanne Arney. "Anodic Oxidation and Reliability of MEMS Poly-Silicon Electrodes at High Voltages and in High Relative Humidity". W ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1114.

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Abstract We present a study of the anodic oxidation of MEMS poly-Silicon electrodes and wires in ambients with high relative humidity and high voltages. MEMS poly-Si electrodes that are hermetically packaged in dry ambients show no signs of degradation on a time scale of years even when operated at hundreds of volts. To accelerate electrical failure modes, we expose unpackaged chips to ambients with high relative humidity. We then observe anodic oxidation of the most positively biased poly-Si structures on a time scale of minutes or hours. We describe this anodic oxidation as a function of relative humidity and voltage, and its dependence on surface leakage currents.
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Benilov, M. S., L. G. Benilova, He-Ping Li i Gui-Qing Wu. "Sheath vs. quasi-neutral plasma voltages in high-pressure arc discharges". W 2012 IEEE 39th International Conference on Plasma Sciences (ICOPS). IEEE, 2012. http://dx.doi.org/10.1109/plasma.2012.6384090.

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Meinecke, H. "High voltage gas insulated switchgear: an overview". W IEE Colloquium on GIS (Gas-Insulated Switchgear) at Transmission and Distribution Voltages. IEE, 1995. http://dx.doi.org/10.1049/ic:19951264.

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Hillers, T. "Control, monitoring and diagnostics for high voltage GIS". W IEE Colloquium on GIS (Gas-Insulated Switchgear) at Transmission and Distribution Voltages. IEE, 1995. http://dx.doi.org/10.1049/ic:19951267.

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Raporty organizacyjne na temat "High voltages in art"

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King, Fraser. PR-377-113602-R01 Long-term Field Performance and Review of Failure Modes and Effects of FBE Coatings. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), kwiecień 2020. http://dx.doi.org/10.55274/r0011664.

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This report describes a review of the long-term field performance and the failure modes and effects of fusion-bonded epoxy (FBE) external pipeline coating. Field data have been obtained from various PRCI member companies and, where possible, are used to validate information obtained from the review of the technical literature. Although all potential failure modes are considered, particular attention is paid to (i) the effects of operating at temperatures greater than 150�F (65�C), (ii) the effect of cathodic protection and, especially, high CP levels, and (iii) the detection of holidays and the impact of high test voltages. It is apparent from all of the information reviewed that FBE coatings provide excellent performance, primarily because of their CP-permeability that ensures continued protection for the pipe in the event of disbondment.
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Buchler, M., H. G. Schoneich i F. Stalder. DRS04BSS Criteria to Assess the Alternating Current Corrosion Risk of Cathodically Protected Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), styczeń 2004. http://dx.doi.org/10.55274/r0011818.

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This paper addresses the assessment of the corrosion risk of a pipeline due to alternating currents. The state of the art technique is the use of coupons, which simulate a coating fault and which allow to measure the ac-current density and also to evaluate corrosion products and pits. Recently, different criteria to assess the corrosion risk have been proposed that are based on the ratio between ac- and dc-current density or the instantaneous off-potential (high-speed off-potential measurement) measured on a coupon. Furthermore, the charge needed to oxidize corrosion products (under alkaline conditions) on a corroded steel surface indicates the level of metal loss. These criteria are discussed on the basis of field experience from coupons and from alternating current-corrosion pits on high voltage interfered pipelines. Results from long term laboratory corrosion measurements under constant AC and DC load are presented which indicate that not only a reduction of pipe/ground AC potential but also a careful adjustment of cathodic protection level helps to minimize a.c. corrosion rates. Based on the results from cyclic potentiodynamic experiments under alkaline conditions, a basic model explaining AC corrosion on cathodically protected pipelines has been developed.
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Khan, Asad, Angeli Jayme, Imad Al-Qadi i Gregary Renshaw. Embedded Energy Harvesting Modules in Flexible Pavements. Illinois Center for Transportation, kwiecień 2024. http://dx.doi.org/10.36501/0197-9191/24-008.

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Energy from pavements can be harvested in multiple ways to produce clean energy. One of the techniques is electromagnetic energy harvesting, in which mechanical energy from vehicles is captured in the form of input displacement to produce electricity. In this study, a rack-and-pinion electromagnetic energy harvester proposed in the literature as a speed bump is optimized for highway-speed vehicles. A displacement transfer plate is also proposed, with a minimum depth of embedment in the pavement to carry input displacements from passing vehicles and excite the energy harvester. The energy harvester was designed, and kinematic modeling was carried out to establish power–output relations as a function of rack velocity. Sensitivity analysis of various parameters indicated that, for high-speed applications where rack velocities are relatively high, small input excitations could be harnessed to achieve the rated revolutions per minute (RPM) of the generator. A set of laboratory tests was conducted to validate the kinematic model, and a good correlation was observed between measured and predicted voltages. Dynamic modeling of the plate was done for both recovery and compression to obtain the plate and rack velocities. Using Monte Carlo simulation, the plate was designed for a class-9 truck with wide-base tires moving at 128 km/h. Design and layout of the energy harvester with a displacement transfer plate was proposed for field validation. The energy harvester with the displacement plate could be integrated with transverse rumble strips in construction zones and near diversions. Hence, it could be used as a standalone system to power roadside applications such as safety signs, road lights, speed cameras, and vehicle-to-infrastructure (V2I) systems.
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Cordova, Steve Ray, Salvador Portillo, Bryan Velten Oliver, James R. Threadgold, Ian Crotch i Derek Raymond Ziska. Characterization of the self magnetic pinch diode at high voltages for flash radiography. Office of Scientific and Technical Information (OSTI), październik 2008. http://dx.doi.org/10.2172/943864.

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Baete, Christophe. PR-405-163600-R01 Assessing High Voltage DC Interference Risks on Buried Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), kwiecień 2019. http://dx.doi.org/10.55274/r0011566.

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This report refers to the activities performed in the frame of PRCI project on the evaluation of interference risk from high voltage power lines (HVDC) on buried pipelines. There exist different types of HVDC systems and configurations and only some of them may affect pipeline corrosion and safety. First, a literature study was performed to identify the various HVDC system configurations and operational conditions, to define the corrosion and safety threats on pipelines and the parameters influencing the interference level. Next, simulations were performed to understand how the operational conditions of the HVDC system, the pipeline properties, the cathodic protection settings and the soil conditions determine the magnitude of DC stray current corrosion and voltage induced safety risk. Lastly, industrial cases were simulated and mitigative measures were proposed. Guidelines are proposed for estimating the risk associated with HVDC lines. This report has a related webinar.
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Ruggles, M. B., i Y. Takahashi. High-temperature flaw assessment procedure: A state-of-the-art survey. Office of Scientific and Technical Information (OSTI), maj 1989. http://dx.doi.org/10.2172/6171928.

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Langton, C. A. State of the Art Report on High-Level Waste Tank Closure. Office of Scientific and Technical Information (OSTI), czerwiec 2002. http://dx.doi.org/10.2172/799385.

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Hopper. L30500 Analysis of the Effects of High-Voltage Direct-Current Transmission Systems on Buried Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), styczeń 2008. http://dx.doi.org/10.55274/r0010196.

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The economics of high voltage direct current for long-distance transmission of electrical energy have been reported as very attractive, to the extent that several projects are in the making. Several reasons other than the savings in transmission costs, for example the exchange of peak power between time zones and seasonal zones, would permit utilities to save on plant investment for generating capacity while maintaining a high level of service. This report summarizes work on the initial phase of a study to determine the effects of high-voltage direct-current (H.V.D.C.) electric transmission lines on buried pipeline systems. Pipeline Research Council International, Inc. initiated this work in response to an anticipated threat posed by the Pacific Northwest-Southwest Intertie H.V.D.C. system now being designed (and other possible H.V.D.C. lines in the future) because of the announced plans to pass direct current through the earth. The objectives of the overall program are:(1) To determine the nature and magnitude of problems that will be created by the earth current from H.V.D.C. systems, and(2) To devise means of protecting pipelines from the effects of such currents. A computer program was written based on a mathematical model of a buried pipeline in the environment created by an H.V.D.C. system. Excellent agreement was obtained between computed soil potential gradients and measurements obtained during a field test of H.V.D.C. in Oregon. Reasonably good agreement was also obtained between measured pipe-to-soil potentials on the Pacific Lighting Gas Supply Company pipeline near Camino, California, and computed values during a field test of H.V.D.C. power transmission.
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Yellets, Jeffrey P., Jeffrey P. Yellets, Stephen M. Hsu i E. Erwin Klaus. The design and construction of a state-of-the-art high temperature tribometer. Gaithersburg, MD: National Institute of Standards and Technology, 1988. http://dx.doi.org/10.6028/nist.sp.755.

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Beg, Farhat N. High Energy Density Physics and Applications with a State-of-the-Art Compact X-Pinch. Office of Scientific and Technical Information (OSTI), sierpień 2013. http://dx.doi.org/10.2172/1089941.

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