electrical engineering-high voltage


high voltage research papers 2013

Electrochemical and Interfacial Reaction Behavior of High-Voltage LiNi0. 5Co0. 2Mn0. 3O2 Cathode for Lithium-Ion Batteries
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Multi-component cathode material of LiNi1-xy CoxMnyO2 with layered hexagonal structure has been regarded as a promising cathode material due to lower cost, less toxicity, higher thermal stability and higher operation voltage than the single-component materials. 1 Its 

Indole Derivatives as Film Forming Additives for High-Voltage Lithium-Ion Positive Electrode
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For the last decades, lithium-ion batteries (LIBs) have been used as the power source for mobile electronic devices . In the near future, the market of LIBs seems to expand to the power sources for electric vehicles and energy storage devices . The existing LIB 

Progress in the Resolution of Materials Challenges for High-Voltage SiC Power Devices DK Gaskill1, RL Myers-Ward1, ZR Robinson1, VD Wheeler1, PB Klein1, NA
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Silicon carbide (SiC) is a material of interest for hightemperature, high-voltage and high- power switching device applications. Key materials challenges inhibiting such devices include elimination of basal plane dislocations (BPDs) and enhancement of minority 

Effect of Li Content on the Cycling Performance of High Voltage, High Capacity LixMn1. 5Ni0. 5Oy Cathodes
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Recently, extensive research has been done to optimize lithium-ion rechargeable batteries (LIBs) for vehicle, military and grid applications. LIBs are preferred when compared to other secondary batteries due to their high voltage and high energy density. However, the 

Study of the Crystal Growth Process and the Electrochemical Properties of High Voltage Cathode Active Materials: LiNi1/2Mn3/2O4
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Spinel structured LiNi1/2 Mn3/2 O4 is expected as a next generation cathode active material for high-voltage lithium-ion batteries. The biggest problem of the cathode is the poor cycleability due to the decomposition of the electrolyte. However a recent study revealed 

Functional changes of the myocardium in survivors of high-voltage electrical injury
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Introduction: There are limited long-term follow-up data on functional changes in the myocardium after high- voltage electrical injury (HVEI). Methods: Twenty-three patients who had been exposed to HVEI ( 20,000 volts) and preserved left ventricular ejection fraction (=55%) were 

Double-Membrane Design for High-Voltage and Low-Crossover Redox Flow Batteries
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Decoupling energy capacity and power delivery, redox flow batteries (RFBs) have great design flexibility and scalability, particularly suitable for the applications of renewable (eg, wind and solar) electricity storage [1, 2]. As electrochemical devices, RFBs are also free 

Effect of high-voltage cycling on non-precious metal catalysts for the ORR
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While Proton Exchange Membrane Fuel Cells (PEMFCs) are already entering the portable sector and the market of materials handling vehicles, the long term economic growth of this technology remains subject to further advances in electrocatalysis and to the cost of 

The effect of crystal structure, chemical composition, and binder on the full-cell performance of high voltage spinel positive electrodes for lithium-ion batteries
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The LiMn1. 5Ni0. 5O4 (LNMO) spinel has attracted great interest as a promising cathode material in lithium ion batteries due to its low cost, high power performance and high operating voltage (~ 4.8 V). However, the LNMO system presents several challenges 

In Situ Fluorescence Spectroscopy Studies of Interfacial Processes On LiNi0. 5Mn1. 5O4High-Voltage Cathodes
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Significant improvements in energy density, safety, and lifetime of lithium-ion batteries are necessary to allow their rapid adoption for automotive applications. One approach is to find and develop cathode materials with higher operating potentials. Spinel LiNi0. 5Mn1. 5O4 

Anodic dissolution suppression of the aluminum current collector in high voltage stable electrolytes containing lithium imide salts
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Almost all commercial lithium ion batteries are based on LiPF6 as state-of-the-art electrolyte salt . The choice of LiPF6 is related to its overall well-balanced properties, however not on the basis of any single outstanding property . Besides good conductivity, electrolytes 

Diathermy-induced ventricular fibrillation with Riata high-voltage lead insulation failure
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A 76-year-old man presented to a small peripheral hospital after a series of six shocks in quick succession from his implanted biventricular defibrillator (St Jude Medical Promote Accel RF device; right atrial, right ventricular, and left ventricular leads were SJM1688T, 

The Use of Methyl Butyrate-Based Electrolytes With Additives to Enable the Operation of Li-Ion Cells With High Voltage Cathodes Over a Wide Temperature
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There is continued interest in utilizing high capacity, high voltage cathode materials for use in high specific energy Li-ion cells. The Department of Energy (DoE) desires such materials to enable plug-in hybrid electric vehicles (PHEVs) and other automotive applications. 

High Voltage Direct Current (HVDC) Insulation and Diagnostics
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Dielectrics and Electrical Insulation (TDEI) will be a special issue on High Voltage Direct Current (HVDC) Transmission System Insulation topics. The aim of this issue is to provide 

High-voltage equipment electromagnetic spectrum study for estimation of its technical state and prediction of the residual life
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ABSTRACT The new technology of estimation technical state of electrical equipment is presented. It is based on the registration and analysis of electromagnetic radiation accompanied with the operation of high-voltage equipment. Principles for implementation 

Damping of subsynchronous resonance using a voltage source converter-based high-voltage direct-current link in a series-compensated Great Britain
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ABSTRACT Owing to increased levels of generation in Scotland, substantial onshore and offshore reinforcements to the Great Britain (GB) transmission network have been proposed. Possible inland reinforcements include the use of series compensation through fixed 

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Polymeric insulating materials are applied as housing materials of composite insulators in different design variations and for all voltage levels. They are known for their advantageous properties such as the resistance to UV weathering and the excellent dynamic 

Thermal stability of high voltage spinel with disordered and ordered phase
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High voltage spinel LiNixMn2-xO4 (x is around 0.5 and will be referred to as LNMO) has been heavily investigated recently due to its advantage of high operating voltage at~ 4.7 V versus Li+/Li1. Its electrochemical performance has been shown to depend on many 

Self-discharge phenomenon of a high voltage Li (MnNi) O spinel investigated by Raman spectroscopy
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Raman spectroscopy is a very appropriate tool to enrich the knowledge of the structure of Li intercalation compounds on the atomic level . Indeed, we have previously shown that a wealth of structural information including symmetry changes, local disorder, changes in 

Effect of Interaction of Deep Level Defects with Quantum Well States on Detrapping Transients in High-Voltage AlGaN/GaN HEMTs Sandeepan DasGupta1,
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AlGaN/GaN High-Electron-Mobility Transistors (HEMTs) have traditionally been the device of choice in RF electronics. More recently, the ease of achieving a low on-state resistance due to high channel mobility (µch) coupled with a wide bandgap (Eg= 3.4 eV) has led to 

Tailoring the Electrochemical Performance of P2-Na0. 45Ni0. 22Co0. 11Mn0. 66O2 as High Voltage Or High Capacity Cathode Material for Sodium-Ion
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Sodium-Ion batteries are currently discussed to be an interesting alternative to the commonly used lithium-ion battery technology because of a lithium shortage possibly occurring if lithium-ion batteries are used for large scale applications like eg electric 

Facile synthesis of aliovalent vanadium doped high voltage LiNi0. 5Mn1. 5O4 cathode with extraordinary high temperature performance
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LiNi0. 5Mn1. 5O4 cathode material for lithium secondary battery has high energy density and high stability. At high temperature operation, this material has less performance with material decomposition being the main reason for less stability1-2. Here, we tried to 

A High-Voltage Neural Stimulator Combined with a Low-Voltage Recorder
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ABSTRACT This paper presents a high-voltage (HV) neural stimulator combined with a low- voltage (LV) neural recorder. In many bidirectional neural implementations with a high voltage compliance for the stimulation is it not possible to have a high density due to the 

Sythesis of High Voltage Supercapacitor and Electrochemical Performance
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The work unit for 100 V voltage of the hybrid supercapacitor is synthesized by using Ta/Ta2O5 as the anode, activated carbon as the cathode. Compared with the usual electrochemical capacitor working voltage, the capacitance had improved. The 

A Step Up Dc–Dc Converter With High Voltage Gain for Microsource Applications
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ABSTRACT This paper proposes a new high step-up dc–dc converter designed especially for regulating the dc interface between various microsources and a dc–ac inverter to electricity grid. The converter achieves high step-up voltage gain with appropriate duty ratio and low 

High voltage Na3V2O2x (PO4) 2F3-2x (0 x 1) cathode materials for Na-ion batteries
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Sodium-ion batteries have arisen as good candidates to become alternative systems that could complement commercial Li-ion systems . The use of Na instead of Li in rocking chair batteries could mitigate the possible shortage of lithium in an economical way. For this 

KEMET film capacitors for high temperature, high voltage and high current
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ABSTRACT Trends of several applications like down-hole drilling, commercial aviation (eg jet engines), heavy industrial and automotive are challenging the capabilities of capacitors and other electronic components. The growing harsh-environment conditions for these 

Tender XPS studies of the interfacial reactivity between the high-voltage cathode, LiMn1. 5Ni0. 5O4, and the electrolyte
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With a 4.7 V voltage vs. Li+/Li and a capacity of 147 mAh g-1, LiMn1. 5Ni0. 5O4 is an attractive cathode material for high-energy and high power applications such as electric and plug-in hybrid vehicles . However, it operates at voltages above the oxidation limit of 

Effect of Space Charge Density and High Voltage Breakdown of Surface Modified Alumina Reinforced Epoxy Composites
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The incorporation of 90 nm alumina particles into an epoxy matrix to form a composite microstructure is described in present study. It is shown that the use of ultrafine particles results in a substantial change in the behavior of the composite, which can be traced to 

Insight Into the Structural Changes of High-Voltage Spinel During the Lithium Intercalation
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Due to its high energy density, excellent rate capability and outstanding cycling stability, the highvoltage spinel LiNi0. 5Mn1. 5O4 is considered as one of the most attractive cathode materials for lithium ion batteries aiming at hybrid electric vehicles (HEVs) and plug-in 

Electrolytes for High Voltage Cathode Materials
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The state of art electrolyte (1.0 M LiPF6-EC: DEC (2: 1 v: v)) has an anodic stability lower than 4.7 V vs. Li/Li+, due to the decomposition of the carbonates. The graphite-LiNi0. 5Mn1. 5O4 full cells were fabricated and tested with/without additives (LiBOB, LiODFB and Tris (2 

High Voltage Ratio Measurement Base on Two-Digital-Meters External Synchronous Trigger Mode
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High Voltage Ratio Measurement Base on Two-digital-meters External Synchronous Trigger Mode Feipeng Lin 1,a , Huanghui Zhang 2,b , Haiming Shao 1,c , YanQiang LI 3,d ,  Keywords: Two-digital-meters, Synchronous trigger, High voltage ratios, Automatic measurement 

Effect of High Voltage Pulsed Galvanic Stimulation on Head Control in Spastic Diplegic Cerebral Palsy
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ABSTRACT The purpose of this study was to evaluate the effect of high voltage pulsed galvanic current in spastic diplegic cerebral palsy on head control. Thirty children participated in this study; they were assigned in two groups of equal number, group A&B. Their ages ranged 

Impact of Electrolyte Additives On the Performance of High Voltage Spinel Cathode Materials for Lithium Ion Batteries
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The wide spread application of lithium ion batteries for use ranging from portable electronics and power tools to electric vehicles continues to place everincreasing demands on the battery system to provide higher energy density, higher power density, and improved cycle 

Calculation for the Heating and Safe Operation Time of YKK Series High-voltage Motors in Starting Process
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ABSTRACT In order to analyze the heating and cooling conditions of high voltage motors of YKK series in starting process, the starting characteristics and ventilation systems are calculated. The starting characteristics calculation method is improved and compared with 

Location and Classification of Faults in High Voltage Underground Cable Using Wavelet Transform
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ABSTRACT Protecting transmission lines is one important task to safeguard electric power systems. The transient fault signal on transmission lines need to be detected, classified and located accurately and cleared as fast as possible. This research present an application of 

Series Active Power Filter for High-Voltage Synchronous Generators
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ABSTRACT In this paper, an approach for minimization of voltage harmonics in the output of synchronous generators (SG) is described. It is based on three single-phase series active power filters (SAPF) that are inserted close to the common point of SG through an injection 

Experimental Study of the Underwater Shock Wave on the High-Voltage Electric Discharge by Carbon Fiber
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 The shock wave used in this research is generated in the water by a pulse electric discharge of the high voltage [1]. As for it, it is studied a high voltage pulse discharge about a particularly underwater gap discharge and thin wire discharge. 

The Development of the High-Voltage Modulators Based on TM703FB Vacuum Tube for Auxiliary Heating on HL-2A
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Qing LI a , Weimin Xuan b , Xiaohui Mao c , Yali Wang d  Southwestern Institute of Physics, Chengdu China

TSW3070EVM: Wide-Bandwidth and High-Voltage Arbitrary Waveform Generator Front End
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Page 1. Ken Chan TI Designs High Speed: Verified Design TSW3070EVM: Wide-Bandwidth and High-Voltage Arbitrary Waveform Generator Front End  1 TIDU129–September 2013 TSW3070EVM: Wide-Bandwidth and High-Voltage Arbitrary Waveform Generator Front End 

Calculation of power frequency fields from high voltage overhead lines in residential areas
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ABSTRACT Precise calculation of magnetic fields produced by overhead power lines is highly important in several research areas. Although there are many commercial software packages dedicated to estimate the power frequency fields under the overhead 

Thermal Transfers of SF 6 Electrical Arcs in High Voltage Circuit Breakers
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In order to succeed the electrical arc quenching that appears at the opening of a high voltage circuit breaker, all the electromagnetic energy stored by the network must be dissipated . Indeed, at the time of current cutting, the energy dissipated by the Joule 

Lithium electrolyte based on quaternary ammonium ionic liquids for high voltage lithium batteries
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Organic solvents are widely used in commercial lithium batteries as electrolyte with high electrical conductivity and good compatibility with electrode materials. Nevertheless, the reactivity and volatility of organic electrolyte are disadvantageous to its commercial 

Suppression Techniques of Subthreshold Hump Effect for High-Voltage MOSFET
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ABSTRACT In this paper, simple but very effective techniques to suppress subthreshold hump effect for high-voltage (HV) complementary metal-oxidesemiconductor (CMOS) technology are presented. Two methods are proposed to suppress subthreshold hump effect using a 

Evaluation of Electromagnetic Fields Exposure During Live Line Working Conditions InsideHigh Voltage Substations
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ABSTRACT The probable risk of electromagnetic fields produced inside high voltage substation is still considered as a competitive topic for utility designers and biomedical field researchers. Hence, the electromagnetic field levels and their induction inside human 

Partial Discharge Detection of High Voltage Switchgear Using a Ultra High Frequency Sensor
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Partial discharge diagnosis techniques using ultra high frequencies do not affect load movement, because there is no interruption of power. Consequently, these techniques are popular among the prevention diagnosis methods. For the first time, this measurement 

Conceptual framework of a Solar PV based high voltage Battery charging strategyfor PHEVs and EVs
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ABSTRACT With the emergence of plugin hybrid electric vehicles (PHEVs) and electric vehicles (EVs) in the automotive market, the rate of the demand for electric power supply may be higher than the projected level. Distributed power generation is a feasible solution to 

Analysis of Vibration Isolator's Anti-Seismic Performance in Porcelain SF6 High Voltage Circuit Breaker
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ABSTRACT Choosing LW15-550Y porcelain high voltage SF6 circuit breaker as the research subject, we designed the lead laminated rubber bearing (LRB) seismic isolation device for LW15-550Y circuit breaker. We finally gets the results that the LRB isolation system 

Algorithm for Diagnostics of High-Voltage Equipment Based on Artificial Itelligence Technologies
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ABSTRACT This paper describes the diagnostics algorithms of one of the most important elements of the electric mains-the circuit breaker. There are the descriptions of two versions of the intelligent diagnostic algorithm of highvoltage circuit breakers based on neural 

Single-Phase Z-source Matrix Converter with High Voltage Gain
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ABSTRACT This paper proposes a new type of converter called Single Phase Z-source Matrix Converter (SPZMC). The SPZMC is an ac-to-ac converter device. Simulated using diode bridge bidirectional switch cell. The simulation is performed in different loads with fixed input and 

A High-Voltage On-Chip Power Distribution Network
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ABSTRACT With high performance mobile computing devices like tablets and smart-phones virtually swiping the VLSI chip market, the industry is facing the perpetual challenge of optimizing between power and performance, more than ever before. Although, existing 

Droplets deform in a solid at high voltage
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Two colliding protons can produce a neutral pion in the reaction p+ p? p+ p+ p0, but only if the initial kinetic energy in their center-of-mass reference frame exceeds the 135-MeV pion mass. If the target proton was initially almost at rest, this kinematic requirement translates 

Soft Starter of High-Voltage Asynchronous Motor based on Power Electronic Reactor?
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ABSTRACT In order to deal with the start problem of high-voltage and large-capacity motors, a soft start method which adopts power electronic reactor in its main circuit is designed. A principle of high-voltage motor's soft starter based on the power electronic reactor is 

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Many nuclear physics experiments with accelerated particles require a very good beam energy resolution while the beam energy is required to be continuously adjustable. The high beam energy resolution is obtained by the inclusion of a magnetic ion beam analysis 

Analysis of Corona Noise in High Voltage Power Line Communication (PLC) under QPSK Modulation in OFDM
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ABSTRACT PLC is a popular communication channel for broadband access, multimedia sharing and as a smart grid. However, there are many disadvantages in PLC and causes deterioration of signal quality, bit error and electromagnetic interferences. High voltage ( 

Development of High Voltage DC-XLPE Cable System
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We have developed a cross-linked polyethylene (DC-XLPE) insulating material that has excellent properties for DC voltage applications. Our high-voltage (HV) DC XLPE cable and factory joints using this material showed positive results in a polarity reversal test and 

High Voltage Gain Boost Converter for Micro source Power Conversion system
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In the proposed converter, a coupled inductor and voltage lift technique is used for raising the voltage gain. The designed converter especially for large voltage conversion ratio applications. By combining coupled inductor and voltage lift technique, the energy stored 

Current and voltage efficiency of high pressure PEM water electrolyzers
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In terms of energy storage, the pressurization of hydrogen is a useful task in order to enhance the energy density of the gas . Thus, a direct electrochemical compression during water electrolysis is considered as a convenient and effective way to produce and 

Network simplex method based Multiple Voltage Scheduling in Power-efficient High-level synthesis.
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Network Simplex Method Based Multiple Voltage Scheduling in Power-Efficient High-Level Synthesis Cong Hao, Song Chen, Takeshi Yoshimura Graduate School of IPS, Waseda University, Japan 01/23/2013 Page 2. ? 2 Outline ? IntroductionPrevious Work 

High-voltage SoI Unity-gain Voltage Buffers with Function-enable and Power-down Functionality
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ABSTRACT This paper discusses possibilities of enable and power-down functionality implementation in HV SoI unity-gain buffers. Modifications of selected HV buffer structures are analyzed. Approaches of power-down, high input and output impedance functionality 

Partial Discharge Detection in High Voltage Equipment Using High Frequency Current Transducer
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ABSTRACT This paper presents a development of the high frequency current transducer (HFCT) for off-line partial discharge detection. The NiZn ferrite core and the 37 turns of 24 SWG copper winding were used for the designed HFCT. Different objects such as basic 

Designing a Low Voltage, High Current Tunneling Transistor
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Tunneling Field Effect Transistors (TFETs) have the potential to achieve a low operating voltage by overcoming the thermally limited subthreshold swing voltage of 60mV/decade , but results to date have been unsatisfying. The low voltage operation is parameterized by 

Low Voltage and High Oscillation Frequency Gated Ring Oscillator Using Bootstrap Technique
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Page 1. Low Voltage and High oscillation Frequency Gated Ring Oscillator using  We can see from Figure 6 that the oscillation frequency of the proposed circuit is higher than that of gated ring oscillator at low power supply voltage, however is lower at high power supply voltage. 

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ABSTRACT A hybrid phase shifted full bridge (PSFB) and LLC half bridge (HB) dc- dcconverter for low-voltage and highcurrent output applications is proposed in this paper. The PSFB shares its lagging leg with the LLC-HB and their outputs are parallel connected. 

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ABSTRACT Floating Gate MOS (FGMOS) transistors can be very well implemented in lieu of conventional MOSFET for design of a low-voltage, low-power current mirror. Incredible features of flexibility, controllability and tunability of FGMOS yields better results with 

Current Doubler Rectifier for High Power and Low Voltage DC/DC Converter Applications
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ABSTRACT The rectifier has important influence on a DC/DC converter's characteristics including the efficiency, the output voltage ripple and the dynamic behavior. By analyzing the difference between the center trapped rectifier and the double current rectifier, this 

High Impulse Voltage and Current Measurement Techniques
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Design of Plasma Generator Driven by High-frequency High-voltage Power Supply
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ABSTRACT In this research, a high-frequency high-voltage power supply designed for plasma generator is presented. The power supply mainly consists of a series resonant converter with a high-frequency high-voltage boost transformer. Due to the indispensable 

Low On-Resistance High Breakdown Voltage GaN Diodes on Low Dislocation Density GaN Substrates
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Vertical gallium nitride (GaN) Schottky barrier diodes (SBDs) were fabricated on freestanding GaN substrates with low dislocation density. A high quality n-GaN drift layer with an electron mobility of 930 cm2/Vs was obtained under the growth condition 

Modeling of Variable-Speed Wind Generator and Study of Voltage Stability of Power Grid with HighWind Power Penetration
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Zhenyu Xu 1, a , Qian He 1,b ,Jingqi Su 1,c , Zhen Qiao 1,d and Xu Zhang 1,e  1School of Electrical Electronic Engineering, North China Electric Power University, Changping, Beijing,

SiC High Blocking Voltage Transistor
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Recently, with the growing global interest in energy saving, power device efficiency is increasingly important. Most power devices are fabricated utilizing silicon (Si) and the performance of Si has reached its limit. Silicon Carbide (SiC) is the best candidate 

Multichannel Amplifier Topologies for High-Sensitivity and Reduced Measurement Time inVoltage Noise Measurements.
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ABSTRACT In this paper, we discuss a few techniques that al-low an effective reduction of the background noise and/or the reduction of the measurement time when performing voltage noise measurements by employing a number of nominally identical voltage amplifiers with 

High-Output Voltage Swing in Silicon Broadband Distributed Amplifiers
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ABSTRACT The various foundries are now producing CMOS, SiGe and BiCMOS technologies with device speeds that are comparable to some of the III-V technologies. Electro-optical modulators typically are driven with voltages in the range of a few volts to tens of volts, and 

A transistor-only power-efficient high-frequency voltage-mode stimulator for a multichannel system
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ABSTRACT This paper proposes a fully implantable high-frequency switched-mode neural stimulator. The main circuit consists of 2N transistors for an N-electrode system in which all channels can be stimulated concurrently and independently. System simulations show 

A View towards High Speed Bi-stable RF MEMS Switch with Low Actuation Voltage
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ABSTRACT It has been a long time that cell phone technology has been totally dependent on RF switches. In spite of their being the same functionally, there has been quite a change in the way they have been made. In the past few years activities have been done to utilize 

Designing a Half-adder Circuit with Voltage-mode and Multiple-valued Logic, Low Power Consumption and High Speed
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ABSTRACT This article suggests a Quaternary Voltage-Mode Half-Adder Circuit with high speed and low power and capacity consumption. This quaternary circuit is composed of Max Operator, Min Operator, Level Conversion Operator, and Tsum and T-difference Operators 

A contingent valuation approach to the valuation of high voltage transmission lines
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ABSTRACT This paper is to determine the effect High Voltage Transmission Lines (HVOTLs) have on property values, the perception residents have of the effect on value and whether residents are prepared to pay to have an existing HVOTL removed from their 

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To date, replacing outdated high voltage switches come modern vacuum switches and SF6 insulated high and very high voltage. These electrical devices are rapidly evolving and improving. The use of sulfur hexafluoride as arc-extinguishing medium efficiently 

Stable Reversible Overcharge Protection for High-Voltage Rechargeable Lithium Batteries
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Lithium batteries are prone to energetic venting, ignition, and even explosion following severe overcharging . Even slight overcharging reduces the discharge capacity of a cell, potentially causing overdischarging, increased impedance, and local heating . Battery 

The influence of electrochemical stability and solubility of conductive salts on the behavior ofhigh voltage electrochemical double layer capacitors
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Electrochemical double layer capacitors (EDLCs), also known as supercapacitors, display high power (10 kW· kg-1) and extremely high cycle life (up to millions of cycles)[1]. Because of these characteristics EDLCs are currently considered as one of the most important 

Nanoscale X-ray microscopy of High Voltage Lithium-Rich MNC Composite Cathodes with 2D/3D Chemical/Elemental sensitivity Yijin Liua, Surendra K.
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It is important to probe and to understand the correlation between morphological and chemical changes within battery electrodes under electrochemical cycling. This is specifically relevant for the new class of high voltage layered-layered lithium-rich 

The Effect of the Electromagnetic Radiation from High Voltage Transformers on Students Health in Hebron District
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1.1 Background The last three decades have witnessed a tremendous growth in all aspects of modern technology such as cellular phones, wireless communication links, antennas, microwave ovens, and high voltage transformers which are sources of the electromagnetic 

Generation of wide range THz waves Using a laser chaos and a high bias voltage
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ABSTRACT Generation of a wide-range and stable THz waves from a photoconductive antenna excited by a multimode semiconductor chaotic oscillation laser with an optical delayed feedback using an external mirror is investigated. A high bias voltage is also used 

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