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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 5046 for “"Voltage"”.
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Voltage calculation on low voltage feeders with distributed generation
… scale generators, close to load centres in low voltage distribution networks such as solar PV panels in residential houses, to supplement the energy needs of consumers. This has sparked much debate over the impacts, as well as benefits, of increasing the amount of generation on these low voltage …
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Low-voltage High-efficiency Fast-transient Voltage regulator Module
… microprocessors are being designed with lower voltage implementations. The processor voltage supply in future generation processors will decrease to 1.1 V ~ 1.8V. More devices will be packed on a single processor chip, and processors will operate at higher frequencies, beyond 1GHz. Therefore, …
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Voltage programmable materials
… interface reactions paves the way towards voltage control of these properties in solid-state devices. Here, we focus on ferromagnetic metal/metal-oxide bilayers that exhibit strong perpendicular magnetic anisotropy derived from interfacial oxygen hybridization. In these materials, we …
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Investigation of High-Input-Voltage Non-Isolated Voltage Regulator Modules Topology Candidates
… the 5V plane on the system board. A so-called Voltage Regulator Module (VRM), is put close to the processor in order to provide the power as quickly as possible. Nowadays, for desktop and workstation applications, VRM input voltage has moved to the 12V output of the silver box. In the meantime, …
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Optimal voltage stability assessment based on voltage stability indices and artificial neural network
The evaluation of voltage stability assessment experiences sizeable anxiety in the safe operation of power systems, due to the complications of a strain power system. With the snowballing of power demand by the consumers and also the restricted amount of power sources, therefore, the system has to …
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Medium voltage extreme fast charger based on novel medium voltage SiC power devices
… Austin SuperMOS devices are used as the medium voltage power electronic switches and soft-switching over the entire range of grid voltage has been ensured by a novel variable switching frequency double phase shift modulation technique. Experimental results validate the simulation results and …
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Operation and analysis of high-voltage-gain dc-dc converters with voltage multipliers
… steady-state operations of four different high-voltage-gain step-up dc- dc converters to achieve a high gain. These topologies consist of a two-phase interleaved boost stage with three various voltage multiplier (VM) stages. The first stage of the first three topologies is the same, which is a …
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Designing low voltage feeders to meet quality of supply specifications for voltage variations
… is necessary to not over- or under-design a low voltage (LV) distribution network as this leads to unnecessary capital expenditure. The main source of uncertainty in designing LV residential distribution networks has been found to be the mode used to model the residential load. Residential …
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High Frequency Isolated Power Conversion from Medium Voltage AC to Low Voltage DC
… CLLC converter is also given in the end. Medium voltage high frequency transformer is the key element in terms of insulation safety, power density and efficiency. Firstly, two mostly used transformer structures are compared. Then transformer insulation requirement is referred for 4160 V …
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Design of universal insulation systems for low voltage and high voltage rotating electrical apparatus
… insulation systems optimized based on operating voltage. This apparatus specific design approach, while effective, necessitates a variety of electrical insulation system topologies and material choices. It is proposed that a universal insulation design approach with respect to material selection …
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Voltage Sensing Mechanism in the Voltage-gated and Proton (H+)-selective Ion Channel Hv1
… by which changes in ΔpH affect the apparent voltage dependence of GAQ activation is not understood. In order to measure voltage sensor (VS) activation in Hv1, we mutated a conserved Arg residue in the fourth helical segment (S4) to His and measured H+ currents under whole-cell voltage clamp …
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High voltage sampling scheme independent of capacitor voltage coefficient for a delta sigma modulator
… modulator that is independent of common mode voltage. The rejection of common mode voltage is important in the application of electric vehicles and other large battery packs in order to accurately measure every cell on the stack with varying common mode voltages. A switched capacitor …
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Investigating Impact of Emerging Medium-Voltage SiC MOSFETs on Medium-Voltage High-Power Applications
… approached their limits of operation in blocking voltage, working temperature and switching frequency. Due to material superiority, the relatively-new wide-bandgap semiconductors such as Silicon-Carbide (SiC) MOSFETs enable higher voltages, switching frequencies and operating temperatures when …
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Design and Verification of a High Voltage, Capacitance Voltage Measurement System for Power MOSFETs
There is a need for a high voltage, capacitance voltage (HV, CV) measurement system for the measurement and characterization of silicon carbide (SiC) power MOSFETs. The following study discusses the circuit layout and automation software for a measurement system that can perform CV measurements for …
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Voltage programmable diffraction grating device
In this research, voltage programmable liquid device has been introduced, studied and a relationship was verified for the electromagnetic relationship between the parameters of the device and the switching application was characterised. The basic operation of the device is to create sinusoidal …
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Voltage programmable liquid optical devices
In this study I have looked at two types of voltage programmable liquid optical device. The first is a rotatable liquid crystal waveplate and the second is an amplitude programmable liquid phase grating. The rotatable waveplate was created by confining a droplet of E7 nematic liquid crystal between …
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High Voltage Pulse Measurement System
… system to safely and accurately measure high voltage, high frequency pulses in harsh EM environments. High voltage pulses apply to medical, plasma, and food industries. The difficulty of accurately measuring high voltage pulses continues to pose an issue. Measuring high voltage systems can …
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Continuous voltage-frequency scaling (CVFS)
Voltage reduction is an effective technique for minimizing energy consumption but suffers from delay penalty. Conventional methodologies require rigorous voltage regulation and workload scheduling to meet timing constraints. In this work, we observe that static CMOS is robust under low supply …
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