Global ETD Search
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 686 for “"Three-Phase"”.
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Three-phase Heat Transfer
Phase-change heat transfer involves the exchange of thermal energy when a substance transitions between different phases, such as solid to liquid (melting), liquid to vapor (boiling), or vice versa. During phase-change, energy is absorbed or released without a change in temperature. In particular, …
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Three-Phase Generation Using Reactive Networks
<p>Household appliances utilize single-phase motors to perform everyday jobs whether it is to run a fan in an air conditioner or the compressor in a refrigerator. With the movement of the world going “green” and trying to make everything more efficient, it is a logical step to start with the items …
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Three-Phase and Unidirectional Heat Transfer
… shortcomings of each existing solid-state and phase-change thermal diode, we develop a unique thermal diode, called bridging-droplet thermal diode, which operates independent of orientation, is planar and durable. Our diode is comprised of two opposing copper plates separated by an insulating …
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Three-phase inverter for motor drive applications
Embargo set by: Colleen Fallaw for item 102793 Lift date: 2019-08-10T21:27:21Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Modeling and control of three-phase PWM converters
… and average models are developed for major three-phase PWM converters. The models are correct for the case when the voltage sources or capacitors with nonzero parasitic resistances are placed across the converter dc port or ac terminals. The effects of the parasitic resistances are described …
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Three-Phase Linear State Estimation with Phasor Measurements
… a research project which aims to implement a three phase linear tracking state estimator on Dominion's 500kV network that would use only PMU measurements to compute the system state. This thesis represents a portion of the work completed during the initial phase of the research project. This …
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Dynamics and Statics of Three-Phase Contact Line
… chemistry, micro/nanofluidic devices, and phase change heat transfer enhancement. Generally, wetting is governed by the dynamic and static behaviors of the three-phase contact line. Therefore, a deep insight into the dynamics and statics of three-phase contact line at nanoscale is necessary …
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Development of current control for three phase multilevel inverter
Inverter is a device, a type of electronic converter in which purpose is to convert a DC signal to AC signal. This project aims to develop a current control method for a multilevel inverter. The purpose of adding a controller is so that the output from the said device, can be controlled and …
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Studies in three phase gas-liquid-solid fluidised systems
… biochemical and petroleum operations involving three-phase, gas-liquid-solid fluidisation; such systems are in increasing use. It is believed that this is one of few studies concerned with `true' three-phase, gas-liquid-solid fluidised systems, and that this work will contribute significantly to …
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Non-contact voltage monitoring of three-phase power cables
… capacitive coupling to monitor AC voltages in three-phase power cables. Using an existing sensor architecture, three-phase line voltages are accurately reconstructed through intrusive calibration techniques. Experimental results are presented for measuring 60 Hz line voltages using …
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Modeling and Control of Parallel Three-Phase PWM Converters
… studies modeling and control issues of parallel three-phase pulse-width modulated (PWM) converters. The converters include three-phase boost rectifiers, voltage source inverters, buck rectifiers and current source inverters. The averaging of the parallel converters is performed based on a generic …
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Three-phase power conversion using soft-switching PWM techniques
… related to high-frequency soft-switching PWM three-phase power converters. These are: 1. Analysis, synthesis, and design of three-phase soft-switching PWM power converter topologies 2. Design of input EMI filters for three-phase converters 3. Design of microprocessor controllers for …
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Passive Component Weight Reduction for Three Phase Power Converters
… transportation systems, and the power grid. Three-phase voltage source converters (VSCs) have become the converter of choice in many ac medium- and high-power applications due to their many advantages, such as high efficiency and fast response. For transportation applications, high power …
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Multiple Three-Phase Induction Generators for Wind Energy Conversion Systems
… in the number of published works on multiphase machines and drives. This increased interest has been largely driven by a need for the so-called green energy, i.e. energy generated from renewable sources such as wind, and also an increased emphasis on greener means for transportation. Some …
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Design and implementation of three-phase four-wire active filters
… present excellent performance characteristics in three phase configurations. However, in a number of installations, four-wire systems are used. Furthermore, if the three phase load is unbalanced, neutral currents flow and the three phase three-wire active filter cannot adequately eliminate …
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Correcting Current Imbalances in Three-Phase Four-Wire Distribution Systems
… solution to unbalanced current loading on three-phase four-wire systems. The Unbalanced Current Static Compensator is the name of the prototype; herein referred to as the UCSC. The purpose of this prototype is to redistribute current between the three phases of a distribution system. …
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Capillary Effects on Three-Phase, Two-Component, Gas-Liquid Inclusions
Made available in DSpace on 2017-07-06T18:55:45Z (GMT). No. of bitstreams: 3 Pan_Chin_MS.pdf: 78643860 bytes, checksum: 01b61da906aab57d653dd06f5c37e7ec (MD5) Pan_Chin_MS_ABS.pdf: 1032444 bytes, checksum: 9c409d164a3bbfcf43be71fe5184e4ea (MD5) license.txt: 4813 bytes, checksum: …
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Voltages induced upon telephone lines near three phase transmission lines
Made available in DSpace on 2014-09-18T16:20:56Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) voltagesinducedu00hump.pdf: 2247756 bytes, checksum: 45afad273d7f374859b5b2b557e12d7c (MD5) Previous issue date: 1917
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Magnetic Resonance Studies of Three-Phase Heterogeneous Catalytic Hydrogenation Reactions
… for characterizing and studying continuous three-phase catalytic reactions.
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DSP controlled three phase to single phase uninterruptible power supply
… problem of balancing a large number of single phase loads onto a three phase supply, such as in a large computer network. This has resulted in more frequent supply voltage failure, causing substantial data and financial loss and in the extreme case death due to hospital equipment not being …
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