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 99 for “"3-Phase"”.
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3-Phase gate-turn off thyristor inverter
The requirements of a standard 3-phase Induction Motor driven by a Voltage Source Inverter (VSI) are studied. A full 3-phase Variable Speed Drive (VSD) and its controller have been designed, constructed and tested. Gate Turn-Off Thyristors (GTO's) are used as the main switching elements in the …
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A configurable 3-phase machine for laboratory instruction
… aids for laboratory classes. The first is a 3-phase axial-flux machine which can be configured as a permanent-magnet or induction machine with moderate effort for teaching about power electronics. The second is an introductory robot which demonstrates and controls electromagnetic actuators for …
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Development of 3-phase inverter with PID voltage control
… signal from PID controller and fed to the three-phase inverter with filter to give a sinusoidal output. Based on the result obtained, the three-phase inverter has successfully created a stable sinusoidal voltage output for any given 3 voltage 7 references 7 by utilizing $ the ADC module and the …
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Protection Against Ungrounded Single Phase Open Circuit Faults in 3-Phase Distribution Transformers
… thesis explores the impacts and behavior of 3-phase distribution transformers when subject to ungrounded single phase open circuit faults. A simple 3-phase system is modeled using MATLAB Simulink and operation under fault conditions are simulated and studied. Simulation results are confirmed …
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Definition of Apparent Power in 3-Phase 4-Wire Non-Sinusoidal Power Systems
… interpretation. The new approach to three phase power theory has significant potential for education, the practical design of active compensators, and the revision of international standard definitions of power.
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A 3-phase Z-source inverter driven by a novel hybrid switching algorithm
A 3-phase Z-source inverter has been researched, designed, simulated, builtand tested. The purpose of the inverter is to deliver 3-phase 400 VAC from aDC supply that can vary over a range of 20 to 70 Vdc. This is done with a Zsourceinverter topology which is a single conversion method with no …
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Definition of apparent power in 3-phase 4-wire non-sinusoidal power systems
… interpretation. The new approach to three phase power theory has significant potential for education, the practical design of active compensators, and the revision of international standard definitions of power.
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Control signal transmission through power supply cables of a 3-phase PWM motor
Modem process control systems often employ accurate position or speed controlled PWM motors, which require feedback data for the drive control loop. Current methods require an independently shielded cable for feedback data transmission. This is due to the fact that high-voltage PWM signals could …
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Evaluating the Time-Dependent Melting Behavior of Semicrystalline Polymers Through Strobl's 3-Phase Model
… are explored in the context of Stroblâ "s 3-Phase model using differential scanning calorimetry (DSC), small angle X-ray scattering (SAXS), and wide angle X-ray diffraction. DSC experiments confirm the existence of a crystallization time-dependent low endotherm, and …
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Development and Prototyping of a Ground Fault Circuit Interrupter for 3-Phase 480 Volt Systems
… difficulties encountered in low-voltage three phase ground fault current detection, and adopts a previously patented tripping scheme to develop and prototype a digital relay for 3-phase 480 volt systems capable of the sensitivity and speed required for personnel safety. Results demonstrate the …
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Development of direct torque control with neural network for speed change in 3-phase induction motor
… in order to control the speed of the three-phase induction motor. This project will developed using MATLAB software to simulate the outcome for the module designed. The NN controller have to be designed and tuned properly. This project focus on the simulation of modelling the three-phase …
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Design of a 350 kW Silicon Carbide Based 3-phase Inverter with Ultra-Low Parasitic Inductance
… a low parasitic inductance, high power density 3-phase inverter using silicon-carbide power modules for traction application in the electric vehicles with a power rating of 350 kW. With the market share of electric vehicles continuing to grow, there is a great opportunity for wide bandgap …
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Development of repetitive current controller using raspberry PI for 3 phase active power filter for nonlinear load improvement
… to compensate the distorted current in the three phase power supply by using active power filter (APF). The APF used is three phase bridge inverter which converts DC to AC waveform. The inverter use Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The Raspberry Pi board is used to …
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3-Phase 4-Leg(3P4L) converters control for massive electric energy storage systems integration in low voltage grids
La necesidad de abandonar la producción eléctrica basada en combustibles fósiles altamente contaminantes está propiciando un cambio en el sistema eléctrico mundial, moviéndose de un sistema centralizado hacia una generación distribuida formada por generadores basados en energías renovables (paneles …
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Development of one cycle current controller using raspberry Pi for 3 phase active power filter for nonlinear load improvement
… current control (OCC) using Raspberry Pi for 3 phases Active Power Filter where the main objective are to harmonic elimination and power quality improvement. The model was perform in MATLAB/Simulink and also implements the hardware by using Raspberry Pi as a digital signal processing system. The …
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High frequency AC power converter for low voltage circuits
… is suitable for VHF frequency (50-100MHz) polyphase AC/DC power conversion in low voltage integrated circuits. A complete AC power delivery architecture was evaluated demonstrating the benefits of delivering power across the interconnect at high voltage and lower current with on- or over-die …
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Control Applications and Economic Evaluations of Distributed Series Reactors in Unbalanced Electrical Transmission Systems
… transmission system. DSRs can be used to balance phase flows in a single line as well as to control the distribution of flow in parallel flow paths. This dissertation investigates the Design of Distributed Series Reactors (DSRs) on transmission lines and provide guidelines and considerations for …
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A Mathematical Programming Based Procedure for the Scheduling of Lots in a Wafer Fab
… formulated as an integer linear program, and a 3-phase procedure, which utilizes a variation of the Wilkerson-Irwin algorithm, is developed. The performance of this 3-phase procedure is further improved by using insights from classical scheduling theory. The scheduling problem is formulated as a …
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A one-way coupled DEM-CFD scheme to mode free-surface flows in tumbling mills
… description of the system requires two fluid phases (for slurry and air) and one solid phase (for the charge). Existing 3-phase work makes use of a purely particle-based description, coupling the discrete element method (DEM) for the solids with smoothed particle hydrodynamics (SPH) for the …
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