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 583 for “"single phase"”.
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Analysis of single-phase rectifier circuits
The single-phase rectifier filter circuits, including the half- and full-wave rectifiers with a capacitor and full-wave rectification with either a series inductor or a choke-input filter, have been analyzed taking into account the voltage drop across the tube and the transformer. In these analyses …
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Supply-friendly single phase uninteruptible power supply
Uninterruptible power supplies (UPS) maintain a constant supply of power to a critical load. The distinguishing features are a fixed voltage and frequency, low harmonic content and the ability to supply the load for a period of time after the incoming supply has failed. The document begins by …
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Modeling single-phase flow and solute transport across scales
… two Eulerian pore-network models for simulating single-phase flow and solute transport are developed. The models focus on capturing two key pore-level mechanisms: a) partial mixing within pores (large void volumes), and b) shear dispersion within throats (narrow constrictions connecting the …
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Chemical selection rules of single-phase high-entropy oxides
… usually form composites instead of a single-phase, solid solution. In this research, twenty high-entropy lanthanide candidates were synthesized and examined to explore the function of two potential parameters: (1) cation size mismatch, and (2) preferred valence states. The oxide …
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Single-Phase Bi-directional Ćuk Inverter for Battery Applications
Bidirectional inverters are widely applied in photovoltaic and wind systems that require battery power backup. They are advantageous over unidirectional inverters because of their ability to convert DC power into AC power and then AC power back into DC power to recharge for storage purposes. …
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Optimum design of a static single-phase frequency tripler
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1955.
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Analysis and observation of grid connected single phase inverter integration
A single-phase grid connected with a photovoltaic (PV) power system that will provide high voltage gain with state model analysis for the control of the system has been presented. In addition to the solar panels, the system is equipped with a dc–dc converter, which allows the panels’ maximum power …
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Parameter estimation for single-phase induction motor from transient measurements
… a methodology to estimate the parameters of single-phase induction motors (SPIMs). The parameter estimates are suitable to model the responses of SPIMs in both steadystate and transient conditions. Firstly, they are calculated from multiple sets of steady-state test-based measurements using …
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DSP controlled three phase to single phase uninterruptible power supply
… is the 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 …
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Design and implementation of a single phase active power filter
Various active filter solutions have been proposed in recent years {I], {2], and are still being widely investigated today. This thesis discusses the design and implementation of the shunt AP F topology.
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Surface acoustic wave single-phase unidirectional transducers and phase weighting
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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Modeling and Control of a Six-Switch Single-Phase Inverter
… and cost competitive system. The six-switch single-phase inverter proposed in this thesis is a prime candidate for use in single households and small businesses. Its compact size and compatibility with existing electrical standards make its integration easy. However, little work is available …
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Single-phase vs. Three-phase High Power High Frequency Transformers
… thesis proposes one comparison methodology for single and three-phase high power high frequency transformers in power conversion systems. The objective is to compare the volume of the transformers. And single and three-phase Dual Active Bridge Converter (DAB1 and DAB3) topologies with single and …
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Development of a single phase active Power filter for rectifier load
This project presents the employment of a single-phase active power filter (APF) to compensate harmonics generated by battery charger. The presence of the harmonics leads to various problems and poor power quality. The objectives of this project are to reduce the harmonic distortion of the …
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The parallel connection of single phase DC to AC power converters
… (iii) the quality of the power they produce. A single-phase converter module and a parallel connection circuit is proposed that meets these three objectives by using a fast control circuit for each converter, insulated-gate bipolar transistors (IGBTs), a high switching frequency (10 kHz to 20 …
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Single phase trapezoidal AC power supplies for hybrid fiber/coax networks
Single phase ac power supplies are used to power hybrid fiber/coax (HFC) networks. These power supplies are required to produce a trapezoidal-shaped voltage waveform. Conventional power supplies having a front-end diode bridge rectifier and a large dc bus capacitor are an unacceptable approach for …
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Reliability analysis of single-phase photovoltaic inverters with reactive power support
… to be an emerging ancillary requirement for single-phase photovoltaic (PV) inverters. This work assesses related reliability issues and focuses on the second stage or inversion process in PV inverters. Three PV inverter topologies are analyzed and their reliability is determined on a …
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Transient currents of polyphase induction motors with a single-phase supply
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1927
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Single Phase Power Factor Correction Circuit with Wide Output Voltage Range
… with a wide output voltage range is needed. A single phase power factor correction circuit with wide output voltage range is developed in this work. After a comparison of two main power stage candidates (Buck+Boost and Sepic) in terms of efficiency, complexity, cost and device rating, the …
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System Identification and Adaptive Control for Grid-Connected Single-Phase AC Inverters
… the stability and performance of grid-tied single-phase inverter systems. There are three main control systems involved in the conversion of DC to AC power: a synchronizer, a current-controller, and a DC-bus controller. The focus of this thesis is to create a control system which responds to …
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