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.
Results
Showing 1 to 20 of 176 for “"Three-level"”.
-
Analysis, simulation and modeling of three-level VSIs
Analysis of three-phase, three-level VSIs is done for high-power high-voltage applications. Complete Space Vector Modulation (SVM) algorithm is developed for a three-phase, three-level converter. Special attention is given to minimization of output ripple and voltage balance of the dc-link input …
-
Power and Sample Size for Three-Level Cluster Designs
… sample size for cluster designs with one and two levels are abundant, the evaluation of required sample size for three-level designs has been generally overlooked. First, the nesting effect introduces more than one intracluster correlation into the model. Second, the variance structure of the …
-
Predicting drug interactions with a three level causal model
… traces causal paths of drug action through up to three levels of drug action. The three levels which are molecular/receptor level, physiological level and clinical level provide both deep and shallow reasoning in order to overcome the problem of unknowns in medical expert systems. Sparsity of …
-
Study on Three-level DC/DC Converter with Coupled Inductors
High power multi-level converters are deemed as the mainstay power conversion technology for renewable energy systems including the battery storage system, PV farm and electrical vehicle charge station. This thesis is focused on the study of three-level DC/DC converter with multi-phase interleaved …
-
Magic Trapping of a Three-Level System for Rydberg Quantum Computation
For over a decade, enormous e ort has been invested towards building a practical quantum computer. Such a machine promises to revolutionize scienti c computing, but there are many challenges to be overcome. The dominant problem for most proposals is decoherence: random and uncontrollable loss of …
-
Space Vector Pwm Techniques for Six_Phase Three-Level Inverter-Fed Drives
… in the power converter. Additionally, if a multilevel inverter is used to drive the machine, the output voltage waveforms are going to be approximated closer toward sinusoidal waveforms, thus resulting in lower total harmonic distortion. Therefore, the combination of multiphase and multilevel …
-
An on-chip three-level boost converter for energy harvesting application
The first on-chip three-level boost converter with 0.28 mm2 die size is implemented using 65 nm CMOS technology. Leveraging the advantages of hybrid switched capacitor converters, the converter manages to provide a maximum output voltage of 4.5 V with the available 2.5 V devices in this technology. …
-
Causal and statistical analyses of dithered systems containing three-level quantizers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1959.
-
An Efficient Parallel Three-Level Preconditioner for Linear Partial Differential Equations
… linear elliptic partial differential equations. Three preconditioners are studied: block-Jacobi preconditioner (BJ), a two-level tangential preconditioner (D0), and a three-level preconditioner (D1). Performance and scalability on a distributed memory parallel computer are considered. …
-
Modeling and Simulation of a Cascaded Three-Level Converter-Based SSSC
… (SSSC) systems utilizing cascaded-multilevel converters (CMCs). Among flexible AC transmission system (FACTS) controllers, the SSSC has shown feasibility in terms of cost-effectiveness in a wide range of problem-solving abilities from transmission to distribution levels. Referring to the …
-
A Virtual Space Vectors based Model Predictive Control for Three-Level Converters
<p>Three-phase three-level (3-L) voltage source converters (VSC), e.g., neutral-point clamped (NPC) converters, T-type converters, etc., have been deemed to be suitable for a wide range of medium- to high-power applications in microgrids (MGs) and bulk power systems. Compared to their two-level …
-
A Cross-national Study of Mathematics Achievement Via Three-level Multilevel Models
… investigated the nature and magnitude of student-level (level 1), school-level (level 2), and country-level (level 3) factors that are associated with math achievement. The Program for International Student Assessment (PISA) 2018 datasets were used. The main predictors focusing on this study …
-
A High Power Density Three-level Parallel Resonant Converter for Capacitor Charging
… a high-power, high-frequency and high-density three-level parallel resonant converter for capacitor charging. DC-DC pulsed power converters are widely used in military and medical systems, where the power density requirement is often stringent. The primary means for reducing the power converter …
-
Design and Implementation of A Three-Level Boost converter for Battery Impedance Spectroscopy
… explores the low current ripple advantage of a threelevel boost converter to implement EIS on lithium ion battery.
-
A three-level buck converter to regulate a high-voltage DC-to-AC inverter
A three-level buck converter is designed and analyzed, and shown to be suitable as a high-voltage down converter as a pre-regulation stage for a 600 watt DC-to-AC power inverter. Topology selection for the inverter is examined, and a three-stage system is chosen to satisfy high voltage (1.1 kV), …
-
Design and Validation of A High-Power, High Density All Silicon Carbide Three-Level Inverter
… increasing semiconductor reliability. The system-level design and trade-off is also analyzed and illustrated by using a 250kW three-level T-type neutral-point clamped converter. The design has reached high efficiency and high-power density. The converter system is also evaluated through …
-
Modeling and Design of a SiC Zero Common-Mode Voltage Three-Level DC/DC Converter
… for a battery interface in a UPS system. A three-level NPC topology was explored for its potential benefit in terms of noise, efficiency, and additional features. This converter topology was modeled, simulated, and a hardware prototype constructed for evaluation within a UPS system, although …
-
Sensorless control of an interior permanent magnet synchronous motor with a three level t-type inverter
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
-
Digital-Based Zero-Current Switching (ZCS) Control Schemes for Three-Level Boost Power-Factor Correction (PFC) Converter
… Among various boost-family PFC topologies, three-level boost (TLB) converter has generated considerable research interest in high-voltage high-power applications. It is mainly due to the fact that the topology can have halved component voltage stresses, improved waveform qualities and …
Page 1 of 9