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 13 of 13 for “"GTO"”.
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Two way power flow using GTO thyristors
… a new idea was introduced by connecting two GTOs antiparallel instead of a diode and a GTO. A single phase system using two GTO converters which are connected in series was built. One converter operates as a rectifier and the other converter operates as an inverter. In the case of the …
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Innovative GTO Thyristor Based Switches Through Unity Gain Turn-Off
The Gate Turn-Off (GTO) Thyristor has the best voltage blocking and current conducting capabilities among all known high power semiconductor devices. To improve its dynamic performances to meet the increased demand in high-performance high-power applications, a special driving technique, namely …
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Advanced Semiconductor Device and Topology for High Power Current Source Converter
… either a symmetrical gate turn-off (GTO) thyritor or an asymmetrical GTO in series with a diode is used as the power switch in the CSC. Since the GTO has a lower switching speed and requires a complicated gate driver, the symmetrical GTO based CSC usually has low dynamic response …
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Nanostructures for protection and vehiculation of bioactive molecules
… a technical grade soy lecithin (LCT), triolein (GTO) and water (W). The first system investigated is a novel cationic liposome nanocarrier, having interesting performance in topical drug delivery. Both monoolein and lauroylcholine chloride, due to their high biocompatibility, can be regarded as …
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Application of High-Power Snubberless Semiconductor Switches in High-Frequency PWM Converters
… including the thyristor and the Gate Turn-Off (GTO) thyristor, had the capacity to handle very high voltages and currents but lacked the ability to perform high frequency switching. Low-power converters, such as computer power supplies and low horsepower motor drives, have employed …
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Isotopes as a Tool for Exploring Exoplanet Atmospheres
… exoplanets. In preparation for the JWST GTO Exoplanet Transit Spectroscopy team’s observations of TRAPPIST-1 e (PI: N. Lewis), I evaluate which atmospheric scenarios we will be able to constrain with our limited data. The four transits of our GTO Program will permit initial reconnaissance …
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Resveratrol Nanostructured Lipid Carrier for targeted delivery to breast cancer
… testing of NLCs, nanoparticles formulated with GTO as a liquid lipid showed good stability and therefore was taken forward for further PEGylating and surface modification with three ligands; hyaluronic acid, folic acid and combination of both ligand in order to impart targetability for breast …
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Optimal control techniques for multimode propulsion mission design in cislunar space
… transfer from a geostationary transfer orbit (GTO) to geostationary orbit (GEO) that was solved using MEE and forward single shooting. Finally, note that the techniques developed here are agnostic to the propulsion system. As a result, the methods apply equally well for spacecraft with hybrid …
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Generalized multi-commodity network flows : case studies in space logistics and complex infrastructure systems
… scenario with two "gateway" resource depots at GTO and DTO with orbital transfer vehicles (OTVs) running in the cislunar and Martian systems. Then we solve variant problems that have different settings to see the effect of each factor. Findings include: taking advantage of oxygen-rich ISRU, …
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The study of the upgrade and improvement of power electronics protection system for locomotives
A dissertation submitted in fulfillment of the requirements for the Master of Engineering Degree in Electrical Power Engineering, Durban University of Technology, Durban, South Africa, 2023.
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Development of the Advanced Emitter Turn-Off (ETO) Thyristor
Advancements in the power electronics systems have been directly related to the availability of improved power semiconductor devices. The device performance greatly determines the efficiency, reliability, volume, and cost of the power electronics system. This dissertation is dedicated to develop an …