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 1141 for “"Synchronous"”.
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Synchronization and synchronous devices
Object: To construct a synchroscope for use in the Electrical Engineering Laboratory. This synchroscope is to be small and a very compact unit, which will be portable and of such sturdy construction that it will not be damaged by the frequent handling of students. Method: After a thorough research …
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Participating in Synchronous Online Education
… type of distance education. It mainly relies on asynchronous communication although it is well known that many students regard the lack of synchronous communication as disadvantageous. This thesis aims to achieve a deeper understanding of how, why and when synchronous communication, as a …
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Sixteen-pole programmable synchronous switch
A new microprocessor based synchronous switch has been developed at Virginia Tech as an improvement on the customary solid state electronic or mechanical switch. The author designed and built a 16-pole synchronous switch using a 16 bit microprocessor to provide programmable control on both the …
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Compensating for the effects of reduced synchronous inertia on frequency stability using virtual synchronous generators
… grid has traditionally been dominated by large synchronous generators which have provided frequency stability through their inertia and governor responses. As more renewable energy sources (RES), particularly wind and solar, are added to the grid, they displace synchronous generators. Many of …
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Diachronous vs. Synchronous Study of Obsolescence
… comparison of two ways of measuring obsolescene--synchronous and diachronous--within the subject of human and medical genetics. Synchronous studies are made on records of use or bibliographic references made at one point in time and compare the use against the age dis
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Cyber-Resilient Control of Synchronous Condensers
… control and detection frameworks for synchronous condensers (SC). The research establishes robust exciter control algorithms that effectively address nonlinear dynamics and measurement uncertainties present in weak grid environments while simultaneously developing advanced techniques …
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High Voltage Synchronous Rectifier Design Considerations
… during this high voltage transition is the synchronous rectifier, which is traditionally designed as an afterthought. Prior research in synchronous rectifiers have been limited to low voltage, high current converters. There is practically no research in high voltage synchronous …
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Protection of synchronous generators and induction generators
… Based Protection) that can protect the synchronous generators and induction generators securely and dependably when they have internal faults. Specifically, the EBP function monitors the consistency between the generator measurements and the generator dynamic model via dynamic state …
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A mathematical theory of synchronous concurrent algorithms
A synchronous concurrent algorithm is an algorithm that is described as a network of intercommunicating processes or modules whose concurrent actions are synchronised with respect to a global clock. Synchronous algorithms include systolic algorithms; these are algorithms that are well-suited to …
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Globally-asynchronous, Locally-synchronous Wrapper Configurations For
Globally-Asynchronous, Locally-Synchronous (GALS) design techniques employ the finer points of synchronous and asynchronous design methods to eliminate problems arising due to clock distribution, power dissipation, and large area over head. With the recent rise in the demand for System-on-a-Chip …
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Transient analysis of six-phase synchronous machines
Six-phase synchronous machines have been used in the past for high power generation, and presently are being used in high power electric drives and in ac and/or dc power supplies. This thesis presents a mathematical model for investigating the transient performance of a six-phase synchronous …
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Torque estimation in permanent magnet synchronous machines
El uso de máquinas síncronas de imanes permanentes ha aumentado notablemente en aplicaciones industriales y de tracción eléctrica durante las últimas décadas, debido a su mejor comportamiento sobre otros tipos de motores eléctricos en aspectos clave como son la densidad de potencia, densidad de …
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Higher-order thinking in synchronous online discussion
… thinking skills in COMP and TCOM students’ synchronous online discussion, where higher-order thinking skills were measured in students’ writing throughout a dynamic process as well as from a final product. Using the revision of Bloom’s Taxonomy of Educational Objectives in English …
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Data Chunking in Quasi-synchronous DS-CDMA
… most commercial DS-CDMA networks utilize an asynchronous reverse link resulting in a reduced user capacity. A possible compromise to increase the user capacity in the reverse link is to implement a quasi-synchronous timing scheme, a timing scheme in which users are allowed to be slightly out …
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Hardware Synthesis of Synchronous Data Flow Models
<p>Synchronous Dataflow (SDF) graphs are a convenient way to represent many signal processing and dataflow operations. Nodes within SDF graphs represent computation while arcs represent dependencies between nodes. Using a graph representation, SDF graphs formally specify a dataflow algorithm …
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Synchronous failure diagnosis of discrete-event systems
… the system. We also introduce the de nition of synchronous diagnosability of the language of a system with respect to the languages of its modules, and present an algorithm to verify this property. We also propose a decentralized synchronized Petri net diagnosis scheme for discrete-event systems …
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New Sensorless Permanent Magnet Synchronous Motor Drive
In permanent magnet synchronous motor (PMSM) drives, magnetic-saliency-based techniques have been widely used to detect rotor position and speed, especially during the starting and low-speed operations. Among these techniques, pulsating high-frequency signal injection (PHFSI) stands out as a …
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Direct digital control of a synchronous machine
… affecting the operation of a variable speed synchronous machine drive.
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Synchronous communication techniques for rationally clocked systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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