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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Cal Poly SuPER system photovoltaic array universal DC-DC step down converter : a thesis /

Witts, Joseph. Harris, James G. January 2008 (has links)
Thesis (M.S.)--California Polytechnic State University, 2008. / "June 2008." "In partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering." "Presented to the faculty of California Polytechnic State University, San Luis Obispo." Major professor: James Harris, Ph.D. Includes bibliographical references (leaves 70-72). Also available online and on microfiche (2 sheets).
122

Novel current-fed boundary-mode parallel-resonant push-pull converter a thesis /

Paolucci, Jonathan David. Taufik. January 1900 (has links)
Thesis (M.S.)--California Polytechnic State University, 2009. / Title from PDF title page; viewed on July 2, 2009. "June 2009." "In partial fulfillment of the requirements for the degree [of] Master of Science in Electrical Engineering." "Presented to the faculty of California Polytechnic State University, San Luis Obispo." Major professor: Taufik, Ph.D. Includes bibliographical references (p. 97-98).
123

Design and implementation of a high-power resonant DC-DC converter module for a reduced-scale prototype integrated power system /

Whitcomb, Bryan D. January 2001 (has links) (PDF)
Thesis (Electrical Engineer)--Naval Postgraduate School, September 2001. / Thesis Advisor(s): Robert W. Ashton, John G. Ciezki, Todd R. Weatherford. Includes bibliographical references (p. 175-177). Also available online.
124

Area efficient charge pumps and post low dropout regulators /

Ying, Tianrui. January 2002 (has links)
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2002. / Includes bibliographical references. Also available in electronic version. Access restricted to campus users.
125

Analysis & design of improved multiphase interleaving DC-DC converter with input-output bypass capacitor a thesis /

Rudianto, Ridi, January 1900 (has links)
Thesis (M.S.)--California Polytechnic State University, 2009. / Title from PDF title page; viewed on August 11, 2009. Major professor: Taufik, Ph.D. "Presented to the faculty of the College of Engineering, California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree [of] Master of Science in Electrical Engineering." "June 11, 2009." Includes bibliographical references (p. 58-59). Will also be available on microfiche.
126

Effect of DC to DC converters on organic solar cell arrays for powering DC loads

Trotter, Matthew S. January 2009 (has links)
Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Gregory Durgin; Committee Member: Andrew Peterson; Committee Member: Bernard Kippelen.
127

High voltage resonant self-tracking current-fed converter a thesis /

McClusky, Scott Logan. Taufik. January 1900 (has links)
Thesis (M.S.)--California Polytechnic State University, 2010. / Title from PDF title page; viewed on May 3, 2010. Major professor: Taufik, Ph.D. "Presented to the faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree [of] Master of Science in Electrical Engineering." "March 2010." Includes bibliographical references (p. 130-135).
128

A battery equalisation system for electric vehicle : a thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering at the University of Canterbury, Christchurch, New Zealand /

Hsieh, Ming-Kuang Leo. January 1900 (has links)
Thesis (M.E.)--University of Canterbury, 2007. / Typescript (photocopy). "09 July 2007." Includes bibliographical references. Also available via the World Wide Web.
129

Εξαγωγή DC παραμέτρων ηλιακών κυττάρων πολυκρυσταλλικού πυριτίου υπό φωτισμό σε πραγματικές συνθήκες λειτουργίας και εφαρμογή

Μέριανου, Αναστασία 16 June 2011 (has links)
Στην παρούσα διπλωματική εργασία μελετάται η λειτουργία φωτοβολταϊκών πλαισίων πολυκρυσταλλικού πυριτίου και συγκεκριμένα γίνεται εξαγωγή των dc παραμέτρων (ηλεκτρικά χαρακτηριστικά) του συγκεκριμένου τύπου φωτοβολταϊκού πλαισίου υπό φωτισμό σε πραγματικές συνθήκες λειτουργίας. Αρχικά παρατίθεται η θεωρία για τα ηλιακά κύτταρα που είναι η βασική δομική μονάδα του φωτοβολταϊκού πλαισίου. Για να μπορεί να γίνει εύκολα αντιληπτό σε όλους το φωτοβολταϊκό φαινόμενο, δίδεται μια διεξοδική περιγραφή της λειτουργίας της p-n επαφής. Παράλληλα, μελετώνται κάποια προβλήματα που μπορεί να προκύψουν στις φωτοβολταϊκές εγκαταστάσεις και οι πιθανοί τρόποι σύνδεσης μιας οικιακής εγκατάστασης. Στην συνέχεια ακολουθεί το πειραματικό μέρος. Σε αυτό παρουσιάζεται μια σειρά μετρήσεων που διεξήχθησαν κατά την διάρκεια του ακαδημαικού έτους 2008-2009 και η χάραξη γραφικών παραστάσεων μέσω των οποίων καταδεικνύεται πόσο επηρεάζεται η λειτουργία των φωτοβολταϊκών πλαισίων από κάποιους περιβαλλοντικούς παράγοντες σε διαφορετικές εποχές. Τα συμπεράσματα που προέκυψαν από την πειραματική διαδικασία παρέχουν γνώση για την μελέτη μιας πραγματικής εγκατάστασης στην περιοχή της Πάτρας. Το πιο σημαντικό αποτέλεσμα είναι η ετήσια συνολική αποδιδόμενη ενέργεια από το πλαίσιο πολυκρυσταλλικού πυριτίου των 80W σε κλίση 38 μοίρες στην περιοχή της Πάτρας που είναι 98 KWh/έτος. Στη μελέτη αυτή περιλαμβάνεται και μια πρόταση εγκατάστασης φωτοβολταϊκών στην ταράτσα της φοιτητικής εστίας του Πανεπιστημίου Πατρών. Λαμβάνοντας υπόψιν μας τις ενεργειακές ανάγκες της φοιτητικής εστίας, έγινε προσπάθεια να βρεθεί μια λύση τοποθέτησης των φωτοβολταϊκών πλαισίων, έτσι ώστε το σύστημά μας να είναι λειτουργικό καλύπτωντας όσο το δυνατό τις ανάγκες για ηλεκτρική ενέργεια. Θεωρείται όμως αναγκαίο να αναφερθεί οτι οι πειραματικές μετρήσεις στις οποίες στηρίζεται η μελέτη αυτή συνιστούν ένα μέρος μόνο των μετρήσεων οι οποίες απαιτούνται για την πλήρη ανάπτυξη και διερεύνηση του θέματος που πραγματεύεται η παρούσα Διπλωματική εργασία. / The present thesis studies the operation of polycrystalline silicon solar modules and concretely the export of dc parameters (electric characteristics) of the particular type of solar module under real conditions of operation. Initially, the thesis mentions the theory of the solar cells that are the basic structural unit of solar modules. In order the photovoltaic phenomenon, to be easier understood to all people, an extensive description of operation of p-n junctions is given. At the same time, certain problems which come out in photovoltaic installations are studied and the likely ways of connection of domestic installation. Then, the experimental part follows. At this part, a group of measurements are presented which were made at the duration of academic year 2008-2009 and the mapping out of graphic representations, which shows the influence of the operation of solar modules from certain environmental factors per season. The results that came out from the experimental process constitute knowledge for the study of a real installation at the region of Patras-Greece. The most important result is the annual total energy yield from polycrystalline silicon solar module of 80W αt tilt angle 38 degrees at Patras being 98 KWh/year. It is included in this study an indicative photovoltaic installation at the flat-roof of students‟ housing of University of Patras. Knowing the energy needs of students‟ housing, we try to find a solution of placement of solar modules, so our system to be functional as long as possible for the needs for electric energy. It is however necessary to mention that the experimental measurements on which this study is built constitute a part only of the measurements required for the full development and investigation of the issue addressed by this thesis.
130

Digitally Controlled Average Current Mode Buck Converter

January 2011 (has links)
abstract: During the past decade, different kinds of fancy functions are developed in portable electronic devices. This trend triggers the research of how to enhance battery lifetime to meet the requirement of fast growing demand of power in portable devices. DC-DC converter is the connection configuration between the battery and the functional circuitry. A good design of DC-DC converter will maximize the power efficiency and stabilize the power supply of following stages. As the representative of the DC-DC converter, Buck converter, which is a step down DC-DC converter that the output voltage level is smaller than the input voltage level, is the best-fit sample to start with. Digital control for DC-DC converters reduces noise sensitivity and enhances process, voltage and temperature (PVT) tolerance compared with analog control method. Also it will reduce the chip area and cost correspondingly. In battery-friendly perspective, current mode control has its advantage in over-current protection and parallel current sharing, which can form different structures to extend battery lifetime. In the thesis, the method to implement digitally average current mode control is introduced; including the FPGA based digital controller design flow. Based on the behavioral model of the close loop Buck converter with digital current control, the first FPGA based average current mode controller is burned into board and tested. With the analysis, the design metric of average current mode control is provided in the study. This will be the guideline of the parallel structure of future research. / Dissertation/Thesis / M.S. Electrical Engineering 2011

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