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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.
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Showing 11 to 12 of 12 (0.121 seconds)Spelling suggestions: "subject:"alectric current converters -- design"" "subject:"alectric current converters -- 1design""
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A new family of dc-dc-ac power electronics convertersDarabi, Mostafa January 2014 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / This thesis proposes a family of non-isolated bidirectional converter in order to
interface dc and ac variables. Such power electronics solutions guarantee: (i) bidirectional
power flow between dc and ac converter sides, (ii) independent control in both
converter sides, (iii) high level of integration with a reduction of one power switch
and its drive circuits, (iv) implementation of two functions by using a unique power
conversion stage and (v) reduction of the capacitor losses. Despite proposing new
power converter solutions, this thesis presents an analysis of the converters in terms
of pulse-width-modulation (PWM) strategy, dc-link capacitor variables, and suitable
a control approach.
Solutions for single-phase, three-phase and three-phase four-wire systems are proposed
by employing a converter leg with three switches. A possible application of
this converter is in Vehicle-to-Grid (V2G) systems and interfacing dc microgrid with
a utility grid.
In addition to the new power electronics converters proposed in this thesis, an
experimental setup has been developed for validation of the simulated outcomes. The
proof-of-concept experimental setup is constituted by: DSP, Drivers & Integrating
Board, Power Supply and, Power Converter & Heat-Sink .
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| 12 |
A non-conventional multilevel flying-capacitor converter topologyGulpinar, Feyzullah January 2014 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / This research proposes state-of-the-art multilevel converter topologies and their
modulation strategies, the implementation of a conventional flying-capacitor converter
topology up to four-level, and a new four-level flying-capacitor H-Bridge converter
confi guration. The three phase version of this proposed four-level flying-capacitor
H-Bridge converter is given as well in this study. The highlighted advantages of the
proposed converter are as following: (1) the same blocking voltage for all switches
employed in the con figuration, (2) no capacitor midpoint connection is needed, (3)
reduced number of passive elements as compared to the conventional solution, (4)
reduced total dc source value by comparison with the conventional topology.
The proposed four-level capacitor-clamped H-Bridge converter can be utilized as
a multilevel inverter application in an electri fied railway system, or in hybrid electric
vehicles.
In addition to the implementation of the proposed topology in this research, its
experimental setup has been designed to validate the simulation results of the given
converter topologies.
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