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Filtering by: Creator Webb, Molly A. H. Remove constraint Creator: Webb, Molly A. H. Committee Member Shor, Molly Remove constraint Committee Member: Shor, Molly

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  • A remotely controlled power quality test platform for characterizing the ride-through capabilities of adjustable speed drives

    Creator:
    Matheson, Evelyn
    Abstract:
    With the increased attention on high efficiency and controllability of industrial processes, as well as reduced weight, volume and cost of consumer products, the applications of nonlinear power electronic converters such as adjustable speed drives (ASDs) are showing a rapid rise. Power Quality (PQ) is becoming an increasing concern with...
    Resource Type:
    Masters Thesis
    Full Text:
    calculated as a percentage for either a voltage or current waveform. THD= h=2 xl00% (1.1) I' The magnitude

  • The implicit derivative matching technique for Maxwell's equations in complex heterogeneous media

    Creator:
    Kirk, Anna Rae
    Abstract:
    We construct an implicit derivative matching (IDM) technique for restoring the accuracy of the Yee scheme for Maxwell's equations in dispersive media with material interfaces in one dimension. We consider media exhibiting orientational polarization, which are represented using a Debye dispersive model, examples of which are water and living tissue....
    Resource Type:
    Masters Thesis
    Full Text:
    step before and on either side, i.e. H n+ 1 2 j− 1 2 and H n+ 1 2 j+ 1 2 . A similar situation

  • Development of a variable-speed, doubly-fed wind power generation system

    Creator:
    Brune, Christopher S.
    Abstract:
    Generation of electricity from the wind is becoming increasing popular as an environmentally responsible resource. Current methods for generating electricity from the wind involve the use of fixed-speed generators. However, the use of variable-speed generators increases the amount of energy that can be extracted from the wind. Most variable-speed technologies...
    Resource Type:
    Masters Thesis
    Full Text:
    . Molly Shor, Dr. Alan Wallace, and Dr. Bill Warnes. A special thanks goes to my colleague Brian Wiley

  • Active power filter for the cancellation of harmonic line current distortion

    Creator:
    Merk, Marcel
    Abstract:
    With the increased attention on high efficiency and energy savings, power electronic energy conversion equipment is increasingly incorporated in all levels of the power system. The drawback of such equipment is the generation of nonsinusoidal currents in the power distribution network due to the nonlinear operation. Harmonic currents may distort...
    Resource Type:
    Masters Thesis
    Full Text:
    of the current. A similar index T H Dv can be expressed by using voltage components in (1.1). The

  • Scaled modeling and simulation of ocean wave linear generator buoy systems

    Creator:
    Gore, Ganesh P.
    Abstract:
    Accurate scaled modeling and simulation are critical to advancing ocean wave linear generator buoys. A 100th scaled model of ocean wave generator buoy systems is analyzed by solving the Navier-Stokes equations. These equations are numerically solved using Computational Fluid Dynamics (CFD) by implementing the front capturing method. In this thesis,...
    Resource Type:
    Masters Thesis
    Full Text:
    Density of water, kg/m3 a Wave magnitude, m H Wave height m T Wave period, sec ω Wave

  • Three-dimensional finite element design procedure for the brushless doubly fed machine

    Creator:
    Thompson, Brenda E.
    Abstract:
    Brushless Doubly Fed Machines (BDFM) have potential advantages in variable speed generation and adjustable speed drive applications. The most significant of these advantages is a reduction in the power electronic converter rating, and therefore a reduction in overall system cost. Presently, efforts are being directed at optimizing the design of...
    Resource Type:
    Masters Thesis
    Full Text:
    ac analysis module is a linear analysis module that does not take into account the B - H curve of

  • Passively controlled variable-speed generator system

    Creator:
    Bathon, Tobias Siegfried
    Abstract:
    This thesis presents both an analysis and simulations of a passively controlled variable-speed generator system, which can be applied for renewable energy sources such as wind turbines. Parallel connected passive/external resistors and inductors are connected to the slip rings of a wound rotor induction machine to provide an acceptable speed...
    Resource Type:
    Masters Thesis
    Full Text:
    simulations of a passively controlled variable-speed generator system, which can be applied for renewable

  • Timing jitter and phase noise in electronic oscillators

    Creator:
    Zhang, Chengwei
    Abstract:
    In the first part of this dissertation, low frequency l/f or flicker noise in the frequency range of Hz to kHz has been identified and demonstrated to be described by temperature fluctuations in heat conduction in bipolar transistors operated at higher power densities. This noise phenomenon is not described by...
    Resource Type:
    Dissertation
    Full Text:
    , we have developed a large signal non- linear transient simulation technique to simulate phase noise

  • Eager data transfer mechanism for user-level network protocol

    Creator:
    Won, Chulho
    Abstract:
    This dissertation investigates the use of a hardware mechanism called Eager Data Transfer (EDT) for achieving the reduction of communication latency for user-level network protocol. To reach the goal, the dissertation addresses the following research issues. First, the development of a communication system performance evaluation tool called Linux/SimOS is presented....
    Resource Type:
    Dissertation
    Full Text:
    investigates the use of a hardware mechanism called Eager Data Transfer (EDT) for achieving the reduction of

  • Thai preservice middle school mathematics teachers' subject matter knowledge and knowledge of students' conceptions of division of rational numbers with respect to their classroom practices

    Creator:
    Singmuang, Charuwan
    Abstract:
    The study investigated the impact of Thai preservice middle school mathematics teachers' knowledge of subject matter and of students' conceptions of division of rational numbers with respect to their classroom practices in a teaching environment controlled by a required national curriculum. Four preservice teachers were selected with different knowledge of...
    Resource Type:
    Dissertation
    Full Text:
    classroom practices in a teaching environment controlled by a required national curriculum. Four preservice