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Filtering by: Committee Member Wallace, Alan Remove constraint Committee Member: Wallace, Alan Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Finite element based rotor design optimization for the brushless doubly-fed machine

    Creator:
    Salim, Mohamed Ali, 1968-
    Abstract:
    Brushless Doubly-Fed Machines have potential benefits in variable speed generation and adjustable speed drive applications by combining a robust machine structure with a reduced power converter rating. While recent work has demonstrated feasibility, steady-state performance has not been optimized. The nature of doubly-fed operation causes rotor currents of varying, relatively...
    Resource Type:
    Masters Thesis
    Full Text:
    privileged to have had him as my advisor. I would also like to thank Dr. Alan Wallace and Dr. G. C

  • Direct torque control for brushless doubly-fed machines

    Creator:
    Brassfield, William R.
    Abstract:
    The Brushless Doubly-Fed Machine (BDFM) has recently become an important research topic in the field of variable-speed AC drives. In recent studies, the BDFM has shown significant potential for improving the reliability and performance of AC drive systems, as well as reducing total system cost. While the BDFM offers several...
    Resource Type:
    Masters Thesis
    Full Text:
    my thesis and providing helpful suggestions. I wish to personally thank Professor Alan Wallace for

  • 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:
    , Dr. Molly Shor, Dr. Alan Wallace, and Dr. Jim Coakley. I would like to thank Evelyn Matheson and

  • Power quality simulator for commercial office buildings

    Creator:
    Atluri, Prabha Krishna
    Abstract:
    The distortions of input voltage and current waveforms generated by switch mode power supply (SMPS) operation are a major cause of concern in the power quality performance of commercial office buildings. These distortions are usually evaluated by performing a site survey of the building. In this thesis, a power quality...
    Resource Type:
    Masters Thesis
    Full Text:
    University. Sincere thanks to Professor Alan Wallace, Professor Gabor Ternes and Professor Landau H.Rubin

  • 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

  • The effects of career planning on self-concept and academic achievement of at-risk middle school students in an urban public school environment

    Creator:
    Casey, Michael Winfield
    Abstract:
    The purpose of this study was to determine the effects of a six-week career planning dropout prevention program on the self-concepts and academic achievement of at-risk middle school students in an inner-city public school environment. The research population consisted of 1,434 students (grades seven, eight and nine) attending an inner...
    Resource Type:
    Dissertation
    Full Text:
    of my Oregon State University Advisory Committee: Drs. Kenneth Ahrendt, Alan Wallace, Lee Cole

  • Investigation and mitigation of the adverse effects of PWM adjustable speed drives

    Creator:
    Zhang, Haoran
    Abstract:
    With the introduction of high speed semiconductor power devices and the increased application of adjustable speed drives (ASDs) for efficient speed control of ac motors, there has been a growing number of costly motor-drive related process failures. It has been found that the high dv/dt and high switching frequency have...
    Resource Type:
    Dissertation
    Full Text:
    the members of my graduate committee: Doctor Alan Wallace, Doctor David J. Allstot, Doctor Rene Spee

  • A DSP controlled resonant active filter for current harmonic mitigation in three-phase power systems

    Creator:
    Ünsal, Abdurrahman
    Abstract:
    Power quality has become an important concern to both electric utilities and end users due to the increased use of non-linear loads in modem power systems over the past decade. Nonlinear loads inject harmonics into the power system and thus may lead to poor power quality and lower power factor....
    Resource Type:
    Dissertation
    Full Text:
    also like to thank the other members of my committee, Dr. Alan K. Wallace, Dr. Gabor Temes, Dr. Ron

  • Novel power conditioning circuits for piezoelectric micro power generators

    Creator:
    Han, Jifeng
    Abstract:
    Advanced low power devices promote the development of micro power generators (MPGs) to replace the batteries to power them. Due to the trend in decreasing integrated circuit (IC) supply voltages, power supply designers are facing more and more serious challenges. The objective of this research is to design a power...
    Resource Type:
    Dissertation
    Full Text:
    , Dr. Karti Mayaram, Dr. Huaping Liu, and Dr. Alan K. Wallace for being my committee members and

  • A DSP controlled multi-level inverter providing DC-link voltage balancing, ride-through enhancement and common-mode voltage elimination

    Creator:
    Dai, Shaoan
    Abstract:
    With the development of high performance power electronic and semiconductor technologies, Adjustable Speed Drive (ASD) systems are increasingly applied in residential, commercial and industrial applications. Due to the advantages at higher power ratings, the three-level Neutral-Point-Clamped (NPC) Voltage Source Inverter (VSI) is being employed in industrial and traction applications, static...
    Resource Type:
    Dissertation
    Full Text:
    committee: Dr. Alan Wallace, Dr. Gabor C. Temes, Dr. Kartikeya Mayaram and Dr. Jon Herlocker for their