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  • Voltage analysis of PWM inverter fed induction motors

    Creator:
    Al-Ghubari, Fahad H.
    Abstract:
    Adjustable Speed Drive (ASD) systems are widely used in industry to effectively improve process efficiency and control. Typically, an ASD system consists of a motor with its speed controlled by a power electronics converter via varying the amplitude and frequency of the input voltage. However, several abnormal insulation failures of...
    Resource Type:
    Masters Thesis
    Full Text:
    Voltage analysis of PWM inverter fed induction motors AN

  • Rapid bidirectional power flow of supercapacitor bank energy storage through grid-tied inverters for improved renewables integration

    Creator:
    Bostrom, Arne
    Abstract:
    The variable output of renewables such as wind and solar causes fluctuations of power flow that can adversely affect power system operation, especially at high levels of penetration. The coordination of multiple energy storage solutions can mitigate integration challenges by providing a buffer from variable renewables. This thesis presents the...
    Resource Type:
    Masters Thesis
    Full Text:
    Testing. 3.2 One-Cycle Control Grid-Tied Inverter In order to enable extremely fast reversal of

  • 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:
    inverter provides a very efficient way of manipulating the electric power to control ac motors, this

  • 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:
    Controlled Multi-Level Inverter Providing DC-Link Voltage Balancing, Ride-Through Enhancement and Common

  • Evaluation of partial discharge in inverter driven medium voltage propulsion coils

    Creator:
    Ramme, André
    Abstract:
    Advancements in power electronics to higher power levels and faster switching times allow new machine and systems designs, but also create higher stresses on electric machinery insulation. High performance, pulse-width modulated (PWM) inverters are now available for medium voltage drive systems, and are being considered by the U.S. Navy as...
    Resource Type:
    Dissertation
    Full Text:
    two non-inverter duty coils. Literature Review Insulation issues in electric machinery have existed

  • OP-AMP free SC biquad LPF and delta-sigma ADC

    Creator:
    Yoo, Kiseok
    Abstract:
    The objective of this work is to explore the feasibility of replacing conventional op-amps with inverters in switched-capacitor (SC) circuits. In order to verify the idea, a low-pass filter (LPF) and a second-order delta-sigma (∆Σ) analog-todigital converter (ADC) are designed in the 0.5-m CMOS technology. The low-pass filter structure is...
    Resource Type:
    Masters Thesis
    Full Text:
    ....................................................................................... 6 2.3. Biquad LPF Based on Inverter

  • Low Frequency Oscillation Reduction Algorithm for Six-step Operation of Three-Phase Inverters

    Creator:
    Ke, Ziwei
    Abstract:
    A power inverter, or inverter, is an electronic device or circuitry that converts direct currents (DC) to alternating currents (AC) in the power electronics family. A three-phase inverter converts DC current to three-phase AC current. Inverters, especially three-phase inverters, have been widely used in many fields including renewable energy applications...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: Julia Zhang A power inverter, or inverter, is an electronic device or circuitry that

  • A motor-generator and supercapacitor based system for microgrid frequency stabilization

    Creator:
    Crispo, Richard F.
    Abstract:
    This research introduces an energy storage system to deliver microgrid frequency response. A doubly-fed induction generator (DFIG) and a squirrel cage induction machine (SCIM) are coupled together as a motor/generator set to deliver an immediate inertial response to a change of frequency, and an inverter and supercapacitors deliver short term...
    Resource Type:
    Masters Thesis
    Full Text:
    frequency, and an inverter and supercapacitors deliver short term power. The hardware results show the

  • Development of flashover detector and analyzer for transmission structures

    Creator:
    Giffin, Bertrand Lee
    Resource Type:
    Masters Thesis
    Full Text:
    Equations from ELECTRIC POWER TRANSMISSION AND DISTRIBUTION" By L. F Woodruff. -T----------------t

  • The Induction Motor and Performance Test

    Creator:
    Buchanan, Elmer Clarence and Smith, Arthur Byron
    Abstract:
    The following discussion is confined mostly to that type of machine in which the squirrel care revolving secondary it used. In its most primitive form it con - listed simply of a disk- aramature as described by Baily in 1870 and due to Tesla (1888), of the fact that two,...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    actual test and used in com- putations. The machine used in this test was of the General Electric