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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.
71

Power generation using an induction machine with synchronous capacitor excitation

David, Richard A. January 1978 (has links)
No description available.
72

Non-Invasive Technologies for Condition Monitoring of Synchronous Motors

Sjölander, John January 2014 (has links)
The modern industry today is highly dependent on electric motors of differenttypes and sizes. Synchronous motors are used in applications where a fixedspeed is desired. These machines are often found in high power applicationswhere they are preferred over induction motors due to their higher efficiency.Synchronous motors represent large investments and typically drive processeswhere downtime results in significant capital losses. Thus, detecting faults atan early stage can help avoid catastrophic failures and be useful in thescheduling of maintenance. In order to detect faulty conditions before theyterminate in a failure, machine operators must perform some kind ofmonitoring on the machines. Typically, the more critical the machine is for aprocess, the more effort is put on monitoring it. Before building a monitoringsystem for a machine, one must first decide what parameters that should bemonitored. The obvious desire is to find a parameter that is easy and cheap tomeasure and at the same time can give detailed information about the workingstate of the machine.The aim of this thesis is to evaluate whether the exciter stator current is anadequate parameter to use within a monitoring system for synchronous motors.The evaluation has been made through simulations of two different setups;One using a synchronous motor in the 20 MW range fed by a synchronousmachine type exciter. And the other using the same motor but instead fed byan induction machine type exciter. It has been found that the exciter statorcurrent can be used for detection of faults associated to the rectifier and statorshort circuit of the main machine stator winding. It has not been possible todetect turn-to-turn faults in the main machine rotor.The work has been performed at ABB Corporate Research in Västerås fromJune until December 2013.
73

A dynamic analog for synchronous machines

Chenoweth, Robert Dean 08 1900 (has links)
No description available.
74

A traffic generation algorithm for SDH digital cross-connects

Johnston, Robert Thomas 08 1900 (has links)
No description available.
75

Power synchro dynamics.

Burridge, Robert Eric. January 1969 (has links)
No description available.
76

Sensorless control of AC machines for integrated starter generator application

Hu, Jiangang, January 2007 (has links)
Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 133-137).
77

Application mapping on multiprocessor hardware platforms using genetic algorithms /

Su, Dongzhe. January 2009 (has links)
Includes bibliographical references (p. 32-35).
78

Magnitudes and phase angles of harmonic voltages for synchronous D.C. transmission

Phandhu-Fung, Amorn, January 1969 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1969. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
79

Methods of controlling the magnetic axis of a synchronous machine to improve system damping

Towle, James Nicolai, January 1967 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
80

Simulation and modeling of substrate noise generation from synchronous and asynchronous digital logic circuits /

Hanken, Christopher. January 1900 (has links)
Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 57-59). Also available on the World Wide Web.

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