Thèses (M.Sc.A.)--Université de Sherbrooke (Canada), 1997. / Titre de l'écran-titre (visionné le 20 juin 2006). Publié aussi en version papier.

Thesis (Ph. D.)--Ohio State University, 1972. / Includes bibliographical references (leaves 90-91). Available online via OhioLINK's ETD Center

Thèses (M.Sc.A.)--Université de Sherbrooke (Canada), 1999. / Titre de l'écran-titre (visionné le 24 août 2006). Publié aussi en version papier.

No description available.

Fault diagnosis is gaining more attention for electric machines running critical loads, whose sudden breakdown can result in unpredictable revenue losses. Consequently the motor drive systems with fault diagnostic and prediction features are of great concern and are becoming almost indispensable. Among all kinds of common faults, quite a few have relationship with unequal air-gap. So far, work on detection of eccentricity related faults in synchronous and induction machines have been well documented. However, few are reported on faults resulting fiom axial non-uniform air-gap. This thesis investigates the performance of a three-phase induction machine with non-uniform static eccentricity along axial direction or inclined static eccentricity. A variant of Modified Winding Function Approach (MWFA) is applied to study this fault. The relationship between the number of rotor bars, poles and the existence of fault related current harmonics is discussed. It is shown that inclined eccentricity also demonstrates similar characteristics as circumferential non-uniform air-gap (Static Eccentricity or Dynamic Eccentricity). The case that demands special attention is inclined eccentricity symmetric to the mid-point of machine shaft, which cannot be detected directly from current spectrum. These results will be useful reference to the designers of online tools for machine condition monitoring. Finite Element results to verify the inductance values used in simulation are also presented. The analysis is supplemented by the stator current spectra obtained fkom simulated results for different load and fault conditions. Finally a four-pole, 45 rotor bar, 2 kW induction motor is used to validate the theoretical and simulation results experimentally.

xvii, 307 leaves : ill. ; 26 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.1969) from the Dept. of Electrical Engineering, University of Adelaide

Thesis (Ph. D.)--Oregon State University, 1967. / Typescript (photocopy). Includes bibliographical references (p. 46-47). Also available on the World Wide Web.

Thèse de doctorat : Mécanique et énergétique : INPL : 2008. / Titre provenant de l'écran-titre.

Thesis (Ph. D.)--University of Queensland, 2002. / Includes bibliographical references.

No description available.