Induction motors with modulated terminal voltage

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dc.contributor.advisorEnslin, NC de Ven_ZA
dc.contributor.authorSchauder, Colin Daviden_ZA
dc.date.accessioned2016-03-21T19:03:17Z
dc.date.available2016-03-21T19:03:17Z
dc.date.issued1978en_ZA
dc.descriptionBibliography: pages 292-294.en_ZA
dc.description.abstractFollowing the development of high speed solid state switches for the forced commutation of current in AC power circuits it has become feasible to apply forced commutation techniques to the frequency and voltage control of induction motors as variable speed drives. The availability of these methods raises questions regarding their effect on the performance of the motor and the generation of harmonic currents in the electrical supply. After the initial use of numerical simulation in the study of these systems it became apparent that this approach was not suitable for the evaluation of steady state performance factors. This thesis sets out to establish an analysis of the induction motor under these conditions which leads to the algebraic formulation of the performance of the system in the steady state. This approach can be used in any situation where the electrical supply to an induction motor is modulated by switching techniques. The analysis has been applied to chopper modulation of the supply voltage and also to a phase-stepping frequency convertor which incorporates chopper modulation. Experimental results are included to illustrate the validity of the analytical method.en_ZA
dc.identifier.apacitationSchauder, C. D. (1978). <i>Induction motors with modulated terminal voltage</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/18018en_ZA
dc.identifier.chicagocitationSchauder, Colin David. <i>"Induction motors with modulated terminal voltage."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1978. http://hdl.handle.net/11427/18018en_ZA
dc.identifier.citationSchauder, C. 1978. Induction motors with modulated terminal voltage. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Schauder, Colin David AB - Following the development of high speed solid state switches for the forced commutation of current in AC power circuits it has become feasible to apply forced commutation techniques to the frequency and voltage control of induction motors as variable speed drives. The availability of these methods raises questions regarding their effect on the performance of the motor and the generation of harmonic currents in the electrical supply. After the initial use of numerical simulation in the study of these systems it became apparent that this approach was not suitable for the evaluation of steady state performance factors. This thesis sets out to establish an analysis of the induction motor under these conditions which leads to the algebraic formulation of the performance of the system in the steady state. This approach can be used in any situation where the electrical supply to an induction motor is modulated by switching techniques. The analysis has been applied to chopper modulation of the supply voltage and also to a phase-stepping frequency convertor which incorporates chopper modulation. Experimental results are included to illustrate the validity of the analytical method. DA - 1978 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1978 T1 - Induction motors with modulated terminal voltage TI - Induction motors with modulated terminal voltage UR - http://hdl.handle.net/11427/18018 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18018
dc.identifier.vancouvercitationSchauder CD. Induction motors with modulated terminal voltage. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1978 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18018en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherElectrical Engineeringen_ZA
dc.subject.otherElectronic and Electrotechnical Engineeringen_ZA
dc.titleInduction motors with modulated terminal voltageen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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