SUNScholar
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Faculty of Engineering
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Department of Electrical and Electronic Engineering
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Doctoral Degrees (Electrical and Electronic Engineering)
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Browsing by Subject

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Now showing items 1-12 of 12

Analysis and evaluation of brush-DC equivalent controlled multiphase cage induction machine drive

Gule, Nkosinathi (Stellenbosch : University of Stellenbosch, 2011-03)

ENGLISH ABSTRACT: The multiphase induction machine drive has been under investigation for the last half century. Although it offers several attractive advantages over the conventional three-phase induction machine drive, ...
Analysis of a radial flux-air-cored permanent magnet machine with a double-sided rotor and non overlapping windings

Randewijk, Peter-Jan (Stellenbosch : Stellenbosch University, 2012-03)

ENGLISH ABSTRACT: In this dissertation a new type of electrical machine, a Radial Flux Air-Cored Permanent Magnet machine with a Double-sided Rotor and utilising concentrated, non-overlapping windings, is proposed. The ...
Analysis of interior permanent magnet motors with non-overlapping windings

Germishuizen, Johannes Jacobus (Stellenbosch : University of Stellenbosch, 2009-03)
Design, comparison and experimental evaluation of non-overlap winding radial flux permanent magnet hub drives for electric vehicles

Rix, Arnold Johan (Stellenbosch : University of Stellenbosch, 2011-03)

ENGLISH ABSTRACT: The focus of this thesis is on the optimal design, control and evaluation of 3-phase permanent magnet radial flux synchronous machines with non-overlapping, concentrated-coil, double layer stator windings ...
Development of a novel air-cored permanent magnet linear generator for direct drive ocean wave energy converters

Vermaak, Rieghard (Stellenbosch : Stellenbosch University, 2013-03)

ENGLISH ABSTRACT: In hierdie tesis word ’n nuwe lug kern permanent magnet (PM) lineêre generator (LG) vir toepassing tot direk aangedrewe (DA) oseaan golf energie omsetters (GEO) ontwikkel. Die nuwe LG word ontwikkel vanaf ...
Low Earth orbit satellite constellation control using atmospheric drag

Du Toit, Daniel N.J. (Stellenbosch : University of Stellenbosch, 1997-03)

This dissertation considers the feasibility of using atmospheric drag to control constellations of micro-satellites in low Earth orbits. The constellation control requirements include an acquisition phase and a maintenance ...
Methods to quantify and reduce rotor losses in a solid rotor yoke permanent magnet machine

Wills, Dominic (Stellenbosch : University of Stellenbosch, 2010-03)

ENGLISH ABSTRACT: Certain types of electric machines are particularly susceptible to the proliferation of eddy currents flowing within the solid conducting regions in the rotor. Single-layer, non-overlapping windings ...
Natural balancing mechanisms in converters

Van der Merwe, Johannes Wilhelm (Wim) (Stellenbosch : University of Stellenbosch, 2011-03)

AFRIKAANSE OPSOMMING: Hierdie proefskrif handel oor die natuurlike balanserings meganismes van veelvlakkige en modulêre omsetters wat fase-skuif dragolf puls wydte modulasie gebruik. Die meganismes kan in twee hoof groepe ...
Natural balancing of multicell converters

Wilkinson, Richardt Howard (Stellenbosch : University of Stellenbosch, 2004-04)

ENGLISH ABSTRACT: Multilevel converters were developed as a result of a growing need for higher power converters. This dissertation addresses a specific multilevel topology called the multicell topology. A problem associated ...
Natural balancing of three-phase 2-cell and 3-cell multicell converters

Salagae, Isaac Mahijoko (Stellenbosch : University of Stellenbosch, 2010-03)

ENGLISH ABSTRACT: The multicell inverter, being a widely used multilevel converter, has received much attention in recent years due to problems associated with cell capacitor voltage. In this dissertation we study the ...
Position sensorless and optimal torque control of reluctance and permanent magnet synchronous machines

De Kock, Hugo Werner (Stellenbosch : University of Stellenbosch, 2009-03)

Keywords: position sensorless control, torque control, synchronous machines The work in this thesis deals with energy e cient torque control and rotor position estimation in the full speed range, for a family of synchronous ...
Torque Performance of Optimally Designed Multi-Phase Reluctance DC Machines

Rakgati, Edward Tshitshiri (Stellenbosch : University of Stellenbosch, 2006-12)

The focus of this thesis is on the critical evaluation of the torque performance of the optimum designed reluctance DC machine (RDCM). The thesis focuses on multi-phase RDCM drives with normal laminated salient pole rotors ...