Browsing Masters Degrees (Electrical and Electronic Engineering) by Title

Now showing items 258-277 of 629

    • The development of equipment for the fabrication of thin film superconductor and nano structures 

      Buttner, Ulrich (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: The nano-age is more about the mesoscopic phenomena, than those occurring at molecular and atomic level, which have been studied by chemists and physicists for more than a hundred years. Nanotechnology ...

    • Development of nonlinear CAD Models for the design of linear LDMOS power amplifiers 

      Du Plessis, Francois Daniel (Stellenbosch : University of Stellenbosch, 2006-03)
      Nonlinear transistor modeling is becoming increasingly popular due to the demand for high linearity and high efficiency microwave amplifiers. The available models often fail to accurately predict the higher order harmonics ...

    • The development of Sun and Nadir sensors for a solar sail CubeSat 

      Loubser, Hanco Evert (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: This thesis describes the development of attitude sensors required for the Attitude Determination and Control System (ADCS) for a Cubesat. The aim is to find the most suitable sensors for use on a small ...

    • Digital control of line-interactive UPS 

      Van Papendorp, J. F. (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: The digital control of UPS systems has been difficult in the past due to a lack of DSP technology. It was for this reason not possible to establishing the necessary control to regulate the voltages and ...

    • Digital pulse width modulation for Class-D audio amplifiers 

      Jacobs, Deon (Stellenbosch : University of Stellenbosch, 2006-03)
      Digital audio data storage mediums have long been used within the consumer market. Today, because of the advancement of processor clock speeds and increased MOSFET switching capabilities, digital audio data formats can ...

    • Digitally controlled class-D audio amplifier 

      Van der Merwe, Carel (2017-03)
      ENGLISH ABSTRACT: Class-D audio ampli ers have become increasingly popular due to the fact that they use transistors as switches to amplify audio and do not operate them in their linear region, as is the case with other ...

    • Direct grid connection and low voltage ride-through for a slip synchronous-permanent magnet wind turbine generator 

      Hoffmann, Ulwin (Stellenbosch : Stellenbosch University, 2012-03)
      ENGLISH ABSTRACT: The slip synchronous-permanent magnet generator (SS-PMG) is a direct-driven, direct-to-grid generator for wind turbine applications. This investigation focuses on achieving automated grid connection ...

    • Distributed control system network for an electrostatic roll separator 

      Theron, Pieter (Stellenbosch : University of Stellenbosch, 2006-03)
      The distributed control system network involves analog data acquisition nodes interconnected through CAN and USB protocol interfaces to form a network. The network is designed to be generically applicable to various ...

    • Distributed real-time processing using GNU/Linux/libré software and COTS hardware 

      Van Schalkwyk, Dirko (Stellenbosch : Stellenbosch University, 2004-03)
      ENGLISH ABSTRACT: This dissertation's research aims at studying the viability of using both low cost consumer Commodity Off The Self (COTS) PCs and libn~software in implementing a distributed real-time system modeled ...

    • A domestic electric water heater application for Smart Grid. 

      Cloete, Andrew Hector (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: Domestic electric water heaters (EWHs) are some of the largest consumers of electricity in the residential sector. EWHs are also responsible for high demand peaks, which add additional strain to the ...

    • A dual circularly polarized single element microstrip patch antenna 

      Maki, Pamela Ruth (Stellenbosch : Stellenbosch University, 2004-03)
      ENGLISH ABSTRACT: This thesis discusses the design of a dual circularly polarized single element antenna with special emphasis on achieving a wide bandwidth and high polarization isolation. The aim of the study is ...

    • Dynamic control of the permanent magnet assisted reluctance synchronous machine with constant current angle 

      De Kock, Hugo Werner (Stellenbosch : University of Stellenbosch, 2006-03)
      This thesis is about the dynamic control of a permanent magnet assisted reluctance synchronous machine (PMA RSM). The PMA RSM in this thesis is a 110 kW traction machine and is ideal for the use in electrical rail vehicles. ...

    • Dynamic digital control schemes for three-phase UPS inverters 

      Uys, Jacobus Johannes (Stellenbosch : Stellenbosch University, 2002-12)
      ENGLISH ABSTRACT: This thesis presents the design and implementation of a voltage controller for an Uninterruptible Power Supply (UPS) Inverter. The inverter is capable of producing a nearly sinusoidal output voltage ...

    • The dynamic modelling and control system of a tethered aerostat for remote sensing applications 

      Fourie, Daniel Andries (Stellenbosch : University of Stellenbosch, 2009-12)
      ENGLISH ABSTRACT: Aerostats and Stratolites could play a major role in expanding current satellite and other technologies in the near future. A study was made on the development of aerostat platforms and the current state ...

    • Dynamic reconfigurable platform for swarm robotics 

      Heath, Gerhardus (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: Swarm intelligence research was inspired by biological systems in nature. Working ants and bees has captivated researchers for centuries, with the ant playing a major role in shaping the future of robotic ...

    • Dynamics and Energy Management of Electric Vehicles 

      Van Schalkwyk, Daniel Jacobus (Stellenbosch : University of Stellenbosch, 2007-12)
      The work presented in this thesis forms part of the participation of the University of Stellenbosch in an electric vehicle project. The thesis deals with three aspects of the dynamics and energy management of the electric ...

    • An economical do - it - yourself ground station for school pupils 

      Nel, Francois (Stellenbosch : Stellenbosch University, 2001-12)
      ENGLISH ABSTRACT: The aim of the thesis is the design of an economical do - it - yourself ground station for school pupils to communicate with SUNSAT 1. The ground station should also be more economical than a hand - ...

    • An eCos based flight software for a nanosatellite 

      Mthembu, Sifiso Selby (Stellenbosch : University of Stellenbosch, 2009-03)
      The nanosatellite is build-up of subsystems and payloads (defined as satellite nodes) connected together into the OBC using CAN bus as the main communication protocol. The flight software application is required to run ...

    • Effect of altitude on audible noise generated by AC conductor corona 

      Roets, Hendrik Adriaan (Stellenbosch : Stellenbosch University, 2012-12)
      ENGLISH ABSTRACT: Power utilities are expected to keep the cost of electricity as low as possible. They are also expected to be environmentally friendly and, amongst other things, not to produce unacceptable audible ...

    • The effect of mutual coupling on the noise performance of large antenna arrays 

      Van der Merwe, Jacki (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: Worldwide, more large antenna arrays are being deployed in areas of science previously dominated by other antenna geometries. Applications for large arrays include Radar, Satellite Communications and ...