Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 314 for “"TK Electrical engineering. Electronics Nuclear engineering"”.
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Design, implementation and control of microwave plasma gasification system for syngas production
This thesis provides a solution for sustainable energy production. It applies the newest technologies of microwave plasma on a traditional method known as gasification. The simulation of this system has been achieved through a high frequency structure simulator to decide the best design of the …
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Independent power flow control of multiple energy sources using a single electric machine
… utilise the well-established three-phase power electronics technologies. The interest towards electrification of the transportation systems makes having multiple energy source a viable solution in the near future. Independent power flow control will enable the integration of hybrid energy …
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Hierarchical Clustering Techniques for Energy-efficient Algorithms in WSNs
In Wireless Sensor Networks (WSNs) with large number of micro-sensor nodes, successfully receiving all the useful data with unnecessary loss of energy is a major challenge. WSNs are extremely important for many applications in civil and military domains. Despite their use in many successful …
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Reliability Characterisation of III-Nitrides Based Devices for Technology Development
… gate. Through electro-thermal simulations, the electrical stress on Ohmic contacts was shown to reduce the strain; leading to the inverse/converse piezoelectric effect. A new parametric technique was developed to decouple the mechanisms constituting device degradation in AlGaN/GaN HEMTs under …
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Development of electrical characterization techniques for lifetime prediction and understanding defects in InGaAs-based III-V transistors
… this period time, engineers focus on the higher electrical field and accelerate the degradation to make the highly performance of advanced CMOS devices with better and smaller size than before. At this moment, there are plenty of issues are found which can affect the performances ofthe device. …
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Bias Temperature Instability Modelling and Lifetime Prediction on Nano-scale MOSFETs
Bias Temperature Instability (BTI) is one of the most important reliability concerns for Metal Oxide Semiconductor Field Effect Transistors (MOSFET), the basic unit in integrated circuits. As the development MOSFET manufacturing technology, circuit designers need to consider device reliability …
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Space Vector Pwm Techniques for Six_Phase Three-Level Inverter-Fed Drives
In recent years, research in the area of multiphase drives has increased significantly. Having higher number of machine phases allows the current to be shared between the phases, thus reducing the current rating of power semiconductors used in the power converter. Additionally, if a multilevel …
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PERMANENT MAGNET MULTIPHASE MACHINE MODELING AND CONTROL FOR MV WIND ENERGY APPLICATIONS
Due to the rapid development of the power electronics in the second half of the twentieth century, a significant research effort has been put into the modelling of electrical machines to provide mathematical models for control purposes. As the power electronics isolate the machine from the grid, …
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Novel DWT-DAPSK based transceivers for DVB-T transmission and next generation mobile networks
… most exciting research topics in the electronic engineering field due to the explosive demands for high-speed wireless services, such as cellular video conferencing. The second generation Terrestrial Digital Video Broadcasting (DVB- T2) has been demonstrated to provide digital communication …
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PWM strategies for multilevel multiphase AC drives
Pulse width modulation (PWM) strategies for multilevel multiphase ac drives have been analysed in this thesis. The large amount of published work in the area of multiphase drives recognises their advantages compared to the standard three-phase solutions. Some of them arc improved power sharing …
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Characterisation of Novel Resistive Switching Memory Devices
Resistive random access memory (RRAM) is widely considered as a disruptive technology that will revolutionize not only non-volatile data storage, but also potentially digital logic and neuromorphic computing. The resistive switching mechanism is generally conceived as the rupture/restoration of …
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Characterization of negative bias temperature instability and lifetime prediction for pMOSFETs
In order to achieve high speed and packing density, the size of the transistor has shrunk aggressively. The gate dielectric, as the most critical component in the transistor, is undergoing rapid and substantial changes with the adoption of ultra-thin plasma nitrided oxide and more recently high-k …
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Development of characterization techniques for negative bias temperature instabilities
… in the last 50 years or so. This leads to higher electrical field and operation temperature and, in turn, accelerates the degradation. One of the most serious reliability issues for the current CMOS technology is the negative bias temperature instability (NETI). This project will focus on …
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Development of pulse-width-modulation techniques for multi-phase and multi-leg voltage source inverters
A huge body of work has been published in recent times in the area of multi-phase machines and drives. Many aspects of these drives have been analysed, such as reduction of torque pulsations, increased reliability and fault tolerance, improved power sharing capabilities and possibilities for …
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Characterization of high-k layers as the gate dielectric for MOSFETs
As the gate oxide thickness of the Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) is continuously scaled down with lateral device dimensions, the gate leakage current during operation increases exponentially. This increase in leakage current raises concerns regarding power consumption …
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Development of Adaptive and Factorized Neural Models for MPC of Industrial Systems
Many industrial processes have non-linear and time-varying dynamics, for which the control and optimization require further investigations. Adaptive modelling techniques using radial basis function (RBF) networks often provide competitive modelling performances but encounter slow recovery speed …
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Fluid flow measurement using electrical and optical fibre strain gauges.
… are generated irrespective of each other. Electrical resistance strain gauges are used as the force measuring device for the first version of the flow meter. These strain gauges are bonded to the four longitudinal surfaces of a square-sectioned, elastic, rubber cantilever having a drag …
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