Browsing by Supervisor "Kularatna, Nihal"
Now showing items 1-20 of 21
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Analysis on Supercapacitor Assisted Low Dropout (SCALDO) Regulators
(University of Waikato, 2014)State-of-the-art electronic systems employ three fundamental techniques for DC-DC converters: (a) switch-mode power supplies (SMPS); (b) linear power supplies; (c) switched capacitor (charge pump) converters. In practical ... -
Design and implementation of an AC voltage regulator based on series power semiconductor array
(University of Waikato, 2014)This thesis describes the use of an array of power semiconductors (series transistor array) and a buck-boost transformer in the design and implementation of a single phase AC voltage regulator. The power semiconductor array ... -
Design of SCALDO based high-current DC power supply
(The University of Waikato, 2021)Supercapacitor assisted (SCA) techniques are primarily based on supercapacitors having in the order of one million times more capacitance, together with one to two orders of magnitude smaller equivalent series resistance ... -
Development of a customised, self powered data logger for monitoring farm fence energizers
(University of Waikato, 2008)For gathering information on the performance of energizer products in the field, Gallagher Group Limited had a well out-dated data-logger which periodically monitored the voltage of the fence and transmitted the data back ... -
Development of a Power Factor Corrected High Current Supercapacitor Charger for a Surge Resistant UPS
(University of Waikato, 2012)The Uninterrupted Power Supplies (UPSs) provide short term power back up to electrical loads when the mains power fail. Usually UPSs employ battery packs as the energy storage device. However the limitations of battery ... -
Development of a Supercapacitor based Surge Resistant Uninterruptible Power Supply
(University of Waikato, 2011)Uninterruptible Power Supplies (UPSs) provide short-term power back-up to sensitive electronic and electrical equipments, where an unexpected power loss could lead to undesirable outcomes. They usually bridge the connected ... -
Efficiency enhancements to a linear AC voltage regulator: Multi-transformer and multi-winding designs
(The University of Waikato, 2020)Utility companies are expected to distribute electricity that conforms with international or national standards related to RMS voltage fluctuations. However, RMS voltage variations sometimes exceed acceptable limits and ... -
Efficiency Improvement of LDO Output Based Linear Regulator With Supercapacitor Energy Recovery – A versatile new technique with an example of a 5V to 1.5V version
(University of Waikato, 2011)Supercapacitors are used in various industrial applications and the supercapacitors technology is gradually progressing into a mature state. Common applications of supercapacitors are in electric vehicles, hybrid electric ... -
Field data collection for implementation of Supercapacitor Assisted LED Lighting (SCALED)
(The University of Waikato, 2018)With the increasing impact of global warming, climate change is becoming the biggest threat for all life on our planet. The conventional way of generating electricity from the burning of fossil fuels releases significant ... -
High power linear AC Electronic Load for testing UPS Systems
(The University of Waikato, 2007)Concept of a series bipolar transistor array for AC power control is already developed. However non-linearity issues, high power capability with load sharing at high voltages and digital control with better transient ... -
Investigation of surge propagation in transient voltage surge suppressors and experimental verification
(University of Waikato, 2014)An on-going question in the field of surge protection study is how to predict incipient failure of power electronics in the event of a short time, high voltage, and high energy transient surge propagation. The work presented ... -
Investigations on the surge withstand capability of SCALED System
(The University of Waikato, 2021)Simple resistor-capacitor (RC) circuit theory is extended in developing Supercapacitor Assisted (SCA) technique by placing supercapacitor (SC) in series with the useful load. Part of wasted energy in a RC loop is utilised ... -
NiMH battery forensics: Instrumentation, modelling and prognostics for identifying failure
(University of Waikato, 2016)Battery forensics is a growing research field that is becoming increasingly important with the introduction of hybrid-electric and electric vehicles. The need to correctly diagnose battery condition and predict signs of ... -
Permeance based modelling, design and optimization of supercapacitor assisted surge absorber (SCASA)
(The University of Waikato, 2021)Supercapacitor assisted (SCA) techniques are a unique set of circuit topologies designed to fulfil power conversion and protection tasks by circumventing the energy losses normally associated with RC based circuits. With ... -
Supecapacitor-assisted Temperature Modification Apparatus (SCATMA) and Fast Supercapacitor Charger
(University of Waikato, 2016)This thesis presents the design and development of the supercapacitor-assisted "instant" water heating system as well as a new power converter topology to fast charge a supercapacitor bank. Delayed delivery of hot water ... -
Supercapacitor assisted bicycle for the future of efficient mobility
(The University of Waikato, 2021)With the world becoming more aware about climate change and being climate conscious, the move away from conventional gasoline powered mobility is accelerated. The public, looking for alternate methods of transportation, ... -
Supercapacitor Assisted Inverter for the purposes of Input Ripple Control
(University of Waikato, 2016)This thesis describes the use of a series/parallel supercapacitor to actively control the input ripple of a DC-AC power inverter through the use of a new inverter topology. The topology is made up of two 'sub-inverters' ... -
Supercapacitor assisted LED (SCALED) converter technique for solar powered DC-microgrids
(The University of Waikato, 2020)Designing electronic products and systems with high energy efficiency is a major challenge for electronic power circuit designers. Almost all residential and industrial buildings are presently AC powered. However, they ... -
Supercapacitor assisted power converter for DC microgrid applications with self-contained DC-UPS capability
(University of Waikato, 2017)Nowadays, due to the advantages inherent in using renewable energy, renewable power generation is becoming established worldwide. Direct current (DC) microgrid systems, which have been proposed as alternatives for traditional ... -
Supercapacitor technologies for renewable energy application
(The University of Waikato, 2019)Supercapacitors are increasingly gaining popularity since the advent of “world campaign” for clean energy generation. They are characteristically high power-dense energy storage devices with very low ESR. They are known ...
