Browsing by Author "Kularatna, Nihal"

• A supercapacitor based enhancement technique for stand-alone surge protection circuits 

  Fernando, Jayathu; Kularatna, Nihal (IEEE, 2013)

  With the International Technology Roadmap for Semiconductors predicting below-25nm feature-size VLSIs, powered by DC power supplies of less than 1V, protection against transients has become mandatory for modern electronic ...

  

• Analysis and design aspects of a series power semiconductor array with digital waveform control capability for single phase ac voltage regulators and other applications 

  Jindasa, Chandani; Kularatna, Nihal (Scientific Research Publishing, 2011)

  A series connected power semiconductor array, with digital control capability could be used for developing single phase AC regulators or other applications such as AC electronic loads. This technique together with an ...

• Design approaches to supercapacitor based surge resistant UPS techniques 

  Kularatna, Nihal; Tilakaratne, Lasantha; Kumaran, Parthasaradhy Kozhiparambil (Institute of Electrical and Electronics Engineers., 2011)

  Time constants of supercapacitors are in the range of 100mS to tens of seconds compared to the time durations of power line transients, which are usually within a few hundred microseconds. Therefore supercapacitors should ...

• Design enhancements of the smart sediment particle for riverbed transport monitoring 

  Kularatna-Abeywardana, Dulsha; Hu, Aiguo Patrick; Kularatna, Nihal (2009)

  This paper discusses new enhancements that are being made to the existing ‘Smart Sediment Particle’. The smart sediment particle has been designed and implemented to track its own 3-dimensional trajectory when placed in a ...

  

• Developing a monitoring system for Toyota Prius battery-packs for longer term performance issues 

  Leijen, Peter; Kularatna, Nihal (IEEE, 2013)

  The Toyota Prius battery pack consists of 38 individual battery blades, each blade contains 6 NiMH cells in series. This means that each pack contains 228 NiMH cells. Given this number of individually manufactured cells ...

  

• Supercapacitor assisted bicycle for the future of efficient mobility 

  Sirimanne, Don Charles Uvindra (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, ...

  

• Permeance based modelling, design and optimization of supercapacitor assisted surge absorber (SCASA) 

  Silva Thotabaddadurage, Sadeeshvara Udayanga (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 ...

  

• Design of SCALDO based high-current DC power supply 

  Ariyarathna, Thilanga (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 ...

  

• Investigations on the surge withstand capability of SCALED System 

  Udas, Pranav (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 ...

  

• Efficiency enhancements to a linear AC voltage regulator: Multi-transformer and multi-winding designs 

  Wijesooriya, Priyanwada Nimesha (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 ...

  

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