Search results for: DAC

• Modeling DAC Application Execution Time

  Publication

  • J. Kuchta

  - Year 2016

  An application written in the Divide And Conquer paradigm is more difficult to model than SPMD application because of complex algorithm, causing use of many coefficients in a computational complexity function. Processors are divided into various layers, each layer contains different number of processors. Data packets processed in different layers and transferred between layers have different length. Moreover first layer processors use...

• AC-DC-DC Converter for Small Power Energy Storage Systems

  Publication

  • S. Piasecki
  • S. Bachman
  • J. Zaleski
  • M. Jasinski
  • M. Turzyński

  - ENERGIES - Year 2023

  The energy transformation driven by the development of renewable energy sources has become a reality for all power grid users. Prosumer energy, primarily utilizing photovoltaic installations, is one of the fastest-growing market segments. The advancement of technology, a decrease in electrochemical energy storage prices, and changes in the legal framework governing energy billing for grid-fed power have led to a growing interest...

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• Reliability Modeling for SPMD and DAC Applications in MERPSYS

  Publication

  • J. Kuchta

  - Year 2016

  In this chapter we shall see a method for modeling of reliability of application execution in the MERPSYS system, and the results of reliability simulation of the same SPMD and DAC application which we have previously presented in this book. Unlike energy usage modeling and modeling of execution efficiency we could not compare the reliability model and simulation results to real experiment just because the experiment would last too...

• Energy Consumption Modeling in SPMD and DAC Applications

  Publication

  • J. Kuchta

  - Year 2016

  In this chapter, we show a study of energy consumption during execution of SPMD and DAC application – the same applications which time of execution we modeled in the previous two chapters. We measured an average power usage at a single node of the GALERA+ cluster during application execution and then we modeled the total energy consumption by the application. Next we simulated the applications using MERPSYS and we compared the...

• Dual Active Bridge (DAB) DC-DC converter for multilevel propulsion converters for electrical multiple units (EMU)

  Publication

  • M. Adamowicz
  • Z. Krzemiński
  • P. Stec

  - Year 2018

  Semiconductor power devices made from silicon carbide (SiC) reached a level of technology enabling their widespread use in power converters. Two different approaches to implementation of modern traction converters in electric multiple units (EMU) have been presented in recent years: (i) 3.3-kV SiC MOSFET-based three-level PWM inverter with regenerative braking and (ii) 6.5-kV IGBT-based four-quadrant power electronic traction transformer...

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• Analysis of AC/DC/DC Converter Modules for Direct Current Fast-Charging Applications

  Publication

  • S. Piasecki
  • J. Zaleski
  • M. Jasinski
  • S. Bachman
  • M. Turzyński

  - ENERGIES - Year 2021

  The paper is a comprehensive laboratory comparison study of two galvanic isolated solution off-board battery chargers: (1) Si-based cost-effective case, and (2) SiC-bidirectional ready for vehicle to grid concept case. All circuits are modular, and in both cases the DC/DC converter can be replaced according to the end user requirements (the coupled transformer remains the same and is constructed based on 12xC100 cores to avoid...

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• Experience in practical implementation of DAC system in EC Gdańsk.

  Publication

  • M. F. Jaskólski

  - Year 2005

  W referacie przedstawiono informacje dotyczące wdrożonego w EC Gdańsk pilotowego adsorpcyjnego systemu klimatyzacji. Przedstawiono zasady działania systemu oraz wybrane parametry jego pracy.

• Four level inverter's DC bus voltage balancing with 3-terminal DAB converter

  Publication

  • M. Grabarek
  • R. Strzelecki
  • V. Tomasov
  • D. Vinnikov

  - Year 2016

  —Multilevel inverters become more and more popular, especially in the medium or high voltage and high power applications. Unfortunately, some of inverter topologies require additional DC bus voltage balancing systems. This paper presents a novel approach to such systems, which is based on a multiple terminal DAB converter. Along with the voltage balancing function the proposed solution enables the connection of energy storage devices...

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• Przetwornica rezonansowa LLC AC-DC w układzie półmostka

  Publication

  • G. Kilijański
  • I. Tokarski
  • M. Turzyński

  - Zeszyty Studenckiego Towarzystwa Naukowego - Year 2014

  W artykule przedstawiono rezultaty prac nad rezonansową przetwornicą AC/DC typu LLC w układzie półmostka o mocy 100W. Układ sterowania przetwornicy został opracowany w oparciu o dedykowany sterownik UCC25600 (Texas Instrumens). W pracy przedstawiono koncepcję przetwornicy oraz porównano właściwości opracowanej przetwornicy z komercyjnie dostępnym układem typu Flyback.

• Experimental investigations of DAC Systems operating in VAV Control mode

  Publication

  • M. F. Jaskólski

  - Year 2007

  Praca przedstawia techniczne aspekty wykorzystania ciepła sieciowego w bezsprężarkowych, adsorpcyjnych systemach klimatyzacyjnych na przykładzie zrealizowanej instalacji w EC Gdansk.Zaprezentowano również stanowisko oraz wyniki badań eksperymentalnych doyczących wpływu zmian parametrów przepływowych powietrza wilgotnego na efektywność pracy regeneratorów ciepła.