Search for dissertations about: "converter efficiency"

Showing result 11 - 15 of 77 swedish dissertations containing the words converter efficiency.

  1. 11. Reliable and Efficient Microwave Circuits for Space Applications

    Author : Andreas Ådahl; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ZBD; PA; Class E; Zero Bias Diode; LDMOS; Mixer; MMIC; Satellite; Balun; Inverse class F; Novel; Multiplier; mHEMT; Power amplifier; Converter;

    Abstract : In this thesis, reliable and efficient microwave circuits used in space applications, e.g. satellite transponder systems, are discussed. The main focus is on mixers, multipliers and power amplifiers. READ MORE

  2. 12. Investigation of a Multilevel Inverter for Electric Vehicle Applications

    Author : Oskar Josefsson; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Plug-in Electric Vehicle PEV ; Electric Vehicle EV ; LiFePO4.; Integrated Charger; Efficiency; Drive Cycle; Battery modelling; Multilevel Inverter MLI ; Two-level Inverter TLI ;

    Abstract : Electrified vehicles on the market today all use the classical two-level inverter as the propulsion inverter. This thesis analyse the potential of using a cascaded H-bridge multilevel inverter as the propulsion inverter. READ MORE

  3. 13. Highly-Efficient Energy Harvesting Interfaces for Implantable Biosensors

    Author : Janko Katic; Ana Rusu; Saul Rodriguez; Gabriel Rincón-Mora; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy harvesting interface; thermoelectric generator; glucose biofuel cell; power management; dc-dc converter; boost converter; zero-current switching; zero-voltage switching; implantable biosensor; Energiskördsgränssnitt; termoelektrisk generator; glukosbiobränslecell; energihantering; DC-DC-omvandlare; boost-omvandlare; inplanterbar biosensor; Informations- och kommunikationsteknik; Information and Communication Technology;

    Abstract : Energy harvesting is identified as an alternative solution for powering implantable biosensors. It can potentially enable the development of self-powered implants if the harvested energy is properly handled. This development implies that batteries, which impose many limitations, are replaced by miniature harvesting devices. READ MORE

  4. 14. Control and Design Aspects of Components and Systems in High-Voltage Converters for Industrial Applications

    University dissertation from Stockholm : KTH

    Author : Per Ranstad; Hans-Peter Nee; Alfred Rufer; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-voltage converter; resonant converter; high-voltage transformer; transformer parasitics; IGBT; soft-switching; control; TECHNOLOGY Electrical engineering; electronics and photonics Electric power engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elkraftteknik;

    Abstract : High-frequency dc-dc converters are widely used in power electronic applications, both in consumer products and industrial products. By operating the converter at higher frequencies both a smaller size and better control characteristics can be obtained. READ MORE

  5. 15. On soft-switching isolated AC/DC converters without auxiliary circuit

    University dissertation from Stockholm : KTH

    Author : Staffan Norrga; Stefan Östlund; Rik De Doncker; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical power technology; voltage source converter; cycloconverter; isolated converter; medium frequency transformer; soft switching; modulation; commutation; wind power; electric traction; Elkraftteknik; TECHNOLOGY Electrical engineering; electronics and photonics Electric power engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elkraftteknik;

    Abstract : The thesis is concerned with a class of power electronic converter systems that permit bidirectional AC/DC conversion with galvanic separation of the AC and DC sides by a transformer operating at elevated frequency. The systems consist of a capacitively snubbered voltage source converter and a cycloconverter, separated by the mentioned transformer. READ MORE