Search for dissertations about: "dc interface"

Showing result 21 - 25 of 46 swedish dissertations containing the words dc interface.

  2. 21. Converter Interfaced Distributed Generation - Grid Interconnection Issues

    Author : Fainan Magueed; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VSC; harmonics; LCL-filter; power quality; weak grid; voltage regulation; vector control; strong grid; distributed generation; intentional islanding; L-filter; voltage dips;

    Abstract : Distributed generation (DG) with a converter interface to the grid is found in many of the green power resources applications. In this thesis, the control of a voltage source converter (VSC), as the DG front end, is in focus regarding the power quality problems that could appear at the connection point. READ MORE

  4. 22. Tunnel Emitter Transistors

    Author : Erik Aderstedt; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TET; tunneling; siO2< sub>; tunnel emitter transistor; MOS; Ta2< sub>O5< sub>; silicon; high- #954; BICFET; dielectrics;

    Abstract : The Tunnel Emitter Transistor is based on the modulation of the tunnel current in a Metal Oxide Semiconductor (MOS) structure with an ultra-thin oxide layer. The modulation is accomplished by injecting charge to the oxide-semiconductor interface from a third terminal. READ MORE

  5. 23. Single-crystal Mo/V superlattices : growth, structure, and hydrogen uptake

    Author : Jens Birch; Jan-Erik Sundgren; Bruce M Clemens; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Fundamental studies concerning the growth, structural characterization and hydrogen uptake of single-crystal (00 l )-oriented Mo/V superlattices have been performed. The superlattices were grown by dual-target magnetron sputtering in pure Ar-atmosphere < 6·10-3 Torr on (001)-oriented MgO substrates. READ MORE

  6. 24. Cellulose-based electrical insulation materials : Dielectric and mechanical properties

    Author : Rebecca Hollertz; Lars Wågberg; Markus Biesalski; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose; dielectric materials; electrical insulation; nanocellulose; nanoparticles; streamer; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : The reliability of the generation and distribution of electricity is highly dependent on electrical insulation and is essential for the prosperity of our society and a ubiquitous part of our everyday life. The present study shows how some important material properties affect the electrical properties of cellulose-based electrical insulation systems which are used together with mineral oil in high-voltage transformers. READ MORE

  7. 25. Growth of Wide-Band Gap AlN and (SiC)x(AlN)1-x Thin Films by Reactive Magnetron Sputter Deposition

    Author : Sukkaneste Tungasmita; Gregory W. Auner; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The research presented in this thesis is focused on thin film synthesis of epitaxial wurtzite structure aluminum nitride (AlN) and related alloy, (SiC)x(AlN)1-x,by ultra-high-vacuum (UHV) reactive magnetron sputter deposition, on silicon carbide (6H-SiC) substrates. The emphasis of the work is on controlling the growth and quality of the films to be able to use the materials in electronic device applications. READ MORE