Search for dissertations about: "converter"

Showing result 16 - 20 of 397 swedish dissertations containing the word converter.

  2. 16. Dimensioning Tools of MEA Actuator Systems, Including Modeling, Analysis and Technology Comparison

    Author : Mohsen Torabzadeh-Tari; Göran Engdahl; Hans Bernhoff; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dimensioning tools; MEA; More Electric Aircraft; EMA; Electro Mechanical Actuator; EM; Electrical Machine; Converter; Inverter; Finite Element Method; FEM; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Abstract : Aircraft design is an example of complex engineering where dimensioning tools can be valuable for the designers and decision makers in the early stage of the development process. These tools can be in form of a database over key numbers for different components or technologies. One of the critical parts of an aircraft is the actuator system. READ MORE

  4. 17. Reliable and Efficient Microwave Circuits for Space Applications

    Author : Andreas Ådahl; Chalmers tekniska högskola; []
    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

  5. 18. Some Extensions of Poincaré-Bendixson Theory Applied to a Resonant Converter

    Author : Jan Melin; Matematik LTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Datalogi; numerisk analys; system; kontroll; numerical analysis; systems; control; Naturvetenskap; Computer science; Natural science; Poincaré-Bendixson Theory; Limit Cycles; Resonant Converter; Distributions; Piecewise Linear Systems;

    Abstract : In this thesis existence and uniqueness of limit cycles are shown for a resonant converter, by extending Poincaré-Bendixson theory to non-smooth vector fields. We discuss relevant control theory and the role of simulations... READ MORE

  6. 19. System Aspects and Modulation Strategies of an HVDC-based Converter System for Wind Farms

    Author : Stephan Meier; Hans-Peter Nee; Boon-Teck Ooi; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Isolated AC DC Converter; Mutual Commutation; Soft Switching; Voltage Source Converter; Cycloconverter; Modulation Strategies; Medium-Frequency Transformer; HVDC Transmission; Wind Power; Wind Farms; Electric power engineering; Elkraftteknik; Electrical engineering; Elektroteknik;

    Abstract :   In this thesis, a new HVDC-based converter system for wind farms is investigated. It is based on a mutually commutated soft-switching converter system and provides a unique integrated solution for the wind turbine generator drive systems, the wind turbine interconnection, and the power conversion for HVDC transmission. READ MORE

  7. 20. Study on the dissolution of lime and dolomite in converter slag

    Author : Tengfei Deng; Sichen Du; Takeshi Yoshikawa; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dissolution; lime; limestone; dolomite; converter slag;

    Abstract : In the present study, the dissolution mechanism and rate of lime, limestone and dolomite in converter slag was studied. Lime dissolution in stagnant slag was studied first and dissolution of lime, limestone and dolomite under forced convection were carried out by new experimental setup. READ MORE