Search for dissertations about: "rectifier"

Showing result 1 - 5 of 44 swedish dissertations containing the word rectifier.

  2. 1. Junction Barrier Schottky Rectifiers in Silicon Carbide

    Author : Fanny Dahlquist; KTH; []
    Keywords : silicon carbide; JBS rectifier; Junction Barrier Schottky JBS ; Schottky rectifier; MPS rectifier; power rectifier; punch-through design; power loss; high blocking voltage;

    Abstract : .... READ MORE

  4. 2. Junction barrier schottky rectifiers in silicon carbide

    Author : Fanny Dahlquist; KTH; []
    Keywords : Silicon carbide; JBS rectifier; Junction Barrier Schottky JBS ; Schottky rectifieer; Power rectifier; Unipolar devices; Punch-through design;

    Abstract : .... READ MORE

  5. 3. Energy-efficient Generating System for HVDC Off-shore Wind Turbine

    Author : Poopak Roshanfekr; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface permanent magnet synchronous generator SPMSG ; IGBT active rectifier; high voltage direct current HVDC ; wind energy; dc-link voltage; synchronous reluctance generator SynRG ; annual energy efficiency; diode passive rectifier; finite element method FEM ; interior permanent magnet synchronous generator IPMSG ;

    Abstract : This thesis investigates the design of energy efficient generating systems for off-shore wind turbines. For the generator part of the electric drive system, a surface mounted permanent magnet synchronous generator (SPMSG), an interior permanent magnet generator (IPMSG) as well as a synchronous reluctance generator (SynRG) have been investigated. READ MORE

  6. 4. On Control of Back-to-Back Converters and Sensorless Induction Machine Drives

    Author : Rolf Ottersten; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active filtering; flux estimation; sensorless control; induction motor; back-to-back converter; pulsewidth-modulated rectifier; virtual flux; vector current control;

    Abstract : This thesis focuses on design and analysis of the control system structure for back-to-back converter squirrel-cage induction machine drives. Particularly, sensorless control of induction machines, meaning vector control without a mechanical shaft sensor, and vector control of pulsewidth-modulated (PWM) rectifiers are considered. READ MORE

  7. 5. Cost-effective Cells for High-power Modular Multilevel Converters

    Author : Matthijs Heuvelmans; Staffan Norrga; Hans-Peter Nee; Rik De Doncker; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MMC; modular multilevel converter; ARCP; IGCT; soft-switching; ZVS; ZCS; snubber; thyristor; SCR; silicon controlled rectifier; HVDC; STATCOM; Electrical Engineering; Elektro- och systemteknik;

    Abstract : The modular multilevel converter (MMC) topology was introduced in 2003and has since been receiving considerable attention from industry and academia.Notable benefits compared to two- or three-level voltage source convertersare its scalability, low switching losses, low output filter requirementsand ease of adding redundancy combined with fail-safe operation. READ MORE