Search for dissertations about: "electromagnetic forces"

Showing result 21 - 25 of 38 swedish dissertations containing the words electromagnetic forces.

  2. 21. On Design and Analysis of a Novel Transverse Flux Generator for Direct-driven Wind Application

    Author : Dmitry Svechkarenko; Chandur Sadarangani; Zi-Qiang Zhu; KTH; []
    Keywords : Transverse flux machines; permanent magnet machines; finite element analysis; direct-driven generator; offshore wind turbine; renewable energy;

    Abstract : This thesis deals with the analysis of a permanent magnet synchronous generator suited for direct-drivenwind turbines inmegawatt class. The higher specific torque and power density of a transverse flux permanent magnet machine in comparison to conventional radial-flux machines make it a promising solution for direct-driven wind turbine generators. READ MORE

  4. 22. Dynamic Modeling of Hydropower Generators

    Author : David Rondon; Jan-Olov Aidanpää; Rolf Gustavsson; Florian Thiery; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinkonstruktion; Machine Design;

    Abstract : Modeling the dynamics of hydropower generators has been the aim pursued by many studies, as providing a reliable model would lead to more cost-effective designs. Hydropower generators comprise many parts, tilting-pad bearings, shaft, rotor rim, and stator among them, that contribute to the system's nonlinearities. READ MORE

  5. 23. Applications of Laser-Plasma Acceleration

    Author : Kristoffer Svendsen; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; laser wakefield acceleration; betatron radiation; X-rays; X-ray imaging; phase-contrast imaging; VHEE; radiotherapy; radiography; fuel injector; tomography; beam focusing; atomizing sprays; nanowires; liquid mass; target normal sheath acceleration; applications; charged particles;

    Abstract : This thesis is dedicated to the investigation of laser-plasma particle acceleration concepts. Some of the work was focused on improving electron and proton acceleration for future applications, in terms of maximizing the particle energy and minimizing the divergence of the X-ray beams. READ MORE

  6. 24. Surface Plasmon Photonics: From Optical Properties of Nanoparticles to Single Molecule Surface-enhanced Raman Scattering

    Author : Hongxing Xu; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanoparticles; nanostructures; Mie theory; surface plasmon; surface-enhanced Raman scattering; single molecule spectroscopy;

    Abstract : With the rapid development of nanoscience and nanotechnology, surface plasmon photonics using metal nanoparticles and nanostructures gain increasing interest, not only for fundamental scientific studies, but also for electronic, optical, and sensor applications. In the nanoscale, the physical and chemical properties of metallic particles, especially their optical properties, strongly depend on size and shape, as well as on surrounding media and structures. READ MORE

  7. 25. Electric Machine Control for Energy Efficient Electric Drive Systems

    Author : Andreas Andersson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modulation techniques; permanent magnet synchronous machine PMSM ; Energy efficiency; inverter control.; noise assessment;

    Abstract : Over the past decade, electric vehicles has increasingly become an area of attention for both academia and industry, much due to challenges such as emissions legislation and the environmental impact of the transportation sector. The absence of the broadband noise from the internal combustion engine brings new acoustic challenges for electric propulsion applications. READ MORE