Search for dissertations about: "wind turbine gearbox"

Showing result 1 - 5 of 6 swedish dissertations containing the words wind turbine gearbox.

  1. 1. Load and Risk Based Maintenance Management of Wind Turbines

    University dissertation from Chalmers University of Technology

    Author : Pramod Bangalore; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Artificial neural networks ANN ; condition monitoring system CMS ; life cycle cost; maintenance management; maintenance strategy; maintenance planning; optimization; supervisory control and data acquisition SCADA ; wind energy.;

    Abstract : The cost of maintenance is a considerable part of the total life cycle cost in wind turbines, especially for offshore applications. Research has shown that some critical components account for most of the downtime in the wind turbines. READ MORE

  2. 2. Load and risk based maintenance management of wind turbines

    University dissertation from Chalmers University of Technology

    Author : Pramod Bangalore; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Artificial neural network ANN ; condition monitoring system CMS ; life cycle cost; maintenance management; maintenance strategy; maintenance planning; optimization; supervisory control and data acquisition SCADA ; wind energy.;

    Abstract : Wind power has proven to be an important source of renewable energy in the modern electric power systems. Low profit margins due to falling electricity prices and high maintenance costs, over the past few years, have led to a focus on research in the area of maintenance management of wind turbines. READ MORE

  3. 3. Direct Driven Generators for Vertical Axis Wind Turbines

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Sandra Eriksson; Uppsala universitet.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; synchronous generator; wind power; vertical axis wind turbine; simulations; experiments; finite element method; TECHNOLOGY Engineering physics; TEKNIKVETENSKAP Teknisk fysik;

    Abstract : Wind power is a renewable energy source that is increasingly used all over the world. Most wind turbines have a horizontal axis of rotation but a few have a vertical axis of rotation. The concept presented in this thesis is a straight-bladed vertical axis wind turbine with a direct driven cable-wound permanent magnet synchronous generator. READ MORE

  4. 4. Design and Assessment of HVDC Off-shore Wind Turbine Generator

    University dissertation from Chalmers University of Technology

    Author : Poopak Roshanfekr Fard; Chalmers tekniska högskola.; Chalmers University of Technology.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high voltage direct current HVDC ; wind energy; interior permanent magnet synchronous generator IPMSG ; permanent magnet assisted synchronous reluctance generator PMa-SynRG ; finite element method FEM ; maximum torque per ampere MTPA ; annual energy efficiency.;

    Abstract : In this work, design and assessment of a 5 MW wind energy generator with a gearbox is performed to find an energy-efficient generator for HVDC offshore wind turbines, studying an interior permanent magnet synchronous generator (IPMSG) as well as a permanent magnet assisted synchronous reluctance generator (PMa-SynRG). Quantities such as torque density, torque ripple, losses and amount of magnet material are studied. READ MORE

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

    University dissertation from Chalmers University of Technology

    Author : Poopak Roshanfekr Fard; Chalmers tekniska högskola.; Chalmers University of Technology.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high voltage direct current HVDC ; wind energy; IGBT active rectifier; surface permanent magnet synchronous generator SPMSG ; interior permanent magnet synchronous generator IPMSG ; synchronous reluctance generator SynRG ; finite element method FEM ; dc-link voltage; diode passive rectifier; annual energy efficiency;

    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