Search for dissertations about: "permanent magnet generators"
Showing result 1 - 5 of 27 swedish dissertations containing the words permanent magnet generators.
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1. Design of Rare Earth Free Permanent Magnet Generators
Abstract : Low speed permanent magnet (PM) synchronous generators (SGs) are commonly used in renewable energy. Rare earth (RE) PMs such as neodymium-iron-boron are a popular choice due to their high performance. READ MORE
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2. Demagnetization and Fault Simulations of Permanent Magnet Generators
Abstract : Permanent magnets are today widely used in electrical machines of all sorts. With their increase in popularity, the amount of research has increased as well. In the wind power project at Uppsala University permanent magnet synchronous generators have been studied for over a decade. READ MORE
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3. Design of Direct-driven Permanent-magnet Generators for Wind Turbines
Abstract : This thesis presents an investigation of how a direct-driven wind turbine generator should be designed and how small and efficient such a generator will be. Advantages and disadvantages of various types of direct-driven wind turbine generators are discussed, and a radial-flux permanent-magnet generator connected to a forced-commutated rectifier is chosen for a detailed theoretical investigation. READ MORE
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4. Rare Earth Metal–Free Permanent Magnet Generators
Abstract : Permanent magnet (PM) synchronous generators (SGs) are used in renewable energy production. The preferred PM material is neodymium-iron-boron (NdFeB), which has very high performance and, until recently, low cost. READ MORE
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5. Fast-response rotating brushless exciters for improved stability of synchronous generators
Abstract : The Norwegian Network Code FIKS from the Norwegian Transmission System Operator (TSO) Statnett, states that synchronous generators ≥ 25 MVA must have a static excitation system. It also includes requirements on the step time response and the available field winding ceiling voltage of the excitation system. READ MORE