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• W2798172545 abstract "The main focus of this work is the performance and the economical assessment of a radial flux generator that is used in wave power applications. The wave energy converter (WEC) used in this work is a point absorber, that is considered to move only in heave. The generation unit of the WEC consists of a permanent magnet machine and a power electronic converter. The straight and v-shaped interior mounted permanent magnet generators, surface mounted permanent magnet generator and neodymium and ferrite assisted synchronous reluctance generators are selected as the main generator designs to be studied in this work. These designs are analysed using finite element method (FEM) and the annual energy productions and losses are quantified. Furthermore, some design variations such as, different iron materials, stator slot geometries and a SiC MOSFET based converter are investigated, in order to assess the impact of a specific design variation on the energy efficiency. An economical evaluation of these variants using the life cycle cost (LCC) analysis is performed, in order to quantify the economical consequences of the energy losses during the operational life time, as well as determining the costs of the initial generator investment. The results obtained suggest favorableWEC generator types and design alterations for LCC improvements. An important finding is that the PM assisted SRM generator provides the best energy performance, given the same geometry and material limitations. The annual energy production achieved by the SMPM generator is fairly similar to that of the IPM generator, despite not being able to provide the required torque at high speed operations, since the high speed operations occur rarely. Moreover, it is found that the poor field weakening trajectory of the SMPM can be improved by placing iron pieces at magnet sides. Another interesting result is that even though the annual energy production is increased when the rotor material is replaced by a cobalt-iron, due to its high costs, this design was not found economically favorable. The design variation that improves the electric generation system of theWEC to the highest degree is found to be the SiC MOSFET based converter design, rather than the IGBT variant. The annual energy losses decrease by 5 MWh, due to up to 3 times lower converter losses. Owing to the substantial energy improvement, the SiC MOSFET case is the economically favorable choice compared to the generation system that uses an IGBT converter, despite theMOSFET modules being 7 times more costly than its IGBT counterpart." @default.
• W2798172545 created "2018-04-24" @default.
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• W2798172545 date "2018-01-01" @default.
• W2798172545 modified "2023-09-24" @default.
• W2798172545 title "Performance Evaluation and Life Cycle Cost Analysis of the Electrical Generation Unit of a Wave Energy Converter" @default.
• W2798172545 hasPublicationYear "2018" @default.
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