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Found 3 essays matching the above criteria.

  1. 1. Consequences of Magnetic Properties in Stainless Steel for a High-efficiency Wave Power Generator

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Mohamed Sheikh Abdi; Yosef Gebresilassie; [2018]
    Keywords : stainless steel; wave power; permeability;

    Abstract : A new kind of wave power generator is being developed at KTH Royal Institute of Technology which potentially can reach an efficiency of 98 %. However, this generator’s small air gap sets strict requirements on the stiffness of the structure to withstand the large magnetic forces. The structure, therefore, need to be both stiff and non-magnetic. READ MORE

  3. 2. Kilowatt Three-phase Rotary Transformer Design for Permanent Magnet DC Motor with On-rotor Drive System

    University essay from Mittuniversitetet/Avdelningen för elektronikkonstruktion

    Author : Ye Xu; [2016]
    Keywords : contactless energy transfer; transformer power loss; iron loss; iron loss model; rotary transformer; three-phase transformer; finite element method; COMSOL Multiphysics; electrical steel; electrical steel manufacturing process;

    Abstract : The aim of this thesis is to design a kilowatt three-phase step-down rotary transformer for a permanent magnet DC motor. The permanent magnet DC motor has an on-rotor drive system, and therefore requiring a power supply that can transfer power to its drive unit without mechanical contact. READ MORE

  4. 3. New concept for the ground connection in Scania’s trucks and buses

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : ANDRÉS LLORENTE; [2014]
    Keywords : Electrical Contacts; Heavy-duty vehicles; Grounding; SRM Stud welding;

    Abstract : Regarding the ground electrical connection in trucks and buses, the requirements of earthing in heavy-duty vehicles were gathered and evaluated. The most important problems in the state-of-the-art grounding devices are corrosion, electrical resistance and uncertainty in the mounting process, altogether with depreciation over time. READ MORE