Sökning: "Transformator lindningar"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden Transformator lindningar.

  1. 1. Shielding of Transformer Stray Fields in Trains

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Lárusdóttir Lára Ólafia; [2022]
    Nyckelord :;

    Sammanfattning : Generally, a transformer will produce stray magnetic fields. Aboard trains, the transformer’s stray fields can pose problems to other components inside or outside the train. Further, regulations require the magnetic field to be below certain levels in the passenger area. LÄS MER

  3. 2. Characterizing coil windings noise due to compressive fault currents : A study to determine if there is a characteristic noise from transformer windings due to fault currents

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Simon Lundgren; [2022]
    Nyckelord :Transformer windings; short circuit forces; current pulses; microphone; Comsol Multiphysics; FFT; Transformator lindningar; strömpulser; mikrofon; kortslutingskrafter; Comsol Multiphysics; FFT;

    Sammanfattning : Transformers are essential for modern power distribution system. They are efficient and enable the voltages to be transformed up for transportation of electricity and back down for consumer use. The reliability of the transformer is affected by faults and fatigue of the copper. LÄS MER

  4. 3. Trådbromssystem : En fallstudie för implementering av bromssystem i en lindningsprocess

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Industriell teknik

    Författare :Fredrik Östman; Philip Melin; [2021]
    Nyckelord :automation; brake; construction; control of brakes; control of processes; HVDC; powertransformer; wire winding; automatisering; bromssystem; lindning; HVDC; skivbroms; transformator; trumbroms;

    Sammanfattning : For an energy efficient current transmission, high demands are set on the construction of transformers. One of the more significant parts is the winding that constitutes the core of the transformer. LÄS MER

  5. 4. Radialmåttavvikelser i Transformatorlindningar : Ett examensarbete hos Hitachi ABB Power Grids Ludvika

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Industriell teknik

    Författare :Johan Strandh; Viktor Ruda; [2021]
    Nyckelord :Transformer; transformer manufacturing; windings; tolerance stack up; quality assurance; tolerances; dimensional excess; power conductor; continuous transposed conductor; CTC; Transformator; högkraftstransformator; transformatortillverkning; kvalitetssäkring; toleransstapling; toleranser; måttöverskridning; högkraftsledare; CTCledare.;

    Sammanfattning : This assignment is based on the tolerance problems that occur with the radial dimensions or RR-dimensions for the windings. The purpose is to identify the various parameters that affect said RR-dimensions and where these parameters originate from to be able to assure quality of the winding process. LÄS MER

  7. 5. Optimal Demagnetization of Transformer After Winding Resistance Measurements

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Niclas Grönström; [2020]
    Nyckelord :;

    Sammanfattning : In this thesis, transformer demagnetization in connection to winding resistance tests is investigated. In transformer testing, winding resistance measurement (WRM) is an important test used to detect winding or connection faults. It is common practice to measure the resistance by injecting a DC current into the windings of a transformer. LÄS MER