Sökning: "windings"

Visar resultat 6 - 10 av 67 uppsatser innehållade ordet windings.

1. 6. 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

3. 7. Konstruktion av klippverktyg för blindslingeledare : Effektivisering av monteringsprocessen för lindningar itransformatorer med blindslingeledare

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Industriell teknik

   Författare :Oliwer Bendelin; Theodor Gunnberg-Querat; [2022]
   Nyckelord :concept choices; cutting mechanisms; cutting tools; power sources; product development; generation of concepts; machine safety; shield wire conductor; blindslingeledare; drivdon; klippmekanismer; klippverktyg; konceptgenerering; konceptval; maskinsäkerhet; produktutveckling;

   Sammanfattning : Hitachi Energy Power transformers in Ludvika wants to investigate the possibilities of developing a cutting tool to streamline one of the many processes for fabrication of windings in transformers. This thesis work at Uppsala University, which has been going on for ten weeks, has thus investigated the possibilities for a cutting tool by studying the basic necessary theories and user requirements that have consequently resulted in the generation of a proposed solution. LÄS MER

4. 8. Fatigue analysis of laser welded hairpins in electric car motors

   Kandidat-uppsats, Högskolan i Skövde/Institutionen för ingenjörsvetenskap

   Författare :Francisco Martín Ruiz; Imanol Iribar Rodriguez; [2022]
   Nyckelord :;

   Sammanfattning : Hairpins are copper filaments used in the windings in the stators of electric motors in modern times. For the motor to work, they have to be welded in pairs, normally with laser welding. Studying the fatigue response of the joint of hairpins welded with a set of values of laser welding process parameters is the main objective of this project. LÄS MER

5. 9. Design of current transformer energy harvesting power supply

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Oscar Bäckman; [2021]
   Nyckelord :Energy harvesting; Current transformer;

   Sammanfattning : This thesis explores the possible method to harvest energy from ambient sources around power transformers. These include magnetic induction and vibration. The objective is to create an energy harvester device that can output enough energy to power multiple sensors, wireless connectivity and an MCU. LÄS MER

7. 10. Omkonstruktion av bockverktyg : Från hydraulisk till elektrisk drivning

   Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Industriell teknik

   Författare :Johannes Skarin; Anders Nygren; [2021]
   Nyckelord :actuator; battery; bending; cad; ctc; copper; finite-element; transformer; bockning; batteri; cad; ctc; finita-elementmetoden; koppar; ställdon; transformator;

   Sammanfattning : A hydraulic bending tool is used in the manufacturing of transformer windings at Hitachi ABB Power Grids. This tool is used to create a pitch between the turns in the winding, a process which demands very strict tolerances during bending. Hitachi/ABB believes that the current tool is quite inconvenient and, in some cases, dangerous to use. LÄS MER