Sökning: "Stray current"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden Stray current.

  1. 1. Magnetic field separation for current prediction in three-phase systems : Regression-based current prediction

    Master-uppsats, Mälardalens universitet/Akademin för innovation, design och teknik

    Författare :Sara Lenman; Sofia Blaad; [2023]
    Nyckelord :Alternating Current; Crosstalk Separation; Magnetic field sensors; Regression; Sensor technology; Three-phase system;

    Sammanfattning : Current controls the motion of a manipulator. The manipulators at ABB are powered by a three-phase alternating current system where shunt resistors are utilised to measure the current to the motors. Magnetic field sensors are instead investigated to eliminate issues with power losses, the number of components and the cost of the shunt resistors. LÄS MER

  3. 2. Stray capacitance study for HVDC Classic : The use of PSCAD and Mathcad to calculate the equivalent stray capacitance

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Saga Dalersand; Fredrik Gjöthlén; [2023]
    Nyckelord :;

    Sammanfattning : The reactors placed in the thyristor valve designed by Hitachi Energy have reactor losses which are dependent on the stray capacitance. To find out the stray capacitance, and further get to know the reactor losses, a PSCAD simulation is performed. LÄS MER

  4. 3. 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

  5. 4. 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. 5. Val och implementering av en varvtalssensor i växellådan på ett elektrifierat bandvagn

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Philip Eriksson; Erik Sandberg; [2021]
    Nyckelord :Bandwagon; Sensor; Hall effect; Eddy current; Bandvagn; Sensor; Halleffekt; Virvelström; CAD;

    Sammanfattning : This project was carried out in cooperation with the company BAE Systems Hägglunds AB in Örnsköldsvik, which produces vehicles for military as well as civil use. There is an ongoing project at BAE researching bandwagons using electricity as their source of energy, codename SIRIUS, and this investigation is part of it. LÄS MER