Sökning: "Brushless excitation"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Brushless excitation.

1. 1. Vibration analysis of a fast response brushless excitation system

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

   Författare :Emma Pålsson; [2019]
   Nyckelord :vibrations; frequency analysis; FRBE; controlled rectification; hydropower; exciter; generator; fast response;

   Sammanfattning : The aim of this study is to measure and analyze vibrations on a fast response brushless exciter (FRBE) at a real hydropower plant and identify vibration origins through frequency analysis. Moreover, the observed vibrations are evaluated in relation to generator vibration standards and estimated tangential eigenfrequencies of the studied FRBE. LÄS MER

3. 2. Thermal modeling of power electronic components in excitation systems

   Uppsats för yrkesexamina på avancerad nivå,

   Författare :Fredrik Widberg; [2019]
   Nyckelord :Excitation systems; Power electronics; Thermal modeling;

   Sammanfattning : This thesis work aims at developing a model in Visual Basic for Applications and Microsoft Excel that can be used to predict temperatures in semiconductor devices for two commercial products made by Voith Hydro AB, and via simulation of the model determine the maximum current that can be conducted through the two products. The two products are called field exciters. LÄS MER

4. 3. Construction, testing and verification of a brushless excitation system with wireless control of the field current in a synchronous generator.

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

   Författare :Rickard Larsson; Kenny Andersson; [2018]
   Nyckelord :Brushless excitation; synchronous generator; bluetooth; torque ripple; Borstlös matning; synkrongenerator; blåtand; momentpulsationer;

   Sammanfattning : Synchronous generators have been used in hydropower from more than a century where, traditionally, the field current is transferred to the rotor using slip rings and carbon brushes. There are some major disadvantages following the use static excitation; regular and expensive maintenance, as well as a source of carbon dust which, due to buildup, may cause short circuits. LÄS MER

5. 4. Wireless control and measurement system for a hydropower generator with brushless exciter

   Master-uppsats, Uppsala universitet/Elektricitetslära

   Författare :Fredrik Evestedt; [2015]
   Nyckelord :brushless exciter; magnetic field measurement; wireless communication; printed circuit board; hydropower;

   Sammanfattning : Hydropower has been around for more than a century and is considered a mature technology, but with recent advancements in power electronics and simulation capability new exciting ways to increase efficiency and reliability is possible. At Uppsala University a brushless exciter has been constructed for the experimental test rig, SVANTE. LÄS MER

7. 5. An automatic voltage regulating system with Bluetooth communicating devices for brushless excitation of a synchronous generator

   Uppsats för yrkesexamina på avancerad nivå, Elektricitetslära

   Författare :Eyuel Tibebu; [2013]
   Nyckelord :Synchronous generator; excitation; exciter; Bluetooth; PLC; AVR;

   Sammanfattning : This thesis has been performed in order to earn a master's degree in electrical engineering. The task was to implement an automatic voltage regulator, AVR, to control the terminal voltage of the synchronous generator Svante at the Division of Electricity at Uppsala University. LÄS MER