Sökning: "Fredrik Evestedt"

Hittade 2 uppsatser innehållade orden Fredrik Evestedt.

1. 1. 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

3. 2. Strömkontroll till aktiva magnetlager med noggrann och störningsreducerad strömmätning

   Uppsats för yrkesexamina på grundnivå, Elektricitetslära

   Författare :Fredrik Evestedt; Anders Karlsson; [2013]
   Nyckelord :Strömmätning; HALL-sensor; strömstyrning; induktiv last; störningsskydd; elektromagnetisk kompabilitet; energibesparing;

   Sammanfattning : There is always a need for more effective ways to store energy in order to reduce the human impact on the environment. One step on the way can be the use of flywheels as kinetic energy storage devices. Low frictional losses are essential for a flywheel to be effective. LÄS MER