Sökning: "skin and proximity effects."

Hittade 5 uppsatser innehållade orden skin and proximity effects..

1. 1. Design and Construction of High Current Winding for a Transverse Flux Linear Generator Intended for Wave Power Generation

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

   Författare :Ahmed Amine Ramdani; Sebastian Rudnik; [2018]
   Nyckelord :Wave-power; transverse flux generator; winding; aluminum conductor; magnetic flux leakage; ocean energy; wave energy; wave energy generator; electromotive force; parallel strands; circulating currents; crowding effects; skin effect; proximity effect; eddy currents; racetrack effect; cable twisting; AlCu connection; enamel; polyamide-imide; dicloromethane; Vågkraft; transversalflödesgenerator; lindningsledare;

   Sammanfattning : There is currently a high demand for electric power from renewablesources. One source that remains relatively untapped is the motionof ocean waves. LÄS MER

3. 2. Skärmförluster i HVAC-Kabel : En utredning om kabelkonstruktionens inverkan på skärmförlusterna i trefas HVAC-kablar

   Kandidat-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

   Författare :Joel Johnsson; [2018]
   Nyckelord :Screen currents; Cable theory; Magnetism; Proximity effect; Skin effect; Eddy currents; HVAC; IEC 60287-1-1; Skärmstömmar; Kabelteori; Magnetism; Närhetseffekt; Skin-effekt; Virvelströmmar; HVAC; IEC 60287-1-1;

   Sammanfattning : Rapporten behandlar simuleringar, beräkningar och mätningar av HVAC-kablar. En genomgång presenteras av kabelteori samt de olika magnetiska och elektriska effekterna som påverkar skärmströmmarnas storlek. .. LÄS MER

4. 3. Study of Analytical Models for Harmonic Losses Calculations in Traction Induction Motors

   Master-uppsats, KTH/Skolan för elektro- och systemteknik (EES)

   Författare :Anaïs Maroteaux; [2016]
   Nyckelord :Analytical model; Bertotti; curve fitting; FEM 2D; harmonic losses; induction mo-tor; iron losses; Joule losses; skin and proximity effects.; Analytisk modell; Bertotti; kurvanpassning; FEM 2D; harmoniska förluster; asynkro-nmotor; järnförluster; Joule förluster; skineffekt och proximity effekt.;

   Sammanfattning : This Master Thesis deals with the study of analytical and finite-element (FE) models for calculation of losses in traction induction motors. Motors are fed through inverters for this type of application. Therefore, both fundamental and harmonic losses are considered. The study is done with one particular motor and one initial analytical model. LÄS MER

5. 4. Skin and proximity effect analysis of traction motor

   Uppsats för yrkesexamina på avancerad nivå, KTH/Elektrisk energiomvandling

   Författare :Ricardo Huaytia Fernandez; [2012]
   Nyckelord :;

   Sammanfattning : Traction motors are thermally pressed to obtain a high torque per unit volume at the same time as a relatively high frequency is used. Because of the high frequency the phenomenon skin effect and proximity effects appear, this is explored in the thesis. To find a link between the parasitic and thermal effects on the insulation is important. LÄS MER

7. 5. Potential of using Low Voltage Direct Current in local distribution network to improve the overall efficiency

   Uppsats för yrkesexamina på avancerad nivå, KTH/Elektriska energisystem

   Författare :Pierre Waeckerlé; [2011]
   Nyckelord :;

   Sammanfattning : This project reviews the potential of Low Voltage Direct Current (LVDC) to replace Low Voltage Alternative Current (LVAC) power in distribution grids. The study addresses three different problems: a comparative literature review on LVAC and LVDC systems, a study of the compatibility of the type of low voltage cables that are used in buildings with a future LVDC distribution grid and a technical comparison from transmission and conversion losses point of view. LÄS MER