Sökning: "Teknisk fysik med inriktning mot elektricitetslära"

Visar resultat 1 - 5 av 65 avhandlingar innehållade orden Teknisk fysik med inriktning mot elektricitetslära.

1. 1. Broadband and HF Radiation from Cloud Flashes and Narrow Bipolar Pulses

   Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

   Författare :Noor Azlinda Ahmad; Uppsala universitet.; [2011]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lightning; Cloud Flashes; Narrow Bipolar Pulses; HF radiation; NATURAL SCIENCES Physics Other physics; NATURVETENSKAP Fysik Övrig fysik; Engineering Science with specialization in Atmospheric Discharges; Teknisk fysik med inriktning mot atmosfäriska urladdningar;

   Sammanfattning : Remote measurement of electric field generated by lightning has played a major role in understanding the lightning phenomenon. Even though other measurements such as photographic and channel base current have contributed to this research field, due to practical reasons remote measurements of electric field is considered as the most useful tool in lightning research. LÄS MER

3. 2. Electromagnetic Analysis of Hydroelectric Generators

   Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

   Författare :Martin Ranlöf; Uppsala universitet.; [2011]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contra-rotating rotors; damping torque; damper winding; finite element method; hydroelectric generators; permeance model; pole shoe shape; rotational losses; single machine infinite bus; slot ripple; synchronizing torque; synchronous machines; voltage waveform.; TECHNOLOGY Engineering physics; TEKNIKVETENSKAP Teknisk fysik; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : Hydropower maintains its position as the most important source of renewable electric energy in the world. The efficiency of large hydropower plants is unsurpassed, and after more than hundred years of development, the technology is mature and highly reliable. LÄS MER

4. 3. Positive streamer discharges in air and along insulating surfaces: experiment and simulation

   Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

   Författare :Mose Akyuz; Uppsala universitet.; [2002]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; Teknisk fysik; TECHNOLOGY Engineering physics; TEKNIKVETENSKAP Teknisk fysik; teknisk fysik med inriktning mot atmosfäriska urladdningar; Engineering Physics; with a direction to Atmospheric Discharges;

   Sammanfattning : The power quality of modern society relies on the electrical properties of the dielectric insulators used in the power industry. Much research work has been conducted with an aim to understand and predict the insulating behaviour of such materials under different kinds of atmospheric conditions, but still there are many unsolved problems. LÄS MER

5. 4. Dynamic Processes and Active Power Control of Hydropower Plants

   Detta är en avhandling från Uppsala : Institutionen för teknikvetenskaper; Elektricitetslära

   Författare :Weijia Yang; Uppsala universitet.; [2015]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : Hydro-electricity plays an important role in the safe, stable and efficient operation of electric power systems. Frequency stability of power systems refers to the ability to maintain steady frequency following a severe system upset resulting in a significant imbalance between generation and load. LÄS MER

7. 5. Marine Current Resource Assessment Measurements and Characterization

   Detta är en avhandling från Uppsala : Institutionen för teknikvetenskaper

   Författare :Nicole Carpman; Uppsala universitet.; [2015]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ADCP; Teknisk fysik med inriktning mot elektricitetslära; Engineering Science with specialization in Science of Electricity;

   Sammanfattning : The increasing interest in converting energy from renewable resources into electricity has led to an increase in research covering the field of marine current energy, mainly concerning tidal currents and in-stream tidal turbines. Tides have the advantage of being predictable decades ahead. LÄS MER