Sökning: "Liquid dielectric"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Liquid dielectric.

1. 1. Analysis of high-voltage low-current DC/DC converters for electrohydrodynamic pumps

   Kandidat-uppsats, Uppsala universitet/Institutionen för elektroteknik

   Författare :Sigge Axelsson; Jonas Gartner; Axel Stafström; [2023]
   Nyckelord :high-voltage; low-current; low-power; DC DC; DC-DC; high-gain; converter; electrohydrodynamic pump; EHD; transformerless converter; Royer-based converter; resonant Royer oscillator; Cockroft-Walton voltage multiplier; CWVM; voltage multiplier; series-connected positive-negative voltage multiplier; SPNVM; planar air-core transformer; planar transformer; high-freqency Royer-based converter; overcurrent protection; LT8331; gallium nitride; GaN; planar PCB-integrated transformers;

   Sammanfattning : Moving parts cause vibrations and tend to wear out. In applications where maintenance is complicated, solutions without moving parts are therefore advantageous. Electrohydrodynamic pumps are such a solution. Instead of mechanical propulsion, they use strong electric fields to induce movement in a dielectric cooling liquid. LÄS MER

3. 2. Investigation of MIDEL 7131’s Dielectric Breakdown Strength and Thermal Behaviour : Master Thesis, an experimental study using concentric-like electrodes at elevated temperatures to study breakdowns

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

   Författare :Kim Lin; [2023]
   Nyckelord :Dielectric strength; High voltage; Liquid dielectric; MIDEL 7131; Electrical breakdown; Temperature cycle; Dielektrisk styrka; Högspänning; Dielektriska vätskor; MIDEL 7131; Elektrisk nedbrytning; Temperaturcykling;

   Sammanfattning : Dielectric insulation are constantly exposed to various stresses, while also being expected to last for long periods of time. Naturally, they degrade with use and in demanding operational environments, this degradation phenomena can be accelerated, leading to costly consequences. LÄS MER

4. 3. Fabrication of sub-10 nm solid-state nanopores by electrical breakdown

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

   Författare :Kasumi Tsutsumi; [2023]
   Nyckelord :Nanopore fabrication; Solid-state material; Silicon nitride; Graphene; DNA translocation; Nanopor-avkänning; fast tillståndsmaterial; kiselnitrid; grafen; DNA-translokation;

   Sammanfattning : Nanopore sensing is a versatile technique that employs very small openings, known as nanopores, to study biomolecules. The use of nanopores on solid-state membranes has gained attention due to its potential for low-cost and high-throughput sensing of single molecules in liquids. LÄS MER

5. 4. Testbed Development for Non-invasive Intracranial Pressure Monitoring with a Microwave based Electromagnetic Skin Patch Sensor

   Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Tillämpad materialvetenskap

   Författare :Sandra Palm; Hassan Saado; [2021]
   Nyckelord :Intracranial pressure; Artificial cerebrospinal fluid; Biomedical engineering; Microwave sensor;

   Sammanfattning : Traumatic brain injuries (TBIs) are a major public health problem worldwide where the symptoms can be anything from mild concussion to severe swelling of the brain tissue. As a result of TBI the intracranial pressure (ICP) can elevate to pathological levels with severe consequences such as hypoxia, ischemia and brain hemorrhage. LÄS MER

7. 5. An evaluation of materials and processes suitable for manufacturing micro HASEL-actuators

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Mikrosystemteknik

   Författare :Anna Lindgren; [2021]
   Nyckelord :HASEL-actuator; paraffin blend;

   Sammanfattning : HASEL-actuators use dielectric liquids and compliant shells as their media. This type of actuatorwould suit the actuators used as fins for soft milli robots (SOMIRO). These robots are going tobe used in aquaponic crops for studying its impact on the environment to help the farmersimprove their crops. LÄS MER