Sökning: "Duty cycle"

Visar resultat 1 - 5 av 94 uppsatser innehållade orden Duty cycle.

  1. 1. Influence of pulsing on PVD TiAlN coating microstructure and mechanical properties : Master thesis project on the impact of deposition parameters on performance and properties of PVD titanium aluminum nitride.

    Master-uppsats, Karlstads universitet

    Författare :Marcus Roseen; [2023]
    Nyckelord :;

    Sammanfattning : This thesis investigates the influence of pulsing on the mechanical properties of PVD TiAlN coatings. The thesis focuses on defects caused by droplets during the arc-evaporation technique by altering the duty time, which affects mechanical properties. LÄS MER

  3. 2. Improved Testing Strategies from Standards for New Growing Battery Applications in the Industrial and E-mobility Sectors

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Francisco Javier Carreras; Claudia Ciminieri; [2023]
    Nyckelord :;

    Sammanfattning : In the current energy challenges, related to both climate change and the sudden rise in energy prices, batteries plays a key role in providing and storing energy. Before batteries are sent to market, the batteries are repeatedly subjected to different types of tests since it is crucial to verify that the performance and safety of these technologies are ensured in the different applications. LÄS MER

  4. 3. Crystallinity of Sputtered TiO2 Thin Films: a Study of the Heating and Plasma Influence on the Growth

    Master-uppsats,

    Författare :oussama ezzaher; [2023]
    Nyckelord :;

    Sammanfattning : AbstractHigh-Power Impulse Magnetron Sputtering (HIPIMS) of TiO2 thin films enhances their photocatalyticproperties compared to the films prepared by standard sputtering methods, especially when no substrateheating is employed. With no heating, the coatings present an amorphous structure that benefits from theionization of the sputtered flux granted by HiPIMS, with respect to their photocatalytic performance. LÄS MER

  5. 4. Analysis of a high step-up gain DC-DC converter for fuel cell and battery application

    Kandidat-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Kaj Törngren Sato; [2023]
    Nyckelord :Fuel cell; High step-up DC-DC converter; Boost converter; Coupled inductors; Coupling factor; CCM; DCM; Duty cycle;

    Sammanfattning : In sustainable energy systems those using fuel cells, high step-up gain converters are widely used to increase the output voltage to levels that can be used by other converters, such as inverters for grid connection or powering other AC loads. In order to obtain a higher voltage gain, in comparison to a traditional boost converter, often different topologies techniques are involved. LÄS MER

  7. 5. LoRa Based Moisture Sensing System

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och system

    Författare :Rasha Badran; [2023]
    Nyckelord :LoRa; moisture sensor; capacitive sensor;

    Sammanfattning : Water is an important parameter for crop growth, and the information about the moisture content in soil at different depths is very useful for farmers to determine the best time to water the soil and to irrigate farmland so as to maximize their yield. This thesis project aims to develop a prototype of a multi-depth moisture sensor probe that is part of a large sensing system used in agriculture. LÄS MER