Essays about: "växling"

Showing result 1 - 5 of 27 essays containing the word växling.

  1. 1. Radiation Effects on GaN-based HEMTs for RF and Power Electronic Applications

    University essay from KTH/Tillämpad fysik

    Author : Wilhelm Holmberg; [2023]
    Keywords : High Electron Mobility Transistor; HEMT; Gallium Nitride; GaN; Silicon Carbide; SiC; Proton Radiation; Galliumnitrid; GaN; Kiselkarbid; SiC; Kisel; Si; HEMT; Transistor; Protonstrålning;

    Abstract : GaN-HEMTs (Gallium Nitride-based High Electron Mobility Transistors) have, thanks to the large band gap of GaN, electrical properties that are suitable for applications of high electrical voltages, high currents, and fast switching. The large band gap also gives GaN-HEMTs a high resistance to radiation. READ MORE

  3. 2. Safe autonomous lane-switching controller using high-order control barrier and Lyapunov functions

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Arno Frauenfelder; [2023]
    Keywords : ;

    Abstract : With the rising interest in autonomous vehicles due to developments with electric cars and computer vision, controllers that provide safe, collision free manoeuvres are crucial for the advancement of this technology. In this thesis, a controller for autonomous vehicles for safe, collision-free lane switching on highways including adaptive cruise control is proposed. READ MORE

  4. 3. Access Point Selection and Clustering Methods with Minimal Switching for Green Cell-Free Massive MIMO Networks

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Qinglong He; [2022]
    Keywords : Cell-free massive MIMO; multi-objective optimization; deep reinforcement learning; AP switch ON OFF; energy efficiency; Cellfri massiv MIMO; multiobjektiv optimering; djup förstärkningsinlärning; AP switch ON OFF; energieffektivitet;

    Abstract : As a novel beyond fifth-generation (5G) concept, cell-free massive MIMO (multiple-input multiple-output) recently has become a promising physical-layer technology where an enormous number of distributed access points (APs), coordinated by a central processing unit (CPU), cooperate to coherently serve a large number of user equipments (UEs) in the same time/frequency resource. However, denser AP deployment in cell-free networks as well as an exponentially growing number of mobile UEs lead to higher power consumption. READ MORE

  5. 4. Combining energy harvesting sources for increased system availability and using an input switching algorithm to maximise battery lifetime

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Anton Hylander; [2022]
    Keywords : ;

    Abstract : Energy harvesting is commonly used for powering low power electronics, for example Low Power Wide Area Networks (LPWAN). Many energy sources are natural (e.g. solar or wind), thus the harvested power can depend on weather, time of day, and time of year. READ MORE

  6. 5. Impact of smart EV charging on grid network with PV and BESS : Case study for Hammarby Sjöstad

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Mutayab Khalid; [2021]
    Keywords : Electric vehicles EV ; EV chargers; distribution network; optimization; PV storage; battery energy storage system BESS ; power flow analysis; charger scheduling; Elfordon EV ; EV -laddare; distributionsnät; optimering; PV lagring; batterilagringssystem BESS ; effektflödesanalys; laddarschemaläggning;

    Abstract : The transition in the transport sector by the integration of battery electric vehicles (BEVs) brings a new challenge for the system operators to ensure the balance between supply and demand. The installation of new EV charges poses a surge in electricity demand in the coming years which jeopardizes the grid reliability and stability. READ MORE