Sökning: "överton"

Hittade 4 uppsatser innehållade ordet överton.

  1. 1. Quality Control in Aluminium Profiles : Non-destructive Methods using Non-linear Ultrasonic

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Viktor Svensson; Robin Raymundsson; [2023]
    Nyckelord :Acoustic; defect; detection; harmonic; Akustisk; defekt; detektion; överton;

    Sammanfattning : When aluminium profiles are manufactured, defects may arise, especially when theprofiles are manufactured through extrusion. During the extrusion process, thesedefects occur on parts of the extruded material because of contaminates that needto be found. LÄS MER

  3. 2. Active filter circuit and control methods to reduce energy storage

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

    Författare :Daniele Petrili; [2016]
    Nyckelord :;

    Sammanfattning : The high market demand for power electronics converters nowadays requires converters with high power quality, great reliability and low cost. However, there are several challenges related to these systems, one relevant example is the energy ripple in the DC bus for single phase converters which causes problems such as overheating and reduction of the capacitor lifetime. LÄS MER

  4. 3. RCC-Jordfelsskydd, mätmodul för övertonsanalys

    M1-uppsats, JTH, Data- och elektroteknik

    Författare :Johan Hollander; [2009]
    Nyckelord :fft; dft; korrelation; överton; rcc;

    Sammanfattning : The majority of all power cuts that affects individuals and communities are caused by earth faults on the power transmission lines at 10kV and 20kV level [1]. If these power cuts could be eliminated, less disturbances and interrupts would lead to large amounts of money savings. Swedish Neutral has developed such a protection system. LÄS MER

  5. 4. Mätningar och analys av elnätet hos FHP, Basproduktion

    Uppsats för yrkesexamina på grundnivå, Institutionen för teknik och naturvetenskap

    Författare :Pär Söderström; [2003]
    Nyckelord :Datavetenskap; Övertoner; överton; elkvalité; elkvalitet; Datavetenskap;

    Sammanfattning : This report is a degree project performed at Freudenberg Household Products AB, (FHP). The degree project comprises measurement and analysis of the power net at FHP Basproduction. The content is divided between one theory-part, one document- part with measurements and also conclusions and a list of measures to be taken. LÄS MER