Essays about: "electric currents"

Showing result 1 - 5 of 37 essays containing the words electric currents.

  1. 1. The Influence of Electric Currents on Performance of Grease Lubricated Rolling Element Bearings

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Bharath Chanamolu; [2022]
    Keywords : Angular contact bearings; Bearing currents; Shaft voltages; Film thickness estimation; Electrical-capacitance method; Frictional moment measurements; Lubricant starvation; Vinkelkontaktlager; Lagerströmmar; Axelspänningar; Filmtjockleksuppskattning; Elektrisk-kapacitansmetod; Friktionsmomentmätningar; Smörjmedelsvält..;

    Abstract : The technological advancement in electrical machinery represents the need to understand the lubricant behaviour in the electrical environment. As shaft voltages are unavoidable in electrical machinery, developing new grease formulations and studying their performance against electric loads is required. READ MORE

  2. 2. The impact of ion drift in a Transcutaneous Electrical Stimulation model

    University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

    Author : Oscar Tuvesson; Erik Blåe; [2022]
    Keywords : TES; neuron activation; ion drift; conductivity; COMSOL; FEM; Technology and Engineering;

    Abstract : A major area of research in neuroscience is the effect of stimulating nerves into activation from extrinsic stimuli. This is commonly done with electric currents and external skin-contact electrodes. READ MORE

  3. 3. Methods to simulate resistance at high resolution and accuracy

    University essay from Uppsala universitet/Elektricitetslära

    Author : Ola Jansson; [2021]
    Keywords : variable resistance; digital potentiometer; potentiometer; simulate; resistance; variabel resistans; digital potentiometer; potentiometer; simulera; resistans;

    Abstract : In this paper, four methods to simulate or generate electric resistance at high resolution have been developed, tested and evaluated. Each method is called a Resistor Simulator and are numbered from one to four. READ MORE

  4. 4. Čerenkov emission of whistler waves by electron holes

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Nedjma Ouahioune; [2021]
    Keywords : Čerenkov; Whistler waves; Resonance; Electron holes; Plasma; Physics; Space Physics; Astronomy; Plasma waves; Instabilities; Čerenkov; visslarvågor; elektromagnetiska vågor; resonans; electron holes; plasma fysisk; rymdfysisk; astronomi; plasma vågor; instabilitet;

    Abstract : Electron holes are positively charged nonlinear structures in which trapped electrons are supported by a positive electrostatic potential. These structure are regularly observed in space and laboratory plasmas by means of diverging bipolar electric field signatures. READ MORE

  5. 5. Real-time stator resistance estimation for electrical drives : a control perspective

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

    Author : Fredric Sunesson; [2020]
    Keywords : ;

    Abstract : The automotive industry is in the middle of a rapid transition towards electrical machines. This transition leads to a higher interest in electrical machine management. In this thesis a stator resistance estimation scheme for field oriented controlled motors is proposed and tested in both simulations and experiments. READ MORE