Essays about: "electric current"

Showing result 1 - 5 of 222 essays containing the words electric current.

  1. 1. Future network loading and tariffs with electric vehicles

    University essay from Lunds universitet/Industriell elektroteknik och automation

    Author : Axel Philipson; Hampus Lavin; [2017]
    Keywords : Technology and Engineering;

    Abstract : Electric vehicles have received a lot of attention lately and are expected to boom in the near future. In the power grid industry this raises concern on whether the grid is dimensioned to handle the power peaks related to charging. Solar cells are also a hot topic when discussing future energy supply and how it will impact on the grid. READ MORE

  2. 2. Bearing current and shaft voltage measurement in electrical motors

    University essay from Högskolan Väst/Avdelningen för data-, elektro- och lantmäteriteknik

    Author : Edo Kolic; [2017]
    Keywords : Modulated drive; electrical motors; production;

    Abstract : Due to the fast-rising voltage pulses of pulse width modulated drives, the generated shaft voltage of electrical motors causes electrical discharge currents in bearings. These discharges can cause bearing failure leading to costly maintenance and unexpected production stops. READ MORE

  3. 3. Electric Field Domains in Quantum Cascade Lasers

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Author : Tim Almqvist; [2017]
    Keywords : quantum cascade laser; QCL; electric field domain; EFD; NDR; negative differential resistivity; simulations; Tim; Almqvist; kvantkaskadlaser; Physics and Astronomy;

    Abstract : Quantum cascade lasers (QCLs) are periodic semiconductor heterostructures, capable of producing laser gain. They have become an important source of coherent radiation in the mid infrared, and THz frequency regions. QCLs are non-linear electric devices, and often have bias regions of negative differential resistivity (NDR). READ MORE

  4. 4. Load-current response to severe changes of voltage

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Shuhan Ma; [2017]
    Keywords : ;

    Abstract : Electric loads, such as computers, lamps, refrigerators and heaters connected to low-voltage distributionsystems in homes and offices differ widely in how their current responds to changes in the applied voltage.These voltage changes could be a total collapse of the voltage, a weak or strong reduction of amplitude,or a sudden phase-shift. READ MORE

  5. 5. Simulation and Optimization of a Hybrid Renewable Energy System for application on a Cuban farm

    University essay from Uppsala universitet/Fasta tillståndets fysik

    Author : Malin Frisk; [2017]
    Keywords : renewable energy; hybrid energy system; Cuba;

    Abstract : This paper presents an analysis of the feasibility of utilizing a hybrid renewable energy system to supply the energy demand of a milk and meat farm in Cuba. The study performs simulation and optimization to obtain a system design of a hybrid renewable energy system for application on the farm Desembarco del Granma in the Villa Clara province in the central part of Cuba, for three different cases of biomass availability. READ MORE