Search for dissertations about: "Flywheels"

Showing result 1 - 5 of 12 swedish dissertations containing the word Flywheels.

  1. 1. Power Control Systems in a Flywheel based All-Electric Driveline

    Author : Janaína Gonçalves de Oliveira; Hans Bernhoff; Mats Leijon; Torbjörn Thiringer; Uppsala universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Flywheels; batteries; electric vehicles; control systems; power electronics; electric machines; efficiency.; Electric power engineering; Elkraftteknik; Electrical engineering; Elektroteknik; Electronics; Elektronik; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : Flywheel systems are attractive in hybrid and electric vehicles due to their ability to handle power during acceleration and braking. The combination of a flywheel device with a battery source has several advantages such as high peak power capacity, high energy density and reduction in the number of charge/discharge cycles of the battery. READ MORE

  2. 2. Dual mass flywheels in truck powertrains, Modelling, simulations and validation

    Author : Lina Wramner; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DMF; simulations; heavy-duty truck; resonances; driveline; dual mass flywheel; powertrain; torsional vibrations; friction;

    Abstract : The heavy-duty vehicle manufacturers face large challenges when it comes to reducing CO2 emissions from vehicles. The on-going development of more efficient combustion engines leads to an increase in torsional vibrations. READ MORE

  3. 3. Electrified Integrated Kinetic Energy Storage

    Author : Magnus Hedlund; Hans Bernhoff; Markus Mueller; Uppsala universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; flywheel energy storage; magnetic bearings; carbon composite; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : The electric car is a technically efficient driveline, although it is demanding in terms of the primary energy source. Most trips are below 50 km and the mean power required for maintaining speed is quite low, but the system has to be able to both provide long range and high maximum power for acceleration. READ MORE

  4. 4. Torsional vibration absorbers in heavy-duty truck powertrains

    Author : Lina Wramner; Chalmers University of Technology; []
    Keywords : PSVA; DMF; tuned vibration absorber; TVA; heavy-duty truck; powertrain; anti-resonance; resonances; torsional vibrations; dual mass flywheel; driveline; power split vibration absorber; friction; simulations;

    Abstract : The heavy-duty vehicle manufacturers face large challenges when it comes to reducing CO2 emissions from vehicles. The ongoing development of more efficient combustion engines leads to an increase in torsional vibrations. READ MORE

  5. 5. Kinetic Energy Storage and Magnetic Bearings, for vehicular applications

    Author : Johan Abrahamsson; Uppsala universitet; []
    Keywords : ;

    Abstract : One of the main challenges in order to make electric cars competitive with gaspowered cars is in the improvement of the electric power system. Although many of the energy sources currently used in electric vehicles have sufficiently high specific energy, their applicability is limited due to low specific power. READ MORE