Sökning: "flywheel"

Visar resultat 6 - 10 av 23 avhandlingar innehållade ordet flywheel.

  1. 6. Power Control Systems for PM Synchronous Flywheel Alternators

    Författare :Janaína Goncalves de Oliveira; Uppsala universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Flywheel systems are attractive in hybrid and electric vehicles, being able to handle the large power when accelerating and for regenerative braking. The combination of a flywheel device with a battery source has several advantages, such as higher peak power capacity, higher energy density and a decrease of the number of charging/discharging cycles in the battery. LÄS MER

  3. 7. AFPM Motor/Generator Flywheel for Electric Power Stabilization

    Författare :Juan de Santiago Ochoa; Uppsala universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The study of a motor/generator for flywheel energy storage, meant to smooth the power transients in a vehicular power train, is expounded in this licentiate thesis. The proposed motor/generator has two sets of windings in the stator, rated at different power and voltage levels, and a significant moment of inertia to store energy in the form of rotational kinetic energy. LÄS MER

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

    Författare :Janaína Gonçalves de Oliveira; Hans Bernhoff; Mats Leijon; Torbjörn Thiringer; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  5. 9. Acute and early chronic responses to resistance exercise using flywheel or weights

    Författare :Lena Norrbrand; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Weight training typically offers constant external load during coupled shortening (concentric) and lengthening (eccentric) muscle actions in sets of consecutive repetitions until failure. However, skeletal muscle inherently has the capability to produce greater force in the eccentric compared with the concentric action, which allows for greater loading during the eccentric action, i. LÄS MER

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

    Författare :Lina Wramner; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DMF; simulations; heavy-duty truck; resonances; driveline; dual mass flywheel; powertrain; torsional vibrations; friction;

    Sammanfattning : 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. LÄS MER