Energy storage flywheels are useful in power conditioning applications, i.e. when there is a mismatch between the power generated and the power required by the load. The use of a flywheel in a hybrid vehicle, for example, permits the engine to be designed to provide only the power needed to overcome steady-state losses and not have the inefficiencies that result when the engine must also provide power for maximum acceleration. While power management has provided the opportunities for flywheel batteries in vehicles, advances in technology have made the systems more practical. Very high strength, long-life composites have significantly improved the energy density in the system by permitting much higher rotational velocities. So, smaller, lighter wheels can store energy in the range from less than a kWh to more than 100 kWh. Other important advances have been in magnetic bearings that allow reliable high-speed operation and in power electronics to control the output power. Vehicular operation does produce new issues that were less significant in the more traditional stationary applications. One of the most obvious among these is torque management. In charging or discharging a flywheel, the rotational velocity is changed and a torque is produced. For example, systems intended for the International Space Station, where torque management is critical, the initial plan is to cancel torque by using two counter-rotating flywheels. Once confidence is gained in this mode of operation, energy will be distributed among various flywheels to produce the net torque needed for stable operation. For terrestrial vehicles, the flywheel is in a gimbled compliant mount with the axis of rotation orthogonal to the plane of vehicle motion. This orientation permits torque to be compensated by the magnetic bearings and the mount. Tests show that the mount and bearing system can accommodate the shock and vibrations, as well as traveling up or down grades, expected under on-road operation.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Flywheel batteries for vehicles


    Weitere Titelangaben:

    Schwungradbatterien für Fahrzeuge


    Beteiligte:
    Beno, J. (Autor:in) / Thompson, R. (Autor:in) / Hebner, R. (Autor:in)


    Erscheinungsdatum :

    2002


    Format / Umfang :

    3 Seiten, 1 Tabelle, 2 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Flywheel for Vehicles

    G. Waagepetersen | NTIS | 1989


    Flywheel assemblies and vehicles including same

    WHINNERY JOSEPH P W | Europäisches Patentamt | 2015

    Freier Zugriff

    A Flywheel Energy Store for Road Vehicles

    Acarnley, P. / Mecrow, B. / Kelly, J. et al. | British Library Conference Proceedings | 1997


    A flywheel energy store for road vehicles

    Acarnley,P. / Mexrow,B. / Kelly,J. et al. | Kraftfahrwesen | 1997


    Hybrid Flywheel Propulsion System for Rail Vehicles

    Jefferson, C. M. / Ackerman, M. / Coveney, V. A. et al. | British Library Conference Proceedings | 1994