Proceedings Of The Fisita 2012 World Automotive Congress Volume 7 Vehicle Design And Testing I Lecture Notes In Electrical Engineering -

flywheel energy storage wikipedia - flywheel energy storage fes works by accelerating a rotor to a very high speed and maintaining the energy in the system as rotational energy when energy is extracted from the system the flywheel s rotational speed is reduced as a consequence of the principle of conservation of energy adding energy to the system correspondingly results in an increase in the speed of the flywheel