Flywheel energy storage works by accelerating a rotor flywheel 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.YouTuber engineer Tom Stanton has come up with a way to cheaply build a small flywheel that uses magnets around its shaft to levitate with only air resistance to overcome.Watch the video from Tom Stanton for more info:
With the mechanics of the flywheel figured out, Stanton moved onto a design for an energy-extracting circuit that would transform the rotational inertia of the disk into electrical energy.
The flywheel itself is just a heavy aluminum disc on a shaft, with a pair of bearings on each side made of stacks of neodymium magnets.Tom’s next step was to harness some of the flywheel’s angular momentum to make electricity./Tom Stanton