Rotor

Energy storage flywheel rotor support structure

A typical system consists of a flywheel supported by rolling-element bearing connected to a motor–generator. . Flywheel energy storage (FES) works by spinning a rotor (flywheel) 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. . This chapter mainly introduces the main structure of the flywheel energy storage system, the electromechanical control system, and the charging and discharging control process [62]. Therefore, it can store energy at high efficiency over a long duration.