Abstract
As a clean energy storage method with high energy density, flywheel energy storage (FES) rekindles wide range interests among researchers. Since the rapid development of material science and power electronics, great progress has been made in FES technology. Material used to fabricate the flywheel rotor has switched from stone, stainless-steel to the latest composite material. With the introduction of magnetic bearing and high-efficient motor/generator, FES becomes a powerful competitor to chemical battery and develops wider application fields. This paper describes the latest developments and design considerations of FES technology. Rotor, bearing suspension system, motor/generator are the key parts of a FES system. And main factors like total energy losses, safety, cost control are discussed. Finally, application area of FES technology is presented including energy storage and attitude control in satellite, high-power uninterrupted power supply (UPS), electric vehicle (EV), power quality problem.
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