Flywheel energy storage pole pair number

Flywheel energy storage systems (FESSs) store mechanical energy in a rotating flywheel that convert into electrical energy by means of an electrical machine and vice versa the electrical machine which drives the flywheel transforms the electrical energy into mechanical energy. Fig. 1 shows a diagram for the components that form a modern FESS.

The flywheel module, shown in Fig. 1, is designed to store a total of 1.25 kWh at 36,000 rpm and deliver 160kW (200 kVA) for more than 18 seconds, or 300kw for 5 seconds. In many flywheel designs that have been suggested, the goal of maximizing energy density has lead to carbon fiber composites as the material choice for the flywheel hub.

The flywheel was developed for a number of industrial applications to provide: 1) ride-through power in turbine or diesel generator sets, 2) voltage support in rail applications, 3) energy recovery in crane applications, 4) power quality improvement, and 5) load support in uninterruptible power supplies (UPS).

In this way, the kinetic energy is converted back into electrical energy, and the flying wheel acts as a mechanical battery. Often, the mass used in the flywheel is shaped like a hollow cylinder . Fig. 6 shows the configuration of the prototype FES using a conventional induction motor and ball bearings. ... ...

shape factor of the rotor should be near or equal to the value one . and for 1 kg mass. The optimal material for the flywheel rotor is the composite speed value . mechanical bearing. The second system is the high-speed flywheel system up to and as a generator when discharging. - Flywheel rotor which stores the kinetic energy.

As more energy is imparted into a flywheel it speeds up as it stores more energy and slows down when it loses the said energy, . Although, the existing lithium-ion battery has a high energy density but high cost in term of power capacity and less power density. ...