How to remove the rotor shaft of the flywheel energy storage device

What is a flywheel rotor?

Flywheel rotors are a key component, determining not only the energy content of the entire flywheel energy storage system (FESS), but also system costs, housing design, bearing system, etc. Using simple analytic formulas, the basics of FESS rotor design and material selection are presented.

What is the operational mechanism of a flywheel?

The operational mechanism of a flywheel has two states: energy storage and energy release. Energy is stored in a flywheel when torque is applied to it. The torque increases the rotational speed of the flywheel; as a result, energy is stored. Conversely, the energy is released in the form of torque to the connected mechanical device .

How does a Flywheel energy storage system work?

A flywheel energy storage system works by applying a torque in the direction of rotation to speed up the rotor, and applying a torque in the reverse direction to slow it down. On one level, it is simple to implement and understand in comparison with many other energy storage methods, and can store and release energy for potentially unlimited cycles.

How kinetic energy is stored in a flywheel?

In this storage scheme, kinetic energy is stored by spinning a disk or rotor about its axis. Amount of energy stored in disk or rotor is directly proportional to the square of the wheel speed and rotor׳s mass moment of inertia. Whenever power is required, flywheel uses the rotor inertia and converts stored kinetic energy into electricity .

How does a flywheel work?

When energy needs to be released, the flywheel reverses the generator and transforms the stored mechanical energy into electrical energy. The frequency and voltage of the output electric energy are controlled by an electrical electronic device to meet the requirements .

How much power does a flywheel rotor have?

FES system in a high-performance hybrid automobile (courtesy of Dr. Ing. h.c. F. Porsche AG, Stuttgart, Germany) flywheel rotor is able to reach top speeds around 60,000 rpm. The energy storage and power capacity of the shown unit with mass of 25 kg is 400 kJ and 60 kW respectively.