300kw magnetic levitation energy storage flywheel

What is a compact and highly efficient flywheel energy storage system?

Abstract: This article proposed a compact and highly efficient flywheel energy storage system. Single coreless stator and double rotor structures are used to eliminate the idling loss caused by the flux of permanent magnetic machines. A novel compact magnetic bearing is proposed to eliminate the friction loss during high-speed operation.

What is a flywheel energy storage system (fess)?

With the advances in high strength and light weight composite material, high performance magnetic bearings, and power electronics technology in recent years, Flywheel Energy Storage Systems (FESSs) constitute a viable alternative to traditional battery storage systems , , .

What is the world's largest-class flywheel power storage system?

The completed system is the world's largest-class flywheel power storage system using a superconducting magnetic bearing. It has 300-kW output capability and 100-kWh storage capacity, and contains a CFRP (carbon-fiber-reinforced-plastic) flywheel.

How does a flywheel energy storage system work?

A flywheel energy storage system (FESS) uses a high speed spinning mass (rotor) to store kinetic energy. The energy is input or output by a dual-direction motor/generator. To maintain it in a high efficiency, the flywheel works within a vacuum chamber.

What are the alternative bearings for flywheel energy storage systems?

Active magnetic bearings and passive magnetic bearings are the alternative bearings for flywheel energy storage systems , . Active magnetic bearing has advantages such as simple construction and capability of supporting large loads, but the complexity of the control system is daunting.

How does a flywheel work?

In this system, the flywheel is levitated by the superconducting magnetic bearing without contact. Therefore, the power loss is minimal although a large flywheel is used, and it is a very practical system which enables stable power generation over a long period.