A Prototype of Flywheel Energy Storage System Suspended by Active Magnetic Bearings with PID controller

In this paper, a prototype miniature of flywheel energy storage system is developed. The structure and dynamics characteristic of the flywheel energy storage system are discussed. The system consists of a disk-shaped rotor, active magnetic bearing (AMB), PED controller, displacement sensor and cabinet, etc. The rotor is suspended by three active magnetic bearings (AMB). A mathematical model of the system is deduced and each degree of freedom motion is treated separately for the control system. PID control is applied to the AMB. The experiments have been carried out to measure the dynamic response of the rotor to direct disturbance. The results indicate that the PID controller possesses good performance.