Design of superconducting magnetic bearings with high levitating force for flywheel energy storage systems

Abstract

AbsiracCHybrid superconducting magnetic bearing(SMB), using YBCO high temperature superconductors(€ITS) coupled with permanent magnets, has been implemented into a flywheel energy storage(FES) system prototype. The hybrid S M B design uses permanent magnets to levitate the rotor weighing 19 kg and superconductors to stabilize the inherently unstable magnet-magnet interactions. The SMB bearings are brought into action under convenient field-cooled conditions. Spin-down performance of the constructed FES prototype was tested under a moderate vacuum.

Optimization of energy conversion in monolithic superconducting magnets

“…Perhaps the most straightforward is use as magnetic bearings [1], [2]. Another application is as an armature in rotating machines, such as synchronous or switched reluctance motors [3], [4].…”

A state-feedback control approach via inertial delay observer for Magnetic Levitation system

“…The world wide known example of this system is high speed MAGLEV train [1]. Furthermore magnetic levitation also has various engineering applications in mag netic bearing [2], flywheel [3], artificial heart [4] and many more. The MAGLEV technology offers many advantages like high frequency, high speed, low maintenance [5].…”

Newly developed millimeter-sized superconducting linear actuator with superconducting slider

“…Superconducting levitation systems do not need any additional control mechanisms like controllers and power amplifiers and have little energy loss for operating the system. Thus, there are many applications of superconductors to produce levitation force or driving force [8]- [10]. However, there are few superconducting applications that use superconductors to produce both levitation force and driving force.…”