Abstract
This paper presents a small-sized flywheel energy storage system that uses ahigh-temperature superconductor (HTS) bearing characterized by a non-contacting bearingwith no active control. The small-sized flywheel is made up several magnets for amotor/generator as well as an HTS bearing, and they are fitted into a 34 mm diameter,3 mm thick aluminium disc. For simplicity and miniaturization of the whole system, thesmall-sized flywheel takes torque directly from a planar stator, which consists of an axialflux-type brushless DC motor/generator.The small-sized flywheel successfully rotated up to 38 000 rpm in a vacuum while levitatedabove the stator with a gap of about 1 mm. However, there are some eddy current losses inthe stator and non-axisymmetry in the magnetic field causing large drag torque. In order tosolve these problems, an improved magnet array in the flywheel, including magneticscreening, is proposed and 3D electromagnetic simulations have been conducted.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
