Electromagnetic and Rotational Characteristics of a Superconducting Flywheel Energy Storage System Utilizing a Radial-Type High-Temperature Superconducting Bearing
Journal Article
·
· Journal of Superconductivity and Novel Magnetism
- Shijiazhuang Tiedao University (China)
- Chinese Academy of Sciences, Institute of Electrical Engineering (China)
A 2 kW/28.5 kJ superconducting flywheel energy storage system (SFESS) with a radial-type high-temperature superconducting (HTS) bearing was set up to study the electromagnetic and rotational characteristics. The structure of the SFESS as well as the design of its main parts was reported. A mathematical model based on the finite element method (FEM) was established to research the electromagnetic characteristics of the HTS bearing during the levitation process, which show that a part of the magnetic flux penetrates into the edge of the HTS bulks and then goes back to the opposite pole of the permanent magnet rotor (PMR). The induced current mainly distributes in the edge of the HTS bulks, indicating that larger force acts on the edge part of the HTS bulks and probably causes them to crack. The free rotations of the rotor at different steady-state speeds of 2500–5000 rpm and its radial vibration were displayed. The induced voltage of the stator winding of the motor in this process was analyzed. The rotational characteristics are related to the vibration of the rotor. Below the resonant frequency, the vibration increases significantly with the speed. Enhancing the radial stiffness to limit the vibration amplitude of the rotor is an effective approach to improve the speed.
- OSTI ID:
- 22921232
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 6 Vol. 32; ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
Similar Records
Damping in high-temperature superconducting levitation systems
Transient heat transfer analysis of superconducting magnetic levitating flywheel rotor operating in vacuum
Hybrid superconducting magnetic bearing and its frictional energy loss and dynamics
Patent
·
Mon Dec 14 23:00:00 EST 2009
·
OSTI ID:1176201
Transient heat transfer analysis of superconducting magnetic levitating flywheel rotor operating in vacuum
Conference
·
Thu Jul 01 00:00:00 EDT 1999
·
OSTI ID:20006914
Hybrid superconducting magnetic bearing and its frictional energy loss and dynamics
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:390767