Hybrid superconducting magnetic bearing and its frictional energy loss and dynamics

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:390767

Xia, Z; Ma, K B; Chen, Q Y; Cooley, R R ^[1]

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1. Univ. of Houston, TX (United States); and others

A hybrid superconducting magnetic bearing (SMB) has been designed and tested. A flywheel energy storage (FES) prototype has been constructed for testing bearing friction loss and characterizing the dynamics of the rotor. The hybrid SMB design uses magnetic forces from permanent magnets for levitation and high temperature superconductor YBCO in between the magnets for stabilization. A 42 lb. flywheel currently can rotate up to 6,000 RPM with kinetic energy of 8 Wh stored. The result from the recent rotor spin-down experiment indicates an average frictional energy loss <2% per hour in a vacuum of 10 {sup {minus}5} torr, with imperfect system alignment and balance of rotor. The system dynamics has been conducted to improve upon the energy loss and rotor-bearing modeling.

• OSTI ID: 390767
• Report Number(s): CONF-950852--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
66 PHYSICS
DESIGN
ENERGY LOSSES
FRICTION
HIGH-TC SUPERCONDUCTORS
HYBRID SYSTEMS
MAGNETIC BEARINGS
ROTORS
SUPERCONDUCTING MAGNETS