Characteristics of High-Temperature Superconducting Levitation System Dependent on Magnetic Circuit Configuration
Iwanori Murakami, Kenta Shibasaki, Takato Oide, Syunsuke AkuzawaBackground
Superconducting magnetic bearings (SMBs) using high-temperature superconductors (HTS) offer omnidirectional stability without control, but face issues with HTS bulk material and cooling costs.
Objective
This study investigates whether the restoring force can be enhanced using the same HTS by controlling the magnetic flux penetrating the HTS and hybridizing it with a passive magnetic bearing (PMB).
Methods
Permanent magnets (PM) were placed in the stator section of the SMB. The radial and axial characteristics were analyzed when forming a PMB with part of the levitated rotor. Changes in restoring force characteristics and vibration characteristics were investigated.
Results
An improvement in radial restoring force was confirmed. Although axial restoring force decreased, the HTS pinning characteristics were found to suppress this reduction. An increase in damping force was also observed in dynamic characteristics.
Conclusions
These results demonstrate the usefulness of hybrid magnetic bearings combining annular permanent magnets and superconductors.
Note
This study does not contain any studies with human or animal subjects performed by any of the authors.