Affiliations: [a] Department of Mechanical System Engineering, Gunma
University, Kiryu, Japan
Correspondence:
[*]
Corresponding author: Iwanori Murakami, Department of Mechanical
System Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, 376-8515, Japan.
Tel.: +81 0277 30 1564; E-mail: [email protected]
Abstract: In this study, we propose a new magnetic levitation synchronous
motor with a high-Tc superconducting bearing. The levitation rotor obtains the
levitation force by the magnetic attraction and the restoring force (axially
and radially to the shaft) from a superconducting bearing. The levitation rotor
to which the magnetic flux concentration method is applied has a large magnetic
field outside of the rotor. Because the superconducting bearing constrains this
concentrated magnetic flux, the rotor obtains a large restoring force. In
addition, a superconducting bearing with a small bulk can be realized. We
stabilized the rotor using this method and confirmed that this motor passed the
resonance and that its speed increased to approximately 3500 [rpm] without
control.
Keywords: Synchronous motor, magnetic levitation, superconducting bearing
