The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2004
Filed:
Feb. 20, 2003
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A magnetic repulsion-actuated magnetic bearing is constructed to include a stator, two magnetic repulsion modules mounted inside the stator, a rotor having two annular permanent magnets at the ends corresponding to the two magnetic repulsion modules. A magnetic force of repulsion is produced between equiangularly spaced permanent magnets of the magnetic repulsion modules and the annular permanent magnets of the rotor to keep the rotor radially in position automatically upon power failure. A controller is electrically connected to windings of the magnetic repulsion modules for controlling the current of the windings to change the intensity of magnetic force so as to further control the radial magnetic force of repulsion of the magnetic repulsion actuators, keeping the radial bearing stiffness during rotation of the rotor.