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:
Aug. 23, 2005
Filed:
May. 17, 2002
Hideki Kanebako, Nagano, JP;
Hideki Kanebako, Nagano, JP;
Kabushiki Kaisha Sankyo Seiki Seisakusho, Nagano, JP;
Abstract
A magnetic levitation motor which rotates a rotor in a levitated state with respect to a stator by a direct-current magnetic field and stator windings. The magnetic levitation motor comprises: a direct-current magnetic field generating device () which forms a magnetic flux having a radial pattern with an axis at the center in a stator () and a rotor (); a first stator winding () for generating a levitation control magnetic flux () to control levitation of the rotor () in a radial direction; and a second stator winding () for generating a rotating magnetic field to rotate the rotor (). The rotor () is provided with a yoke portion () and a motor magnet () which are opposed to a stator core () of the stator (). A part of a bias magnetic flux () and a part of a levitation control magnetic flux () form a magnetic circuit directly reaching the stator core from the yoke, thereby increasing a levitation force of the rotor.