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:
Nov. 14, 2000
Filed:
Oct. 06, 1999
Applicant:
Inventors:
Hirochika Ueyama, Hirakata, JP;
Atsushi Kubo, Matsubara, JP;
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 905 ; 318721 ;
Abstract
In the magnetic bearing apparatus, there is provided a current sensor for detecting a current flowing in a motor. When the current increases over a reference value, a DSP enhances a support stiffness of the magnetic bearing, thereby securing a stable rotation of the rotor.