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:
Dec. 05, 1989
Filed:
Jun. 14, 1988
Applicant:
Inventors:
Hirokuni Hiyama, Tokyo, JP;
Katsuhide Watanabe, Kawasaki, JP;
Atsushi Nakajima, Koganei, JP;
Chikara Murakami, Hachioji, JP;
Assignees:
National Aerospace Laboratory, Tokyo, JP;
Ebara Research Co., Ltd., Fujisawa, JP;
Ebara Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
310 905 ; 324207 ;
Abstract
An active type magnetic bearing system includes magnetic bearings for suspending a rotary body to permit it to rotate about its rotational axis. A control system supplies the magnetic bearings with signals to control the radial position of the rotary body, and comprises displacement detecting circuits for detecting any displacement of the radial position of the rotary body and a control circuit for producing a control signal which serves to suppress any unstable vibration of the rotary body.