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. 05, 1996
Filed:
Dec. 21, 1994
Joseph F Pinkerton, Austin, TX (US);
Magnetic Bearing Technologies, Inc., Austin, TX (US);
Abstract
An active magnetic bearing utilizing a brushless generator which provides electrical energy to the bearing is disclosed. The use of a brushless generator reduces the size, volume, complexity and cost requirements of the total magnetic bearing system. In the preferred embodiments, the brushless generator provides increased output by utilizing air-core coils in place of ferrous coils in regions of the generator which operate at high frequencies. The air-core coils enable the generator to rotate at speeds in excess of 24,000 rpm while continuing to operate efficiently because core losses, due to the use of traditional iron cores (e.g., hysteresis and eddy-currents), are virtually eliminated. Both radial and axial bearings are provided, as well as a method for maintaining magnetic levitation of a rotating member.