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:
Jun. 16, 1998
Filed:
Jul. 26, 1996
Vijay Gondhalekar, New York, NY (US);
SatCon Technology Corp., Cambridge, MA (US);
Abstract
A homopolar radial magnetic bearing includes a single bias coil common to a plurality of pole pieces equi-angular spaced from each other, a plurality of control coils, one control coil being disposed at each pole piece and a rotor being secured to the rotating member. The bias coil and each of the control coils cooperate with each pole piece so as to establish a homopolar magnetic field for rotatably supporting a rotating member. The bias coil is circumferentially disposed about the rotating member and passes through an inside area at one end of each pole piece. A control coil is wrapped around the other end of each pole. In operation, the bias coil establishes a steady state electromagnetic field to suspend the rotating member when it is energized. Each of the control coils are configured so as to be selectively and individually energized to establish another magnetic field that is superimposed on the steady state magnetic field to yield a net magnetic field that suspends and centers the rotating member. Preferably there are an even number of pole pieces and control coils, so that pairs of pole pieces are in a diametrically opposed relation.