Patent ID: 6118199
Filing Date: 2000-09-12
Classification: F16C,Y02B

Abstract:
A magnetic bearing, operating in accordance with the electric-dynamic repulsion principle, for the magnetic suspension of a rotor (20, 30) in rotational movement relative to an outer first stator (24,34) and an inner second stator (26,36), respectively, about a central axis (23,33) of said first and second stators, comprising:a rotor having a tubular rotational body (21, 31) made from an electrically conductive and non-magnetic material;an annular, rotation symmetric first magnet (22,32) arranged on the outer first stator (24, 34);an annular, rotation symmetric second magnet (25, 35) arranged on the inner second stator (26, 36), the first and second magnets being arranged in a common plane, concentrically about said central axis, forming a slit between the first and second magnets where the tubular rotational body is allowed to rotate;the dipoles of the first magnet being equally directed about the whole periphery of the first magnet, and the dipoles of the second magnet being equally directed about the whole periphery of the second magnet, anda rotation symmetric magnet field being provided concentrically about the central axis, so that eddy currents are induced in the rotational body of said electrically conductive and non-magnetic material only when said rotational body (21, 31) tends to rotate eccentrically about said central axis of the first and second stators.