Patent ID: 9080606
Filing Date: 2015-07-14
Classification: A61B,F16C,H02K

Abstract:
1. A device to support and drive a rotatable part of a gantry of a computed tomography apparatus relative to a stationary part of said gantry, said gantry comprising a system axis and said rotatable part and said stationary part having an annular gap therebetween that proceeds around said system axis, said device comprising: a magnetic radial bearing configured to magnetically support said rotatable part of said gantry radially with respect to said system axis, relative to said stationary part of said gantry; an electromagnetic drive configured to rotate said rotatable part of said gantry around said system axis relative to said stationary part of said gantry; a plurality of magnetic components, said plurality extending completely around said system axis in said annular gap, with all of said magnetic components situated in a plane that is perpendicular to said system axis; said magnetic radial bearing comprising a first sub-plurality of said plurality of magnetic components and said electromagnetic drive comprising a second sub-plurality of said plurality of magnetic components, with no magnetic component in said plurality of magnetic components being in both said first sub-plurality and in said second sub-plurality; and the magnetic components in said first sub-plurality alternating around said annular gap in said plane with the magnetic components in said second sub-plurality.