| 摘要 |
PURPOSE:To make the device in the caption compact and light by forming the magnetic pole surfaces of radial control electromagnets into taper shape, and generating suction forces in the radial and axial directions with the same electromagnet. CONSTITUTION:The magnetic pole surfaces of radial control electromagnets 3a-3d are processed into taper forms, and the outer circumferential surface of annular portions on the rotor side facing to the above-mentioned magnetic pole surfaces are formed into cones corresponding to the taper forms. The signals of radial displacement gages 5a, 5b supply current to the electromagnets 3a-3d through control circuits 9a-9d respectively. The magnetic pole surface of the electromagnets are inclined and as well the circular portions on the rotor side facing to the above-mentioned magnetic pole surfaces have suitable forms and thereby generated suction forces are compensated with each other in the radial direction so that only restoring force in the vertical direction can be obtained. Accordingly, without any axial control electromagnet, it is possible to correct the axial displacement so as to make the rotor floatable, and then a compact and light magnetic bearing device can be secured.
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