| 摘要 |
A hybrid magnetic bearing excellent in controllability in which higher rigidity, higher efficiency, and reduction in size can be achieved. In the hybrid magnetic bearing having a rotor rotating while being supported under noncontact state by controlling magnetic force of a plurality of electromagnets and permanent magnets, the electromagnet is formed by winding a control coil around cores in each of which a main pole and a commutating pole provided with a permanent magnet for commutating pole are allowed to project in the radial or axial direction of the rotor substantially in parallel at a predetermined interval. With regard to a magnetic bearing in the radial direction, two electromagnets are arranged oppositely and substantially horizontally while holding the rotor between them, the rotor and the main and commutating poles are arranged to have a predetermined gap, and a permanent magnet is provided between the main poles of adjacent electromagnets. With regard to a magnetic bearing in the axial direction, two electromagnets are arranged in parallel and substantially horizontally, the rotor and the main and commutating poles are arranged to have a predetermined gap, and a permanent magnet is provided between the main poles of adjacent electromagnets.
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