| 摘要 |
A passive magnetic bearing structure for radially supporting a rotor with respect to a stator is provided, in which a magnetic circuit is mounted on the rotor or stator for generating two strongly different axial magnetic fields in two concentric angular gaps coaxial to the rotation axis and radially spaced from one another. At least three shortened superconducting turns are mounted on the stator circumferentially around the rotation axis so that under any tolerable shift of the rotor, one edge of every turn will be placed in one annular gap comprising magnetic field, and the radially opposite edge will be placed in the other gap. The invention is also directed to a linear magnetic bearing structure for restricting unwanted movement of a slider, comprising the slider, a guideway, and a magnetic circuit mounted on the slider or guideway for generating two strongly different magnetic fields perpendicular to the movement direction, in two different layers lengthened in the sliding direction and spaced from one another in the direction normal to both the sliding and magnetic field directions. A shortened superconducting turn is mounted on the slider or guideway so that any tolerable shift of the slider, one edge of every turn will be placed in one layer comprising magnetic field, and the radially opposite edge will be placed in the other layer.
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