| 摘要 |
The invention relates to apparatus for orienting a magnetic object in free space with the aid of magnetic levitation, the apparatus comprising a magnet array comprising one or more magnets and arranged in a circle around an imaginary axis, which magnet array generates a static magnetic field with an equilibrium location in this field at which the magnetic object can be maintained; sensor means for detecting location deviations between the current location of the magnetic object and the equilibrium location and, based on the result of the detection operation, for generating and delivering control signals; a coil array comprised of various controllable coils, the coil array generating a controllable magnetic field for maintaining the magnetic object at the equilibrium location, each coil of the coil array being arranged at least partly outside the circle in radial direction from the imaginary axis. The apparatus is characterized in that the magnetic polarisation of the magnetic object is opposite to that of the magnetic array. As a result, the magnetic object can be maintained more stably at an equilibrium location by means of magnetic levitation, while the correction coils oriented to the exterior can exert a large correction force on the magnetic object so as to maintain the object at its equilibrium location. |
