| 摘要 |
PURPOSE: A motor having a magnetic bearing is provided to accomplish the high speed rotation of the motor by using the magnet bearing instead of a rotor shaft bearing. CONSTITUTION: A holder(15) is provided in a motor case(14) so that a doughnut type permanent magnet(11) is inserted and firmly attached. Recesses(16) to which permanent magnets can be attached are provided in a rotor shaft(13). The diameter of the rotor shaft(13) between the recesses(16) is larger than the inner diameter of the doughnut type permanent magnet(11), or a circular clip spring is installed at the rotor shaft(13) to prevent the separation of the rotor shaft(13) due to a sudden impact generated in the motor.
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