| 摘要 |
PURPOSE:To drive the disc without direct coupling to motor, by opposing the pole surface of permanent magnet at the circumference of the Al disc embodied with the turn table, and developing the torque to the Al disc with the magnetic flux from the permanent magnet turned with the revolution of the drive motor and the eddy current induced on the Al disc. CONSTITUTION:The motor 2 is fixed to the chassis 1, the turn table 3 is supported movably via the rotary shaft 3a and the bearings 4a, 4b, and the Al disc is fitted unifiedly. To the rotary shaft of the motor 2, the permanent magnets 6a, 6b are fitted with the coupling 7 together with the flanges 5a, 5b by clipping the spacer 8, to fastening the Al disc 11. When the motor 2 turns, since the magnetic flux of the permanent magnets 6a, 6b is interlinked with the Al disc 11, eddy current is induced on the disc 11 to produce a torque to the disc 11, and the turn table 3 is turned accompanied with it. Since no vibration of the motor 2 is delivered to the turn table 3, stable revolution can be obtained. |
