| 摘要 |
PURPOSE:To apply a brake to a rotor without contact by moving a permanent magnet secured near the rotor having a conductor in the rotational shaft direction of the rotor. CONSTITUTION:A ring-shaped conductive electromagnetic soft iron ring 5' is engaged integrally with a collar 5a of a flywheel 5. A disc-shaped electromagnetic soft iron plate 8 is provided at an ultrafine gap from the wheel 5, permanent magnets 11 are provided on the circumference of the plate 8, and an electromagnetic soft iron plate 7 is provided on the magnets 11. When the ring 5' is rotated, an eddy current is generated with respect to the intensity of a magnetic field and the rotating speed of the wheel 5, and a brake torque for stopping the wheel 5 is generated. To provide variable brake torque, the plate 8 is displaced axially of a shaft 10. |
