| 摘要 |
PURPOSE:To simplify the composition of a device and minaturize it and increase torque, by fixing an external rotor in the internal section of a cylindrical rotor hub, and by supporting the rotor hub with a cantilever bearing. CONSTITUTION:Outside an internal stator 1, via a slight void, an external rotor 2 is set. The external rotor 2 is fixed in the internal section of a cylindrical rotor hub 3, and is rotatably supported with cantilever construction by a bearing 5 set in the cylindrical internal section, via the rotor hub 3. The external rotor 2 is directly driven and rotated by magnetic induction generated on the internal stator 1. Besides, by selecting the diameter D of the bearing 5 to be made larger than the maximum-axis-directional length H of a load system, natural frequency is heightened.
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