| 摘要 |
An outward turning motor rotor for a ceiling fan includes a stator and a rotor positioned around the outer circumference of the stator. The rotor contains a circular-case base having its circumference disposed with a circumferential wall having plural permanent magnets equidistantly and annularly secured thereon. Each permanent magnet has one side facing the stator tapered gradually from an intermediate portion toward a left end and a right end, letting the opposite ends of each permanent magnet respectively formed with a comparatively thin pole portion and lengthening a distance between the pole portions of each permanent magnet and the stator. In change-over motion, a comparatively small magnetic force produced by the pole portions of the rotor will stabilize vibration produced, greatly lowering noises caused by rotation of the rotor.
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