Multi-phase outer-rotor-type variable frequency induction motor for a ceiling fan

A multi-phase outer-rotor-type variable frequency induction motor for a ceiling fan, comprising:

• a housing disposed to surround an axis, and including a plurality of blade-mounting parts disposed at angularly spaced apart positions with respect to the axis;
• an outer rotor disposed in said housing, and including a stator-mounting part extending along the axis, and an outer rotor body surrounding said stator-mounting part and combined with said housing, said outer rotor body being formed with a plurality of slots that surround said stator-mounting part and that are disposed at angularly spaced apart positions with respect to the axis, and including a plurality of conductive elements respectively disposed in said slots;
• a stator disposed in said stator-mounting part, and including a central shaft extending along the axis and pivotally connected to said housing, a stator core extending in radial directions from said central shaft, and a winding set, said stator core being formed with a plurality of winding slots that are disposed at angularly spaced apart positions with respect to the axis, said winding set being disposed to wind in said winding slots and being configured into a multi-phase winding arrangement;
• and
• a control unit connected electrically to said winding set of said stator and operable to control frequency of a power signal fed by said control unit to said winding set.