Patent ID: 6737786
Filing Date: 2004-05-18
Classification: H02K

Abstract:
A wheel drum structure of an inner stator with inbuilt switches, comprising:an inner stator portion with a hollow space formed at an inner ring portion end thereof, said inner stator portion having also wire grooves for receiving a plurality of sets of stator coils; two stator ring portion end cover plates covering upper and lower end faces of said inner stator ring portion end, said two end cover plates corresponding to the same center of an outer rotor portion and said inner stator portion to form a concentric positioning end; a plurality of switches soldered and fixed on a switch circuit board, said switch circuit board being fixed beside said stator ring portion end cover plates; a wheel drum supporting shaft pressed and joined at said concentric positioning end of said end cover plates, said supporting shaft being provided with at least more than one through holes, instructions for switching stator coil windings and said switches being transferred from an external control system via said through holes; and an outer rotor portion including outer rotor magnets and a magnet iron yoke ring, said outer rotor portion corresponding to said inner stator portion so that an armature can react to rotate and output torque.