Patent ID: 6664665
Filing Date: 2003-12-16
Classification: H02K

Abstract:
A coreless type linear motor comprising a rotor and a stator, wherein said stator comprises a pair of parallel stator guide plates made of ferromagnetic material and a plurality of permanent magnets on each of said stator guide plates;wherein said rotor comprises a bottom cover, an upper cover secured to the bottom cover, and a plurality of coils, said bottom cover, said upper cover and said coils extending between said pair of guide plates, and said permanent magnets on said guide plates facing said upper cover; wherein a plurality coil troughs are set in said upper cover, said coils being buried in said coil troughs, said coils being made by winding conductive wires, and a plurality of heat holes being formed in said upper cover at locations adjacent respective centers of said coils, said heat holes communicating with an outside of said bottom cover to cause heat from said coils to be transmitted into air through said heat holes.