Patent ID: 8441165

Claim:
A motor for a compressor, comprising: a stator provided with a yoke portion formed in an annular shape to configure a passage through which magnetism flows, a plurality of tooth portions that protrudes from an inner circumferential surface of the yoke portion toward a center thereof by a certain length in a circumferential direction, and a plurality of slot portions recessed between the tooth portions as deep as configuring a certain sectional area in a circumferential direction; a plurality of coils wound on the plurality of slot portions and the plurality of tooth portions of the stator, at least some of the plurality of coils being formed of aluminum; a rotor inserted in the stator with a certain gap therebetween and having conductors therein which are rotated by an electromagnetic induction of the plurality of coils; and a rotational shaft press-fitted in a center of the rotor to transfer a rotational force to a compression device, wherein an area of an open side of each slot portion is not smaller than at least a diameter of the coil, and wherein a ratio d/A of the diameter d of the coil to the area A of the open side of the slot portion is: more than approximately 0.29 for 20 slot portions; more than approximately 0.24 for 24 slot portions; and more than approximately 0.25 for 28 slot portions.