Patent ID: 7064470

Claim:
A three-phase motor having a stator formed by sequentially inserting winding coils of three phases of U-phase, V-phase and W-phase into slots provided on an inner circumferential surface of a stator core, wherein the winding coil of each phase is formed by connecting plural unipolar coils formed by winding electric wires in plural turns, and each of the unipolar coils includes a pair of insertion parts to be inserted into the slots and a pair of coil end parts connecting the pair of insertion parts, and the winding coils of the three phases have the relationships of Cv/Cu <1.0 and Cw/Cv <1.0, where Cu represents an average length of the electric wires forming the coil end parts of each of the unipolar coils in the winding coil of U-phase, Cv represents an average length of the electric wires forming the coil end parts of each of the unipolar coils in the winding coil of V-phase, and Cw represents an average length of the electric wires forming the coil end parts of each of the unipolar coils in the winding coil of W-phase.