Stator for rotating electric machine

A stator for a rotating electric machine comprising a rotor having a plurality of magnetic poles formed on a periphery thereof radially facing the stator, and the polarities of the magnetic poles alternate between north and south in the circumferential direction of the rotor, a rotor pole pitch being defined by adjacent north and south poles in the circumferential direction, the stator comprising:

• an annular stator core having a plurality of teeth and a plurality of slots formed therein, the teeth being spaced from one another in a circumferential direction of the stator core, each of the slots being formed between one circumferentially-adjacent pair of the teeth;
• and
• a plurality of winding groups mounted on the teeth of the stator core, each of the winding groups belonging to one of a plurality of phases,
• wherein
• each of the winding groups is either a short-pitch winding group or a full-pitch winding group which consists of windings wound at a pitch equal to 180° in electrical angle and the same as the rotor pole pitch,
• the winding groups include at least one short-pitch winding group pair which consists of two short-pitch winding groups that respectively belong to two different phases and are circumferentially adjacent to each other,
• the two short-pitch winding groups are arranged so as not to overlap each other in a radial direction of the stator core,
• there are no other winding groups interposed between the two short-pitch winding groups in the circumferential direction of the stator core,
• the stator core is formed by bending a flat band-shaped stator core into the annular shape, and
• the winding groups include at least one circumferentially-adjacent pair of winding groups that respectively belong to two different phases and overlap each other in a radial direction of the stator core.