Rotary electric machine

1. A rotary electric machine comprising:

a rotor that is rotatably supported by a housing; and

a stator comprising:

a stator core in which slots are formed at a ratio of two slots per phase per pole; and

a first three-phase stator winding and a second three-phase stator winding that are mounted into said stator core,

said stator being supported by said housing so as to surround said rotor,

wherein:

said first three-phase stator winding is configured by wye-connecting a U 1 -phase winding, a V 1 -phase winding, and a W 1 -phase winding;

said second three-phase stator winding is configured by wye-connecting a U 2 -phase winding, a V 2 -phase winding, and a W 2 -phase winding;

said U 1 -phase winding is configured by connecting a U 1-1 -phase winding portion and a U 1-2 -phase winding portion in series;

said V 1 -phase winding is configured by connecting a V 1-1 -phase winding portion and a V 1-2 -phase winding portion in series;

said W 1 -phase winding is configured by connecting a W 1-1 -phase winding portion and a W 1-2 -phase winding portion in series;

said U 2 -phase winding is configured by connecting a U 2-1 -phase winding portion and a U 2-2 -phase winding portion in series;

said V 2 -phase winding is configured by connecting a V 2-1 -phase winding portion and a V 2-2 -phase winding portion in series;

said W 2 -phase winding is configured by connecting a W 2-1 -phase winding portion and a W 2-2 -phase winding portion in series;

said U 1-1 -phase winding portion and said U 2-1 -phase winding portion are mounted into a first slot group that is constituted by said slots at intervals of six slots;

said U 1-2 -phase winding portion and said U 2-2 -phase winding portion are mounted into a second slot group that is constituted by said slots at intervals of six slots and that is adjacent to said first slot group;

said V 1-1 -phase winding portion and said V 2-1 -phase winding portion are mounted into a third slot group that is constituted by said slots at intervals of six slots;

said V 1-2 -phase winding portion and said V 2-2 -phase winding portion are mounted into a fourth slot group that is constituted by said slots at intervals of six slots and that is adjacent to said third slot group;

said W 1-1 -phase winding portion and said W 2-1 -phase winding portion are mounted into a fifth slot group that is constituted by said slots at intervals of six slots;

said W 1-2 -phase winding portion and said W 2-2 -phase winding portion are mounted into a sixth slot group that is constituted by said slots at intervals of six slots and that is adjacent to said fifth slot group;

said U 1-1 -phase winding portion, said U 2-2 -phase winding portion, said V 1-1 -phase winding portion, said V 2-2 -phase winding portion, said W 1-1 -phase winding portion, and said W 2-2 -phase winding portion are configured by winding conductor wires that have an identical cross-sectional shape into respective wave windings in said slots at intervals of six slots for m turns (where m is an integer);

said U 1-2 -phase winding portion, said U 2-1 -phase winding portion, said V 1-2 -phase winding portion, said V 2-1 -phase winding portion, said W 1-2 -phase winding portion, and said W 2-1 -phase winding portion are configured by winding said conductor wires into respective wave windings in said slots at intervals of six slots for n turns (where n is an integer that is different than m); and

said first three-phase stator winding and said second three-phase stator winding are connected in parallel by connecting an output end of said U 1 -phase winding and an output end of said U 2 -phase winding, by connecting an output end of said V 1 -phase winding and an output end of said V 2 -phase winding, and by connecting an output end of said W 1 -phase winding and an output end of said W 2 -phase winding.

2. A rotary electric machine according to claim 1 , wherein a neutral point of said first three-phase stator winding and a neutral point of said second three-phase stator winding are not connected.