Rotary electric machine and stator coil for rotary electric machines

A rotary electric machine comprising:

• a stator core having axially opposing end surfaces and a plurality of substantially circumferentially spaced slots;
• and
• a stator coil, the stator coil comprising:
• a first group of first and second sets of three-phase windings disposed in part of the slots, the first set including first three-phase windings each with output ends disposed respectively at first circumferential positions in opposition to the stator core, the output ends of the first three-phase winding being connected in series to each other to form delta configuration with junctions between the first three-phase windings, the second set including second three-phase windings having output and input ends, the input ends being respectively connected in series to the junctions of the first three-phase windings, and
• a second group of third and fourth sets of three-phase windings disposed in another part of the slots, the third set including third three-phase windings each with output ends disposed respectively at first circumferential positions in opposition to the stator core, the output ends of the third three-phase winding being connected in series to each other to form delta configuration with junctions between the third three-phase windings, the fourth set including fourth three-phase windings having output and input ends, the input ends being respectively connected in series to the junctions of the third three-phase windings, the output ends of the first to fourth three-phase windings and the input ends of the second and fourth windings being disposed at one of the opposing end surface sides of the stator core,
• wherein the circumferential positions of the output positions of at least one of the first three-phase windings and the third three-phase windings are disposed to be included in the circumferential positions of the output ends of at least one of the second three-phase windings and the fourth three-phase windings.

A stator coil to be provided in a stator core, the stator core having axially opposing end surfaces and a plurality of substantially circumferentially spaced slots, the stator coil comprising:

• a first group of first and second sets of three-phase windings disposed in part of the slots, the first set including first three-phase windings each with output ends, the output ends of the first three-phase winding being connected in series to each other to form delta configuration with junctions between the first three-phase windings, the second set including second three-phase windings having output and input ends, the input ends being respectively connected in series to the junctions of the first three-phase windings, and
• a second group of third and fourth sets of three-phase windings disposed in another part of the slots, the third set including third three-phase windings each with output ends, the output ends of the third three-phase winding being connected in series to each other to form delta configuration with junctions between the third three-phase windings, the fourth set including fourth three-phase windings having output and input ends, the input ends being respectively connected in series to the junctions of the third three-phase windings, the output ends of the first to fourth three-phase windings and the input ends of the second and fourth windings being disposed at one of the opposing end surface sides of the stator core, the output ends of the first and second three-phase windings of the first and second sets included in the first group being separated from the output ends of the third and fourth three-phase windings of the third and fourth sets included in the second group.

A stator coil to be provided in a stator core, the stator core having axially opposing end surfaces and a plurality of substantially circumferentially spaced slots, the stator coil comprising:

• a first group of first and second sets of three-phase windings disposed in part of the slots, the first set including first three-phase windings each with output ends disposed respectively at first circumferential positions in opposition to the stator core, the output ends of the first three-phase winding being connected in series to each other to form delta configuration with junctions between the first three-phase windings, the second set including second three-phase windings having output and input ends, the input ends being respectively connected in series to the junctions of the first tree-phase windings, and
• a second group of third and fourth sets of three-phase windings disposed in another part of the slots, the third set including third three-phase windings each with output ends disposed respectively at first circumferential positions in opposition to the stator cord, the output ends of the third three-phase winding being connected in series to each other to form delta configuration with junctions between the third three-phase windings, the fourth set including fourth three-phase windings having output and input ends, the input ends being respectively connected in series to the junctions of the third three-phase windings, the output ends of the first to fourth three-phase windings and the input ends of the second and fourth windings being disposed at one of the opposing end surface sides of the stator core,
• wherein the circumferential positions of the output positions of at least one of the first three-phase windings and the third three-phase windings are disposed to be included in the circumferential positions of the output ends of at least one of the second three-phase windings and the fourth three-phase windings.