US 7,622,842 B2Granted

Rotary electric machine and stator for rotary electric machines

AssigneeDenso Corporation

InventorsNoriyuki Hayashi, Shigenobu Nakamura

Life of this patent

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Abstract

In a rotary electric machine, output ends of first and second three-phase windings of first and second sets included in a first group are separated from those of third and fourth three-phase windings of third and fourth sets included in a second group. Each of the first to fourth three-phase windings is inserted in the slots while being turned at one of the first and second opposing end surface sides of a stator core. Turn portions of each of the first to fourth three-phase windings at the one of the first and second opposing end surface sides of the stator core have a substantially U shape, and are so disposed as to be nonoverlapped with each other in an axial direction of the stator core.

Claims13

Dependent claims

A rotary electric machine comprising:

a rotor rotatably supported in a frame of the machine;
and
a stator disposed opposite to the rotor, the stator 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 mounted in the stator core, the first set including first three-phase windings each with output ends, the output ends of the first three-phase windings 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 mounted in the stator core, the third set including third three-phase windings each with output ends, the output ends of the third three-phase windings 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, in a circumferential direction of the stator core, from the output ends of the third and fourth three-phase windings of the third and fourth sets included in the second group, each of the first to fourth three-phase windings being inserted in the slots while being turned at the one of the first and second opposing end surface sides of the stator core,
wherein turn portions of each of the first to fourth three-phase windings at the one of the first and second opposing end surface sides of the stator core have a substantially U shape, and are so disposed as to be nonoverlapped with each other in an axial direction of the stator core.

6 more elements

A rotary electric machine comprising:

a rotor rotatably supported in a frame of the machine;
and
a stator disposed opposite to the rotor, the stator 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 mounted in the stator core, the first set including first three-phase windings each with output ends disposed respectively at circumferential positions opposite the stator core, the output ends of the first three-phase windings 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 mounted in the stator core, the third set including third three-phase windings each with output ends disposed respectively at circumferential positions opposite the stator core, the output ends of the third three-phase windings 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, each of the first to fourth three-phase windings being inserted in the slots while being turned at the one of the first and second opposing end surface sides of the stator core, 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,
wherein turn portions of each of the first to fourth three-phase windings at the one of the first and second opposing end surface sides of the stator core have a substantially U shape, and are so disposed as to be nonoverlapped with each other in an axial direction of the stator core.

6 more elements

A stator 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 mounted in the stator core, the first set including first three-phase windings each with output ends, the output ends of the first three-phase windings 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 mounted in the stator core, the third set including third three-phase windings each with output ends, the output ends of the third three-phase windings 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, in a circumferential direction of the stator core, from the output ends of the third and fourth three-phase windings of the third and fourth sets included in the second group, each of the first to fourth three-phase windings being inserted in the slots while being turned at the one of the first and second opposing end surface sides of the stator core,
wherein turn portions of each of the first to fourth three-phase windings at the one of the first and second opposing end surface sides of the stator core have a substantially U shape, and are so disposed as to be nonoverlapped with each other in an axial direction of the stator core.

4 more elements

A stator 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 mounted in the stator core, the first set including first three-phase windings each with output ends disposed respectively at circumferential positions opposite the stator core, the output ends of the first three-phase windings 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 mounted in the stator core, the third set including third three-phase windings each with output ends disposed respectively at circumferential positions opposite the stator core, the output ends of the third three-phase windings 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, each of the first to fourth three-phase windings being inserted in the slots while being turned at the one of the first and second opposing end surface sides of the stator core, 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,
wherein turn portions of each of the first to fourth three-phase windings at the one of the first and second opposing end surface sides of the stator core have a substantially U shape, and are so disposed as to be nonoverlapped with each other in an axial direction of the stator core.

4 more elements

Dependencies are inferred from the claim text.

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Abstract

A rotary electric machine comprising:

a rotor rotatably supported in a frame of the machine;
and
a stator disposed opposite to the rotor, the stator 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 mounted in the stator core, the first set including first three-phase windings each with output ends, the output ends of the first three-phase windings 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 mounted in the stator core, the third set including third three-phase windings each with output ends, the output ends of the third three-phase windings 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, in a circumferential direction of the stator core, from the output ends of the third and fourth three-phase windings of the third and fourth sets included in the second group, each of the first to fourth three-phase windings being inserted in the slots while being turned at the one of the first and second opposing end surface sides of the stator core,
wherein turn portions of each of the first to fourth three-phase windings at the one of the first and second opposing end surface sides of the stator core have a substantially U shape, and are so disposed as to be nonoverlapped with each other in an axial direction of the stator core.

6 more elements