Stator, electric rotating machine, and electric-powered vehicle

Patent metadata

Field	Value
Publication number	US-11677287-B2
Application number	US-202016952969-A
Country	US
Kind code	B2
Filing date	Nov 19, 2020
Priority date	Jan 15, 2020
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A stator includes a stator core and a stator winding. The stator core has a cylindrical shape and a plurality of slots. The stator winding includes a plurality of phase windings each including a plurality of segment conductors inserted into the slots and coupled to each other in series. Each of the segment conductors has a pair of straight parts and a bend. The pair of straight parts is accommodated in two of the plurality of slots. The bend protrudes from an end face of the stator core and couples the pair of straight parts to each other. In each of the plurality of slots, the number of the bends protruding from the end face of the stator core to extend in one of circumferential directions matches the number of the bends protruding from the end face of the stator core to extend in the other of the circumferential directions.

First claim

The invention claimed is:

1. A stator to be provided in an electric rotating machine, the stator comprising:
a stator core having a cylindrical shape and a plurality of slots; and
a stator winding that includes a plurality of phase windings each including a plurality of segment conductors inserted into the slots and coupled to each other in series,
wherein each of the segment conductors has a pair of straight parts and a bend, the pair of straight parts being accommodated in two of the plurality of slots, the bend protruding from an end face of the stator core and coupling the pair of straight parts to each other, and,
in each of the plurality of slots, number of the bends protruding from the end face of the stator core to extend in one of circumferential directions matches number of the bends protruding from the end face of the stator core to extend in the other of the circumferential directions, wherein

the phase windings include
a first coil including first segment conductors out of the segment conductors, straight parts of the first segment conductors configured to be inserted into
a first slot out of the plurality of the slots and
a second slot far from the first slot by a predetermined number of slots in circumferential direction,

a second coil including second segment conductors out of the segment conductors, straight parts of the second segment conductors configured to be inserted into
a third slot far from the second slot by the predetermined number of slots in the circumferential direction and
a fourth slot far from the third slot by the predetermined number of slots in the circumferential direction, and

a single coil being a segment conductor out of the plurality of segment conductors, straight parts of the single coil configured to be inserted into the second slot and the third slot, and coupled with the first coil and the second coil in series.

2. The stator according to claim 1 , wherein
each of the phase windings includes a plurality of series conductor groups coupled to each other in parallel, and
each of the series conductor groups includes the plurality of segment conductors coupled to each other in series.

3. The stator according to claim 2 , wherein each of the series conductor groups includes a first conductor group accommodated in a first slot group and a second conductor group accommodated in a second slot group, the first slot group including two or more slots disposed to be evenly spaced, out of the plurality of slots, the second slot group including two or more slots disposed to be evenly spaced and be shifted from the first slot group in the circumferential direction, out of the plurality of slots.

4. The stator according to claim 3 , further comprising a ring-shaped coil end that includes the bends protruding from the end face of the stator core,
wherein numbers of the bends included in respective cross-sections of the coil end match each other, the cross-sections being taken between the slots.

5. The electric rotating machine comprising:
the stator according to claim 4 ; and
a rotor including a plurality of permanent magnets arranged in the circumferential directions, and provided on an inner circumference side of the stator to be relatively rotatable with respect to the stator.

6. An electric-powered vehicle comprising the electric rotating machine according to claim 5 as a driving source.

7. The electric rotating machine comprising:
the stator according to claim 3 ; and
a rotor including a plurality of permanent magnets arranged in the circumferential directions, and provided on an inner circumference side of the stator to be relatively rotatable with respect to the stator.

8. An electric-powered vehicle comprising the electric rotating machine according to claim 7 as a driving source.

9. The stator according to claim 2 , further comprising a ring-shaped coil end that includes the bends protruding from the end face of the stator core,
wherein numbers of the bends included in respective cross-sections of the coil end match each other, the cross-sections being taken between the plurality of slots.

10. The electric rotating machine comprising:
the stator according to claim 9 ; and
a rotor including a plurality of permanent magnets arranged in the circumferential directions, and provided on an inner circumference side of the stator to be relatively rotatable with respect to the stator.

11. An electric-powered vehicle comprising the electric rotating machine according to claim 10 as a driving source.

12. The electric rotating machine comprising:
the stator according to claim 2 ; and
a rotor including a plurality of permanent magnets arranged in the circumferential directions, and provided on an inner circumference side of the stator to be relatively rotatable with respect to the stator.

13. An electric-powered vehicle comprising the electric rotating machine according to claim 12 as a driving source.

14. The stator according to claim 2 , wherein induced voltages are generated in the series conductor groups to match each other, and
wherein each of the plurality of phase windings have a same coil structure.

15. The stator according to claim 1 , further comprising a ring-shaped coil end that includes the bends protruding from the end face of the stator core,
wherein numbers of the bends included in respective cross-sections of the coil end match each other, the cross-sections being taken between the plurality of slots.

16. The electric rotating machine comprising:
the stator according to claim 15 ; and
a rotor including a plurality of permanent magnets arranged in the circumferential directions, and provided on an inner circumference side of the stator to be relatively rotatable with respect to the stator.

17. An electric-powered vehicle comprising the electric rotating machine according to claim 16 as a driving source.

18. The electric rotating machine comprising:
the stator according to claim 1 ; and
a rotor including a plurality of permanent magnets arranged in the circumferential directions, and provided on an inner circumference side of the stator to be relatively rotatable with respect to the stator.

19. An electric-powered vehicle comprising the electric rotating machine according to claim 18 as a driving source.

20. A stator to be provided in an electric rotating machine, the stator comprising:
a stator core having a cylindrical shape and a plurality of slots; and
a stator winding that includes a plurality of phase windings each including a plurality of segment conductors inserted into the slots and coupled to each other in series, wherein
the phase windings include
a first coil including first segment conductors out of the segment conductors, straight parts of the first segment conductors configured to be inserted into
a first slot out of the plurality of the slots and
a second slot far from the first slot by a predetermined number of slots in circumferential direction,
a second coil including second segment conductors out of the segment conductors, straight parts of the second segment conductors configured to be inserted into
a third slot far from the second slot by the predetermined number of slots in the circumferential direction and
a fourth slot far from the third slot by the predetermined number of slots in the circumferential direction, and

a single coil being a segment conductor out of the plurality of segment conductors, straight parts of the single coil configured to be inserted into the second slot and

Assignees

• Subaru Corp

Inventors

• Fukunaga Kenichi
• Nagase Kimihiro

Classifications

• B60K1/00

  Arrangement or mounting of electrical propulsion units (B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00) · CPC title

• H02K3/28 Primary

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K21/14

  with magnets rotating within the armatures · CPC title

• H02K3/12

  arranged in slots · CPC title

• H02K1/165

  Shape, form or location of the slots · CPC title