Stator, electric motor, compressor, air conditioner, and method for fabricating stator
AssigneeMitsubishi Electric Corporation
InventorsAtsushi ISHIKAWA, Atsushi MATSUOKA
Life of this patent
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Abstract
A stator includes a stator core, three-phase coils attached to the stator core by distributed winding, and a first insulator insulating the three-phase coils. The three-phase coils include 2 × n U-phase coils, 2 × n V-phase coils, and 2 × n W-phase coils in a coil end. Each of the 2 × n U-phase coils, the 2 × n V-phase coils, and the 2 × n W-phase coils includes n first coils and n second coils. The n second coils are disposed outward from the n first coils in the coil end. The first insulator is disposed in the slot where the second coils are disposed.
Claims10
A stator comprising:
- a stator core including 9 × n (n is an integer equal to or larger than 1) slots;
- three-phase coils attached to the stator core by distributed winding and to form 4 × n magnetic poles;
- and
- a first insulator insulating the three-phase coils, wherein
- the three-phase coils include 2 × n U-phase coils, 2 × n V-phase coils, and 2 × n W-phase coils in a coil end of the three-phase coils,
- the 2 × n U-phase coils are connected in series,
- the 2 × n V-phase coils are connected in series,
- the 2 × n W-phase coils are connected in series,
- each of the 2 × n U-phase coils, the 2 × n V-phase coils, and the 2 × n W-phase coils includes n first coils disposed in the stator core at two-slot pitch and n second coils disposed in the stator core at three-slot pitch,
- the n first coils are disposed in the coil end every 360/n degrees in a circumferential direction at regular intervals,
- the n second coils are disposed in the coil end every 360/n degrees in the circumferential direction at regular intervals,
- the n second coils are disposed outward from the n first coils in a radial direction in the coil end, and
- the first insulator is disposed in a slot in which the second coil is disposed, of the 9 × n slots.
A stator comprising:
- a stator core including 9 × n (n is an integer equal to or larger than 1) slots;
- three-phase coils attached to the stator core by distributed winding and to form 4 × n magnetic poles;
- and
- a first insulator insulating the three-phase coils, wherein
- the three-phase coils include 2 × n U-phase coils, 2 × n V-phase coils, and 2 × n W-phase coils in a coil end of the three-phase coils,
- the 2 × n U-phase coils are connected in series,
- the 2 × n V-phase coils are connected in series,
- the 2 × n W-phase coils are connected in series,
- each of the 2 × n U-phase coils, the 2 × n V-phase coils, and the 2 × n W-phase coils includes n first coils disposed in the stator core at two-slot pitch and n second coils disposed in the stator core at three-slot pitch,
- the n first coils are disposed in the coil end every 360/n degrees in a circumferential direction at regular intervals,
- the n second coils are disposed in the coil end every 360/n degrees in the circumferential direction at regular intervals,
- the n first coils are disposed outward from the n second coils in a radial direction in the coil end, and
- the first insulator is disposed in a slot in which the second coil is disposed, of the 9 × n slots.
A method for fabricating a stator, the stator including a stator core including slots and three-phase coils including 2 × n (n is an integer equal to or larger than 1) U-phase coils, 2 × n V-phase coils, and 2 × n W-phase coils in a coil end,
- each of the 2 × n U-phase coils, the 2 × n V-phase coils, and the 2 × n W-phase coils including n first coils and n second coils, the method comprising:
- disposing the n second coils in the stator core at three-slot pitch;
- disposing an insulator in the slots where the second coils are disposed to insulate the n second coils;
- and
- disposing the n first coils inward from the n second coils in a radial direction at two-slot pitch.
A method for fabricating a stator, the stator including a stator core including slots and three-phase coils including 2 × n (n is an integer equal to or larger than 1) U-phase coils, 2 × n V-phase coils, and 2 × n W-phase coils in a coil end,
- each of the 2 × n U-phase coils, the 2 × n V-phase coils, and the 2 × n W-phase coils including n first coils and n second coils, the method comprising:
- disposing the n first coils in the stator core at two-slot pitch;
- disposing the n second coils inward from the n first coils in a radial direction at three-slot pitch;
- and
- disposing an insulator in the slots where the second coils are disposed to insulate the n second coils.
Dependencies are inferred from the claim text.