Stator, motor, compressor, and refrigeration air conditioner
A stator includes a first core and a second core. The first core has a yoke extending in a circumferential direction about an axis line and having a second insertion hole, and a tooth extending from the yoke in a direction toward the axis line and having a first insertion hole. The second core has a first part disposed in the first insertion hole and a second part disposed in the second insertion hole and formed of amorphous metal or nanocrystal metal.
1. A stator comprising:
a first core having a yoke extending in a circumferential direction about an axis line and having a second insertion hole, and a tooth extending from the yoke in a direction toward the axis line and having a first insertion hole; and
a second core having a first part disposed in the first insertion hole and a second part disposed in the second insertion hole, the second core being formed of amorphous metal or nanocrystal metal, wherein
the tooth has a side wall on each side of the first insertion hole in the circumferential direction, and the side wall has a first opening part through which the first part of the second core is exposed.
2. The stator according to claim 1 , wherein
a length of the first insertion hole in the circumferential direction is shorter than a length of the first insertion hole in a direction perpendicular to the circumferential direction in a plane perpendicular to the axis line, and
a length of the second insertion hole in the circumferential direction is longer than a length of the second insertion hole in the direction perpendicular to the circumferential direction in the plane perpendicular to the axis line.
3. The stator according to claim 1 , wherein the first opening part is formed in a central part of the side wall in a direction of the axis line.
4. The stator according to claim 1 , wherein the first opening part is formed at each end of the side wall in a direction of the axis line.
5. The stator according to claim 1 , further comprising an insulation part disposed in the first opening part.
6. The stator according to claim 1 , wherein the first core has a partition wall between the first insertion hole and the second insertion hole.
7. The stator according to claim 6 , wherein
the first insertion hole is separated in the circumferential direction into a plurality of parts, and
the first core has a separation wall separating the plurality of parts of the first insertion hole from each other.
8. The stator according to claim 1 , wherein the second insertion hole has a shape obtained by chamfering or curving four corners of a quadrangle in a plane perpendicular to the axis line.
9. The stator according to claim 1 , wherein the first insertion hole and the second insertion hole are formed continuously.
10. The stator according to claim 9 , wherein the first part and the second part of the second core are formed integrally.
11. The stator according to claim 9 , wherein
the first part of the second core extends from the first insertion hole into an inside of the second insertion hole, and
the second part of the second core is disposed adjacent to the first part of the second core in the circumferential direction in the second insertion hole.
12. The stator according to claim 1 , wherein the first part and the second part of the second core are provided separately from each other.
13. The stator according to claim 12 , wherein the first part and the second part of the second core are formed of materials different from each other.
14. The stator according to claim 1 , wherein the first core is formed of a layered body in which a plurality of electromagnetic steel sheets are stacked.
15. The stator according to claim 14 , wherein
each of the tooth and the yoke has a crimping part, and
the plurality of electromagnetic steel sheets are fixed together by the crimping part of the tooth and the crimping part of the yoke.
16. The stator according to claim 1 , wherein
the second core is formed of a layered body in which a plurality of thin strips are stacked, and
a thickness of each of the plurality of thin strips is 0.02 mm to 0.05 mm.
17. The stator according to claim 16 , wherein an adhesive agent exists between the plurality of thin strips.
18. The stator according to claim 16 , wherein
the plurality of thin strips are thin strips of amorphous metal, and
the second core is obtained by annealing the layered body of the plurality of thin strips.
19. The stator according to claim 1 , wherein the second core is formed of a molded body of powder.
20. A motor comprising the stator according to claim 1 , and a rotor provided inside the stator.
21. The motor according to claim 20 , further comprising a cylindrical frame in which the stator is fit.
22. A compressor comprising a motor and a compression element driven by the motor, wherein the motor comprises the stator according to claim 1 and a rotor provided inside the stator.
23. A refrigeration air conditioner comprising the compressor according to claim 22 , a condenser, a decompressor and an evaporator.
24. A stator comprising:
a first core having a yoke extending in a circumferential direction about an axis line and having a second insertion hole, and a tooth extending from the yoke in a direction toward the axis line and having a first insertion hole; and
a second core having a first part disposed in the first insertion hole and a second part disposed in the second insertion hole, the second core being formed of amorphous metal or nanocrystal metal, wherein
the yoke has an inner circumferential wall on the axis line side of the second insertion hole, and the inner circumferential wall has a second opening part through which the second part of the second core is exposed.
25. The stator according to claim 24 , wherein the second opening part is formed in a central part of the inner circumferential wall in a direction of the axis line.
26. The stator according to claim 24 , wherein the second opening part is formed at each end of the inner circumferential wall in a direction of the axis line.
27. The stator according to claim 24 , further comprising an insulation part disposed in the second opening part.
28. The stator according to claim 24 , wherein the yoke has an outer circumferential wall thicker than the inner circumferential wall and located on a side opposite to the inner circumferential wall across the second insertion hole.
29. A motor comprising the stator according to claim 24 and a rotor provided inside the stator.
30. A compressor comprising a motor and a compression element driven by the motor, wherein the motor comprises the stator according to claim 24 and a rotor provided inside the stator.
31. A refrigeration air conditioner comprising the compressor according to claim 30 , a condenser, a decompressor, and an evaporator.