IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0203248
(2005-08-15)
|
등록번호 |
US-7372184
(2008-05-13)
|
우선권정보 |
KR-10-2004-0067202(2004-08-25) |
발명자
/ 주소 |
- Shim,Jang Ho
- Park,Jin Soo
- Kim,Byung Taek
|
출원인 / 주소 |
|
대리인 / 주소 |
Birch, Stewart, Kolasch & Birch, LLP
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
12 |
초록
▼
A stator of a motor having various shapes and capable of minimizing the manufacturing costs. At least teeth are manufactured by the iron powder metallurgy method. In order to obtain the overhang effect, the height of a tip of each tooth is lower than the height of a rotor and the height of a yoke is
A stator of a motor having various shapes and capable of minimizing the manufacturing costs. At least teeth are manufactured by the iron powder metallurgy method. In order to obtain the overhang effect, the height of a tip of each tooth is lower than the height of a rotor and the height of a yoke is higher than the height of a tip of each tooth so as to minimize the core loss of the yoke. Since, in order to minimize the end coil, the height of a neck of each tooth is gradually higher as running from the sides to the central portion in the circumferential direction, costs for manufacturing a motor can be minimized and sufficient efficiency can be obtained.
대표청구항
▼
What is claimed is: 1. A stator of a motor comprising: a plurality of teeth spaced apart from each other along the circumference of a rotor; a yoke for connecting the teeth to each other; and coils wound around the teeth; wherein the height of a tip of each tooth facing the rotor is lower than the
What is claimed is: 1. A stator of a motor comprising: a plurality of teeth spaced apart from each other along the circumference of a rotor; a yoke for connecting the teeth to each other; and coils wound around the teeth; wherein the height of a tip of each tooth facing the rotor is lower than the height of the rotor, and the height of the yoke is higher than the height of the tip of each tooth, wherein the height of the rotor and the height of the yoke are substantially the same, and wherein a top surface of the yoke and a top surface of the rotor are substantially co-planar. 2. The stator of a motor as set forth in claim 1, wherein each tooth has a neck, between the tip of each tooth and the yoke, around which the coil is wound, the neck having an upper arcuate surface, a lower arcuate surface and two substantially straight vertical sidewalls between and connecting the upper arcuate surface and the lower arcuate surface. 3. The stator of a motor as set forth in claim 2, wherein the height of the neck of each tooth is lower than that of the tip of each tooth. 4. The stator of a motor as set forth in claim 1, wherein the teeth and the yoke are integrated with each other by the iron powder metallurgy method. 5. The stator of a motor as set forth in claim 4, wherein each tooth has a neck, between the tip of each tooth and the yoke, around which the coil is wound, the neck having an upper arcuate surface, a lower arcuate surface and two substantially straight vertical sidewalls between and connecting the upper arcuate surface and the lower arcuate surface. 6. The stator of a motor as set forth in claim 5, wherein the height of the neck of each tooth is lower than the height of the tip of each tooth. 7. A stator of a motor comprising: a plurality of teeth spaced apart from each other along the circumference of a rotor, each of the teeth having a connector; a yoke for connecting the teeth to each other, the yoke having a plurality of connector recesses on an inner circumferential wall of the yoke, each of the connectors being inserted into a corresponding one of the connector recesses; and coils wound around the teeth; wherein the height of a tip of each tooth facing the rotor is lower than the height of the rotor, the height of the yoke is higher than the height of the tip of each tooth, and the teeth and the yoke are made of different materials, wherein the height of the connector of each of the teeth is greater than the height of the tip of each of the teeth, but not higher than the height of the yoke. 8. The stator of a motor as set forth in claim 7, wherein the teeth are manufactured by the iron powder metallurgy method, and the yoke is manufactured from an electrical steel sheet by the spiral method. 9. The stator of a motor as set forth in claim 8, wherein the connector recesses are formed on the inner circumferential wall of the yoke in a vertical direction. 10. The stator of a motor as set forth in claim 9, wherein the circumferential widths of the connector of each tooth and the connector recess of the yoke are substantially continuously widened from one end facing the neck to an opposite end facing the yoke so as to prevent the separation in the radial direction. 11. The stator of a motor as set forth in claim 9, wherein the height of each tooth is lower than the height of the yoke. 12. The stator of a motor as set forth in claim 8, wherein each tooth has a neck, provided between the tip of each tooth and the yoke, around which the coils are wound, and the neck has an upper arcuate surface, a lower arcuate surface and two substantially straight vertical sidewalls between and connecting the upper arcuate surface and the lower arcuate surface. 13. The stator of a motor as set forth in claim 12, wherein the height of the neck of each tooth is lower than the height of the tip of each tooth. 14. The stator of a motor as set forth in claim 8, wherein the teeth and the yoke are coupled to each other in the vertical direction by fitting. 15. A stator of a motor comprising: a plurality of teeth spaced apart from each other along the circumference of a rotor; a yoke for connecting the teeth to each other; and coils wound around the teeth; wherein each tooth includes a tip facing the rotor and having the height lower than those of the rotor and the yoke, a connector coupled with the yoke, and a neck, disposed between the connector and the tip, around which each coil wound, the neck having an upper arcuate surface, a lower arcuate surface and two substantially straight vertical sidewalls between and connecting the upper arcuate surface and the lower arcuate surface, wherein the height of the connector of each tooth is greater than the height of the tip of each tooth, but not higher than the height of the yoke. 16. The stator of a motor as set forth in claim 15, wherein the teeth are manufactured by the iron powder metallurgy method, and the yoke is manufactured from an electrical steel sheet by the spiral method. 17. The stator of a motor as set forth in claim 16, wherein the connector of each tooth is inserted into a connector recess formed on an inner circumferential wall of the yoke in a vertical direction. 18. The stator of a motor as set forth in claim 17, wherein the circumferential widths of the connector of each tooth and the connector recess of the yoke are substantially continuously widened from one end facing the neck to an opposite end facing the yoke so as to prevent the separation in the radial direction. 19. The stator of a motor as set forth in claim 16, wherein the height of the neck of each tooth is lower than the height of the tip of each tooth. 20. The stator of a motor as set forth in claim 1, wherein each of the teeth has a connector, the yoke having a plurality of connector recesses on an inner circumferential wall of the yoke, each of the connectors being inserted into a corresponding one of the connector recesses, the height of the connector of each of the teeth being greater than the height of the tip of each of the teeth. 21. The stator of a motor as set forth in claim 20, wherein each of the teeth has a neck, disposed between the connector and the tip, around which each coil wound, the neck having an upper arcuate surface, a lower arcuate surface and two substantially straight vertical sidewalls between and connecting the upper arcuate surface and the lower arcuate surface. 22. The stator of a motor as set forth in claim 7, wherein the height of the rotor and the height of the yoke are substantially the same. 23. The stator of a motor as set forth in claim 22, wherein a top surface of the yoke and a top surface of the rotor are substantially co-planar. 24. The stator of a motor as set forth in claim 15, wherein the height of the rotor and the height of the yoke are substantially the same. 25. The stator of a motor as set forth in claim 24, wherein a top surface of the yoke and a top surface of the rotor are substantially co-planar. 26. The stator of a motor as set forth in claim 15, wherein the height of the connector of each tooth is lower than the height of the yoke. 27. A stator of a motor comprising: a plurality of teeth spaced apart from each other along a circumference of a rotor; a yoke for connecting the teeth to each other; and coils wound around the teeth; wherein the height of a tip of each tooth facing the rotor is lower than the height of the rotor, and the height of the yoke is higher than the height of the tip of each tooth, wherein the teeth are protruded radially from an inner surface of the yoke toward the rotor which is positioned inside the yoke, and wherein a top surface of the yoke and a top surface of the rotor are substantially co-planar.
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