Stator for electric rotating machine
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0175010
(2011-07-01)
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등록번호 |
US-8653714
(2014-02-18)
|
우선권정보 |
JP-2010-154165 (2010-07-06) |
발명자
/ 주소 |
- Taniguchi, Makoto
- Ito, Satoshi
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
A stator for an electric rotating machine includes a stator core that has an annular yoke portion, a plurality of tooth portions, a plurality of connecting portions and a plurality of slots. The tooth portions are separately formed from and assembled to the yoke portion. Each of the tooth portions e
A stator for an electric rotating machine includes a stator core that has an annular yoke portion, a plurality of tooth portions, a plurality of connecting portions and a plurality of slots. The tooth portions are separately formed from and assembled to the yoke portion. Each of the tooth portions extends radially inward from a radially inner periphery of the yoke portion. The tooth portions are arranged in the circumferential direction of the yoke portion at predetermined intervals. Each of the connecting portions circumferentially extends to connect a corresponding circumferentially-adjacent pair of the tooth portions. Each of the slots is formed between a circumferentially-adjacent pair of the tooth portions. Moreover, each of the slots is partitioned by a corresponding one of the connecting portions into a radially-outer section and a radially-inner section.
대표청구항
▼
1. A stator for an electric rotating machine, the stator comprising: a stator core that includes an annular yoke portion, a plurality of tooth portions and a plurality of slots, each of the tooth portions extending radially inward from a radially inner periphery of the yoke portion, the tooth portio
1. A stator for an electric rotating machine, the stator comprising: a stator core that includes an annular yoke portion, a plurality of tooth portions and a plurality of slots, each of the tooth portions extending radially inward from a radially inner periphery of the yoke portion, the tooth portions being arranged in a circumferential direction of the yoke portion at predetermined intervals, each of the slots being formed between a circumferentially-adjacent pair of the tooth portions; anda stator coil that is mounted on the stator core so as to have a plurality of in-slot portions each of which is received in a corresponding one of the slots of the stator core,whereinthe tooth portions of the stator core are separately formed from and assembled to the yoke portion,the stator core further comprises a plurality of connecting portions each of which circumferentially extends to connect a corresponding circumferentially-adjacent pair of the tooth portions,each of the slots of the stator core is partitioned by a corresponding one of the connecting portions into a radially-outer section and a radially-inner section, andthe stator coil is mounted on the stator core so that:in each of the radially-outer and radially-inner sections of the slots, there is received at least one of the in-slot portions of the stator coil,for each of the slots, the at least one in-slot portion received in the radially-outer section of the slot creates a first magnetic field while the at least one in-slot portion received in the radially-inner section of the slot creates a second magnetic field, andthe magnitudes of the first and second magnetic fields are equal to each other, but the directions of the first and second magnetic fields are opposite to each other at the corresponding connecting portion by which the slot is partitioned. 2. The stator as set forth in claim 1, wherein each of the slots is equally partitioned by the corresponding connecting portion so that the area of a cross section of the radially-outer section perpendicular to the axial direction of the yoke portion is equal to that of the radially-inner section perpendicular to the axial direction. 3. The stator as set forth in claim 1, wherein the yoke portion has a plurality of recesses that are formed in a radially inner surface of the yoke portion and spaced at predetermined intervals in the circumferential direction of the yoke portion, each of the tooth portions has a protrusion formed at a radially outer end thereof, andthe tooth portions are assembled to the yoke portion by fitting the protrusions of the tooth portions respectively into the recesses of the yoke portion. 4. The stator as set forth in claim 1, wherein the tooth portions are assembled to the yoke portion by press-fitting radially outer surfaces of the tooth portions to a radially inner surface of the yoke portion. 5. The stator as set forth in claim 1, wherein the tooth portions are shaped so that each of the slots formed between the tooth portions has a constant circumferential width in a radial direction of the yoke portion. 6. The stator as set forth in claim 1, wherein the tooth portions are so shaped as to have a constant circumferential width in a radial direction of the yoke portion. 7. The stator as set forth in claim 1, wherein the following dimensional relationship is satisfied: a≧b>d, where a is the maximum width of each of the in-slot portions of the stator coil in a width-wise direction of the corresponding slot, b is the maximum thickness of each of the in-slot portions of the stator coil in a radial direction of the stator core, and d is the radial thickness of the connecting portions of the stator core. 8. The stator as set forth in claim 1, wherein all of the tooth portions and connecting portions of the stator core together make up a stator tooth ring, the stator tooth ring is formed of a plurality of magnetic steel sheets that are laminated in the axial direction of the yoke portion,the radial thickness of the connecting portions is set to be greater than the thickness of the magnetic steel sheets.
이 특허에 인용된 특허 (6)
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Nose Tamotsu,JPX, Armature structure of toroidal winding type rotating electric machine.
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Suzuki, Hiroyuki; Sugishima, Kazushi; Nishikawa, Yoshihito; Matsushita, Mitsuhiko, Brushless motor.
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Bell, Joshua; Dooley, Kevin Allan, Electric machine having an integrally continuous stator winding and stator slot bridges.
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Toshihiko Sakai JP; Koichiro Ohara JP; Takuya Kawashima JP, Electric rotating machine having structure of shifting stator position by predetermined angle.
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Itoh Kazuo,JPX ; Tachibana Toshiyuki,JPX, Manufacturing process of a divided type stator.
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Dooley,Kevin Allan, Modulation control of power generation system.
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