IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0780157
(2007-07-19)
|
등록번호 |
US-7768172
(2010-08-24)
|
우선권정보 |
JP-2006-197562(2006-07-20) |
발명자
/ 주소 |
- Takahata, Ryoichi
- Kikuchi, Satoshi
- Wakui, Shinichi
- Noma, Keiji
- Senoo, Masaharu
|
출원인 / 주소 |
- Hitachi Industrial Equipment Systems Co., Ltd.
|
대리인 / 주소 |
Antonelli, Terry, Stout & Kraus, LLP.
|
인용정보 |
피인용 횟수 :
11 인용 특허 :
11 |
초록
▼
A permanent magnet type electric rotary machine includes a stator including a stator core having teeth and slots, and a rotor provided with permanent magnets as magnet poles in a rotor core. A pole core portion which between each of the permanent magnets and an outer surface of the rotor core is pro
A permanent magnet type electric rotary machine includes a stator including a stator core having teeth and slots, and a rotor provided with permanent magnets as magnet poles in a rotor core. A pole core portion which between each of the permanent magnets and an outer surface of the rotor core is provided with a plurality of pole slits. A region of the pole core portion is defined by concave portions provided on q-axes to be interpolars on both sides of the pole core portion, and thereby configured that a gap between the outer surface on the q-axis of the rotor core and an inner surface of the stator core is larger than a gap between the outer surface on the d-axis of the pole core portion and the inner surface of the stator, so that magnetic fluxes from the permanent magnet pass through the pole core portion concentrately.
대표청구항
▼
What is claimed is: 1. A permanent magnet type electric rotary machine comprising: a stator including a stator core having teeth and slots between adjacent teeth, and a concentrated winding as an armature winding installed in each of the slots so as to surround each of the teeth; and a rotor provid
What is claimed is: 1. A permanent magnet type electric rotary machine comprising: a stator including a stator core having teeth and slots between adjacent teeth, and a concentrated winding as an armature winding installed in each of the slots so as to surround each of the teeth; and a rotor provided with permanent magnets as magnet poles installed in a plurality of permanent magnet insertion holes provided in a rotor core respectively, the rotor being rotatably supported inside the stator keeping a gap between the rotor core and the stator core by a rotating shaft, wherein defining that a magnetic flux axis of each of the permanent magnets is a d-axis, and an axis 90° apart in electrical angle from the d-axis is a q-axis, respective install positions of the permanent magnets in the rotor core are set between adjacent q-axes, wherein a pole core portion between each of the permanent magnets and an outer surface of the rotor core is provided with a plurality of pole slits, wherein the region of the pole core portion is defined by concave portions provided on q-axes to be interpolars on both sides of the pole core portion, and thereby configured that a gap (g2) between the outer surface on the q-axis of the rotor core and an inner surface of the stator core is larger than a gap (g1) between the outer surface on the d-axis of the pole core portion and the inner surface of the stator, so that magnetic fluxes from the permanent magnet pass through the pole core portion concentrately, wherein the outer surface like an arc-shape of the pole core portion is formed asymmetrically with respect to the d-axis by making circumferential-direction lengths of the concave portions on both sides of the pole core portion different from each other; and wherein each of the concave portion is formed in the axial direction of the rotor core, with at least one stepped v-shape skew structure in view of the circumferential direction of the rotor core, so that the pole core portion has at least one stepped v-shape skew structure. 2. A permanent magnet type electric rotary machine comprising: a stator including a stator core having teeth and slots between adjacent teeth, and a concentrated winding as an armature winding installed in each of the slots so as to surround each of the teeth; and a rotor provided with permanent magnets as magnet poles installed in a plurality of permanent magnet insertion holes provided in a rotor core respectively, the rotor being rotatably supported inside the stator keeping a gap between the rotor core and the stator core by a rotating shaft, wherein defining that a magnetic flux axis of each of the permanent magnets is a d-axis, and an axis 90° apart in electrical angle from the d-axis is a q-axis, respective install positions of the permanent magnets in the rotor core are set between adjacent q-axes, wherein a pole core portion between each of the permanent magnets and an outer surface of the rotor core is provided with a plurality of pole slits, wherein the region of the pole core portion is defined by concave portions provided on q-axes to be interpolars on both sides of the pole core portion, and thereby configured that a gap (g2) between the outer surface on the q-axis of the rotor core and an inner surface of the stator core is larger than a gap (g1) between the outer surface on the d-axis of the pole core portion and the inner surface of the stator, so that magnetic fluxes from the permanent magnet pass through the pole core portion concentrately, wherein the outer surface like an arc-shape of the pole core portion is formed asymmetrically with respect to the d-axis by making circumferential-direction lengths of the concave portions on both sides of the pole core portion different from each other; and wherein each of the concave portion is formed with at least one stepped zigzag skew structure in the axial direction of the rotor core, so that the pole core portion has at least one stepped zigzag skew structure, and both end sides in axial direction of the zigzag skew structure are formed in the same shape. 3. The permanent magnet type electric rotary machine according to claim 2, wherein the outer surface of the rotor core on the q-axes to be interpolars between the adjacent permanent magnet install positions are provided with v-cut grooves in axial direction of the rotor respectively. 4. The permanent magnet type electric rotary machine according to claim 2, wherein the pole slits formed in the pole core portion have a slant angle. 5. The permanent magnet type electric rotary machine according to claim 2, wherein the pole slits formed in the pole core portion have a slant angle and are arranged at irregular pitches. 6. The permanent magnet type electric rotary machine according to claim 2, wherein the pole slits formed in the pole core portion have different slant angles respectively, and extended lines of respective slant directions intersect to each other on a center line of the pole core portion. 7. The permanent magnet type electric rotary machine according to claim 2, wherein the pole slits formed in the pole core portion are arranged symmetrically with respect to a center line of the pole core portion. 8. The permanent magnet type electric rotary machine according to claim 2, wherein a spread angle of range of the pole core portion having the gap (g1) is within range of 90 to 120° in electrical angle with respect to a center of the rotor core. 9. The permanent magnet type electric rotary machine according to claim 2, wherein a ratio between the number of poles of the rotor and the number of slots of the stator is 2:3. 10. The permanent magnet type electric rotary machine according to claim 2, wherein the permanent magnets embedded in the rotor core are positioned in a square arrangement around the shaft hole on the whole or a v-shape arrangement protruding toward the rotor shaft insertion hole per one pole. 11. The permanent magnet type electric rotary machine according to claim 2, wherein the outer surface of the rotor core is provided with a plurality of cut portions for defining the respective pole core portions, and wherein each of the cut portions is formed by a combination of straight-line cuts and arc-shaped cuts. 12. The permanent magnet type electric rotary machine according to claim 2, wherein the outer surface of the rotor core is provided with a plurality of cut portions for defining the respective pole core portions, and wherein each of the cut portions is formed by a combination of a v-shape cut groove and an arc-shape concave portion. 13. A compressor including a permanent magnet type electric rotary machine according to claims 2. 14. The permanent magnet type electric rotary machine according to claim 1, wherein each concave portion is formed in the axial direction of the rotor core, with a plurality of stepped v-shape skew structures in view of the circumferential direction of the rotor core, so that the pole core portion has a plurality of stepped v-shape skew structures. 15. The permanent magnet type electric rotary machine according to claim 2, wherein each concave portion is formed in the axial direction of the rotor core, with a plurality of stepped zigzag skew structures forming a stepped w-shape skew structure in view of the circumferential direction of the rotor core, so that the pole core portion has a plurality of stepped zigzag skew structures forming a stepped w-shape skew structure. 16. A permanent magnet type electric rotary machine comprising: a stator including a stator core having teeth and slots between adjacent teeth, and a concentrated winding as an armature winding installed in each of the slots so as to surround each of the teeth; and a rotor provided with permanent magnets as magnet poles installed in a plurality of permanent magnet insertion holes provided in a rotor core respectively, the rotor being rotatably supported inside the stator keeping a gap between the rotor core and the stator core by a rotating shaft, wherein defining that a magnetic flux axis of each of the permanent magnets is a d-axis, and an axis 90° apart in electrical angle from the d-axis is a q-axis, respective install positions of the permanent magnets in the rotor core are set between adjacent q-axes, wherein a pole core portion between each of the permanent magnets and an outer surface of the rotor core is provided with a plurality of pole slits, wherein the region of the pole core portion is defined by concave portions provided on q-axes to be interpolars on both sides of the pole core portion, wherein the outer surface like an arc-shape of the pole core portion is formed asymmetrically with respect to the d-axis by making circumferential-direction lengths of the concave portions on both sides of the pole core portion different from each other; and wherein each of the concave portion is formed in the axial direction of the rotor core, with at least one stepped v-shape skew structure in view of the circumferential direction of the rotor core, so that the pole core portion has at least one stepped v-shape skew structure.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.