WO2023166550A1 - 同期リラクタンスモータの回転子 - Google Patents
同期リラクタンスモータの回転子 Download PDFInfo
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- WO2023166550A1 WO2023166550A1 PCT/JP2022/008574 JP2022008574W WO2023166550A1 WO 2023166550 A1 WO2023166550 A1 WO 2023166550A1 JP 2022008574 W JP2022008574 W JP 2022008574W WO 2023166550 A1 WO2023166550 A1 WO 2023166550A1
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- WIPO (PCT)
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- end plate
- rotor core
- magnetic
- rotor
- ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Definitions
- the present disclosure relates to rotors of synchronous reluctance motors.
- a synchronous reluctance motor obtains rotational force by generating reluctance torque in the rotor using magnetic flux generated by applying current to the stator coil.
- a rotor core that constitutes a rotor of a synchronous reluctance motor is formed in a cylindrical shape by laminating magnetic steel sheets.
- the rotor core of a synchronous reluctance motor has a characteristic saliency shape to increase reluctance torque and improve electrical performance.
- the rotor core has a plurality of flux barriers aligned in the radial direction so as to block magnetic flux in the q-axis direction.
- balance rings are provided on both axially outer sides of a rotor core having a plurality of slits that are flux barriers.
- the balance ring is composed of a first ring made of a magnetic material and a second ring made of a non-magnetic material. .
- the first ring has a cross shape formed so as to avoid the magnetic path between the slits, and is in contact with the rotor core at a portion other than the magnetic path.
- the first ring which is a magnetic material, is in contact with the rotor core. For this reason, in order to suppress leakage flux and eddy current loss of the rotor core, the first ring has a complicated shape such as a cross shape, which causes a problem of increased cost.
- An object of the present invention is to obtain a rotor of a synchronous reluctance motor.
- the rotor of the synchronous reluctance motor of the present disclosure is a cylindrical rotor in which a plurality of magnetic steel plates are laminated and magnetic poles are formed by a plurality of flux barriers arranged in a radial direction.
- the end plate abuts on the rotor core so that one surface overlaps all the magnetic paths having flux barriers on the inner peripheral side of the rotor core, and the other surface abuts on the balance ring.
- the rotor of the synchronous reluctance motor of the present disclosure it is possible to suppress torque reduction and eddy current loss due to leakage flux while suppressing axial deformation in each magnetic path of the rotor iron core at a minimum cost. It has the effect of being able to
- FIG. 2 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1, taken along the line II-II in FIG. 1;
- FIG. 2 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1, and is an enlarged view of section III in FIG. 1;
- FIG. 1 Axial sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1
- FIG. 2 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1, taken along the line II-II in FIG. 1;
- FIG. 2 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1, and is an enlarged view of section III in FIG. 1;
- FIG. 2 is a perspective view showing the configuration of the balance ring, first end plate, and second end plate of the synchronous reluctance motor of Embodiment 1;
- FIG. 7 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 2, taken along line VII-VII in FIG. 6;
- FIG. 1 is an axial sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1.
- FIG. 2 is a sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1, taken along the line II-II in FIG. 3 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 1, and is an enlarged view of section III in FIG. 4 is a perspective view showing the configuration of the balance ring, first end plate, and second end plate of the synchronous reluctance motor of Embodiment 1.
- FIG. 5 is a plan view showing the configuration of the rotor core of the synchronous reluctance motor of Embodiment 1.
- the rotor of the synchronous reluctance motor includes a rotor core 1, a balance ring 2, a first end plate 3, a second end plate 4, and a shaft 7 as a rotor axis. have.
- a stator (not shown) is provided outside the rotor.
- the stator has a stator core (not shown) and coils (not shown) that generate a rotating magnetic field.
- a synchronous reluctance motor obtains rotational force by causing a rotor to generate reluctance torque by a rotating magnetic field generated by applying current to a stator coil.
- the rotor core 1 has a cylindrical shape, and as shown in FIG. 3, a large number of magnetic steel plates 1a are coaxially laminated. Note that the magnetic steel plates 1a may be stacked while being shifted in the direction of rotation by minute angles.
- the rotor core 1 is shrink-fitted to the shaft 7 .
- the rotor core 1 has a plurality of flux barriers 6, as shown in FIGS.
- the plurality of flux barriers 6 are arranged at intervals in the radial direction from the center of rotation of the rotor core 1 toward the periphery of the rotor core 1 .
- Each flux barrier 6 blocks passage of magnetic flux in the rotor core 1 .
- Each flux barrier 6 is a hole penetrating the rotor core 1 in the axial direction.
- a portion of the rotor core 1 other than the flux barrier 6 constitutes a magnetic path 5 including magnetic paths 5a, 5b, 5c, 5d and 5e.
- the rotor core 1 has magnetic poles formed by a plurality of flux barriers 6 arranged in the radial direction.
- disk-shaped magnetic balance rings 2 are arranged.
- Balance adjustment holes 2a extending in the radial direction are provided in the outer peripheral surface of the balance ring 2 for adjusting the rotational balance.
- the axial thickness of the balance ring 2 is ensured so that the balance adjustment hole 2a can be formed.
- the end surface of the balance ring 2 facing the rotor core 1 is provided with ring-shaped and concentric grooves 2b for fixing the first end plate 3 and the second end plate 4.
- 2c is provided.
- a C-shaped ring-shaped first end plate 3 is fitted in the groove 2b, and a C-shaped ring-shaped second end plate 4 is fitted in the groove 2c on the inner peripheral side.
- the first end plate 3 and the second end plate 4 are non-magnetic.
- the first end plate 3 and the second end plate 4 are C-shaped and have an abutment 3a and an abutment 4a which are gaps between the start point and the end point of the ring.
- the outer diameter of the first end plate 3 is made larger than the outer diameter of the groove 2b, and the first end plate 3 is inserted into the groove 2b with the width of the joint 3a compressed so that the diameter of the first end plate 3 is reduced. Therefore, when the compressive force is released, a force is generated to widen the groove portion 2 b and the first end plate 3 is fixed to the balance ring 2 . The same applies to the second end plate 4 on the inner peripheral side.
- the outer diameter of the second end plate 4 is made larger than the outer diameter of the groove 2c. Fixed.
- the first end plate 3 and the second end plate 4 can be easily assembled with the balance ring 2, and the material yield of the first end plate 3 and the second end plate 4 can be increased by forming or the like.
- a high production method can be adopted.
- the first end plate 3 and the second end plate 4 may be formed in a continuous ring shape, in that case, the material yield is deteriorated, and the first end plate 3 in the grooves 2b and 2c is formed in the grooves 2b and 2c. and positioning of the second end plate 4 requires relatively high processing accuracy.
- the joint 3a of the first end plate 3 and the joint 4a of the second end plate 4 are arranged diagonally by 180 degrees. interval is set.
- the first end plate 3 and the second end plate 4 are sandwiched between the balance ring 2 and the rotor core 1 in the axial direction so that the balance ring 2 does not contact the rotor core 1.
- the rotor core 1 generates reluctance torque by limiting the magnetic flux distribution of each magnetic pole by the arrangement of the magnetic path 5 and the flux barrier 6.
- the first end plate 3 is in contact with all the magnetic paths 5a, 5b, 5c, 5d, 5e including the outermost magnetic path 5a in the rotor core 1.
- the innermost magnetic path 5d is the longest, and the magnetic paths 5a, 5b, Out of 5c and 5d, it is most easily deformed in the axial direction.
- the innermost magnetic path 5d abuts on the second end plate 4 at two points so as to be roughly divided into three, and the inner magnetic path 5c also abuts on the second end plate 4 at the central portion. are in contact.
- the balancing ring 2 and the first end plate 3 and the second end plate 4 are in contact with each other over the entire surface of the first end plate 3 and the second end plate 4 when viewed from the axial direction, the rotor core 1 deformation in the axial direction can be effectively suppressed.
- the balance ring 2 is shrink-fitted to the shaft 7 in the same manner as the rotor core 1 while being in contact with the first end plate 3 and the second end plate 4 . In order to more effectively suppress the axial deformation of the rotor core 1, it is desirable that the balance ring 2 applies a residual pressure to the rotor core 1 in the axial direction.
- balance adjustment is performed.
- a rotational imbalance is measured, and a phase and depth balance adjustment hole 2a for offsetting the rotational imbalance is formed in the outer peripheral surface of the balance ring 2 in the radial direction.
- the balance adjustment hole 2a may not be formed if there is no need to adjust the balance, such as when the machining accuracy is high and there is almost no rotation imbalance, or when the rotation speed is low.
- an appropriate fastening force between the balance ring 2 and the shaft 7 is required.
- the balance ring 2 and the shaft 7 require an appropriate interference and fitting surface area.
- the balance ring 2 made of magnetic material is not in contact with the rotor core 1 by the first end plate 3 and the second end plate 4, and the first end plate 3 made of non-magnetic material is not in contact with the rotor core 1.
- the plurality of magnetic paths 5a, 5b, 5c, and 5d having the flux barrier 6 on the inner peripheral side of the rotor core 1 are partially overlapped with all the magnetic paths 5a, 5b, 5c, and 5d. 1, the axial deformation in each magnetic path 5 of the rotor core 1 can be suppressed at a minimum cost, and torque reduction and eddy current loss due to leakage flux can be suppressed. play.
- the magnetic balance ring 2 since the magnetic balance ring 2 does not come into contact with the rotor core 1 through the non-magnetic first end plate 3 and the second end plate 4, in order to suppress leakage magnetic flux and eddy current loss, No complicated shape is required. Therefore, the balance ring 2 may have a simple ring shape, so that the processing cost can be kept low.
- the non-magnetic first end plate 3 contacts the rotor core 1 so as to partially overlap all the magnetic paths 5a, 5b, 5c, 5d having the flux barrier 6 on the inner peripheral side of the rotor core 1.
- Embodiment 2. 6 is an axial sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 2.
- FIG. FIG. 7 is a cross-sectional view showing the configuration of the rotor of the synchronous reluctance motor of Embodiment 2, taken along line VII-VII in FIG.
- the rotor of the synchronous reluctance motor has a rotor core 1, a magnetic balancing ring 12, a non-magnetic end plate 13, and a shaft 7.
- a stator (not shown) is provided outside the rotor.
- the end plate 13 has a disk shape having only a hole to be inserted into the shaft 7, and the balance ring 12 has an outer diameter smaller than that of the disk-shaped end plate 13.
- Rotor core 1 and shaft 7 have configurations similar to those of the first embodiment. That is, the rotor core 1 is formed by coaxially laminating a large number of magnetic steel plates 1 a and is shrink-fitted to the shaft 7 .
- the rotor core 1 has a plurality of flux barriers 6 as shown in FIG. A portion of the rotor core 1 other than the flux barrier 6 constitutes a magnetic path 5 including magnetic paths 5a, 5b, 5c, 5d and 5e.
- disc-shaped end plates 13 are arranged so as to contact the rotor core 1 .
- a balance ring 12 is arranged on the outer side of the end plate 13 in the axial direction so as to abut on the end plate 13 . That is, the balance ring 12 and the end plate 13 overlap in the axial direction.
- Both the balance ring 12 and the end plate 13 have a simple disk shape (doughnut shape) and do not even partially coexist at the same axial position.
- Both the balance ring 12 and the end plate 13 are easy to process because they have a simple disc shape.
- the balance ring 12 is manufactured, for example, by lathe processing using magnetic round steel or cast iron.
- the end plate 13 is manufactured, for example, by laser cutting using a non-magnetic stainless steel plate.
- the end plate 13 may be formed using an aluminum alloy plate or the like instead of the stainless steel plate, as long as the strength and rigidity can be secured. Note that the balance ring 12 or the end plate 13 may be provided with holes or key grooves for functions other than balance adjustment.
- the inner diameters of the rotor core 1, the end plate 13, and the balance ring 12 have values set with an appropriate interference with respect to the outer diameter of the shaft 7, and are shrink-fitted to the shaft 7. .
- Torque is not applied to the end plate 13, and the end plate 13 is sandwiched between the rotor core 1 and the balance ring 12 in the axial direction, so the shrink fitting margin may be relatively small. Therefore, the inner diameter of the end plate 13 may be relatively inaccurate.
- the rotor core 1 is provided with residual pressure in the axial direction by the end plate 13 and the balance ring 12. It is desirable to be in the state of hanging.
- the outer diameter of the end plate 13 is desirably the same as the outer diameter of the rotor core 1. If the outer diameter of the end plate 13 is larger than that of the rotor core 1, it becomes difficult to insert the rotor into the stator when assembling the motor. This is because there is an increased risk that the magnetic steel plates 1a of the rotor core 1 will come into contact with other objects and deform during transportation or handling.
- the balance ring 12 has a smaller outer diameter than the end plate 13.
- the balance ring 12 overlaps the third and fourth magnetic paths 5c and 5d from the outer circumference when viewed from the axial direction, but is arranged so as not to overlap the first and second magnetic paths 5a and 5b from the outer circumference. , abuts on the end plate 13 .
- the reason why the outer diameter of the balance ring 12 is smaller than that of the end plate 13 is to effectively suppress torque reduction and eddy current loss due to leakage magnetic flux. should be as small as possible.
- the end plate 13 has an outer diameter that overlaps the outermost magnetic path 5a in the rotor core 1, and the balance ring 12 has an outer diameter that is smaller than that of the end plate 13. It is desirable to have non-overlapping outer diameters.
- the relationship between the thickness of the magnetic steel plate 1a of the rotor core 1, the thickness of the end plate 13, and the thickness of the balance ring 12 is the thickness of the magnetic steel plate 1a of the rotor core 1 ⁇ 3 ⁇ the thickness of the end plate 13 ⁇ the balance ring. It is desirable to satisfy the thickness of 12/3. That is, it is desirable that the thickness of the end plate 13 is three times or more the thickness of the magnetic steel plate 1a of the rotor core 1 and one-third or less of the thickness of the balance ring 12 .
- the magnetic steel plate 1a of the rotor core 1 has a thickness of 0.5 mm
- the end plate 13 has a thickness of 3.2 mm
- the balance ring 12 has a thickness of 10 mm.
- the axial deformation of the magnetic paths 5 of the rotor core 1 can be suppressed at a minimum cost. , torque reduction and eddy current loss due to leakage flux can be suppressed.
- the magnetic balance ring 12 is not in contact with the rotor core 1 due to the non-magnetic end plate 13 , and the end plate 13 is located on the inner peripheral side of the rotor core 1 . Since it is in contact with the rotor core 1 so as to overlap all the magnetic paths 5a, 5b, 5c, 5d having the flux barriers 6 in the This has the effect of suppressing torque reduction and eddy current loss due to leakage flux while suppressing axial deformation in each magnetic path 5 . Since the balance ring 12 and the end plate 13 have a simple disk shape, the processing cost can be kept extremely low.
- the configuration shown in the above embodiment shows an example of the content of the present disclosure, and can be combined with another known technology. It is also possible to omit or change the part.
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
図1は、実施の形態1の同期リラクタンスモータの回転子の構成を示す軸方向断面図である。図2は、実施の形態1の同期リラクタンスモータの回転子の構成を示す断面図であり、図1のII-II断面図である。図3は、実施の形態1の同期リラクタンスモータの回転子の構成を示す断面図であり、図1のIII部拡大図である。図4は、実施の形態1の同期リラクタンスモータのバランスリング、第1端板、および第2端板の構成を示す斜視図である。図5は、実施の形態1の同期リラクタンスモータの回転子鉄心の構成を示す平面図である。
図6は、実施の形態2の同期リラクタンスモータの回転子の構成を示す軸方向断面図である。図7は、実施の形態2の同期リラクタンスモータの回転子の構成を示す断面図であり、図6のVII-VII断面図である。
Claims (6)
- 径方向に並んだ複数のフラックスバリアによって磁極が形成される複数の磁性鋼板が積層された円筒状の回転子鉄心と、
前記回転子鉄心の軸方向の両端部に配設された、磁性体からなる円板形状のバランスリングと、
軸方向において、前記バランスリングが前記回転子鉄心と当接しないように、前記バランスリングと前記回転子鉄心との間に挟まれる非磁性体の端板と、
を備え、
前記端板は、
一方の面が前記回転子鉄心における内周側にフラックスバリアを持つ全ての磁路に重なるように前記回転子鉄心に当接し、他方の面が前記バランスリングと当接する
ことを特徴とする同期リラクタンスモータの回転子。 - 前記端板は、リング状の第1端板と、前記第1端板より内周側に設けられるリング状の第2端板と、を有し、
前記第1端板は、内周側にフラックスバリアを持つ全ての磁路に一部で重なるように当接し、
前記第2端板は、内周側にフラックスバリアを持つ全ての磁路のうちで最も内周側の磁路と、最も内周側の磁路に内周側に隣接する磁路とに一部で重なるように当接する
ことを特徴とする請求項1に記載の同期リラクタンスモータの回転子。 - 前記第1端板および前記第2端板は、
合口を有するC形状のリング状であり、
前記バランスリングの溝部に、前記バランスリングから突出するように、嵌め込まれる
ことを特徴とする請求項2に記載の同期リラクタンスモータの回転子。 - 前記端板は円板形状であって、前記バランスリングと軸方向に重なっており、同じ軸方向位置で前記バランスリングと共存しない
ことを特徴とする請求項1に記載の同期リラクタンスモータの回転子。 - 前記端板は、前記回転子鉄心における最外周の磁路に重なる外径を有し、
前記バランスリングは、前記端板より小さな外径を有し、最外周のフラックスバリアに重ならない外径を有する
ことを特徴とする請求項4に記載の同期リラクタンスモータの回転子。 - 前記端板の厚みは、前記回転子鉄心の前記磁性鋼板の厚みの3倍以上であり、かつ前記バランスリングの厚みの3分の1以下である
ことを特徴とする請求項4または5に記載の同期リラクタンスモータの回転子。
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CN202280075283.9A CN118235313B (zh) | 2022-03-01 | 2022-03-01 | 同步磁阻电动机的转子 |
PCT/JP2022/008574 WO2023166550A1 (ja) | 2022-03-01 | 2022-03-01 | 同期リラクタンスモータの回転子 |
JP2022552984A JP7183487B1 (ja) | 2022-03-01 | 2022-03-01 | 同期リラクタンスモータの回転子 |
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JP2005176530A (ja) * | 2003-12-12 | 2005-06-30 | Meidensha Corp | 永久磁石形回転電機の回転バランス修正構造 |
JP2015104224A (ja) * | 2013-11-25 | 2015-06-04 | オークマ株式会社 | 同期電動機の回転子 |
JP2018196320A (ja) * | 2017-05-16 | 2018-12-06 | ダイキン工業株式会社 | ロータ |
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JP2011172432A (ja) * | 2010-02-22 | 2011-09-01 | Ee C Ii Tec Kk | 埋込磁石同期モータのロータ |
JP5969946B2 (ja) * | 2013-03-28 | 2016-08-17 | 東芝三菱電機産業システム株式会社 | 同期リラクタンスモータ |
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JP2005176530A (ja) * | 2003-12-12 | 2005-06-30 | Meidensha Corp | 永久磁石形回転電機の回転バランス修正構造 |
JP2015104224A (ja) * | 2013-11-25 | 2015-06-04 | オークマ株式会社 | 同期電動機の回転子 |
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