-
1.发明申请公开(公告)号：US20200251942A1
公开(公告)日：2020-08-06
申请号：US16637275
申请日：2018-09-28
Applicant: NIDEC CORPORATION
Inventor： Tomoya UEDA , Shinji TAKEMOTO , Yusuke ISOGAI
Abstract: According to one aspect of the present disclosure, a rotor includes a shaft, a rotor core including an inner core and a plurality of outer cores, a mold resin unit covering, the mold resin unit, and a plurality of permanent magnets. The mold resin unit includes a gate mark in a region between the outer cores adjacent to each other in the circumferential direction, and the gate mark is provided in all regions between the adjacent outer cores or in a region between the outer cores, the region being adjacent to a region between the even-numbered adjacent outer cores in which the gate mark is not disposed in all the regions between the adjacent outer cores.
-
公开(公告)号：US20200036237A1
公开(公告)日：2020-01-30
申请号：US16497892
申请日：2018-03-08
Applicant: Nidec Corporation
Inventor： Tomoya UEDA
Abstract: A stator of an electric motor includes a multilayer body including annular core sheets stacked in layers. A first annular core sheet includes linking portions, each of which defines a link between tips of two adjacent teeth and includes a seam. A first linking portion provides a link between teeth associated with a U phase. A second linking portion provides a link between teeth associated with a V phase. A third linking portion provides a link between teeth associated with a W phase.
-
公开(公告)号：US20230318375A1
公开(公告)日：2023-10-05
申请号：US18022040
申请日：2020-12-24
Applicant: Nidec Corporation
Inventor： Tomoya UEDA
CPC classification number: H02K1/2766 , H02K1/165
Abstract: A rotor including a pair of first magnets extending in directions away from each other in the circumferential direction as extending from the radially inner side toward the radially outer side when viewed in the axial direction and a second magnet at a circumferential position between the pair of first magnets and extending in a direction orthogonal to the radial direction when viewed in the axial direction. The rotor core includes a pair of holes extending in the axial direction or a pair of groove portions each arranged in the first pattern at the position of the first angle from the d-axis with the d-axis interposed therebetween on an outer peripheral side in the radial direction as viewed in the axial direction and a pair of holes extending in the axial direction or a pair of groove portions each arranged in the second pattern at the second angle.
-
公开(公告)号：US20220158513A1
公开(公告)日：2022-05-19
申请号：US17598874
申请日：2020-01-20
Applicant: NIDEC CORPORATION
Inventor： Tomoya UEDA , Yukie YAMADA
IPC: H02K3/12 , H02K15/085 , H02K1/16
Abstract: Provided is a stator including: a stator core having a plurality of teeth; and a distributed winding coil. The plurality of teeth include a first tooth having an umbrella and a second tooth having no umbrella. The first and second teeth are alternately disposed in a circumferential direction of the stator core. A slot between the first and second teeth adjacent to each other has a radial opening that opens radially. The radial opening has a circumferential width larger than a wire diameter of the coil and smaller than twice the wire diameter of the coil.
-
公开(公告)号：US20200083766A1
公开(公告)日：2020-03-12
申请号：US16469690
申请日：2018-01-12
Applicant: Nidec Corporation
Inventor： Tomoya UEDA
Abstract: A rotor includes a cylindrical rotor core including salient pole portions protruding in a radial direction and extending along a central axis and magnetic pole portions each including a rotor magnet and alternately arranged with the salient pole portions in a circumferential direction of the rotor core on an outer circumferential surface or a radially inner side of the rotor core. The salient pole portions and the magnetic pole portions are magnetic poles of the rotor. Each of the salient pole portions includes, in a cross section perpendicular to the central axis, a salient pole tapered portion at at least one end portion in the circumferential direction, where an outer circumferential surface of the salient pole portion is linearly inclined radially inward from a center to an outer side of the salient pole portion in the circumferential direction.
-
Patent Agency Ranking
公开(公告)号：US20190173366A1
公开(公告)日：2019-06-06
申请号：US16321516
申请日：2017-08-04
Applicant: Nidec Corporation
Inventor： Tomoya UEDA , Yusuke MAKINO
Abstract: A stator core includes an annular core back and teeth extending radially from the core back to a rotor magnet includinq magnets. A ratio of a number of slots, which is equal to a number of the teeth, to a number of poles, which is equal to a number of magnets of the rotor magnet, is 3:4. A slot open ratio, which is a ratio of a slot open angle between two adjacent teeth in a peripheral direction to an angle between center lines of the two teeth is 0.5 or more. When a ratio of a peripheral angle of one magnet to an angle between center positions of two adjacent magnets in the peripheral direction is a magnet ratio, a ratio of the slot open ratio to the magnet ratio is 0.6 to 0.7.
-
公开(公告)号：US20160020653A1
公开(公告)日：2016-01-21
申请号：US14646476
申请日：2013-12-25
Applicant: NIDEC CORPORATION
Inventor： Tomoya UEDA
CPC classification number: H02K1/2773 , H02K1/276 , H02K1/278 , H02K16/005 , H02K2201/06
Abstract: A rotor of an electrical rotating machine includes a first rotor core, a second rotor core which overlaps the first rotor core in an axial direction, a non-magnetic substance layer which is interposed between the rotor cores, and a plurality of permanent magnet portions which are embedded in each rotor core. Each of the rotor cores includes a plurality of flux barrier portions and a plurality of effectual magnetic flux portions which are alternately arranged on an outer circumferential surface thereof. The flux barrier portion of the first rotor core overlaps both of a portion of the flux barrier portion of the second rotor core and a portion of the effectual magnetic flux portion of the second rotor core in the axial direction such that, in the adjacent rotor cores, the effectual magnetic flux portions do not overlap each other in the axial direction.
Abstract translation: 旋转电机的转子包括：第一转子铁心，与第一转子铁芯沿轴向重叠的第二转子铁芯，介于转子铁芯之间的非磁性物质层，以及多个永久磁铁部分， 嵌入每个转子芯中。 每个转子芯包括多个磁通屏障部分和多个有效的磁通部分，其交替地布置在其外圆周表面上。 第一转子铁芯的磁通势垒部分与第二转子铁心的磁通势垒部分的一部分和第二转子铁心的有效磁通部分的一部分沿轴向重叠，使得在相邻的转子铁芯 有效的磁通部在轴向上不重叠。
-
公开(公告)号：US20250062648A1
公开(公告)日：2025-02-20
申请号：US18697000
申请日：2022-06-17
Applicant: NIDEC CORPORATION
Inventor： Yabo HU , Tomoya UEDA
IPC: H02K1/2783
Abstract: A rotor according to one aspect of the present invention is a rotor that is provided to a rotating electrical machine, opposes a stator, and rotates about a central axis line. The rotor includes: a plurality of magnetic pole parts lined along a circumferential direction centered on the central axis line; and a rotor core that supports the magnetic pole parts from one side of a radial direction. The magnetic pole part includes a main magnet whose magnetization direction is the radial direction; and secondary magnets whose magnetization directions are directions tilted in a circumferential direction with respect to the radial direction, the secondary magnets being disposed symmetrically with each other on an outer side of the main magnet in the circumferential direction. At least some of side faces of the secondary magnet extending in the axial direction are flat faces that are parallel or orthogonal to the magnetization direction.
-
公开(公告)号：US20240162764A1
公开(公告)日：2024-05-16
申请号：US18548220
申请日：2022-06-13
Applicant: NIDEC CORPORATION
Inventor： Tomoya UEDA
Abstract: A rotary electric machine includes: a rotor in which a plurality of permanent magnets are embedded in an outer peripheral portion, the rotor being rotatable; a stator fixed around the rotor and provided with a plurality of coils in a stator core; and a motor housing that accommodates the rotor and the stator therein. The stator is fixed to the motor housing by a bolt (fastener) inserted into a plurality of fixing portions protruding radially outward from an outer periphery of the stator core, and a flux barrier penetrating in an axial direction is formed near the fixing portion of the stator core and at a position not overlapping the fixing portion in a radial direction. Here, the fixing portions are disposed at equiangular pitches in the circumferential direction of the stator core, and the flux barriers are formed on both sides of the fixing portion in a circumferential direction.
-
公开(公告)号：US20220255378A1
公开(公告)日：2022-08-11
申请号：US17666506
申请日：2022-02-07
Applicant: NIDEC CORPORATION
Inventor： Tomoya UEDA , Toshiyuki SASAKI , Yabo HU
Abstract: A rotor includes: a shaft; a tubular rotor core; and a plurality of magnets. The shaft extends along a center axis. The rotor core surrounds the shaft. The plurality of magnets is disposed outside the rotor core in a radial direction and is aligned in a circumferential direction. A plurality of first recessed portions recessed outward in the radial direction is aligned in the circumferential direction in an inner surface of the rotor core in the radial direction. Each of the first recessed portions overlaps each of the magnets in the radial direction.
-
-
-
-
-
-
-
-
-
Search Results
30
records
(took 0.016 seconds)
