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公开(公告)号：US20190036387A1
公开(公告)日：2019-01-31
申请号：US16072005
申请日：2016-11-29
发明人： Moriyuki HAZEYAMA , Junji KITAO , Yoshihiro MIYAMA , Shogo OKAMOTO , Shinji NISHIMURA , Ryuichi KITORA , Ryuji KITAMURA , Hitoshi ISODA
摘要： In a rotary electric machine, slots are formed between teeth of a stator core. A ratio of a number of poles to a number of slots is 2:3. When an electrical angle of a tooth tip width, which is a width dimension of a tip of each of the teeth in a circumferential direction of the stator, is represented by α, an electrical angle of a pole arc angle, which is an angle formed by two straight lines that connect a rotation center of a rotor to corners on a rotor surface side of one permanent magnet, is represented by β, and a number of pole pairs is represented by P, the tooth tip width is within a range of (electrical angle)±0.2°×P for a value that satisfies the following expression: β=−2.5α+319.7 (0
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公开(公告)号：US20170346353A1
公开(公告)日：2017-11-30
申请号：US15538065
申请日：2015-11-18
CPC分类号： H02K1/16 , H02K1/146 , H02K1/276 , H02K1/2766 , H02K29/03 , H02K2201/06 , H02P21/06 , H02P21/141 , H02P25/22 , H02P27/06 , H02P29/662
摘要： Given a first intersection point of the surface of a rotor and a straight line that joins a central point of a permanent magnet on a stator side and a tooth tip section closest to the central point of the permanent magnet on the stator side, a flange is formed outward of an arc having, as the radius thereof, a distance from a second intersection point of the inner peripheral face of the stator and a straight line that joins the rotation axis of the rotor and the first intersection point, up to the tooth tip section.
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公开(公告)号：US20240088752A1
公开(公告)日：2024-03-14
申请号：US17766744
申请日：2020-07-31
发明人： Yusuke KIMOTO , Tadashi MURAKAMI , Junji KITAO
IPC分类号： H02K9/19 , H02K1/2706 , H02K7/116 , H02K9/22
CPC分类号： H02K9/19 , H02K1/2706 , H02K7/1163 , H02K9/227
摘要： Provided is a rotating electric machine in which the coolant is efficiently circulated, thus having improved cooling performance. A rotating electric machine has a coolant pump-up mechanism provided with a motive-power transmission mechanism for transmitting rotational motive power of a rotor and an impeller which rotates via the motive-power transmission mechanism and efficiently pumps up a coolant. The motive-power transmission mechanism is provided at one end of a first shaft forming a rotation axis of the rotor and one end of a second shaft forming a rotation axis of the impeller and crossing the axial-length direction of the first shaft. In the coolant pump-up mechanism, a heat exchanger for cooling a coolant is provided at a lower part of the impeller, and through rotation of the rotor, the impeller supplies the coolant cooled by the heat exchanger to the first shaft side, thereby cooling a stator and the rotor.
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公开(公告)号：US20230246536A1
公开(公告)日：2023-08-03
申请号：US18008667
申请日：2020-12-01
发明人： Kodai OKAZAKI , Junji KITAO , Yoshihiro MIYAMA
IPC分类号： H02K49/10
CPC分类号： H02K49/102
摘要： In the magnetic flux modulation type magnetic gear which uses pole pieces, improvement in demagnetization resistance and suppression of the reduction in torque were issues. Therefore, to the pole pieces provided in a torus shape, a magnetic flux modulation type magnetic gear arranges concentrically a first rotator on the inside of the pole piece and a second rotator on the outside, so that the rotors can be rotated relatively, with the center of the pole pieces as the rotation axis, wherein a first hole part stores, on the inside of the rotator, a first permanent magnet prepared in the rotator, having inclination of a predetermined angle, with respect to the line segment which shows a magnetic pole center, when viewed from the rotation axis. The magnetic gear is configured so as to use the amount of permanent magnets as much as possible.
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公开(公告)号：US20230123457A1
公开(公告)日：2023-04-20
申请号：US17851243
申请日：2022-06-28
摘要： The rotary electric machine includes: a rotor core configured having electromagnetic steel sheets; a stator core having electromagnetic steel sheets; a magnet inserted in each of a plurality of through holes; and a magnetic end plate in contact with one or each of an end surface on one side in the axial direction of the rotor core and an end surface on another side in the axial direction of the rotor core, and having a single magnetic sheet or a plurality of magnetic sheets stacked in the axial direction, wherein heat generated from the magnetic end plate owing to eddy current that is generated in the magnetic end plate by magnetic flux from the stator core is equal to or lower than heat generated from the rotor core owing to eddy current that is generated in the rotor core by magnetic flux from the stator core.
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公开(公告)号：US20240283310A1
公开(公告)日：2024-08-22
申请号：US18571260
申请日：2021-08-23
发明人： Yu HIRAI , Junji KITAO , Tatsuo NISHIMURA
CPC分类号： H02K1/2766 , H02K11/012
摘要： Provided is a rotor that enables reduction in iron loss due to harmonics. One magnetic pole is formed by arranging three or more magnetic-pole layers each having a pair of V-shaped magnet slots and permanent magnets. An angle between a q axis and a line parallel to a magnetic-flux output surface of the permanent magnet is defined as a magnetic-pole-layer angle. The magnetic-pole-layer angles in one magnetic pole become smaller as the magnetic-pole layers become closer to a rotary shaft. A shortest distance from the magnet slot to the outer circumferential surface of a rotor core is defined as a bridge width and a shortest distance between the adjacent magnetic-pole layers is defined as a magnetic-pole-layer interval. The magnetic-pole-layer interval is set to be smaller than a sum of the bridge widths of the adjacent magnetic-pole layers.
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公开(公告)号：US20230179043A1
公开(公告)日：2023-06-08
申请号：US17921154
申请日：2021-03-05
发明人： Junji KITAO , Yu HIRAI
IPC分类号： H02K1/276
CPC分类号： H02K1/2766
摘要： A rotor core includes: a bypass barrier which is a nonmagnetic region provided on the q-axis; a first magnet provided in a region of the rotor core that is closer to the d-axis than the q-axis is; and a second magnet at least a portion of which is provided in a region, of the rotor core, on a radially inner side relative to the first magnet. The second magnet is provided in a region of the rotor core that is closer to the q-axis than the first magnet is. An end point of the second magnet that is closest to the q-axis is located on the radially inner side, in the rotor core, relative to a radially innermost surface which is a surface on a radially innermost side of the bypass barrier.
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公开(公告)号：US20180233973A1
公开(公告)日：2018-08-16
申请号：US15752941
申请日：2016-09-14
CPC分类号： H02K1/2766 , H02K1/02 , H02K1/16 , H02K1/22 , H02K1/27 , H02K21/14 , H02K2213/03
摘要： A rotary electric machine, in which α>β is established when the teeth portion has a width α in a circumferential direction thereof, a rotation center of the rotor and one of corners, which is on a rotor surface side, on both ends of each of the permanent magnets are connected by a straight line, a center between an N-pole and an S-pole of the permanent magnets is on a q-axis, and an angle formed by two straight lines on the q-axis side is β, a first bridge part is provided between a flux barrier provided at the rotor core and the rotor surface, and γ>δ is established when the first bridge part has a minimum width γ, and the flux barrier has a minimum width δ on the q-axis.
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公开(公告)号：US20230120571A1
公开(公告)日：2023-04-20
申请号：US17887691
申请日：2022-08-15
发明人： Kodai OKAZAKI , Junji KITAO , Yoshihiro MIYAMA , Kengo KUMAGAI
IPC分类号： H02K1/276
摘要： A rotary electric machine comprises: a rotor which has a rotor core and permanent magnets arranged in the rotor core on its outer circumference side, and which is supported rotatably; and a stator which has a stator core having teeth projecting toward a radial center and arranged circumferentially, and which is located coaxially with the rotor to be spaced apart from the outer circumferential surface of the rotor; wherein, on a condition that a ratio of the circumferential width of each of sub poles to the circumferential width of each of main poles is 0.625 or less, a top width of each of the teeth is set on the basis of two calculation formulas to be used differently according to the rotor skew angle.
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公开(公告)号：US20220320924A1
公开(公告)日：2022-10-06
申请号：US17572008
申请日：2022-01-10
发明人： Shinsuke KAYANO , Tatsuo NISHIMURA , Junji KITAO , Hitoshi ISODA
摘要： In a rotor in which magnet slots arranged in a V shape so as to open toward the outer circumferential side and having permanent magnets inserted therein are formed in a two-layer structure in a radial direction, the magnet slots in each layer are composed of a pair of slots formed between a center bridge located at the center and respective ones of two radially-outer bridges located between the outer surface of the rotor and the respective slots. Of magnetic fluxes generated from the permanent magnets, magnetic fluxes excluding magnetic fluxes for magnetically saturating the bridges are defined as effective magnetic fluxes. The rotor is configured such that the effective magnetic flux generated from the permanent magnet on the radially outer side is not greater than half the effective magnetic flux generated from the permanent magnet on the radially inner side.
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