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公开(公告)号：US20220416630A1
公开(公告)日：2022-12-29
申请号：US17777991
申请日：2020-11-04
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kenichi NAKAYAMA , Akira TOBA , Hiromitsu OKAMOTO , Teruaki HIGUCHI , Zhi JING , Satoshi YAMAMURA
Abstract: The reliability of a rotating electrical machine is improved. A method for manufacturing a stator used in a rotating electrical machine includes: a first step of arranging a first segment coil and a second segment coil to face each other; a second step of processing the first segment coil to generate a bridge part that comes into contact with the second segment coil; and a third step of joining the bridge part and the second segment coil by laser welding.
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公开(公告)号：US20210384787A1
公开(公告)日：2021-12-09
申请号：US17282459
申请日：2019-09-04
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiromitsu OKAMOTO , Kenichi NAKAYAMA , Kenji NAKAYAMA , Toshiyuki TAKANO , Yoshio OZEKI , Hideaki KOBAYASHI
Abstract: An object of the present invention is to improve the reliability of a rotating electric machine. A stator of a rotating electric machine includes a stator core on which teeth and slots are provided on a cylindrical inner surface, a plurality of windings arranged inside the slot, and slot liners disposed between an inner wall of the slot and the plurality of windings. Each of the plurality of windings has a first surface formed along a radial direction of the stator core and a second surface formed along a circumferential direction, the slot has a first inner wall facing the first surface, and a second inner wall facing the second surface, an adhesive layer expanded by processing is formed on a front surface of the slot liner, when an area of the first surface is larger than an area of the second surface, a distance between the first surface and the first inner wall is smaller than a distance between the second surface and the second inner wall, and when the area of the first surface is smaller than the area of the second surface, the distance between the first surface and the first inner wall is larger than the distance between the second surface and the second inner wall.
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公开(公告)号：US20240006941A1
公开(公告)日：2024-01-04
申请号：US18252784
申请日：2021-08-31
Applicant: HITACHI ASTEMO, LTD.
Inventor： Zhi JING , Shinji YAMAZAKI , Hiromitsu OKAMOTO , Akira FUJIWARA , Ryuta KINOSHITA , Hiroki NARUSHIMA , Keiichiro MARUYAMA
IPC: H02K1/32
CPC classification number: H02K1/32
Abstract: A rotor for a rotary electric machine includes: a rotor core; a shaft that is hollow and that supports the rotor; and an end plate that is disposed on an end of the rotor in a rotational axis direction, and that forms a passage through which a refrigerant flows, between the end plate and the rotor core, in which the end plate includes a plurality of ribs that come into contact with the shaft, the passage includes a refrigerant entry portion that is provided between the plurality of ribs, and a refrigerant exit portion that communicatively connects the refrigerant entry portion to an outer peripheral surface of the end plate, the shaft has a refrigerant supply hole communicatively connecting the refrigerant entry portion to internal of the shaft, and a circumferential length of the refrigerant entry portion along an innermost diameter is larger than a circumferential length of the refrigerant supply hole.
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Patent Agency Ranking
公开(公告)号：US20230268783A1
公开(公告)日：2023-08-24
申请号：US18041116
申请日：2021-07-16
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kenichi NAKAYAMA , Satoshi YAMAMURA , Shuhei YAMASHITA , Hiroshi AOKI , Akihito TOYA , Mohdbasir ZULAIKA , Hiromitsu OKAMOTO , Zhi JING , Akira TOBA
Abstract: Provided is a stator core of a rotating electrical machine in which a core back and teeth are formed by laminating a plurality of thin steel plates with an adhesive interposed therebetween. The stator core includes a first stator core that is formed by applying the adhesive to a first region covering the core back and the teeth between the plurality of thin steel plates, and a second stator core that is formed by applying the adhesive to a second region, which has an area smaller than an area of the first region, between the plurality of thin steel plates. The first stator core is disposed at least at one end of the stator core in a laminating direction of the thin steel plates.
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公开(公告)号：US20230045248A1
公开(公告)日：2023-02-09
申请号：US17790366
申请日：2020-12-11
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiromitsu OKAMOTO , Yoshio OZEKI , Kenichi NAKAYAMA , Satoshi YAMAMURA , Zhi JING
Abstract: Reliability of a rotating electrical machine is enhanced. A stator of a rotating electrical machine includes: a stator core being provided with teeth and slots on a cylindrical inner side surface of the stator core; a plurality of winding wires being each arranged inside each of the slots; and slot liners being each arranged respectively between an inner wall of each of the slots and each of the plurality of winding wires, each of the slot liners has a sheet-like first insulating substrate, a second insulating material layer being disposed on at least one surface of each of the slot liners, and an adhesive layer which expands between the first insulating substrate and the second insulating material layer by processing, the second insulating material layer is provided with a through-hole which communicates a side of the first insulating substrate with the inner wall of each of the slots, and each of the slot liners is disposed inside each of the slots in such a way that the second insulating material layer is provided on a side closer to the inner wall of each of the slots than the first insulating substrate.
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公开(公告)号：US20230216378A1
公开(公告)日：2023-07-06
申请号：US18009134
申请日：2021-02-05
Applicant: HITACHI ASTEMO, LTD.
Inventor： Zhi JING , Satoshi YAMAMURA , Kenichi NAKAYAMA , Tomohiro ADACHI , Shinji YAMAZAKI , Hiromitsu OKAMOTO , Yuuki TAKAHASHI
Abstract: To suppress non-uniformness in an adhesion range of a refrigerant to a coil end. A rotating electric machine includes a rotor, a stator, and a case. The case forms outflow holes 122A and 122B through which the refrigerant flows out toward an extra-slot conductor 139 of a stator coil. In a state in which a case 110 is installed such that a rotation center axis Ca is horizontal, the outflow holes 122A and 122B are arranged above the extra-slot conductor 139, and when the bending direction of the extra-slot conductor with respect to an intra-slot conductor arranged on the outermost diameter side in a slot in the stator coil on an upper portion of the stator is a coil bending direction Da, the first outflow hole 122A is arranged on the bending direction Da side with respect to a vertical line VL passing through the rotation center axis Ca, and the second outflow hole 122B is arranged on a side opposite to the bending direction Da with respect to the vertical line VL, and the arrangement angle θb of the second outflow hole 122B with reference to the vertical line VL is larger than the arrangement angle θa of the first outflow hole 122A with reference to the vertical line VL.
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公开(公告)号：US20220239176A1
公开(公告)日：2022-07-28
申请号：US17613544
申请日：2020-05-29
Applicant: HITACHI ASTEMO, LTD.
Inventor： Kenichi NAKAYAMA , Hiromitsu OKAMOTO , Satoshi YAMAMURA , Tomohiro ADACHI
Abstract: An object of the present invention is to efficiently cool a rotor coil even in a rotor provided with a wire connection plate. A stator of a rotating electric machine includes a stator core, a plurality of segment coils protruding from slots of the stator core and arranged in a radial direction, a connection conductor that connects the segment coils, and an insulating member that holds the connection conductor. The insulating member includes a through hole through which the segment coil penetrates and is accommodated. An opening through which a coolant can flow into the through hole is provided on an inner peripheral side of the insulating member.
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公开(公告)号：US20220216753A1
公开(公告)日：2022-07-07
申请号：US17605330
申请日：2020-04-10
Applicant: Hitachi Astemo, Ltd.
Inventor： Hiromitsu OKAMOTO , Kenichi NAKAYAMA , Satoshi YAMAMURA , Tomohiro ADACHI , Shinji YAMAZAKI
Abstract: An object of the present invention is to firmly fix a magnet at a predetermined position of a magnet insertion portion. A rotor for a rotary electric machine includes: a rotary shaft; at least one magnet; a rotor core having at least one magnet housing inside which the at least one magnet is attached; and at least one fixing member disposed inside the at least one magnet housing to fix the at least one magnet, wherein the at least one fixing member includes: a first fixing portion that is in contact with a side surface of the at least one magnet in a radial direction of the rotary shaft or in contact with a side surface of the at least one magnet in a circumferential direction of the rotary shaft; and a second fixing portion that is in contact with an end face of the at least one magnet in an axial direction of the rotary shaft. The first fixing portion and the second fixing portion are connected to each other at an angle smaller than 90 degrees, and the at least one fixing member is inserted, together with the at least one magnet, in the at least one magnet housing and presses the at least one magnet against an inner wall of the at least one magnet housing due to an increase in the angle between the first fixing portion and the second fixing portion.
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