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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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Patent Agency Ranking
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：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：US20240250571A1
公开(公告)日：2024-07-25
申请号：US18559851
申请日：2022-02-15
Applicant: HITACHI ASTEMO, LTD.
Inventor： Yuki KUMADA , Kenichi NAKAYAMA , Satoshi YAMAMURA , Zhi JING , Mohdbasir ZULAIKA , Akihito TOYA , Akira TOBA
CPC classification number: H02K3/28 , H02K1/16 , H02K2203/06
Abstract: A stator for a rotating electric machine includes: a stator core provided with slots arranged in a circumferential direction such that the slots are formed in two or more layers in a radial direction; and coils each having an inserted portion positioned inside the slots, and terminal end portions protruding from one end side and another end side of the stator core in an axial direction; wherein the coils include first coils formed to have a straight-line shape at their terminal end portions, second coils inclined in the circumferential direction at a predetermined angle with respect to an end face of the stator core at the one end side or the other end side of the terminal end portions, and third coils inclined in the circumferential direction at a predetermined angle with respect to the end face of the stator core at the one end side and the other end side of the terminal end portions, and the first coils, the second coils, and the third coils are connected to each other at their respective end portions to form a multiple winding.
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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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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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