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公开(公告)号：US20240097524A1
公开(公告)日：2024-03-21
申请号：US18267286
申请日：2021-11-25
Applicant: Hitachi, Ltd.
Inventor： Akeshi TAKAHASHI , Tetsuya SUTO , Makoto ITO
CPC classification number: H02K5/203 , B60K7/0007 , H02K5/165 , H02K9/197 , H02K2209/00
Abstract: This rotating electric machine comprises: a stator having a stator core around which a plurality of coils are wound; a rotor supported to be rotatable relative to the stator with a predetermined gap therebetween; a rotor case that holds the rotor; and a first bearing and a second bearing that rotatably support the rotor case. The rotating electric machine includes: a first flow path formation body that forms a first flow path through which a refrigerant flows to a coil end part protruding from the stator core; a first case part which forms an accommodation space of the first bearing, is connected to the first flow path of the first flow path formation body, and fills the accommodation space with the refrigerant; a second flow path formation body which forms a second flow path through which the refrigerant flows to a coil end part disposed on the opposite side from the coil end part in the axial direction; and a second case part which forms an accommodation space of the second bearing, is connected to the second flow path of the second flow path formation body, and fills the accommodation space with the refrigerant.
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公开(公告)号：US20240322628A1
公开(公告)日：2024-09-26
申请号：US18578362
申请日：2022-08-01
Applicant: Hitachi, Ltd.
Inventor： Tetsuya SUTO , Akeshi TAKAHASHI , Makoto ITO
CPC classification number: H02K3/28 , H02K1/16 , H02K5/203 , B60K7/0007 , H02K2203/09
Abstract: A rotary electrical machine comprises a cylindrical stator that generates a magnetic field, a rotor that generates torque through the magnetic field, and a housing that accommodates the stator. The housing comprises a housing body covering an outer circumferential part of the stator, and a housing lid part attached to one end side of the housing body. The stator comprises a stator core having a plurality of teeth, and a stator coil mounted on the stator core, and the stator coil has a plurality of windings wound onto the plurality of teeth, and a crossover wire connecting at least two of the plurality of windings. The crossover wire comprises an insertion mechanism that is provided to the housing lid part and electrically connects end parts of the windings and an end part of the crossover wire through insertion contact.
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3.发明公开公开(公告)号：US20240162761A1
公开(公告)日：2024-05-16
申请号：US18281729
申请日：2022-01-14
Applicant: Hitachi, Ltd.
Inventor： Tetsuya SUTO , Akeshi TAKAHASHI , Makoto ITO
CPC classification number: H02K1/16 , B60K7/0007 , H02K3/28 , B60K2007/0061 , H02K2213/03
Abstract: The purpose of the present invention is to provide: a stator for a dynamo-electric machine, with which axial size can be reduced; and, an electrically powered wheel provided with the stator for the dynamo-electric machine. A stator 10 for a dynamo-electric machine is provided with a stator core 100, a plurality of coils 201A-201D, and jumper wires 202A-202C. The stator core 100 has first teeth 101 around which a coil is wound and second teeth 102 around which a coil is not wound. The first teeth 101 and the second teeth 102 are disposed alternatingly in the circumferential direction. The jumper wire 202 extends circumferentially and radially with a bent section to absorb variations in the spacing between one coil and another, and is disposed at a position overlapping the second teeth 102 when viewed from the axial direction of the dynamo-electric machine. Further, the jumper wire 202 is disposed closer to the stator core 100 relative to an axial end of a coil at least partially wound around the first teeth 101.
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公开(公告)号：US20240253447A1
公开(公告)日：2024-08-01
申请号：US18292549
申请日：2022-07-15
Applicant: Hitachi, Ltd.
Inventor： Tetsuya SUTO , Akeshi TAKAHASHI , Makoto ITO
CPC classification number: B60K7/0007 , H02K1/16 , H02K7/102 , H02K9/19
Abstract: An in-wheel motor with improved driving force has a simplified cooling structure for the motor and a braking device. The in-wheel motor has a motor that transmits motive power to a wheel, at least a portion of the motor being disposed inside the wheel; a first cooling part and a second cooling part that cool a stator of the motor; and a braking device that applies braking to the wheel. The braking device 25 is formed from a brake disc that rotates with the wheel and a brake caliper that induces braking by imparting friction to the brake disc. The brake caliper operates in the axial direction of the motor to induce braking in the brake disc. A portion of an axial-direction end of the brake caliper is in contact with the stator. The first cooling part and the second cooling part cool the braking device through the stator.
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Patent Agency Ranking
公开(公告)号：US20240039355A1
公开(公告)日：2024-02-01
申请号：US18039772
申请日：2021-10-20
Applicant: Hitachi, Ltd.
Inventor： Akeshi TAKAHASHI , Tetsuya SUTO , Makoto ITO
CPC classification number: H02K3/28 , H02K15/0407 , H02K15/0081 , B60L50/51 , B21D28/26 , B60L2210/40
Abstract: A rotating electrical machine according to the present invention has a plurality of segmented coils respectively disposed in a plurality of layers aligned in a row in a radial direction inside a slot of a stator core. The segmented coils comprise: first regions (111a, 121a) that each have a straight line section disposed inside the slot and a protrusion that protrudes to the outside of the slot from one end of the straight line section; and second regions (112a, 122a) that are formed so as to extend toward one side in the circumferential direction from the other end of the respective straight line section, and such that the position in the radial direction changes. The tip end section of the second region (112a) of a first segmented coil (110a) disposed in a prescribed layer within a prescribed slot is disposed and connected so as to be adjacent, in the radial direction, to the tip end section of the first region (121a) of a second segmented coil (120a) disposed in the prescribed layer within a slot adjacent to the prescribed slot.
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公开(公告)号：US20230268790A1
公开(公告)日：2023-08-24
申请号：US18020206
申请日：2021-05-25
Applicant: Hitachi, Ltd.
Inventor： Makoto ITO , Tetsuya SUTO , Akeshi TAKAHASHI
Abstract: A rotary electric machine (100) comprising, in order to increase a torque density, a stator (101) and a rotor (102) provided so as to be rotatable about the axial center (C), wherein: phase coils (120G) each having a substantially rectangular coil-cross-section are arranged in a row in the radial direction in a slot (110) so as to constitute a plurality of layers; the phase coils (120G) are each wound over a group of three or more slots (110) which are contiguously arranged in the circumferential direction; identical-phase slots (111) are provided on each of which only a combination of phase coils (120G) of an identical phase are arranged; different-phase slots (112) are provided on each of which only a combination of phase coils (120G) of two different phases are arranged; and the different-phase slots (112) are disposed one by one so as to be adjacent to respective two sides of sets of identical-phase slots (111) comprising at least two slots arranged contiguously in the circumferential direction.
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公开(公告)号：US20250033459A1
公开(公告)日：2025-01-30
申请号：US18580134
申请日：2022-06-29
Applicant: Hitachi, Ltd.
Inventor： Tetsuya SUTO , Akeshi TAKAHASHI , Makoto ITO
Abstract: This invention provides an in-wheel motor capable of increasing steering operability and ride comfort of a vehicle. A stator 21 of an in-wheel motor 20 comprises a stator housing 21a and a stator housing cover 21b. The stator housing 21a is formed of a tubular-shaped housing annular portion 21a1, a housing flat-plate portion 21a2, a fold-back portion 21a3, and a flange portion 21a4. In the stator housing 21a, a housing recessed portion 211 is formed of the housing flat-plate portion 21a2 and the fold-back portion 21a3. The housing recessed portion 211 is provided with a hub bearing mounting portion 216 on which a hub bearing 26 is mounted. The stator housing cover 21b is provided with an upper arm attachment portion 217 and a lower arm attachment portion 218 for attaching an upper arm 31 and a lower arm 32 of a suspension device 30.
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公开(公告)号：US20240097525A1
公开(公告)日：2024-03-21
申请号：US18289410
申请日：2022-05-17
Applicant: Hitachi, Ltd.
Inventor： Ryuuichirou IWANO , Tetsuya SUTO
Abstract: A stator of a rotary electrical machine includes a stator core, a coil, and at least one of a connection wire and a jumper wire. The coil has a first coil end which is located on one end side of the stator core in the axial direction and a second coil end which is located on the other end side of the stator core in the axial direction. A coolant flow path for cooling the rotor and the stator has: a coolant inflow port; a first annular flow path which faces an air gap in the axial direction; a relay flow path which is provided on the second coil end side and which faces the air gap in the axial direction; and a second annular flow path which is in communication with the relay flow path and which is provided as shifted radially outward with respect to the air gap.
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9.发明公开公开(公告)号：US20230223808A1
公开(公告)日：2023-07-13
申请号：US17927374
申请日：2021-05-13
Applicant: HITACHI, LTD.
Inventor： Tetsuya SUTO , Akeshi TAKAHASHI , Makoto ITO
IPC: H02K3/04 , H02K15/085
CPC classification number: H02K3/04 , H02K15/085
Abstract: The present invention addresses the problem of providing a winding for an electromagnetic component, a stator for a rotary electric machine, a rotary electric machine, and a wheel, which can simplify an assembly step while improving joint quality of a coil end. This winding for electromagnetic components comprises a first conductor (3) and a second conductor (4) electrically connected to the first conductor (3). The first conductor (3) and the second conductor (4) are fixed inside an electromagnetic component. At least one among the first conductor (3) and the second conductor (4) has a bent section (10). The first conductor (3) is pressed against and makes close contact with the second conductor (4) by a restoring force (12) due to residual stress of the bent section (10).
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