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1. 发明公开

EP4322381A1 ROTARY ELECTRICAL MACHINE 审中-公开
公开(公告)号：EP4322381A1
公开(公告)日：2024-02-14
申请号：EP22815836.6
申请日：2022-05-17
申请人： Hitachi, Ltd.
发明人： IWANO, Ryuuichirou , SUTO, Tetsuya
IPC分类号： H02K9/197 , H02K3/24 , H02K9/19 , H02K11/33
摘要： The purpose of the present invention is to provide a rotary electrical machine which makes it possible to improve cooling performance without impairing reliability in structural strength. A stator 1 of a rotary electrical machine 100 comprises a stator core 17, a coil 19, and at least one of a connection wire 12 and a jumper wire 13. The coil 19 has a first coil end 10 which is located on one end side of the stator core 17 in the axial direction and a second coil end 11 which is located on the other end side of the stator core 17 in the axial direction. A coolant flow path for cooling the rotor 2 and the stator 1 has: a coolant inflow port 15; a first annular flow path 8 which faces an air gap 3 in the axial direction; a relay flow path 18 which is provided on the second coil end 11 side and which faces the air gap 3 in the axial direction; and a second annular flow path 9 which is in communication with the relay flow path 18 and which is provided as shifted radially outward with respect to the air gap 3. The connection wire 12 and the jumper wire 13 of the coil 19 are provided in the first annular flow path 8.

2. 发明公开

EP4269146A1 ROTATING ELECTRICAL MACHINE, ELECTRIC WHEEL, AND VEHICLE 审中-公开
公开(公告)号：EP4269146A1
公开(公告)日：2023-11-01
申请号：EP21909922.3
申请日：2021-10-20
申请人： Hitachi, Ltd.
发明人： TAKAHASHI, Akeshi , SUTO, Tetsuya , ITO, Makoto
IPC分类号： B60K7/00 , H02K3/04 , H02K3/50 , B60K1/00
摘要： 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.

3. 发明公开

EP4344030A1 ROTARY ELECTRICAL MACHINE 审中-公开
公开(公告)号：EP4344030A1
公开(公告)日：2024-03-27
申请号：EP22861072.1
申请日：2022-08-01
申请人： Hitachi, Ltd.
发明人： SUTO, Tetsuya , TAKAHASHI, Akeshi , ITO, Makoto
IPC分类号： H02K3/18 , B60K7/00
摘要： A rotary electrical machine (100) comprises a cylindrical stator (130) that generates a magnetic field, a rotor (150) that generates torque through the magnetic field, and a housing (101) that accommodates the stator. The housing comprises a housing body (110) covering an outer circumferential part of the stator, and a housing lid part (120) attached to one end side of the housing body. The stator comprises a stator core (131) having a plurality of teeth, and a stator coil (140) mounted on the stator core, and the stator coil has a plurality of windings (141) wound onto the plurality of teeth, and a crossover wire (170) connecting at least two of the plurality of windings. The crossover wire (170) comprises an insertion mechanism (180) that is provided to the housing lid part (120) and electrically connects end parts of the windings (141) and an end part of the crossover wire (170) through insertion contact.

4. 发明公开

EP4321363A1 ELECTRIC WHEEL SYSTEM 审中-公开
公开(公告)号：EP4321363A1
公开(公告)日：2024-02-14
申请号：EP22837383.3
申请日：2022-06-07
申请人： Hitachi, Ltd.
发明人： ASAI, Kyota , NAMBA, Akihiro , SUTO, Tetsuya , TAKAHASHI, Akeshi
IPC分类号： B60K7/00 , B60G7/00
摘要： An electric wheel system (1000) comprises: an electric wheel part (100) including a motor (20) and an inverter (10); a first arm which connects the bottom side of the electric wheel part and a vehicle body; and a second arm which connects the top side of the electric wheel part and the vehicle body. A motor housing (24) includes a first arm connecting part (25) connected to the first arm and a second arm connecting part (26) connected to the second arm. The inverter is disposed at a position overlapping a line segment connecting the first arm connecting part and the second arm connecting part. The motor housing includes a first fan-shaped area (1) with a central angle of 120° centered on the rotation axis of a rotor and a second fan-shaped area (2) with a central angle of 240° centered on the rotation axis of the rotor. The first arm connecting part is disposed in the first fan-shaped area disposed on the bottom side of the motor housing. Electrical connecting parts (15U, 15V, 15W) between the inverter and the motor are disposed in the second fan-shaped area disposed on the top side of the motor housing.

5. 发明公开

EP4318888A1 STATOR FOR DYNAMO-ELECTRIC MACHINE, DYNAMO-ELECTRIC MACHINE, ELECTRIC DRIVE SYSTEM, AND ELECTRICALLY POWERED WHEEL 审中-公开
公开(公告)号：EP4318888A1
公开(公告)日：2024-02-07
申请号：EP22779373.4
申请日：2022-01-14
申请人： Hitachi, Ltd.
发明人： SUTO, Tetsuya , TAKAHASHI, Akeshi , ITO, Makoto
IPC分类号： H02K3/18 , H02K11/30
摘要： 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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