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1. 发明公开

EP4321363A1 ELECTRIC WHEEL SYSTEM 审中-实审
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.

2. 发明公开

EP4131763A1 POWER CONVERSION DEVICE 审中-实审
公开(公告)号：EP4131763A1
公开(公告)日：2023-02-08
申请号：EP20927721.9
申请日：2020-12-03
申请人： Hitachi, Ltd.
发明人： ASAI, Kyota
IPC分类号： H02M7/48 , H01L23/473 , H01L25/07 , H01L25/18
摘要： This power conversion device comprises: a power module which converts direct current power into alternating current power; a substrate on which the power module is disposed and which includes a direct current path for transmitting the direct current power to the power module, the substrate having a first surface, a second surface directly facing the first surface, and a plurality of main flow path holes penetrating the second surface from the first surface; and a flow path forming body which forms at least a portion of the first surface and the second surface of the substrate so as to cover the plurality of main flow path holes, and which forms a flow path for a refrigerant that cools the power module, wherein the plurality of main flow path holes are disposed in position traversing the direct current path, and the refrigerant moves from the first surface to the second surface through the main flow path holes.

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