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公开(公告)号:US20240275297A1
公开(公告)日:2024-08-15
申请号:US18564819
申请日:2022-03-02
Applicant: Hitachi Astemo, Ltd.
Inventor: Takahiro ARAKI , Takeshi TOKUYAMA , Akihiro NAMBA , Shigehisa AOYAGI , Noriyuki MAEKAWA
Abstract: A power conversion device includes: an inverter circuit; an AC conductor; a magnetic sensor that t detects magnetism generated when an AC current flows; a first magnetic body and a second magnetic body that face each other with the AC conductor and the magnetic sensor interposed therebetween; and a first housing and a second housing that are formed by conductive members. The first housing covers one opening of a space located between the first magnetic body and the second magnetic body, the second housing covers the other opening of the space. The end of each of the first magnetic body and the second magnetic body is formed so that the distance to the first housing or the second housing is smaller than the thickness of each of the first magnetic body and the second magnetic body in the arraying direction thereof.
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公开(公告)号:US20240414903A1
公开(公告)日:2024-12-12
申请号:US18700980
申请日:2021-10-26
Applicant: Hitachi Astemo, Ltd.
Inventor: Takayuki FUKUZAWA , Yoshio KAWAI , Akihiro NAMBA , Ning TANG
Abstract: An electronic control device includes: a substrate; a housing; and a shielding material that is filled between the substrate and the housing and electrically connects the substrate to the housing. In addition, in the shielding material, formed is a low-impedance region which has a low impedance and in which the density of a conductive filler is higher than in other portions.
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公开(公告)号:US20220077731A1
公开(公告)日:2022-03-10
申请号:US17420831
申请日:2020-01-08
Applicant: Hitachi Astemo, Ltd.
Inventor: Takahiro ARAKI , Kinya NAKATSU , Takayoshi NAKAMURA , Akihiro NAMBA , Hiroyuki OOIWA , Hideki MIYAZAKI
Abstract: An object of the present invention is to provide a wheel drive device capable of suppressing a temperature increase in an electric motor and a power conversion device and suppressing occurrence of a failure of an electric component. Provided are: an electric motor having a stator 60 and a rotor 40; a stator holder 80 that holds the stator 60; a power conversion device 100 that converts power supplied to the electric motor; and a wheel which accommodates the electric motor, the stator holder 80, and the power conversion device 100 on the inner peripheral side. The stator holder 80 includes a flow path 90 through which a cooling medium flows. The flow path 90 is arranged between the stator 60 and the power conversion device 100.
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公开(公告)号:US20240400789A1
公开(公告)日:2024-12-05
申请号:US18698314
申请日:2022-09-22
Applicant: Hitachi Astemo, Ltd.
Inventor: Yasuhiro TSUYUKI , Akihiro NAMBA , Yoshio KAWAI
Abstract: A heat dissipation material that has insulating properties and uses spherical fillers includes at least one of a filler having a particle size of 200 μm or more and 1000 μm or less and having a ratio of 20% or more and a filler having a particle size of 1 nm or more and 10 μm or less and having a ratio of 20% or more, with respect to the total amount of the fillers.
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