Uninterruptible power-supply system

    公开(公告)号:US10044220B2

    公开(公告)日:2018-08-07

    申请号:US14702936

    申请日:2015-05-04

    Applicant: Hitachi, Ltd.

    Abstract: When the power is normally supplied from the commercial power supply, the storage battery is charged by reducing the DC voltage by the charge/discharge chopper. The switching unit is provided in the previous stage of the converter. When the commercial power supply is in an abnormal state, the three-phase AC converter is operated as three discharge choppers connected in parallel by supplying the power of the storage battery to the converter and boosting the power by the switching element included in the converter. The power of the storage battery is boosted by the charge/discharge chopper, and a part of the discharging power is supplied. One three-phase AC reactor is provided in the previous stage of the converter, and the three-phase AC reactor has three coils, magnetic leg iron cores having the coils winding around them, and one leg without a coil winding around it connected in parallel.

    Power semiconductor device
    5.
    发明授权
    Power semiconductor device 有权
    功率半导体器件

    公开(公告)号:US09013877B2

    公开(公告)日:2015-04-21

    申请号:US13689299

    申请日:2012-11-29

    Applicant: Hitachi, Ltd.

    Abstract: The purpose of the present invention is to provide a power semiconductor device which has a light weight, high heat dissipation efficiency, and high rigidity. The power semiconductor device including a base 1, semiconductor circuits 2 which are arranged on the base 1, and a cooling fin 3 which cools each of the semiconductor circuits 2, in which one or more protruding portions 1a, 1b are formed on the base 1, widths of the protruding portions 1a, 1b in a direction parallel to the base 1 surface being longer than a thickness of the base 1, thereby providing power semiconductor devices 100, 200, 300, 400 which have a light weight, high heat dissipation efficiency, and high rigidity.

    Abstract translation: 本发明的目的是提供一种重量轻,散热效率高,刚性高的功率半导体装置。 功率半导体器件包括基底1,布置在基底1上的半导体电路2和冷却翅片3,其冷却每个半导体电路2,其中一个或多个突出部分1a,1b形成在基座1上 突出部分1a,1b在平行于基底1表面的方向上的宽度比基体1的厚度长,从而提供功率半导体器件100,200,300,400,其具有重量轻,散热效率高 ,高刚性。

    Power conversion device and electric railroad vehicle equipped with power conversion device

    公开(公告)号:US11211881B2

    公开(公告)日:2021-12-28

    申请号:US16962308

    申请日:2018-10-15

    Applicant: HITACHI, LTD.

    Abstract: A power conversion device achieves size reduction and reliability by reducing the number of components of the system. The power conversion device has a semiconductor module of a half-bridge configuration in which two semiconductor elements are arranged in series. The semiconductor module has a cuboidal shape and has, along a longitudinal direction thereof, a positive pole terminal, a negative pole terminal, and terminals for inputting or outputting alternating current or for forming a single phase of the power conversion device. In the vertical direction corresponding to a widthwise direction of the cuboid, a plurality of the semiconductor modules are arranged vertically, forming a plurality of phases of the power conversion device. The semiconductor modules of the plurality of phases are installed in contact with a cooling unit, and one or more capacitors are disposed so as to face the cooling unit across the semiconductor modules of the plurality of phases.

    Power Semiconductor Device
    10.
    发明申请
    Power Semiconductor Device 有权
    功率半导体器件

    公开(公告)号:US20130135824A1

    公开(公告)日:2013-05-30

    申请号:US13689299

    申请日:2012-11-29

    Applicant: Hitachi, Ltd.

    Abstract: The purpose of the present invention is to provide a power semiconductor device which has a light weight, high heat dissipation efficiency, and high rigidity. The power semiconductor device including a base 1, semiconductor circuits 2 which are arranged on the base 1, and a cooling fin 3 which cools each of the semiconductor circuits 2, in which one or more protruding portions 1a, 1b are formed on the base 1, widths of the protruding portions 1a, 1b in a direction parallel to the base 1 surface being longer than a thickness of the base 1, thereby providing power semiconductor devices 100, 200, 300, 400 which have a light weight, high heat dissipation efficiency, and high rigidity.

    Abstract translation: 本发明的目的是提供一种重量轻,散热效率高,刚性高的功率半导体装置。 功率半导体器件包括基底1,布置在基底1上的半导体电路2和冷却翅片3,其冷却每个半导体电路2,其中一个或多个突出部分1a,1b形成在基座1上 突起部分1a,1b在平行于基底1表面的方向上的宽度比基体1的厚度长,从而提供功率半导体器件100,200,300,400,其具有重量轻,散热效率高 ,高刚性。

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