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    Input-voltage-abnormality detection method and power source device
    1.
    发明授权
    Input-voltage-abnormality detection method and power source device 有权

    公开(公告)号：US10481184B2

    公开(公告)日：2019-11-19

    申请号：US15747296

    申请日：2016-06-07

    Applicant: Sumitomo Electric Industries, Ltd.

    Inventor： Fumio Urakawa ,  Tetsuo Akita ,  Koichi Takeshita

    IPC: G01R19/165 ,  G01R31/42 ,  H02H7/20 ,  H02J9/06

    Abstract: This abnormality detection method for a single-phase AC input voltage is executed by a control unit having a function of a phase locked loop, and includes: sequentially generating a simulated voltage waveform with a phase synchronized with the input voltage, by using the phase locked loop; and within a period until a next update of the generated simulated voltage waveform, comparing the instantaneous value of the input voltage with the simulated voltage waveform, and when the instantaneous value of the input voltage changes from a state of being along the simulated voltage waveform to a state of not being along the simulated voltage waveform, determining that the input voltage is abnormal.

    Power supply unit and method for backfeed protection thereof
    5.
    发明授权
    Power supply unit and method for backfeed protection thereof 有权

    公开(公告)号：US10355519B2

    公开(公告)日：2019-07-16

    申请号：US15743102

    申请日：2016-06-23

    Applicant: Sumitomo Electric Industries, Ltd.

    Inventor： Tetsuo Akita ,  Koichi Takeshita ,  Naoki Ayai ,  Tomohiro Yamaguchi

    IPC: H02J9/06 ,  G01R19/165 ,  H02M7/797 ,  H02J7/02

    Abstract: This power supply unit includes: an AC path from an input end to an output end; a first voltage sensor configured to detect an input voltage at the input end; a second voltage sensor configured to detect an output voltage at the output end; a bidirectional inverter connected to the AC path; a storage battery connected to the AC path via the bidirectional inverter; an AC switch provided between the input end and a point at which the bidirectional inverter is connected to the AC path; and a control unit configured such that, in a state in which the AC switch is controlled to be opened, if current conduction via the AC switch is detected on the basis of an operation state of the bidirectional inverter, the input voltage, and the output voltage, the control unit determines that the AC switch has failed, and stops the bidirectional inverter.

    POWER SUPPLY UNIT AND METHOD FOR BACKFEED PROTECTION THEREOF
    6.
    发明申请
    POWER SUPPLY UNIT AND METHOD FOR BACKFEED PROTECTION THEREOF 审中-公开

    公开(公告)号：US20190081505A1

    公开(公告)日：2019-03-14

    申请号：US15743102

    申请日：2016-06-23

    Applicant: Sumitomo Electric Industries, Ltd.

    Inventor： Tetsuo Akita ,  Koichi Takeshita ,  Naoki Ayai ,  Tomohiro Yamaguchi

    IPC: H02J9/06 ,  H02M7/797 ,  G01R19/165

    CPC classification number: H02J9/06 ,  G01R19/16547 ,  H02J7/022 ,  H02M7/797

    Abstract: This power supply unit includes: an AC path from an input end to an output end; a first voltage sensor configured to detect an input voltage at the input end; a second voltage sensor configured to detect an output voltage at the output end; a bidirectional inverter connected to the AC path; a storage battery connected to the AC path via the bidirectional inverter; an AC switch provided between the input end and a point at which the bidirectional inverter is connected to the AC path; and a control unit configured such that, in a state in which the AC switch is controlled to be opened, if current conduction via the AC switch is detected on the basis of an operation state of the bidirectional inverter, the input voltage, and the output voltage, the control unit determines that the AC switch has failed, and stops the bidirectional inverter.

    POWER CONVERSION DEVICE AND THREE-PHASE ALTERNATING CURRENT POWER SUPPLY DEVICE
    7.
    发明申请
    POWER CONVERSION DEVICE AND THREE-PHASE ALTERNATING CURRENT POWER SUPPLY DEVICE 有权
    电力转换装置和三相交流电源装置

    公开(公告)号：US20160329829A1

    公开(公告)日：2016-11-10

    申请号：US15109080

    申请日：2015-01-06

    Applicant: SUMITOMO ELECTRIC INDUSTRIES LTD.

    Inventor： Naoki Ayai ,  Koichi Takeshita

    IPC: H02M7/44 ,  H02M1/12 ,  H02M1/08 ,  H02M3/158

    CPC classification number: H02M7/44 ,  G05F1/10 ,  H02J3/383 ,  H02M1/08 ,  H02M1/126 ,  H02M3/158 ,  H02M7/5387 ,  H02M7/53871 ,  H02M2001/0009 ,  H02M2001/007 ,  Y02E10/563

    Abstract: Provided is a power conversion device that converts power between DC units and three-phase AC. A first-phase conversion device, a second-phase conversion device, and a third-phase conversion device each include a DC/DC conversion circuit and a single-phase power conversion circuit. For each of the first-phase conversion device, the second-phase conversion device, and the third-phase conversion device, when an absolute value of a voltage target value for the AC exceeds DC voltage of each DC unit, a control unit causes the DC/DC conversion circuit to operate to achieve the absolute value of the voltage target value and causes the single-phase power conversion circuit to only perform necessary polarity inversion, and when the absolute value of the voltage target value is smaller than the DC voltage, the control unit stops operation of the DC/DC conversion circuit and causes the single-phase power conversion circuit to operate to achieve the voltage target value.

    Abstract translation: 提供了在直流单元和三相AC之间转换功率的功率转换装置。 第一相转换装置，第二相转换装置和第三相转换装置各自包括DC / DC转换电路和单相电力转换电路。 对于第一相变换装置，第二相转换装置和第三相变换装置，当AC的电压目标值的绝对值超过每个DC单元的直流电压时，控制装置使得 DC / DC转换电路，以实现电压目标值的绝对值，并使单相功率转换电路仅执行必要的极性反转，并且当电压目标值的绝对值小于DC电压时， 控制单元停止DC / DC转换电路的动作，使单相电力变换电路动作，达到电压目标值。

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