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1.发明公开公开(公告)号：US20230305047A1
公开(公告)日：2023-09-28
申请号：US18015056
申请日：2021-07-20
Inventor： Kazunori KIDERA , Tatsuo KOGA , Takahiro OHORI , Keita KANAMORI , Kazuya OHSHIMA
IPC: G01R31/00
CPC classification number: G01R31/002
Abstract: An arc detection device includes an obtainer and a determiner. The obtainer obtains a measurement result for a voltage applied to one target power supply line among a plurality of power supply lines to which power is supplied from a DC power source. The determiner determines, based on a component of a specific frequency band in the measurement result for the voltage obtained by the obtainer, whether there is a possibility of an arc fault occurring in the plurality of power supply lines.
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公开(公告)号：US20230094178A1
公开(公告)日：2023-03-30
申请号：US17908691
申请日：2021-03-03
Inventor： Tatsuo KOGA , Kazunori KIDERA , Keita KANAMORI
Abstract: An anomaly detection device includes: a determiner that determines whether the communication connection via a communication line connecting a DC/DC converter including a communication function and each of a DC/DC converter and an inverter has been lost; and an outputter that outputs an anomalous signal when it is determined that the communication connection has been lost.
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公开(公告)号：US20230011371A1
公开(公告)日：2023-01-12
申请号：US17802632
申请日：2021-03-03
Inventor： Kazuya OHSHIMA , Tatsuo KOGA , Keita KANAMORI , Kazunori KIDERA
Abstract: An arc detection device includes: a current detector that includes a magnetic core penetrated by first and second paths and each connecting a DC power source and a device, and detects a current flowing through each of the first and second paths and in accordance with a magnetic field generated at the magnetic core; a low impedance circuit having a lower impedance than the DC power source and the device, the low impedance circuit being connected to the first path and the second path to cause a high frequency component to bypass one of the first path or the second path; and an arc determiner that determines an occurrence of an arc based on a current detected by the current detector. In the magnetic core, a direct current flows through the first path in a direction opposite to a direction in which a direct current flows through the second path.
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公开(公告)号：US20160087549A1
公开(公告)日：2016-03-24
申请号：US14787331
申请日：2014-04-23
Inventor： Hideki TAMURA , Kazunori KIDERA , Jin YOSHIZAWA
CPC classification number: H02M7/797 , H02J3/383 , H02J5/00 , H02M1/36 , H02M7/125 , H02M7/48 , H02M2001/007
Abstract: A power conditioner includes first and second power conversion portions, a smoothing capacitor, and an auxiliary power supply. The first power conversion portion is connected to a DC system. The second power conversion portion is connected to an AC system. The capacitor is connected between wires of an intermediate bus which connects input/output terminals of the first power conversion portion and the second power conversion portion. The auxiliary power supply receives commercial power and generates an auxiliary charge voltage to be applied to the capacitor. The first power conversion portion converts DC power of the storage battery to a first DC voltage and outputs the first DC voltage to the intermediate bus. The second power conversion portion converts a voltage of the capacitor to an AC voltage and outputs the AC voltage to the AC system. The auxiliary charge voltage is lower than the first DC voltage.
Abstract translation: 功率调节器包括第一和第二功率转换部分，平滑电容器和辅助电源。 第一电力转换部分连接到DC系统。 第二电力转换部分连接到AC系统。 电容器连接在连接第一电力转换部分的输入/输出端子和第二电力转换部分的中间总线的导线之间。 辅助电源接收商用电力，并产生要施加到电容器的辅助充电电压。 第一电力转换部将蓄电池的直流电力转换为第一直流电压，并将第一直流电压输出到中间总线。 第二电力转换部分将电容器的电压转换成AC电压，并将AC电压输出到AC系统。 辅助充电电压低于第一直流电压。
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公开(公告)号：US20230253167A1
公开(公告)日：2023-08-10
申请号：US18015134
申请日：2021-09-08
Inventor： Kazunori KIDERA , Tatsuo KOGA , Takahiro OHORI
CPC classification number: H01H1/0015 , H02H3/093
Abstract: An arc detection system includes an obtainer and a determiner. The obtainer obtains a measurement result for current flowing in a power supply line to which power is supplied from a DC power source. The determiner determines, based on a component of a specific frequency band in the measurement result for the current obtained by the obtainer, whether an arc fault has occurred. The determiner determines that the arc fault has occurred when a specific time for which the component of the specific frequency band is at least a threshold is longer than an occurrence time in which an arc can occur when a device is attached to or detached from the power supply line.
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Patent Agency Ranking
公开(公告)号：US20230126245A1
公开(公告)日：2023-04-27
申请号：US17907847
申请日：2021-03-03
Inventor： Kazunori KIDERA , Tatsuo KOGA , Keita KANAMORI
Abstract: An arc detection device is used in a system including one or more power sources, a plurality of converters, and a plurality of load devices. The one or more power sources and the plurality of converters are connected to each other by a plurality of power lines. The plurality of converters and the plurality of load devices are connected to each other by a plurality of power lines. The arc detection device includes: an electric current detector that includes a magnetic core through which two or more power lines included in the plurality of power lines extend, and detects combined currents flowing through the two or more power lines according to the magnetic field produced at the magnetic core; and an arc determiner that determines, on the basis of the combined currents detected by the electric current detector, whether an electric arc has occurred.
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公开(公告)号：US20160056589A1
公开(公告)日：2016-02-25
申请号：US14781304
申请日：2014-02-19
Inventor： Takuya KAGAWA , Hideki TAMURA , Kazunori KIDERA
IPC: H01R13/713 , B60L11/18 , H01R13/66
CPC classification number: H01R13/7135 , B60L3/00 , B60L3/0069 , B60L3/04 , B60L11/1809 , B60L11/1818 , B60L11/1842 , B60L2240/36 , H01R13/665 , H01R13/6683 , H01R13/713 , H02J7/0029 , Y02E60/721 , Y02T10/7005 , Y02T10/7072 , Y02T90/121 , Y02T90/128 , Y02T90/14 , Y02T90/163 , Y04S10/126
Abstract: Connector for electrical connection includes coupler, cable, switch mechanism, failure detector and transmitter. Coupler is removably inserted in and connected to reception side connector provided in machine which is equipped with storage battery. Cable includes two or more electric wires including power line configured to be electrically connected to reception side connector via coupler. Cable is connected to device that performs at least one of supplying power to machine and receiving power from machine. Switch mechanism opens and closes electrical circuit between coupler and power line. Failure detector detects occurrence of failure of coupler. Transmitter transmits detection result of failure detector to device through at least one first electric wire of the two or more electric wires. Switch mechanism opens and closes the electrical circuit in accordance with control signal transmitted through first electric wire.
Abstract translation: 用于电气连接的连接器包括耦合器，电缆，开关机构，故障检测器和变送器。 耦合器可移除地插入并连接到设置有装有蓄电池的机器中的接收侧连接器。 电缆包括两条或更多条电线，包括配置成通过耦合器与接收侧连接器电连接的电力线。 电缆连接到至少一个机器供电并从机器接收电力的设备。 开关机构打开和关闭耦合器和电源线之间的电路。 故障检测器检测耦合器故障的发生。 变送器通过两根或多根电线的至少一根第一根电线将故障检测器的检测结果发送到设备。 开关机构根据通过第一根电线传输的控制信号来打开和关闭电路。
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公开(公告)号：US20240072528A1
公开(公告)日：2024-02-29
申请号：US18272574
申请日：2021-02-05
Inventor： Tatsuo KOGA , Keita KANAMORI , Kazunori KIDERA , Yoshio MITSUTAKE
CPC classification number: H02H1/0015 , G01R31/12 , H02H7/20 , H02S50/10
Abstract: An arc detection device that detects an arc fault that occurs in a transmission line connecting a DC power supply that generates DC power and a power converter that converts the DC power to AC power, includes: a first determination unit that determines whether or not there is a possibility of an arc fault occurrence according to current flowing in the transmission line; a shutoff unit that temporarily stops the flow of current in the transmission line when the first determination unit determines there is a possibility of an arc fault occurrence; and a second determination unit that determines whether or not an arc fault has occurred according to an input voltage, of the power converter supplied from the DC power supply, after lifting temporary stoppage of the flow of current in the transmission line.
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公开(公告)号：US20230095385A1
公开(公告)日：2023-03-30
申请号：US17908317
申请日：2021-03-03
Inventor： Tatsuo KOGA , Kazunori KIDERA , Keita KANAMORI
Abstract: An arc detection device includes: a low-impedance circuit connected between a node on wiring connecting the positive electrode of a DC/DC converter and a plurality of DC/DC converters, extending from the positive electrode of the DC/DC converter, and branching toward the plurality of DC/DC converters and a node on wiring connecting the negative electrode of the DC/DC converter and the plurality of DC/DC converters, extending from the negative electrode of the DC/DC converter, and branching toward the plurality of DC/DC converters; an electric current detector that detects an electric current flowing through the low-impedance circuit; and an arc determiner that determines, on the basis of the electric current detected by the electric current detector whether an electric arc has occurred.
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公开(公告)号：US20200014307A1
公开(公告)日：2020-01-09
申请号：US16490536
申请日：2017-12-07
Inventor： Kazunori KIDERA
Abstract: A control circuit converts power by controlling a phase difference between a switching phase of a plurality of switching elements of a first bridge circuit and a switching phase of a plurality of switching elements of a second bridge circuit such that the control circuit controls the phase difference to be smaller to reduce the output power. When the phase difference reaches a predefined lower limit value in a step-down mode of stepping down the input power, the control circuit controls an on-time of the plurality of switching elements of the second bridge circuit to be shorter while the phase difference is fixed at the lower limit value.
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