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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：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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4.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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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：US20230099131A1
公开(公告)日：2023-03-30
申请号：US17908987
申请日：2021-03-03
Inventor： Tatsuo KOGA , Yoshio MITSUTAKE , Keita KANAMORI
Abstract: An arc detection device includes a voltage detector connected between a first wire and a second wire to detect a voltage between the first wire and the second wire, the first wire connecting a positive electrode of a DC/DC converter and a plurality of DC/DC converters and branching from the positive electrode of the DC power source into the plurality of DC/DC converters, the second wire connecting a negative electrode of the DC/DC converter and the plurality of DC/DC converters and branching from the negative electrode of the DC/DC converter into the plurality of DC/DC converters; and an arc determiner that determines an occurrence of an arc based on the voltage detected by the voltage detector.
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公开(公告)号：US20250164138A1
公开(公告)日：2025-05-22
申请号：US18841969
申请日：2023-02-02
Inventor： Naoto IZUMOTO , Keita KANAMORI , Kenichiro TANAKA
IPC: F24F11/64 , F24F110/10 , F24F110/20 , F24F110/50 , F24F120/12
Abstract: An environment control system is an environment control system that controls an environment of a target space. The environment control system includes: an obtainer that obtains biological information of a person present in the target space and environmental information of the target space; an estimator that estimates, based on the biological information and the environmental information obtained by the obtainer, a position of the person in the target space and a condition level indicating a level of comfort felt by the person in regard to the environment; a generator that generates, based on the position and the condition level of the person estimated by the estimator, a control signal that controls an operation of a device provided in the target space; and an outputter that outputs the control signal generated by the generator to the device.
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公开(公告)号：US20230280387A1
公开(公告)日：2023-09-07
申请号：US18017691
申请日：2021-07-20
Inventor： Tatsuo KOGA , Kazunori KIDERA , Kazuya OHSHIMA , Takahiro OHORI , Keita KANAMORI
CPC classification number: G01R31/086 , G06F30/27
Abstract: An anomaly detection device that detects an anomaly in an object, the anomaly detection device includes: an analyzer that performs frequency analysis of sensing data obtained from a sensor that senses a physical quantity of the object; and a determiner that determines whether an anomaly is occurring in the object based on an output result output from a trained model by inputting frequency analysis data of the sensing data obtained from the sensor to the trained model that has been trained based on at least one of frequency analysis data of sensing data of the physical quantity obtained when the object is in a normal state or frequency analysis data of sensing data of the physical quantity obtained when the object is in an anomalous state.
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公开(公告)号：US20230268740A1
公开(公告)日：2023-08-24
申请号：US18017140
申请日：2021-07-20
Inventor： Takahiro OHORI , Kazunori KIDERA , Tatsuo KOGA , Kazuya OHSHIMA , Keita KANAMORI
IPC: H02J3/38
CPC classification number: H02J3/38
Abstract: A power distribution system includes: a power distribution network that includes one or more connections to which a load is connectable; and a plurality of power supplies capable of supplying power to the power distribution network. Power is supplied to the power distribution network from at least one power supply of the plurality of power supplies. Adjacent power supplies included in the plurality of power supplies are arranged with a gap therebetween, and a connection included in the one or more connections is positioned in the gap.
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