# US 12,113,347 B2 · Arc detection device, indoor power line system, solar power generation system, and storage battery system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,347 B2 - Document ID: US12113347B2 - Status: Granted - Kind: B2 - Application number: 17/907,847 - Filed: 2021-03-03 - Published: 2023-04-27 - Granted: 2024-10-08 - Earliest claimed: 2020-03-11 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Kazunori Kidera; Tatsuo Koga; Keita Kanamori - Web page: https://patentgrep.com/patent/US12113347B2 ## CPC - H02H 1/0015: {Using arc detectors} - G01R 15/202: {using Hall-effect devices (Hall elements in arrangements for measuring electrical power G01R21/08)} - G01R 31/40: Testing power supplies (testing photovoltaic devices H02S50/10) - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## 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. ## Claims ### Claim 1 An arc detection device in a system including one or more power sources, a plurality of converters that adjust voltages of the one or more power sources, and a plurality of load devices, the one or more power sources and the plurality of converters being connected to each other by a first plurality of power lines, the plurality of converters and the plurality of load devices being connected to each other by a second plurality of power lines, the arc detection device comprising: an electric current detector that includes a magnetic core through which two or more power lines extend, the two or more lines correspond to (a) at least one power line included in the first plurality of power lines and at least one power line included in the second plurality of power lines or (b) power lines included in the second plurality of power lines through which electric currents flow in opposite directions at the magnetic core, and detects combined currents flowing through the two or more power lines according to a magnetic field produced at the magnetic core; and an arc determiner that determines, based on the combined currents detected by the electric current detector, whether an electric arc has occurred, wherein one or more converters included in the first plurality of converters are connected to the one or more power sources, and one or more converters included in the second plurality of converters are connected to each of the plurality of load devices. ### Claim 2 (depends on 1) The arc detection device according to claim 1, wherein the two or more power lines are a power line connected to one input terminal of a first converter included in the plurality of converters and a power line connected to an output terminal of the first converter. ### Claim 3 (depends on 2) The arc detection device according to claim 2, comprising: a plurality of the electric current detectors, wherein the arc determiner locates, based on electric currents detected by the plurality of electric current detectors, the electric arc that has occurred. ### Claim 4 (depends on 1) An indoor power line system comprising: the arc detection device according to claim 1, wherein one power source included in the one or more power sources includes a system power supply, and the plurality of converters include AC/DC converters. ### Claim 5 (depends on 1) A solar power generation system comprising: the arc detection device according to claim 1, wherein at least one power source included in the one or more power sources includes a solar cell, another power source included in the one or more power sources includes a system power supply, and one load device included in the plurality of load devices includes a DC/AC converter connected to the system power supply. ### Claim 6 (depends on 1) A storage battery system comprising: the arc detection device according to claim 1; a storage battery that operates as at least one power source included in the one or more power sources or at least one load device included in the plurality of load devices; and a system power supply that operates as at least one power source included in the one or more power sources or at least one load device included in the plurality of load devices, wherein during charging of the storage battery, the system power supply operates as a power source, a converter connected to the system power supply operates as an AC/DC converter, and the storage battery and a converter connected to the storage battery each operate as a load device, and during discharging of the storage battery, the storage battery operates as a power source, a converter connected to the storage battery operates as a DC/DC converter, and the system power supply and a converter connected to the system power supply each operate as a load device. ### Claim 7 (depends on 6) The storage battery system according to claim 6, wherein at least one power source included in the one or more power sources includes a solar cell. ### Claim 8 (depends on 1) The arc detection device according to claim 1, wherein the two or more power lines are a power line connected to an output terminal of a first converter included in the plurality of converters and a power line connected to an output terminal of a second converter included in the plurality of converters. ### Claim 9 (depends on 8) The arc detection device according to claim 8, comprising: a plurality of the electric current detectors, wherein the arc determiner locates, based on electric currents detected by the plurality of electric current detectors, the electric arc that has occurred.