公开(公告)号：US11923670B2

公开(公告)日：2024-03-05

申请号：US17908317

申请日：2021-03-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuo Koga ,  Kazunori Kidera ,  Keita Kanamori

IPC: H02H1/00 ,  G01R31/40 ,  H02H7/26 ,  H02S50/00

CPC classification number: H02H1/0015 ,  G01R31/40 ,  H02H7/268 ,  H02S50/00

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.

公开(公告)号：US10985693B2

公开(公告)日：2021-04-20

申请号：US16478799

申请日：2017-12-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Atsushi Okita ,  Tatsuo Koga

IPC: H02S50/00 ,  G01R31/12

Abstract: In an arc detector, a frequency analyzer analyzes frequency components of a current subject to detection in a first frequency band. A detector detects an occurrence of an arc by referring to the frequency components in the first frequency band. When the detector does not detect the occurrence of an arc by referring to the frequency components in the first frequency band, the frequency analyzer analyzes frequency components of the current subject to detection in a second frequency band lower than the first frequency band, and the detector detects the occurrence of an arc by referring to the frequency components in the second frequency band.