Title:
ELECTRIC CURRENT CANCELLATION DEVICE AND IMPEDANCE MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/013713
Kind Code:
A1
Abstract:
The present invention reduces the level of an electric current component flowing in a load connection line connected to a load, and prevents failure of the load when the level of an AC signal supplied to the load connection line is increased. The present invention is provided with: a contactless electric current sensor 3 that detects, in a contactless manner, an electric current component flowing in a load connection line L connected to a load Load; and a cancellation signal injection unit 4 that generates a cancellation signal Sk for cancelling a noise signal Sn detected by the contactless electric current sensor 3 and that injects, in a contactless manner, the generated cancellation signal Sk to the load connection line L.
Inventors:
HOTTA AKINORI (JP)
TOYA HIROYUKI (JP)
IKEDA HIROYOSHI (JP)
KASAI SHIN (JP)
SAKAI TOMOHARU (JP)
YANAGISAWA KOICHI (JP)
TOYA HIROYUKI (JP)
IKEDA HIROYOSHI (JP)
KASAI SHIN (JP)
SAKAI TOMOHARU (JP)
YANAGISAWA KOICHI (JP)
Application Number:
PCT/JP2022/029876
Publication Date:
February 09, 2023
Filing Date:
August 04, 2022
Export Citation:
Assignee:
HIOKI ELECTRIC WORKS (JP)
International Classes:
G01R27/02; G01R31/389
Foreign References:
| KR102133498B1 | 2020-07-13 | |||
| JP2017512372A | 2017-05-18 | |||
| US20150168500A1 | 2015-06-18 | |||
| JP2017058176A | 2017-03-23 |
Attorney, Agent or Firm:
SAKAI Shinji (JP)
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