The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
Jun. 28, 2023
Yokogawa Electric Corporation, Musashino, JP;
Yokogawa Test & Measurement Corporation, Hachioji, JP;
Hiroki Minami, Hachioji, JP;
Hiroyuki Ishida, Hachioji, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Yokogawa Test & Measurement Corporation, Tokyo, JP;
Abstract
A current sensor includes a magnetic core that can be arranged to surround a conducting wire through which a current to be measured flows, magnetic sensors each configured to detect magnetic flux in a predetermined portion of the magnetic core, amplifiers arranged in correspondence with the magnetic sensors, feedback coils arranged in correspondence with the magnetic sensors, and a current detector that detects the current to be measured based on a current yielded by combining currents flowing through each of the feedback coils. Each of the amplifiers amplifies an output of the corresponding magnetic sensor and outputs a current corresponding to the output of the corresponding magnetic sensor. Each feedback coil is wound around the magnetic core and passes the current outputted by the corresponding amplifier in a direction that cancels the corresponding magnetic flux in the predetermined portion of the magnetic core.