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:
Jan. 30, 2018
Filed:
Jan. 20, 2015
Hitachi Metals, Ltd., Tokyo, JP;
Katsuya Akimoto, Hitachi, JP;
Hisashi Tate, Hitachi, JP;
Naoki Futakuchi, Hitachinaka, JP;
Naofumi Chiwata, Mito, JP;
Ken Okuyama, Hitachi, JP;
Yukio Ikeda, Hitachi, JP;
Kazuhisa Takahashi, Hitachi, JP;
HITACHI METALS, LTD., Tokyo, JP;
Abstract
An electric current sensor includes a plurality of bus bars arranged in parallel, a plurality of magnetic detection elements that are adapted to detect a strength of a magnetic field generated by an electric current flowing through the bus bars and to output a voltage according to the strength of the magnetic field detected, and an arithmetic operation part to arithmetically operate an electric current flowing through the bus bars based on the voltage output from the plurality of magnetic detection elements. The arithmetic operation part includes a magnetic flux density arithmetic operation part to arithmetically operate a magnetic flux density based on the voltage, and an electric current arithmetic operation part to arithmetically operate an electric current Ito Iflowing through each of the bus bars based on formula (1) below, Bto Bare a magnetic flux density and Ito Iare an electric current.