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Patent Searching and Data


Title:
CURRENT DETECTOR
Document Type and Number:
WIPO Patent Application WO/2019/074062
Kind Code:
A1
Abstract:
In order to increase the magnetic flux density that passes through a magnetic core and to optimize arrangement of a probe coil in a manner corresponding to the structure of the magnetic core, this current sensor 10 is provided with: multiple magnetic core members 22, 23 which are stacked in a state in which plate-shape long leg parts 22b, 23b overlap with each other in the thickness direction in a position along one long edge of the current sensor, and, in a position along the other long edge thereof, plate-shape upper short legs 22c, 23c and lower short legs 22d, 23d are placed abutting each other with a gap therebetween; a probe coil unit 50 which is arranged on the magnetic circuit, in a position along the other long edge; secondary windings 60a, 70a which generate a magnetic field in the magnetic circuit in the direction opposite of the magnetic field generated by the current being detected; a detection circuit which, on the basis of a secondary current necessary for eliminating the output current of the probe coil, outputs a detection signal corresponding to the detected current; and a primary conductor 30 which, passing through the inside of the magnetic circuit, forms a conducting path extending around the outside of the probe coil.

Inventors:
OKAYAMA, Yusuke (Tamura Corporation 5-5-30, Chiyoda, Sakado-sh, Saitama 14, 〒3500214, JP)
Application Number:
JP2018/037937
Publication Date:
April 18, 2019
Filing Date:
October 11, 2018
Export Citation:
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Assignee:
TAMURA CORPORATION (1-19-43, Higashi-Oizumi Nerima-k, Tokyo 11, 〒1788511, JP)
International Classes:
G01R15/18; G01R15/20; H01F3/02; H01F27/24; H01F38/20
Domestic Patent References:
WO2014036731A12014-03-13
Foreign References:
JP2015210246A2015-11-24
JP2013179233A2013-09-09
JP2011510318A2011-03-31
JPH0545383A1993-02-23
JP2016206173A2016-12-08
JP2011227062A2011-11-10
US20030227285A12003-12-11
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