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 (JP)
Application Number:
PCT/JP2018/037937
Publication Date:
April 18, 2019
Filing Date:
October 11, 2018
Export Citation:
Assignee:
TAMURA SEISAKUSHO KK (JP)
International Classes:
G01R15/18; G01R15/20; H01F3/02; H01F27/24; H01F38/20
Domestic Patent References:
| WO2014036731A1 | 2014-03-13 |
Foreign References:
| JP2015210246A | 2015-11-24 | |||
| JP2013179233A | 2013-09-09 | |||
| JP2011510318A | 2011-03-31 | |||
| JPH0545383A | 1993-02-23 | |||
| JP2016206173A | 2016-12-08 | |||
| JP2011227062A | 2011-11-10 | |||
| US20030227285A1 | 2003-12-11 |
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