CURRENT SENSOR AND MEASUREMENT DEVICE

WIPO Patent Application WO/2016/098750

A1

The present invention ensures linearity of detection sensitivity. The present invention is provided with: an annular magnetic core CR forming a closed magnetic circuit which encompasses an electrical path to be measured; an electromagnetic transducer unit 15 for detecting a magnetic flux within the magnetic core CR and outputting an electrical signal of an amplitude corresponding to a flux quantity of this magnetic flux; a coil 16 that is formed on the magnetic core CR and to which a negative feedback current generated on the basis of the electrical signal is supplied; and an internal shield member SH2 disposed in the vicinity of at least the electromagnetic transducer unit 15 and the coil 16. The internal shield member SH2 has formed thereon a first gap G1 for increasing the magnetoresistance of a closed magnetic circuit for a leakage flux φ3 from the magnetic core CR, the closed magnetic circuit being configured to comprise the internal shield member SH2, a site of formation of the coil 16 in the magnetic core CR, and the electromagnetic transducer unit 15.

WO/2014/084628	APPARATUS FOR MEASURING CURRENT OF BATTERY AND METHOD THEREFOR
JP2012122793	CURRENT SENSOR
JP2015210250	CURRENT SENSOR AND MANUFACTURING METHOD OF CURRENT SENSOR

YOKOTA OSAMU (JP)
MASUDA HIDEKAZU (JP)

PCT/JP2015/084997

June 23, 2016

December 15, 2015

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HIOKI ELECTRIC WORKS (JP)

G01R15/20

JP2006046922A	2006-02-16
JP2008275321A	2008-11-13
JP2012117839A	2012-06-21

SAKAI, SHINJI (JP)
Shinji Sakai (JP)

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