ELECTRIC CURRENT SENSOR

WIPO Patent Application WO/2018/110108

A1

An electric current sensor detects an electric current flowing through each of at least two electric current paths (40) individually, and is provided with at least two phases including a magnetism detection element (10) for sensing a magnetic field generated from an electric current path and converting the magnetic field to an electrical signal, and first magnetic shields (20, 21) and a second magnetic shield (30) as a pair disposed facing each other with the electric current route and the magnetism detection element interposed therebetween. In each phase, a first magnetic shield, an electric current path, a magnetism detection element, and a second magnetic shield are layered in this order, at least two phases are disposed in the direction orthogonal to the layering direction, a first gap (X1) is provided between the first magnetic shields of adjacent phases, and a second gap (X2) is provided between the second magnetic shields of adjacent phases. The first gap and/or the second gap is adjusted so that a leakage magnetic field from the first gap toward a magnetism detection element and a leakage magnetic field from the second gap toward the magnetism detection element cancel each other out, in order to prevent the leakage magnetic fields from reaching the magnetism detection element.

ESAKA TAKUMA (JP)
NOMURA KOHSUKE (JP)
SAKAI RYOSUKE (JP)
SUGITO TATSUAKI (JP)

PCT/JP2017/038657

June 21, 2018

October 26, 2017

Click for automatic bibliography generation  

DENSO CORP (JP)

G01R15/20

WO2015178478A1	2015-11-26
WO2015111408A1	2015-07-30
WO2013001789A1	2013-01-03

JP2010002277A	2010-01-07
JP2016200436A	2016-12-01
US20100264905A1	2010-10-21
JP2017227617A	2017-12-28

JIN Shunji (JP)

View/Download PDF      PDF Help

Previous Patent: FLEXIBLE CONDUCTOR, AND VACUUM CIRCUIT BREAKER USING FLEXIBLE CONDUCTOR

Next Patent: BATTERY PACK AND POWER SOURCE SYSTEM INCLUDING SAME