INTEGRATED CURRENT SENSOR USING Z-AXIS MAGNETORESISTIVE GRADIOMETER AND LEAD FRAME CURRENT

Title:

INTEGRATED CURRENT SENSOR USING Z-AXIS MAGNETORESISTIVE GRADIOMETER AND LEAD FRAME CURRENT

Document Type and Number:

WIPO Patent Application WO/2016/173447

Kind Code:

A1

Abstract:

An integrated current sensor, comprising a Z-axis gradiometer (13) and lead frame primary coil (15); the Z-axis gradiometer (13) is a magnetoresistive Z-axis gradiometer, comprising a substrate (10), two elongated soft magnetic flux concentrators (A1, B1) having a separate gradient feature interval and being positioned on the substrate (10), and magnetoresistive sensing unit strings positioned on the upper surface and the lower surface of the soft magnetic flux concentrators (A1, B1) and being equidistant from a long axis centre line (11), the magnetic field sensitive direction of the magnetoresistive sensing units being perpendicular to the long axis centre line (11) and the magnetoresistive sensing units being electrically connected to form a gradient sensor bridge; the lead frame primary coil (15) comprises an elongated current detection band (151) positioned above or below the Z-axis gradiometer (13), the current detection direction (17) of the current detection belt being parallel to the direction of the long axis centre line (11); 5-50A current measurement can be implemented, and the present invention has the advantages of low power consumption, small size, and a high degree of integration.

Inventors:

DEAK JAMES GEZA (CN)
ZHOU ZHIMIN (CN)

Application Number:

PCT/CN2016/079850

Publication Date:

November 03, 2016

Filing Date:

April 21, 2016

Export Citation:

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Assignee:

MULTIDIMENSION TECHNOLOGY CO LTD (CN)

International Classes:

G01R19/00; G01R15/00

Domestic Patent References:

WO2009112412A1

2009-09-17

Foreign References:

CN101788596A	2010-07-28
CN103995240A	2014-08-20
CN204789707U	2015-11-18
CN104820125A	2015-08-05
CN103809008A	2014-05-21
CN102313831A	2012-01-11
US20070159159A1	2007-07-12

Other References: