Current sensor
First Claim
1. A current sensor comprising:
- a current-measured wiring including parallel wiring sections in which portions of a same wiring are arranged in parallel such that electric current to be measured flows in the parallel wiring sections in opposite directions each other;
a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings;
a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and
a magnetic core surrounding the parallel wiring sections so as to intensify a magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the parallel wirings, whereinthe magnetic core has a pair of walls facing each other over the plane formed by the parallel wirings, in which a distance between the pair of walls in a part located between the parallel wirings is the same as or longer than a distance in other parts, andthe magnetism detection unit is arranged between the pair of walls of the magnetic core.
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Accused Products
Abstract
A current sensor includes, a current-measured wiring including parallel wiring sections in which portions of the same wiring are arranged in parallel such that electric current to be measured flows therein in opposite directions each other; a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and a magnetic core surrounding the parallel wiring sections so as to intensify the magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the wirings. The magnetic core has a pair of plates facing each other over a plane formed by the parallel wirings, the pair of plates having flat and parallel inner faces, and the magnetism detection unit is arranged between the pair of plates of the magnetic core.
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Citations
17 Claims
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1. A current sensor comprising:
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a current-measured wiring including parallel wiring sections in which portions of a same wiring are arranged in parallel such that electric current to be measured flows in the parallel wiring sections in opposite directions each other; a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and a magnetic core surrounding the parallel wiring sections so as to intensify a magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the parallel wirings, wherein the magnetic core has a pair of walls facing each other over the plane formed by the parallel wirings, in which a distance between the pair of walls in a part located between the parallel wirings is the same as or longer than a distance in other parts, and the magnetism detection unit is arranged between the pair of walls of the magnetic core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of manufacturing a current sensor, comprising:
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with respect to a current-measured wiring including parallel wiring sections in which portions of a same wiring are arranged in parallel such that electric current to be measured flows in the parallel wiring sections in opposite directions each other, arranging a magnetism detection unit between parallel wirings located in the parallel wiring sections, the magnetism direction unit detecting a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; connecting the magnetism direction unit to a current detection unit which detects electric current flowing in the current-measured wiring based on the magnetic field detected by the magnetism detection unit; providing a magnetic core to surround the parallel wiring sections so as to intensify a magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the parallel wirings, the magnetic core having a pair of walls facing each other over a plane formed by the parallel wirings, in which a distance between the pair of walls in a part located between the parallel wirings is the same as or longer than a distance in other portions, and when providing the magnetic core, arranging the magnetism detection unit between the pair of walls of the magnetic core. - View Dependent Claims (17)
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Specification