Magnetic field detection device and current sensor
First Claim
1. A magnetic field detection device comprising:
- a magnetic field detection element that detects a magnetic field;
a first magnetic body core extending in a first direction to surround the magnetic field detection element, the first magnetic body core having a first surface facing the magnetic field detection element, a second surface opposite to the first surface, a third surface between the first surface and the second surface, and a fourth surface opposite to the third surface;
a second magnetic body core extending in a second direction, perpendicular to the first direction, to surround the first magnetic body core, the second magnetic body core having a fifth surface facing the first magnetic body core, and a sixth surface opposite to the fifth surface; and
a first magnetic field source provided between third surface of the first magnetic body core and a part of the fifth surface of the second magnetic body core, the part of the fifth surface of the second magnetic body core facing the third surface of the first magnetic body core, whereinthe fourth surface of the first magnetic body core and another part of the fifth surface of the second magnetic body core magnetically contact each other, the another part of the fifth surface of the second magnetic body core facing the fourth surface of the first magnetic body core, andthe third surface of the first magnetic body core and the part of the fifth surface of the second magnetic body core are isolated from each other.
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Accused Products
Abstract
Provided is a magnetic field detection device and a current sensor capable of increasing the degree of freedom in selecting the type of the magnetic field detection element.
A magnetic field detection device 1 includes a conductor 3 that generates a magnetic field; a C core 2 provided so as to surround the conductor 3; and a magnetic field detection element 4 that detects a magnetic field. The C core 2 has a gap G1, and the magnetic field detection element 4 is disposed at a position where the magnetic field generated from the conductor 3 can be detected, the position being outside the gap G1. Since the direction of the magnetic flux varies outside of the gap G1 from place to place, the direction of the magnetic flux that passes through the magnetic field detection element 4 can be arbitrarily selected by arbitrarily selecting the installation location of the magnetic field detection element 4. Therefore, the degree of freedom in selecting the type of the magnetic field detection element 4 is increased.
38 Citations
17 Claims
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1. A magnetic field detection device comprising:
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a magnetic field detection element that detects a magnetic field; a first magnetic body core extending in a first direction to surround the magnetic field detection element, the first magnetic body core having a first surface facing the magnetic field detection element, a second surface opposite to the first surface, a third surface between the first surface and the second surface, and a fourth surface opposite to the third surface; a second magnetic body core extending in a second direction, perpendicular to the first direction, to surround the first magnetic body core, the second magnetic body core having a fifth surface facing the first magnetic body core, and a sixth surface opposite to the fifth surface; and a first magnetic field source provided between third surface of the first magnetic body core and a part of the fifth surface of the second magnetic body core, the part of the fifth surface of the second magnetic body core facing the third surface of the first magnetic body core, wherein the fourth surface of the first magnetic body core and another part of the fifth surface of the second magnetic body core magnetically contact each other, the another part of the fifth surface of the second magnetic body core facing the fourth surface of the first magnetic body core, and the third surface of the first magnetic body core and the part of the fifth surface of the second magnetic body core are isolated from each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification