CURRENT SENSOR

• US 20160146858A1
• Filed: 11/23/2015
• Published: 05/26/2016
• Est. Priority Date: 11/26/2014
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: MIYAKOSHI, Takaaki, Fujita, Noriaki, FUSHIMI, Shinsuke
• Granted Patent: US 9,784,769 B2
• Time in Patent Office: Days
• CPC Class Codes: G01R 15/207 Constructional details independent of the type of device used

Abstract

A current sensor includes: a U-shaped core as a magnetic body; a conductor inserted into a slit of the core; and a detection element arranged in the slit of the core and detecting a magnetic field, wherein the core includes recessed portions on both side surfaces facing the detection element and the recessed portions have wall portions intersecting with at least an insertion direction of the conductor.

Claims

1. A current sensor comprising:

a U-shaped core as a magnetic body;

a conductor inserted into a slit of the core; and

a detection element arranged in the slit of the core and detecting a magnetic field,

wherein the core includes recessed portions on both side surfaces facing the detection element and the recessed portions have wall portions intersecting with at least an insertion direction of the conductor.

2. The current sensor according to claim 1,

wherein the recessed portions are disposed in a central portion of the core in the insertion direction of the conductor.

3. The current sensor according to claim 1,

wherein the core is formed of stacked flat plates and the recessed portions are disposed by the stacked flat plates.

4. The current sensor according to claim 1,

wherein a detection surface of the detection element is arranged in a region lying between a first straight line as a connection between end portions of both recessed portions on an open end side of the slit and a second straight line as a connection between end portions of both recessed portions on a bottom side of the slit.

5. The current sensor according to claim 4,

wherein the detection surface of the detection element is arranged in a region lying between a third straight line as a connection between wall portions of both recessed portions in the insertion direction and a fourth straight line as a connection between the other wall portions of both recessed portions in the insertion direction.

6. The current sensor according to claim 1,

wherein surfaces of the slit facing the detection element are nonparallel to each other.

7. The current sensor according to claim 1,

wherein the recessed portions are disposed at positions shifted from the central portion to an open side of the slit.

8. The current sensor according to claim 4,

wherein the detection element and the conductor are arranged in the region lying between the first straight line and the second straight line.

9. The current sensor according to claim 4,

wherein the detection element is arranged on the first straight line side in the region lying between the first straight line and the second straight line.