CURRENT SENSOR

• US 20110221429A1
• Filed: 02/11/2011
• Published: 09/15/2011
• Est. Priority Date: 03/09/2010
• Status: Active Grant

• Current Assignee: Alps Alpine Co., Ltd.
• Original Assignee: Alps Green Devices Co., Ltd. (Alps Alpine Co., Ltd.)
• Inventors: TAMURA, Manabu
• Granted Patent: US 8,564,250 B2
• Time in Patent Office: Days
• US Class Current: 324/244
• CPC Class Codes: G01R 15/207 Constructional details independent of the type of device used

Abstract

Disclosed is a current sensor including magnetic sensors disposed on a conductor having at least two separated current-carrying areas with different current magnitudes and detecting a magnetic field generated according to currents flowing through the conductor and a controller controlling outputs of the magnetic sensors, wherein the magnetic sensors are disposed in at least two respective areas having different current magnitudes and the controller switches outputs of the magnetic sensors.

Claims

1. A current sensor comprising magnetic sensors disposed on a conductor having at least two separated current-carrying areas with different current magnitudes and detecting a magnetic field generated according to currents flowing through the conductor and a controller controlling outputs of the magnetic sensors,

wherein the magnetic sensors are disposed in at least two respective areas having different current magnitudes and the controller switches outputs of the magnetic sensors.

2. The current sensor according to claim 1,

wherein the magnetic sensors are respectively disposed in separated areas in the conductor.

3. The current sensor according to claim 1,

wherein the magnetic sensors are respectively disposed in a separated area and an unseparated area in the conductor.

4. The current sensor according to claim 1,

wherein the conductor has three separated current-carrying areas with different ampacities, and an intensity ratio of the magnetic field generated in the three separated current-carrying areas is 50:

5;

1.

5. The current sensor according to claim 1,

wherein in the at least two current-carrying areas, a pair of magnetic sensors which are diametrically opposite to each other in a sensitivity axial direction are disposed in the conductor at outer positions being symmetrical with respect to the center of the conductor, and the controller removes a disturbance magnetic field from the output of the pair of magnetic sensors.

6. A battery comprising a battery body including a current line and the current sensor according to claim 1 installed in the current line.