Magnetic sensor device and manufacturing method for a magnetic sensor device

Patent metadata

Field	Value
Publication number	US-9778323-B2
Application number	US-201415034650-A
Country	US
Kind code	B2
Filing date	Sep 5, 2014
Priority date	Nov 6, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A magnetic sensor device having a first magnetic core structure which is aligned along a first central longitudinal axis and has at least one first coil, and having a second magnetic core structure which includes at least one second coil, the second magnetic core structure extending from a first end face of the second magnetic core structure along a second central longitudinal axis to a second end face of the second magnetic core structure, the second central longitudinal axis lying in a plane aligned in a direction normal to the first central longitudinal axis, and the second magnetic core structure being positioned in relation to the first magnetic core structure in such a way that a clearance between the first end face of the second magnetic core structure and a first center of mass of the first magnetic core structure is less than 20% of a maximum extension of the first magnetic core structure along the first central longitudinal axis.

First claim

What is claimed is:

1. A magnetic sensor device, comprising:
a first magnetic core structure which is aligned along a first central longitudinal axis and includes at least one first coil, windings of the at least one first coil extending around the first central longitudinal axis of the first magnetic core structure;
a second magnetic core structure having at least one second coil, the second magnetic core structure extending from a first end face of the second magnetic core structure along a second central longitudinal axis to a second end face of the second magnetic core structure, and windings of the at least one second coil extending around the second central longitudinal axis of the second magnetic core structure; and
a third magnetic core structure which is aligned along a third central longitudinal axis and includes at least one third coil, windings of the at least one third coil extending around the third central longitudinal axis of the third magnetic core structure;
wherein:
the second central longitudinal axis lies in a plane aligned in a direction normal to the first central longitudinal axis, and a position of the second magnetic core structure in relation to the first magnetic core structure being such that a clearance between the first end face of the second magnetic core structure and a first center of mass of the first magnetic core structure is less than 20% of a maximum extension of the first magnetic core structure along the first central longitudinal axis, the third central longitudinal axis being aligned in a direction normal to the first central longitudinal axis and in a direction normal to the second central longitudinal axis;
a position of the third magnetic core structure in relation to the first magnetic core structure and the second magnetic core structure is such that the third central longitudinal axis extends through the first center of mass of the first magnetic core structure, the first magnetic core structure and the third magnetic core structure being developed in a cross structure such that the first central longitudinal axis and the third central longitudinal axis lie in a common plane.

2. The magnetic sensor device as recited in claim 1 , wherein a third center of mass of the third magnetic core structure and the first center of mass of the first magnetic core structure coincide.

3. The magnetic sensor device as recited in claim 1 , wherein the first magnetic core structure and the third magnetic core structure are formed in such a way that a central magnetic core region is formed that is shared by the first magnetic core structure and the third magnetic core structure.

4. The magnetic sensor device as recited in claim 1 , further comprising:
at least of: i) at least one drive coil, and ii) at least one detector coil as the at least one coil, is situated on at least one of the magnetic core structures.

5. A method for manufacturing a magnetic sensor device, comprising:
aligning a first magnetic core structure having at least one first coil along a first central longitudinal axis in such a way that windings of the at least one first coil extend around the first central longitudinal axis;
aligning a second magnetic core structure having at least one second coil along a second central longitudinal axis, which lies in a plane that is aligned in a direction normal to the first central longitudinal axis, such that the second magnetic core structure extends from a first end face of the second magnetic core structure along the second central longitudinal axis to a second end face of the second magnetic core structure, and windings of the at least one second coil extend around the second central longitudinal axis of the second magnetic core structure, the position of the second magnetic core structure in relation to the first magnetic core structure being such that a clearance between the first end face of the second magnetic core structure and a first center of mass of the first magnetic core structure is less than 20% of a maximum extension of the first magnetic core structure along the first central longitudinal axis; and
adding a third magnetic core structure having at least one third coil, windings of the at least one third coil extending around a third central longitudinal axis of the third magnetic core structure, the third central longitudinal axis of the third magnetic core structure being aligned in a direction normal to the first central longitudinal axis and in a direction normal to the second central longitudinal axis;
wherein a position of the third magnetic core structure in relation to the first magnetic core structure and the second magnetic core structure is such that the third central longitudinal axis extends through the first center of mass of the first magnetic core structure, and the first magnetic core structure and the third magnetic core structure being developed in a cross structure so that the first central longitudinal axis and the third central longitudinal axis lie in a common plane.

Assignees

• Bosch Gmbh Robert

Inventors

• Dannenberg Arne
• Breitling Achim
• Patak Christian
• Senz Volkmar
• Gencol Sevki
• Sinanoglu Tamer

Classifications

• G01R33/04

  using the flux-gate principle · CPC title

• G01R33/0005 Primary

  Geometrical arrangement of magnetic sensor elements; Apparatus combining different magnetic sensor types (G01R33/0206 takes precedence) · CPC title

• G01R33/0052

  Manufacturing aspects; Manufacturing of single devices, i.e. of semiconductor magnetic sensor chips (devices based on galvano-magnetic effect or the like H10N50/85) · CPC title