Coil arrangement for a flowmeter and method of manufacturing a coil arrangement

1 . A coil arrangement for a flowmeter, comprising:

a coil;

wherein the coil has a coil body and has at least one coil winding made of an electrically conductive material;

wherein the coil body is made of a ceramic material;

wherein the coil body is produced by an additive manufacturing process;

wherein the coil body is at least partially hollow in an interior bounded by coil body walls;

wherein the material in the interior of the coil body is at least partially arranged in at least one of an irregular structure and a regular structure; and

wherein the material in the interior of the coil body that is at least partially arranged in at least one of an irregular structure and a regular structure is not part of the coil body walls.

2 . The coil arrangement according to claim 1 , wherein the coil body has at least partially in its interior at least one of an open porosity, a closed porosity, a column structure, a rib structure, and a lattice structure.

3 . The coil arrangement according to claim 1 , wherein the coil body has at least one back taper; and

wherein the at least one coil winding is arranged at least partially in the back taper.

4 . The coil arrangement according to claim 1 , wherein the coil arrangement has a sheathing at least partially closing off the exterior.

5 . The coil arrangement according to claim 1 , wherein the coil arrangement has a fastening element for fastening the coil arrangement to a component of a flowmeter.

6 . The coil arrangement according to claim 1 , wherein the at least one coil winding is produced by an additive manufacturing process; and

wherein the at least one coil winding is produced from a conductive ceramic.

7 . The coil arrangement according to claim 4 , wherein the sheathing is made from a ceramic material and is produced by an additive manufacturing process.

8 . The coil arrangement according to claim 7 , wherein the sheathing is formed integrally with the coil body.

9 . The coil arrangement according to claim 5 , wherein the fastening element is made of a ceramic material and is produced by an additive manufacturing process.

10 . The coil arrangement according to claim 9 , wherein the fastening element is formed integrally with at least one of the coil body and, if a sheathing is provided, with the sheathing.

11 . A flowmeter for determining the flow of a medium, comprising:

a coil arrangement;

wherein the coil arrangement has a coil, and the coil has a coil body and has at least one coil winding made of an electrically conductive material;

wherein the coil body is made of a ceramic material and the coil body is manufactured by an additive manufacturing process;

wherein the coil body is at least partially hollow in an interior bounded by coil body walls;

wherein the material in the interior of the coil body is at least partially arranged in at least one of an irregular structure and a regular structure; and

wherein the material in the interior of the coil body that is at least partially arranged in at least one of an irregular structure and a regular structure is not part of the coil body walls.

12 . The flowmeter according to claim 11 , wherein at least one of:

the coil body has at least partially in its interior at least one of an open porosity, a closed porosity, a column structure, a rib structure, and a lattice structure;

the coil body has at least one back taper, and the at least one coil winding is arranged at least partially in the back taper;

the coil arrangement has a sheathing at least partially closing off the exterior, the sheathing is made from a ceramic material and is produced by an additive manufacturing process, and the sheathing is formed integrally with the coil body;

the coil arrangement has a fastening element for fastening the coil arrangement to a component of a flowmeter, the fastening element is made of a ceramic material and is produced by an additive manufacturing process, and the fastening element is formed integrally with at least one of the coil body and, if a sheathing is provided, with the sheathing; and

the at least one coil winding is produced by an additive manufacturing process, and the at least one coil winding is produced from a conductive ceramic.

13 . A method for manufacturing a coil arrangement for a flowmeter, wherein the coil arrangement includes a coil body and at least one coil winding made of an electrically conductive material, the method comprising:

in a provisioning step, a 3D model of at least the coil body is provided;

in a coil body printing step, the coil body is manufactured from a ceramic material by an additive manufacturing process on the basis of the 3D model; and

in a winding step, the at least one coil winding is arranged around the coil body; or

in a coil winding provisioning step the at least one coil winding is provided and in a coil body printing step the coil body is printed by an additive manufacturing process on the basis of the 3D model from a ceramic material at least partially in an inner region of the provided coil winding, such that the provided coil winding is arranged around the printed coil body;

wherein in the provisioning step, a 3D model of the coil body is provided, in which the coil body is at least partially hollow in its interior;

wherein the material in the interior of the coil body is arranged at least partially in at least one of an irregular structure and a regular structure; and

wherein the material in the interior of the coil body that is at least partially arranged in at least one of an irregular structure and a regular structure is not part of the coil body walls.

14 . The method according to claim 13 , wherein the coil body printing step is divided into at least a first partial printing step and a second partial printing step;

wherein in the first partial printing step a first coil body part is manufactured;

wherein, in the winding step, the at least one coil winding is arranged around the first coil body part; and

wherein, in a second partial printing step, a second coil body part is produced, in such a way that it is formed integrally with the first coil body part.

15 . The method according to claim 13 , wherein in a coil winding model provisioning step, a 3D model of the at least one coil winding is provided; and

wherein in a coil winding printing step the at least one coil winding is manufactured from an electrically conductive material by an additive manufacturing process using the 3D model.

16 . The method according to claim 13 , wherein the coil arrangement has a sheathing at least partially closing off the exterior, wherein a 3D model of the sheathing is provided in the provisioning step;

wherein, in a sheathing printing step, the sheathing is manufactured from a ceramic material by an additive manufacturing process using the 3D model.

17 . The method according to claim 13 , wherein the coil arrangement has at least one fastening element for fastening the coil arrangement to a component of a flowmeter;

wherein a 3D model of the fastening element is provided in the provisioning step;

wherein, in a fastening element printing step, the fastening element is manufactured from a ceramic material by an additive manufacturing process using the 3D model.

18 . The method according to claim 17 , wherein the fastening element printing step and the coil body printing step and/or the sheathing printing step are carried out simultaneously, in such a way that the fastening element and the coil body and/or the sheathing are implemented in one piece.

19 . The method according to claim 13 , wherein the coil arrangement has a sheathing at least partially closing off the exterior, wherein a 3D model of the sheathing is provided in the provisioning step;

wherein, in a sheathing printing step, the sheathing is manufactured from a ceramic material by an additive manufacturing process using the 3D model; and

wherein the coil body printing step or at least a first partial printing step of the coil body printing step and the sheathing printing step are carried out simultaneously, in such a way that the coil body and the sheathing are implemented in one piece.