Producing power bushing condenser core by additive manufacturing

Patent metadata

Field	Value
Publication number	US-11045998-B2
Application number	US-201816480605-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Feb 10, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A method for producing an electrical power device having an insulator. The method includes, by means of additive manufacturing, applying a polymeric insulating material forming part of the device. The method also includes, in a subsequent consolidation step, subjecting the insulator to elevated temperature and pressure during a predetermined time period to consolidate the insulator.

First claim

The invention claimed is:

1. A method for producing an electrical power device comprising an insulator, the method including:
by means of additive manufacturing, applying a polymeric insulating material in the device, to form the insulator in the device;
in a subsequent consolidation step, subjecting the insulator to elevated temperature and pressure during a predetermined time period to consolidate the insulator;
by means of the additive manufacturing, applying an inner concentric layer of the condenser core, of the polymeric insulating material around and along a longitudinal through hole of the device;
applying a first of a plurality of concentric intermediate layers of an electrically conducting material, on top of the inner layer, around and along the longitudinal through hole; and
by means of the additive manufacturing, applying an outer concentric layer of the condenser core, of the polymeric insulating material, on top of a second of the plurality of concentric intermediate layers, around and along the longitudinal through hole; before subjecting the condenser core to the elevated temperature and pressure during the predetermined time period to consolidate the condenser core.

2. The method of claim 1 , wherein the electrically conducting intermediate layers are applied by coating, ink jet printing or 3D printing, plasma deposition, physical or chemical vapor deposition, spray coating or painting, with a brush, or by adhering a conducting foil, on any layer of the polymeric insulating material.

3. The method of claim 2 , wherein the condenser core is configured for an operating voltage of the device of at least 30 kV or within a range of 35-400 kV, 35-170 kV, or 140-400 kV.

4. The method of claim 2 , further comprising arranging the condenser core in a high-voltage bushing, an instrument transformer or a cable termination.

5. The method of claim 1 , wherein the condenser core is configured for an operating voltage of the device of at least 30 kV or within a range of 35-400 kV, such as 35-170 kV, or 140-400 kV.

6. The method of claim 1 , further comprising arranging the condenser core in a high-voltage bushing, an instrument transformer or a cable termination.

7. The method of claim 6 , further comprising arranging the bushing through a wall of a transformer tank.

8. The method of claim 1 , wherein the method includes forming the insulator in the form of a medium voltage insulator, a bushing, support insulator, bushing plate, embedded pole or monoblock insulator.

9. The method of claim 1 , wherein the additive manufacturing includes Fused Deposition Modelling, FDM.

10. The method of claim 1 , wherein the polymeric insulating material is a thermoplastic material.

11. The method of claim 1 , wherein the additive manufacturing includes applying the polymeric insulating material at a temperature of at least 150 degree C.

12. The method of claim 1 , wherein the polymeric insulating material has a glass transition temperature, T.sub.g, of at least 120 degree C. or less than 40 degree C.

13. The method of claim 1 , wherein the electric power device is a bushing, an instrument transformer or a cable termination.

14. The method of claim 1 , wherein the additive manufacturing includes Fused Deposition Modeling, FDM.

15. The method of claim 1 , wherein the polymeric insulating material is a thermoplastic material.

Assignees

• Abb Power Grids Switzerland Ag

Inventors

• Martini Harald
• Schiessling Joachim
• Lavesson Nils
• Forssen Cecilia
• Faleke Håkan
• Viertel Julia
• Matysiak Lukasz
• Czyzewski Jan
• Hedlund Roger
• Rocks Jens

Classifications

• H01B17/28

  Capacitor type · CPC title

• B29C64/10

  Processes of additive manufacturing · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B29C64/124

  using layers of liquid which are selectively solidified · CPC title

• B29C64/118 Primary

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title