Electrical component

Patent metadata

Field	Value
Publication number	US-11043330-B2
Application number	US-201415120223-A
Country	US
Kind code	B2
Filing date	Feb 26, 2014
Priority date	Feb 26, 2014
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

An electrical component includes a conductor having a plurality of conductor sections. The conductor sections are electrically short-circuited. The short circuit is at least partially eliminated when the temperature of the component exceeds a threshold or limit value. An electrical circuit including the component and a method for increasing the inductance of an electrical component having a conductor, are also provided.

First claim

The invention claimed is:

1. An electrical component comprising:
a conductor including a plurality of conductor sections;
said plurality of conductor sections being electrically short-circuited with one another resulting in a short circuit;
said short circuit being at least partially eliminated when a temperature of the component exceeds a limit value; and
an expansion material disposed between said conductor sections, said expansion material having a composition that increases in volume when the temperature of the component exceeds the limit value.

2. The component according to claim 1 , wherein said short circuit is at least partially eliminated when the temperature of the component exceeds the limit value due to an electric current flowing through the component.

3. The component according to claim 1 , wherein:
said conductor has a first end and a second end;
a first electrical connection of the component is connected to said first end of said conductor; and
a second electrical connection of the component is connected to said second end of said conductor.

4. The component according to claim 1 , wherein said conductor sections are turns of a winding.

5. The component according to claim 1 , wherein an inductance of the component is increased when said short circuit is at least partially eliminated.

6. The component according to claim 1 , wherein said conductor sections are uninsulated and said conductor sections bear against one another, causing said conductor sections to be electrically short-circuited.

7. The component according to claim 1 , wherein said conductor sections each respectively have a first recess for receiving said expansion material or a first recess and a second recess for receiving said expansion material.

8. The component according to claim 7 , wherein at least one of said first recess or said second recess is disposed between two adjacent conductor sections.

9. The component according to claim 7 , wherein said first recess is disposed on one side of said conductor sections and said second recess is disposed on an opposite side of said conductor sections.

10. The component according to claim 7 , wherein at least one of said first recess or said second recess runs along said conductor sections.

11. The component according to claim 7 , wherein at least one of said first recess or said second recess is a groove running along said conductor sections.

12. The component according to claim 1 , wherein said expansion material includes a plastic or a polymer with a positive coefficient of thermal expansion.

13. The component according to claim 1 , which further comprises:
an electrically conductive plastic disposed between said conductor sections;
said conductor sections being uninsulated; and
said conductor sections being electrically short-circuited due to said conductor sections being uninsulated and due to said electrically conductive plastic disposed between said conductor sections.

14. The component according to claim 13 , wherein said plastic has a non-reactive resistance increasing when the limit value for the temperature is exceeded.

15. The component according to claim 14 , wherein said plastic at least one of becomes gaseous or at least partially fuses when the limit value for the temperature is exceeded.

16. An electrical circuit, comprising a component according to claim 1 .

17. The electrical circuit according to claim 16 , which further comprises:
an energy storage device; and
a current path electrically connected to said energy storage device;
said component being disposed in said current path.

18. A method for increasing an inductance of an electrical component, the method comprising the following steps:
providing the electrical component with a conductor including a plurality of conductor sections electrically short-circuited with one another when a temperature of the component is below a limit value resulting in a short circuit;
at least partially eliminating the short circuit when the temperature of the component exceeds the limit value;
placing an expansion material between the conductor sections; and
increasing a volume of the expansion material when the limit value for the temperature is exceeded.

19. The method according to claim 18 , wherein:
the electrical short circuit of the conductor sections is caused by the conductor sections being uninsulated and bearing against one another.

20. The method according to claim 18 , wherein the electrical short circuit of the conductor sections is caused by the conductor sections being uninsulated and by an electrically conductive material being provided between the conductor sections.

21. The method according to claim 20 , wherein the electrically conductive material is an electrically conductive plastic.

22. The method according to claim 20 , wherein a non-reactive resistance of the electrically conductive material increases when the limit value for the temperature is exceeded.

23. The method according to claim 22 , wherein the non-reactive resistance of the electrically conductive material is increased when the limit value for the temperature is exceeded due to the electrically conductive material at least one of becoming gaseous or at least partially fusing.

24. The method according to claim 18 , wherein the conductor sections are turns of a winding.

25. The method according to claim 18 , wherein the inductance of the component is increased when the short circuit is at least partially eliminated.

26. An electrical component comprising:
a conductor including a plurality of conductor sections;
said plurality of conductor sections being electrically short-circuited with one another by the plurality of conductor sections being uninsulated and bearing against one another, resulting in a short circuit;
said short circuit being at least partially eliminated when a temperature of the component exceeds a limit value; and
an expansion material disposed between said conductor sections, said expansion material having a composition that increases in volume when the temperature of the component exceeds the limit value.

Assignees

• Siemens Ag

Inventors

• Brehm Holger Siegmund
• Boehm Matthias
• Schmitt Daniel

Classifications

• H01C7/12

  Overvoltage protection resistors; Arresters · CPC title

• H01C7/008

  Thermistors (H01C7/02 - H01C7/06 take precedence) · CPC title

• H01F38/023

  of inductances · CPC title

• H01F29/12 Primary

  having movable coil, winding, or part thereof; having movable shield · CPC title

• H01G7/00

  Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture · CPC title