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1. US20160005533 - Inductor with thermally stable resistance

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[ EN ]

Claims

1. An inductor, comprising:
an inductor body having a top surface and first and second opposite end surfaces;
a void through the inductor body; and
a thermally stable resistive element configured for Kelvin-type measurements positioned through the void, the ends of the resistive element turned along outer surfaces of the inductor body toward the top surface to form first and second opposite surface mount terminals on the top surface;
wherein each of the surface mount terminals comprises a current-carrying terminal and a separate current-sensing terminal.
2. The inductor of claim 1, further comprising a slot in the top surface of the inductor body.
3. The inductor of claim 2, wherein the ends of the thermally stable resistive element are turned toward the slot.
4. The inductor of claim 1, wherein the thermally stable resistive element comprises a resistive material operatively connected to a conductive material, wherein the surface mount terminals comprise the conductive material.
5. The inductor of claim 1, wherein the thermally stable resistive element is formed from a first material, and the first and second opposite surface mount terminals are formed from a second material that is different from the first material.
6. The inductor of claim 1, wherein the current-carrying terminals are larger than the current-sensing terminals.
7. The inductor of claim 1, wherein the inductor body comprises a magnetic powder or a distributed gap magnetic material.
8. The inductor of claim 1, wherein the resistive element comprises multiple turns.
9. A method for forming an inductor comprising:
providing a thermally stable resistive element configured for Kelvin-type measurements;
forming an inductor body having a top surface and a first and second opposite end surfaces, around the thermally stable resistive element; and,
turning ends of the thermally stable resistive element along outer surfaces of the inductor body toward the top surface to form opposite surface mount terminals on the top surface of the inductor body, wherein each of the surface mount terminals comprises a current-carrying terminal and a separate current-sensing terminal.
10. The method of claim 9, further comprising forming a slot in the top surface of the inductor body.
11. The method of claim 10, wherein the ends of the thermally stable resistive element are turned toward the slot.
12. The method of claim 9, wherein the thermally stable resistive element comprises a resistive material operatively connected to a conductive material, wherein the surface mount terminals comprise the conductive material.
13. The method of claim 9, wherein the thermally stable resistive element is formed from a first material, and the first and second opposite surface mount terminals are formed from a second material that is different from the first material.
14. The method of claim 9, wherein the current-carrying terminals are larger than the current-sensing terminals.
15. The method of claim 9, wherein the inductor body comprises a magnetic powder or a distributed gap magnetic material.
16. The method of claim 9, wherein the resistive element comprises multiple turns.
17. An inductor comprising:
a thermally stable resistive element;
an inductor body having a top surface and first and second opposite end surfaces, the inductor body comprising a magnetic material pressed over the thermally stable resistive element;
wherein opposite ends of the thermally stable resistive element are each turned along outer side surfaces of the first and second opposite end surfaces toward the top surface of the inductor body and have ends that overlap the top surface of the inductor body to form opposite surface mount terminals, each surface mount terminal including a larger terminal for current carrying and a smaller terminal for Kelvin-type current sensing.
18. The inductor of claim 17, further comprising a slot in the top surface of the inductor body.
19. The inductor of claim 18, wherein the ends of the thermally stable resistive element are turned toward the slot.
20. The inductor of claim 17, wherein the thermally stable resistive element comprises a resistive material operatively connected to a conductive material, wherein the surface mount terminals comprise the conductive material.