CHOKE

• US 20100308950A1
• Filed: 12/18/2009
• Published: 12/09/2010
• Est. Priority Date: 06/08/2009
• Status: Abandoned Application

• Current Assignee: Cyntec Co. Ltd. (Delta Electronics Incorporated)
• Original Assignee: Cyntec Co. Ltd. (Delta Electronics Incorporated)
• Inventors: Kuo, Yu-Ching, Hsieh, Lan-Chin, Liu, Chun-Tiao, Hsieh, Roger
• Application Number:
  US12/642,327
• Publication Number:
  US 20100308950A1
• Time in Patent Office: Days
• US Class Current: 336/221
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 17/045 with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
• CPC Class Codes: H01F 2017/048 with encapsulating core, e.g. made of resin and magnetic powder
• CPC Class Codes: H01F 27/022 Encapsulation
• CPC Class Codes: H01F 3/10 Composite arrangements of magnetic circuits
• CPC Class Codes: H01F 41/005 Impregnating or encapsulating insulating of windings H01F41/12
• CPC Class Codes: Y10T 29/49073 by assembling coil and core

Abstract

A choke including a core and a hollow coil is provided. The core includes a first core body and a second core body. The first core body includes a pillar. The second core body is a flat plate and has an opening. An end of the pillar is suitable to be disposed in the opening and joined to the same. The hollow coil is fitted on the pillar.

Claims

1. A choke, comprising:

a core, comprising;

a first core body, comprising a pillar; and

a second core body, being a flat plate and provided with an opening, wherein an end of the pillar is suitable to be disposed in the opening and joined to the same; and

a hollow coil, fitted on the pillar.

2. The choke according to claim 1, wherein the second core body comprises a joining face and an assembling face opposite to the joining face, the end of the pillar is suitable to be disposed in the opening from the joining face, and the opening is located at a center of the second core body and in communication with the joining face and the assembling face.

3. The choke according to claim 2, wherein the end of the pillar is substantially aligned with the assembling face.

4. The choke according to claim 2, wherein the end of the pillar passes through the opening and protrudes from the assembling face.

5. The choke according to claim 2, wherein the hollow coil comprises two end portions disposed on the assembling face.

6. The choke according to claim 5, wherein the second core body further comprises two wire grooves located at edges of the second core body, and the end portions pass through the wire grooves.

7. The choke according to claim 1, further comprising a material layer disposed on an inner wall of the opening and located between the pillar and the opening.

8. The choke according to claim 7, wherein the material layer is a magnetic gel.

9. The choke according to claim 1, wherein the first core body further comprises a top plate connected to an end of the pillar, the pillar and the top plate are integrally formed, and the hollow coil is located between the top plate of the first core body and the second core body.

10. The choke according to claim 1, further comprising a magnetic gel encapsulating the hollow coil.

11. The choke according to claim 1, further comprising a magnetic gel and a case with an opening end, wherein the case is of a barrel-shaped structure, the core and the hollow coil are disposed in the case, the second core body is disposed at the opening end and an assembling face of the second core body is exposed out of the opening end, and the magnetic gel is disposed in a space between the case and the hollow coil.

12. The choke according to claim 11, wherein the second core body further comprises at least one injection hole located at an edge of the second core body, and the magnetic gel is suitable to be filled in the case through the injection hole.

13. The choke according to claim 1, further comprising a package fitted on the pillar of the first core body, wherein the package comprises the hollow coil and a magnetic material encapsulating the hollow coil.

14. The choke according to claim 1, further comprising a magnetic case provided with two opening ends, an upper surface, and a lower surface opposite to the upper surface, wherein the opening ends are respectively located at the upper surface and the lower surface and in communication with each other, the hollow coil is disposed in the magnetic case, the pillar of the first core body penetrates through the opening ends of the magnetic case, and the second core body is disposed on the lower surface of the magnetic case.

15. The choke according to claim 1, wherein the first core body comprises a top plate connected to an end of the pillar, the top plate of the first core body is provided with a bottom portion and two side wall portions, the side wall portions are disposed at two opposite side edges of the bottom portion, and an extension direction of the side wall portions is substantially perpendicular to that of the bottom portion.

16. The choke according to claim 15, wherein the second core body is disposed between the side wall portions.

17. The choke according to claim 1, wherein the second core body is directly disposed on the hollow coil.

18. A choke, comprising:

a core, comprising a pillar;

at least one wire, wound around the pillar of the core; and

a case, being of a barrel-shaped structure with an opening end, wherein the core and the wire are disposed in the case, and the opening end exposes an assembling face of the core.

19. The choke according to claim 18, wherein the core comprises a top plate and a bottom plate with the assembling face, the pillar is disposed between the top plate and the bottom plate, a winding space is formed between the top plate, the bottom plate, and the pillar, and the wire is located in the winding space.

20. The choke according to claim 18, wherein the core comprises a bottom plate with the assembling face, the bottom plate comprises at least one injection hole located at an edge of the bottom plate, and a magnetic gel is suitable to be filled in the case through the injection hole.

21. The choke according to claim 18, wherein the core comprises a pillar and a bottom plate with the assembling face, the bottom plate comprises an opening, an end of the pillar is suitable to be disposed in the opening and joined to the same, and the wire is a hollow coil fitted on the pillar.

22. The choke according to claim 21, wherein the bottom plate is directly disposed on the hollow coil.

23. A choke, comprising:

a core, comprising a pillar; and

a package, fitted on the pillar of the core and comprising a hollow coil and a magnetic material, wherein the magnetic material encapsulates the hollow coil.

24. The choke according to claim 23, wherein in the package, the magnetic material encapsulates the hollow coil by means of injection molding or press molding.

25. The choke according to claim 23, wherein the core further comprises a top plate, the pillar and the top plate are integrally formed, and an end of the pillar is fitted in the package.

26. The choke according to claim 23, wherein the core further comprises a top plate, the pillar and the top plate are integrally formed, and an end of the pillar passes through the package and is substantially aligned with a surface of the package away from the top plate.

27. The choke according to claim 23, wherein the core further comprises a top plate and a bottom plate, the top plate and the pillar are integrally formed, an end of the pillar passes through the package and is substantially aligned with a surface of the package away from the top plate, and the bottom plate covers the end of the pillar and the surface of the package.

28. The choke according to claim 23, wherein the core further comprises a top plate and a bottom plate, the top plate and the pillar are integrally formed, the bottom plate is provided with an opening, a joining face, and an assembling face opposite to the joining face, an end of the pillar passes through the package and is disposed in the opening from the joining face, and the end of the pillar is substantially aligned with the assembling face.

29. A choke, comprising:

a core, comprising;

a first core body, comprising a top plate and a pillar, wherein the top plate is provided with a bottom portion and a side wall portion, the side wall portion is disposed around the bottom portion, an extension direction of the side wall portion is substantially perpendicular to that of the bottom portion, and the side wall portion surrounds the pillar; and

a second core body, being a flat plate and provided with an opening, wherein an end of the pillar is suitable to be disposed in the opening; and

a hollow coil, fitted on the pillar and located between the top plate of the first core body and the second core body, wherein a height of the hollow coil is smaller than that of the side wall portion of the top plate, and the side wall portion at least contacts a part of the hollow coil.

30. The choke according to claim 29, wherein the pillar and the top plate are integrally formed.

31. The choke according to claim 29, wherein the second core body comprises a joining face and an assembling face opposite to the joining face, the end of the pillar is suitable to be disposed in the opening from the joining face, and the opening is located at a center of the second core body and in communication with the joining face and the assembling face.

32. The choke according to claim 31, wherein the end of the pillar is substantially aligned with the assembling face.

33. The choke according to claim 31, wherein the end of the pillar passes through the opening and protrudes from the assembling face.

34. The choke according to claim 29, wherein the first core body further comprises at least one wire groove disposed at the side wall portion of the top plate.

35. The choke according to claim 29, further comprising a material layer disposed on an inner wall of the opening and located between the pillar and the opening.

36. The choke according to claim 29, wherein the second core body is directly disposed on the hollow coil.