Current Compensated Inductor and Method for Producing a Current Compensated Inductor

• US 20120146756A1
• Filed: 07/27/2010
• Published: 06/14/2012
• Est. Priority Date: 08/06/2009
• Status: Active Application

• Current Assignee: Epcos AG (TDK Corporation)
• Original Assignee: Epcos AG (TDK Corporation)
• Inventors: Roellgen, Bernhard, Stoll, Karl
• Application Number:
  US13/388,266
• Publication Number:
  US 20120146756A1
• Time in Patent Office: Days
• US Class Current: 336/196
• CPC Class Codes: H01F 17/062 Toroidal core with turns of coil around it
• CPC Class Codes: H01F 27/2847 Sheets; Strips H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/2895 Windings disposed upon ring cores
• CPC Class Codes: H01F 41/08 Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores

Abstract

The invention relates to a current compensated inductor comprising a single piece annularly closed ferrite core. The ferrite core comprises at least two wire coils each comprising a flat wire wound on edge and disposed, for example, without a coil bobbin and at a distance from each other on the ferrite core.

Claims

1-12. -12. (canceled)

13. A current compensated inductor, comprising:

a single-piece ferrite core in the form of a closed ring having a rectangular shape and an electrically insulating coating, wherein the ferrite core has at least two wire coils with a high filling level, each wire coil composed of a flat wire wound upright, the wire coils being-arranged spaced apart from one another without a coil former on the ferrite core.

14. The current compensated inductor according to claim 13, wherein the wire coils each have just one layer.

15. The current compensated inductor according to claim 13, wherein a spatial distance which is as large as possible is maintained between the two wire coils.

16. The current compensated inductor according to claim 13, wherein the wire coils are connected symmetrically with respect to one another but have opposing winding directions to one another.

17. The current compensated inductor according to claim 13, wherein the ferrite core is arranged in a housing and wherein the winding is arranged on the housing.