Reactor

• US 9,007,158 B2
• Filed: 01/10/2014
• Issued: 04/14/2015
• Est. Priority Date: 08/31/2009
• Status: Active Grant

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Yoshikawa, Kouhei, Yamamoto, Shinichiro
• Primary Examiner(s): NGUYEN, TUYEN T
• Application Number:
  US14/152,707
• Publication Number:
  US 20140125308A1
• Time in Patent Office: 459 Days
• Field of Search: 336/65, 336/83, 336/200, 336/232, 336233-234, 336/90, 336/96
• US Class Current: 336/96
• CPC Class Codes: H01F 27/022 Encapsulation
• CPC Class Codes: H01F 27/263 Fastening parts of the core together
• CPC Class Codes: H01F 27/30 Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
• CPC Class Codes: H01F 27/306 Fastening or mounting coils or windings on core, casing or other support
• CPC Class Codes: H01F 37/00 Fixed inductances not covered by group H01F17/00

Abstract

To provide a reactor with which resin can fully be packed between a core and a coil with ease, and in which the core can easily be handled when the reactor is manufactured.

The reactor includes: a coil 10 formed with paired coil elements 10A and 10B that are made of a spirally wound wire, the coil elements being coupled to each other in a paralleled state; internal core portions 22 that are fitted into the coil elements 10A and 10B to structure a part of an annular core 20; and exposed core portions 24 that are exposed outside the coil elements 10A and 10B to couple the internal core portions 22 to each other, to thereby form the rest of the annular core 20. The reactor includes an external resin portion that covers at least a part of an assembled product 1A made up of the coil 10 and the core 20. An interval between the inner end face 24f of the exposed core portion 24 and the end face of the coil 10 is 0.5 mm to 4.0 mm, whereby the resin can easily be packed between the coil 10 and the core 20.

Claims

1. A reactor, comprising:

a coil formed with paired coil elements that are made of a spirally wound wire, the coil elements being coupled to each other in a paralleled state;

internal core portions that are fitted into the paired coil elements to structure a part of an annular core;

exposed core portions that are exposed outside the coil elements to couple the internal core portions to each other, to thereby form a rest of the annular core; and

an external resin portion that covers at least a part of an assembled product made up of the coil and the core, wherein

a resin structuring the external resin portion is packed between an inner end face of the exposed core portion and an end face of the coil; and

an interval formed by the resin structuring the external resin portion between the inner end face of the exposed core portion and the end face of the coil is 0.5 mm to 4.0 mm.

2. The reactor according to claim 1,

further comprising a coil molded product, the product includes the coil, and internal resin portion that retains a shape of the coil, and the internal core portion that integrated with the coil by the internal resin portion, wherein

the interval between the inner end face of the exposed core position and the end face of the coil is an interval between the inner end face of the exposed core portion and the end face of the coil molded product.

3. The reactor according to claim 1, further comprising a case that accommodates the assembled product.

4. A convertor including the reactor according to claim 1.

5. A power conversion device including the converter according to claim 4.