Coil, magnetic core, and reactor

Patent metadata

Field	Value
Publication number	US-2021296042-A1
Application number	US-201716334617-A
Country	US
Kind code	A1
Filing date	Sep 5, 2017
Priority date	Sep 21, 2016
Publication date	Sep 23, 2021
Grant date	—

Abstract

A coil includes a tubular winding portion formed by winding a wire, wherein the winding portion includes two coil recessed portions that are provided such that recessed directions toward an inner space surrounded by an inner peripheral face of the winding portion are opposite to each other.

First claim

1 . A coil comprising a tubular winding portion formed by winding a wire,
wherein the winding portion includes two coil recessed portions that are provided such that recessed directions toward an inner space surrounded by an inner peripheral face of the winding portion are opposite to each other, the wire includes a conductor made of a rectangular wire, and an installation face and an opposing face of the winding portion, and side faces that are positioned on both sides in a width direction of the winding portion include portions formed as flat faces.

2 . (canceled)

3 . (canceled)

4 . (canceled)

5 . A magnetic core comprising: an inner leg portion that is arranged along an inner periphery of a winding portion of a coil; two side leg portions that are arranged along an outer periphery of the winding portion and sandwich the inner leg portion; and two connection portions that sandwich and couple the inner leg portion and the side leg portions,
wherein the inner leg portion includes:
a protruding portion that is not sandwiched between the two side leg portions; and
two core recessed portions that are provided such that recessed directions toward an inside of the inner leg portion are opposite to each other, and
the side leg portions include projecting faces that respectively project toward the core recessed portions, and that are arranged with predetermined gaps respectively from the core recessed portions.

6 . The magnetic core according to claim 5 , wherein a ratio of a long side with respect to a short side of a rectangle that encapsulates a horizontal cross-section obtained by cutting the magnetic core along a plane that is orthogonal to an axial direction of the inner leg portion is 1.5 or more.

7 . The magnetic core according to claim 5 , wherein the two core recessed portions are arranged opposing each other, and the two projecting faces are arranged opposing each other.

8 . The magnetic core according to claim 5 , comprising at least one of a molded body made of a composite material containing a magnetic powder and a resin, and a powder compact containing a magnetic powder.

9 . The magnetic core according to claim 5 , formed by combining a pair of divided core pieces,
wherein each of the divided core pieces includes a connection portion on one side, and an inner leg piece that forms part of the inner leg portion and two side leg pieces that form part of the side leg portions, the pieces being provided standing upright from the connection portion.

10 . A reactor comprising: a coil comprising a tubular winding portion formed by winding a wire, wherein the winding portion includes two coil recessed portions that are provided such that recessed directions toward an inner space surrounded by an inner peripheral face of the winding portion are opposite to each other; and the magnetic core according to claim 5 ,
wherein the coil recessed portions are respectively arranged between the core recessed portions of the inner leg portion and the projecting faces of the side leg portions, and the portion of the winding portion other than the coil recessed portions is exposed without being covered by the magnetic core.

11 . The reactor according to claim 10 , wherein the side leg portions have a face that is flush with part of the portion of the winding portion exposed from the magnetic core.

12 . The reactor according to claim 10 , wherein a ratio of a long side with respect to a short side of a rectangle that encapsulates an end face of the winding portion is 1.5 or more.

13 . The reactor according to claim 10 , wherein the two coil recessed portions are arranged opposing each other.

14 . The reactor according to claim 10 , further comprising a resin molded portion that covers at least part of the outer periphery of the winding portion.

15 . The reactor according to claim 10 ,
wherein the wire includes a conductor made of a rectangular wire, and an installation face and an opposing face of the winding portion, and side faces that are positioned on both sides in a width direction of the winding portion include portions formed as flat faces.

Assignees

• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industries

Inventors

• Inaba Kazuhiro

Classifications

• H01F27/327

  Encapsulating or impregnating (encapsulating coil and core H01F27/022) · CPC title

• H01F27/2847 Primary

  Sheets; Strips (H01F27/2866 takes precedence) · CPC title

• H01F27/022

  Encapsulation · CPC title

• H01F27/263

  Fastening parts of the core together · CPC title

• H01F27/32

  Insulating of coils, windings, or parts thereof · CPC title