Reactor and magnetic core for reactor

Patent metadata

Field	Value
Publication number	US-11417455-B2
Application number	US-201716335100-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 21, 2016
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

Provided is a reactor including: a coil including two wound portions obtained by winding a winding wire; and a magnetic core in which the wound portions are arranged. The magnetic core includes: inner leg portions arranged inside the inner peripheries of the wound portions; a central leg portion provided between the wound portions; two outer leg portions that are provided outside the outer peripheries of the wound portions and between which the inner leg portions and the central leg portion are provided; and two coupling portions between which the inner leg portions, the central leg portion, and the outer leg portions, which are arranged in parallel, are sandwiched and with which these portions are coupled.

First claim

The invention claimed is:

1. A reactor comprising:
a coil including two wound portions obtained by winding a winding wire and a connecting portion that connects the wound portions; and
a magnetic core in which the wound portions are arranged,
wherein the winding wire is a coated wire including a conductive wire and an insulating coating that covers an outer periphery of the conductive wire,
the magnetic core includes:
an inner leg portion arranged inside inner peripheries of the wound portions;
a central leg portion provided between the wound portions;
two outer leg portions that are provided outside outer peripheries of the wound portions and between which the inner leg portions and the central leg portion are provided; and
two coupling portions between which the inner leg portions, the central leg portion, and the outer leg portions, which are arranged in parallel, are sandwiched and with which these portions are coupled,

the central leg portion and the inner leg portions have substantially a same length,
the outer leg portions have lengths that are longer than those of the central leg portion and the inner leg portions, and
the coupling portions are provided with a cutout portion formed by cutting the coupling portions such that regions of the coupling portions in which the central leg portion is provided have lengths that are the same as those of the inner leg portions.

2. The reactor according to claim 1 ,
wherein the magnetic core includes at least one of a composite material molded article containing magnetic powder and a resin, and a powder molded article.

3. The reactor according to claim 1 ,
wherein the winding wires included in the wound portions are different, and
the connecting portion includes a portion that directly or indirectly joins end portions of the winding wires.

4. The reactor according to claim 1 ,
wherein the wound portions are connected such that magnetic fluxes passing through the wound portions flow in the same direction.

5. The reactor according to claim 1 ,
wherein the magnetic core is constituted by an assembly of a pair of split core pieces, and
each of the split core pieces includes one of the coupling portions, and two inner leg pieces that form portions of the inner leg portions, a central leg piece that forms a portion of the central leg portion, and two outer leg pieces that form portions of the outer leg portions, the inner leg pieces, central leg piece, and outer leg pieces rising from the coupling portion.

6. A magnetic core for a reactor to which a coil including two wound portions obtained by winding a winding wire and a connecting portion that connects the wound portions is assembled, the magnetic core comprising:
an inner leg portion arranged inside inner peripheries of the wound portions;
a central leg portion that is arranged apart from the inner leg portions and is provided between the inner leg portions;
two outer leg portions that are arranged apart from the inner leg portions and between which the inner leg portions and the central leg portion are provided; and
two coupling portions between which the inner leg portions, the central leg portion, and the outer leg portions, which are arranged in parallel, are sandwiched and with which these portions are coupled,
wherein the central leg portion and the inner leg portions have substantially a same length,
the outer leg portions have lengths that are longer than those of the central leg portion and the inner leg portions, and
the coupling portions are provided with cutout portions formed by cutting the coupling portions such that regions of the coupling portions in which the central leg portion is provided have lengths that are the same as those of the inner leg portions.

7. The reactor according to claim 2 , wherein the winding wires included in the wound portions are different, and
the connecting portion includes a portion that directly or indirectly joins end portions of the winding wires.

8. The reactor according to claim 2 , wherein the wound portions are connected such that magnetic fluxes passing through the wound portions flow in the same direction.

9. The reactor according to claim 3 , wherein the wound portions are connected such that magnetic fluxes passing through the wound portions flow in the same direction.

10. The reactor according to claim 3 , wherein the wound portions are connected such that magnetic fluxes passing through the wound portions flow in the same direction and wherein the magnetic core includes at least one of a composite material molded article containing magnetic powder and a resin, and a powder molded article.

11. The reactor according to claim 2 ,
wherein the magnetic core is constituted by an assembly of a pair of split core pieces, and
each of the split core pieces includes one of the coupling portions, and two inner leg pieces that form portions of the inner leg portions, a central leg piece that forms a portion of the central leg portion, and two outer leg pieces that form portions of the outer leg portions, the inner leg pieces, central leg piece, and outer leg pieces rising from the coupling portion.

12. The reactor according to claim 3 ,
wherein the magnetic core is constituted by an assembly of a pair of split core pieces, and
each of the split core pieces includes one of the coupling portions, and two inner leg pieces that form portions of the inner leg portions, a central leg piece that forms a portion of the central leg portion, and two outer leg pieces that form portions of the outer leg portions, the inner leg pieces, central leg piece, and outer leg pieces rising from the coupling portion.

13. The reactor according to claim 3 ,
wherein the magnetic core is constituted by an assembly of a pair of split core pieces, and
each of the split core pieces includes one of the coupling portions, and two inner leg pieces that form portions of the inner leg portions, a central leg piece that forms a portion of the central leg portion, and two outer leg pieces that form portions of the outer leg portions, the inner leg pieces, central leg piece, and outer leg pieces rising from the coupling portion, and
wherein the magnetic core includes at least one of a composite material molded article containing magnetic powder and a resin, and a powder molded article.

14. The reactor according to claim 4 ,
wherein the magnetic core is constituted by an assembly of a pair of split core pieces, and
each of the split core pieces includes one of the coupling portions, and two inner leg pieces that form portions of the inner leg portions, a central leg piece that forms a portion of the central leg portion, and two outer leg pieces that form portions of the outer leg portions, the inner leg pieces, central leg piece, and outer leg pieces rising from the coupling portion.

15. The reactor according to claim 4 ,
wherein the winding wires included in the wound portions are different, and
the connecting portion includes a portion that directly or indirectly joins end portions of the winding wires, and
wherein the magnetic core is constituted by an assembly of a pair of split core pieces, and
each of the split core pieces includes one of the coupling portions, and two inner leg pieces that form portions of the inner leg portions, a central leg piece that forms a portion of the central leg portion, and two outer leg pieces that form portions of the outer leg portions, the inner leg pieces, central leg piece, and outer leg pieces rising from the coupling portion.

16. The reactor according to claim 4 ,
wherein the magnetic core include

Assignees

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

Inventors

• Inaba Kazuhiro
• Zheng Xiaoguang

Classifications

• H01F27/255 Primary

  made from particles (H01F27/26 takes precedence) · CPC title

• H01F27/2823

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F27/263 Primary

  Fastening parts of the core together · CPC title

• H01F37/00

  Fixed inductances not covered by group H01F17/00 · CPC title