Reactor

Patent metadata

Field	Value
Publication number	US-2020357558-A1
Application number	US-201916962737-A
Country	US
Kind code	A1
Filing date	Jan 16, 2019
Priority date	Jan 17, 2018
Publication date	Nov 12, 2020
Grant date	—

Abstract

A reactor capable of suppressing a deformation of a resin material in a gap between partial cores is provided. This reactor includes: a core that includes T-shaped cores which are at least a pair of partial cores disposed via the gap therebetween; a coil attached to respective parts of the T-shaped cores; and a core casing that is a core molding member which is formed integrally by a resin material and which covers the T-shaped cores. The core casing includes the coupling portion that is provided between the T-shaped cores at a location corresponding to the gap, and the coupling portion is provided with a through-hole, and a pair of connection portions which face with each other across the through-hole and which connects a space between the T-shaped cores.

First claim

1 . A reactor comprising:
a core that comprises at least a pair of partial cores disposed via a gap therebetween; a coil attached to a part of the core; and a core molding member which is formed integrally by a resin material and which covers the pair of partial cores, wherein: the core molding member comprises a coupling portion that is provided between the pair of partial cores a location corresponding to the gap; and the coupling portion is provided with a through-hole, and a pair of connection portions which face with each other across the through-hole and which connects a space between the pair of partial cores.

2 . The reactor according to claim 1 , wherein:
the core is annular; and the coupling portion is disposed at an inner-circumference side of the annular core.

3 . The reactor according to claim 1 , further comprising:
a housing that houses therein a reactor main body comprising the core, the coil, and the core molding member; and a filler molded portion formed of a filler provided between the reactor main body and the housing, wherein one of the pair of connection portions is provided with an opening in communication with the through-hole.

4 . The reactor according to claim 3 , wherein the core molding member comprises a wall portion that comprises pieces standing upright at a location facing with each other across the opening.

5 . The reactor according to claim 3 , wherein the core molding member comprises an inclined portion formed of a resin material that becomes thin toward the opening.

6 . The reactor according to claim 1 , wherein one of the pair of connection portions comprises a pair of opposing connection portions which face with each other via a clearance in an orthogonal direction to a connection direction.

7 . The reactor according to claim 6 , wherein the other one of the pair of connection portions is disposed between the opposing connection portions so as to face with each other, and is formed by a width that is equal to or smaller than a clearance between the opposing connection portions.

8 . The reactor according to claim 1 , wherein the pair of connection portions comprises respective tabular portions in a direction orthogonal to each other.

9 . The reactor according to claim 1 , further comprising:
a housing which houses therein the reactor main body having core, the coil, and the core molding member, and a filler molded portion formed of a filler provided between the reactor main body and the housing, wherein an enlarged portion which a cross-section of a cross-sectional shape of the through-hole is provided to one of end portions of the through-holes.

10 . The reactor according to claim 1 , further comprising:
a housing which houses therein the reactor main body having core, the coil, and the core molding member, and a filler molded portion formed of a filler provided between the reactor main body and the housing, wherein enlarged portions which a cross-section of a cross-sectional shape of the through-hole are provided to both of end portions of the through-holes.

11 . The reactor according to claim 3 , wherein:
the coil includes a pair of partial coils attached across the coupling portion, and a restriction portion which restricts the clearance between a pair of the partial coils is provided to the core molding member.

12 . The reactor according to claim 3 , wherein a communication opening which is in communication with the through-hole and where the core is exposed from the core molding member is provided to the connection portion.

Assignees

• Tamura Seisakusho Kk

Inventors

• Suzuki Kotaro
• Uekusa Yasuhiro

Classifications

• H01F27/22

  Cooling by heat conduction through solid or powdered fillings · CPC title

• H01F27/022 Primary

  Encapsulation · CPC title

• H01F27/324

  Insulation between coil and core, between different winding sections, around the coil; Other insulation structures · CPC title

• H01F37/00

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

• H01F27/28

  Coils; Windings; Conductive connections · CPC title