WO2013145585A1 - Reactor apparatus - Google Patents

Reactor apparatus Download PDF

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Publication number
WO2013145585A1
WO2013145585A1 PCT/JP2013/001483 JP2013001483W WO2013145585A1 WO 2013145585 A1 WO2013145585 A1 WO 2013145585A1 JP 2013001483 W JP2013001483 W JP 2013001483W WO 2013145585 A1 WO2013145585 A1 WO 2013145585A1
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WO
WIPO (PCT)
Prior art keywords
coil
case
inner
outer case
inner case
Prior art date
Application number
PCT/JP2013/001483
Other languages
French (fr)
Japanese (ja)
Inventor
篤志 山島
山口 雄司
秀藏 磯田
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2012070017A priority Critical patent/JP2013201376A/en
Priority to JP2012-070017 priority
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2013145585A1 publication Critical patent/WO2013145585A1/en

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00Fixed inductances not covered by group H01F17/00
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • H01F27/025Constructional details relating to cooling

Abstract

This reactor apparatus is capable of having both the excellent heat dissipating characteristics and insulating characteristics. In the apparatus, a metal outer case (300), which holds a coil (100) of a reactor such that the whole coil is covered with the outer case, has an inner case (200) between the outer case (300) and the coil (100) in order to hold the coil (100) by keeping a sufficient insulation distance from any part of a case inner wall, said inner case being formed of an insulating resin having high heat dissipating characteristics. Furthermore, an insulating potting resin material is flowed into a space between the outer case (300) and the coil (100).

Description

Reactor device

The present invention relates to a reactor device including a coil.

In recent years, plug-in HEVs (Hybrid Electric Vehicles) and EVs (Electric Vehicles) have become widespread. The EV or the plug-in HEV is equipped with an on-vehicle charger that converts an external AC power source into a direct current and outputs it to a vehicle storage battery.

A reactor device equipped with a coil for power factor improvement or smoothing is mounted on an in-vehicle charger for HEV or EV.

A very high voltage of about 400 volts is applied to a reactor device used in an on-vehicle charger for HEV or EV. For this reason, a coil becomes high temperature by heat_generation | fever. In this case, in order to prevent overheating of the coil in the in-vehicle charger, it is important to give the reactor device very high heat dissipation. At the same time, it is important to provide reliable electrical insulation between the coil and its housing member.

As a reactor device provided with a coil, the one disclosed in Patent Document 1 is known. Patent Document 1 discloses a transformer having a coil bobbin around which a coil is wound and a magnetic core. The transformer body is held in an insulating protective case having several protruding portions. In this state, the silicon casting resin is filled and cured in the insulating protective case so as to cover the transformer body and the protrusions.

Japanese Utility Model Publication No. 6-44117

However, since the reactor device of Patent Document 1 uses a case made of a resin having low thermal conductivity to ensure insulation, heat dissipation from the side surface and the bottom surface is insufficient. Even if the case is replaced with a case made of a metal having high thermal conductivity, the positioning to ensure a sufficient insulation distance between the metallic case and the entire circumference of the coil is strictly performed. Difficult, heat dissipation and insulation may not be ensured.

An object of the present invention is to provide a reactor device that can achieve both heat dissipation and insulation.

The reactor device of the present invention includes a coil that is formed by winding a conductor wire in an annular shape and generates a magnetic flux when energized, and an inner case that is formed into a cylindrical shape with one end opened by a heat-dissipating insulating material, and accommodates the coil. The metal is formed into a cylindrical shape with one end opened, and the space between the outer case accommodating the inner case and the inner and outer sides of the inner case is filled between the coil and the inner wall of the outer case. And a potting resin material made of a flame-retardant insulating material.

The present invention uses an insulating resin with high heat dissipation as a material, and an inner case for holding the coil is disposed between the outer case and the coil, so that the coil is placed at an optimum position inside the outer case with strict positioning accuracy. Can be retained. As a result, a sufficient insulation distance can be secured between the entire inner wall of the metal outer case and the entire surface of the conductive coil. At the same time, high heat dissipation can be ensured by the potting resin material filled in the space between the coil and the inner wall of the outer case.

The perspective view of the reactor apparatus which concerns on one embodiment of this invention 1 is an exploded perspective view of a reactor device according to an embodiment of the present invention. The perspective view of the inner side case of the reactor apparatus which concerns on one embodiment of this invention Six views of an inner case of a reactor device according to an embodiment of the present invention The perspective view of the outer case of the reactor apparatus which concerns on one embodiment of this invention Six views of the outer case of the reactor device according to one embodiment of the present invention

(Outline of this embodiment)
Hereinafter, an embodiment of a reactor device in the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a reactor device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the reactor device according to the embodiment of the present invention. The reactor device according to the present embodiment includes an inner case 200 and an outer case 300, and holds the coil 100.

The coil 100 is an inductance element that constitutes a reactor device, and is connected to a lead wire. The coil 100 is, for example, a toroidal coil. A hole 110 is formed at the center of the toroidal coil.

The inner case 200 is formed in a cylindrical shape from a resin material having high heat dissipation and accommodates the coil 100. The inner case 200 is disposed between the coil 100 and the outer case 300, thereby ensuring a sufficient insulation distance between the conductive coil 100 and the metal outer case 300.

The outer case 300 is formed as a cylindrical housing with a metal material having high heat dissipation and accommodates the inner case 200. An example of the metal used as the material of the outer case is aluminum. The outer case 300 serves to efficiently release the heat generated in the coil 100 to the outside.

The potting resin material (not shown) is made of a flame retardant insulating material, and is poured into a gap between the outer case 300 and the coil 100 and filled and cured across the inside and outside of the inner case 200. It is a fluid insulating material. The hardened potting resin material serves to fix the inner case 200 and the coil 100 accommodated in the outer case 300 in a fixed position, and to provide insulation and thermal conductivity between the coil 100 and the outer case 300 by the inner case 200. Play a role to replenish.

As illustrated in FIG. 2, the coil 100 is accommodated in the inner case 200, and then the inner case 200 that accommodates the coil 100 is accommodated in the outer case 300, whereby the reactor device according to the present invention. Is assembled.

(Structure of inner case 200 and outer case 300)
Hereinafter, the structure of the inner case 200 and the outer case 300 will be described in detail.

FIG. 3 is a perspective view of the inner case 200, and FIG. 4 is a six-sided view of the inner case 200. 4A is a top view, FIG. 4B is a bottom view, FIG. 4C is a right side view, FIG. 4D is a front view, and FIG. 4E is a left side view.

The inner case 200 is made of a flame retardant resin, has a bottom surface portion 201 and a side surface portion 202, and is formed in a cylindrical shape with one end opened. The coil 100 is accommodated in an internal space 203 formed by the bottom surface portion 201 and the side surface portion 202.

The flame-retardant resin is typically a resin material that can withstand a high temperature of about 150 ° C., which is the rated temperature when the reactor generates heat.

The inner case 200 includes a center fixing member 206 protruding from the center of the inner case bottom surface portion 201. The center fixing member 206 is fitted into the hole 110 of the coil 100 to stably hold the coil 100 at a position apart from the center and the bottom surface 301 in the cylindrical inner space 303 of the outer case 300. .

A plurality of protruding ribs 205 are formed on the side surface portion 202 of the inner case 200 so as to protrude from the outer wall of the side surface portion 202 toward the inner wall of the outer case 300 at equal intervals. The plurality of protruding ribs 205 is a support member that has a uniform protruding amount that reaches the inner wall of the side surface portion 302 of the outer case 300 from the outer wall of the side surface portion 202 of the inner case 200 and supports the inner wall of the side surface portion 302 from the inner side. is there. The protruding rib 205 has a function of keeping the distance between the outer wall of the side surface portion 202 and the inner wall of the side surface portion 302 uniform. As a result, when the inner case 200 is disposed in the inner space 303 of the outer case 300, the cylindrical shape of the outer case 300 and the cylindrical shape of the inner case 200 are fixedly disposed concentrically with each other.

A hole 204 is provided in the side surface 202 of the inner case 200. When the potting resin material is poured into the gap between the outer case 300 and the coil 100, the hole 204 is filled and cured evenly across the inside and outside of the inner case 200 due to leakage. To do. At the same time, the hole 204 functions as an opening for efficiently releasing heat generated from the coil 100 from the inside case 200 with insufficient heat dissipation, using the potting resin material as a medium.

FIG. 5 is a perspective view of the outer case 300, and FIG. 6 is a six-sided view of the outer case 300. 6A is a top view, FIG. 6B is a bottom view, FIG. 6C is a right side view, FIG. 6D is a front view, and FIG. 6E is a left side view. The outer case 300 is entirely formed of a metal material as a cylindrical shape including a bottom surface portion 301 and a side surface portion 302, and the inner diameter of the cylindrical shape is larger than the outer diameter of the cylindrical shape of the inner case 200.

The bottom case 301 of the outer case 300 is formed with a fixing leg 311 extending outward from the outer edge of the bottom 301 in parallel to the horizontal surface of the bottom 301. The outer case 300 is fixed to a pedestal having a water-cooling mechanism inside by using screw fixing means using screws passed through holes 312 opened in the fixing legs 311.

(Reactor device assembly process)
Next, the assembly process of the reactor apparatus which concerns on one embodiment of this invention is demonstrated in detail.

First, the coil 100 is accommodated in the internal space 203 of the inner case 200. At this time, the center fixing member 206 provided on the inner case bottom surface portion 201 is fitted into the hole 110 of the coil 100 to be separated from the center portion and the bottom surface portion 301 in the cylindrical inner space 303 of the outer case 300. In this position, the coil 100 is stably held.

Next, the entire inner case 200 is accommodated in the inner space 303 of the outer case 300. At this time, the inner case 200 is fixedly arranged so that the cylindrical shape of the inner case 200 and the cylindrical shape of the outer case 300 are concentric with each other by the protruding ribs 205 provided on the inner wall of the side surface portion 202 of the inner case 200. The As a result, the coil 100 is suspended in a central portion in the inner space 303 of the outer case 300 and at a position away from the bottom surface portion 301.

Next, a potting resin material with high heat dissipation is poured into the gap between the inner surface of the outer case 300 and the coil 100 to be filled and cured. At this time, the potting resin material that has flowed into the gap between the outer case 300 and the coil 100 leaks out from the hole 204 provided in the side surface portion 202 of the inner case 200, thereby entering and leaving the inner case 200. Fill and cure evenly across.

(First effect of the present embodiment)
As described above, the reactor device according to the present embodiment can ensure high heat dissipation by the potting resin material filled in the space between the coil 100 and the inner wall of the outer case 300. At the same time, an inner case 200 made of a highly flame-retardant insulating resin tree that holds the coil is disposed between the outer case 300 and the coil 100, so that the entire inner wall of the metal outer case 300 is electrically conductive. A sufficient insulation distance from the entire surface of the coil 100 can be ensured. Specifically, the coil 100 is held at the center portion in the cylindrical internal space 303 of the outer case 300 and at a position away from the bottom surface portion 301 by the action of the center fixing member 206 provided on the inner case bottom surface portion 201. Is done. As a result, the conductive coil 100 held in the inner space 303 is not held biased to one side in the inner space 303, and the coil 100 does not move against any portion of the metal outer case side surface portion 302. However, a sufficient insulation distance can be obtained.

Even in the reactor device manufacturing process, when potting resin material is poured between the housed coil and the outer case to fill and harden, the insulation distance is more reliable than when the inner case is not provided. Can be secured. Specifically, in the manufacturing process, the arrangement position of the coil held in the outer case is shifted due to vibration or inclination applied to the outer case, so that a sufficient insulation distance between the metal outer case and the coil is obtained. It can be prevented from being lost.

For the above reasons, this embodiment uses a very simple formation method and a simple holding structure, as compared with the case of forming a support structure for supporting a coil on the inner surface of the insulation protection case. And insulation can be realized.

(Second effect of the present embodiment)
In the reactor holding structure of Patent Document 1, a large number of protrusions and ribs for supporting the transformer main body on the inner surface of the insulation protection case must be formed integrally with the case when the insulation protection case is manufactured. In addition, it is necessary to accurately position and fit the transformer main body at an appropriate position in the internal space of the insulating protective case having the complicated internal structure as described above. Therefore, the manufacturing process of the reactor holding structure is complicated, and it is difficult to maintain a high yield.

However, in the reactor device according to the present embodiment, the inner case 200 is fitted into the inner space 303, and the center fixing member 206 provided on the inner case bottom surface portion 201 is fitted into the coil hole portion 110. It can be manufactured simply by housing the coil 100.

Therefore, it is possible to easily realize a structure for stably holding the coil 100 in the outer case 300 while ensuring a sufficient insulation distance between the metal outer case 300 and the coil 100. As a result, the manufacturing process of the reactor device is greatly simplified, and the manufacturing yield can be maintained high.

(Third effect of the present embodiment)
In order to be able to be easily accommodated in an in-vehicle charger or the like of EV or HEV, the coil and its accommodation case must be miniaturized as much as possible. At that time, by adopting the above-described embodiment shown in FIG. 1 and FIG. 2 as the reactor device, it is possible to ensure a sufficient insulation distance between the storage case and the coil even when the reactor is downsized. it can. Specifically, the conductive coil is accurately placed at a central position in a very narrow space inside the miniaturized storage case by the action of the insulating inner case fitted inside the storage case. Thus, it becomes possible to hold it stably. In addition, a structure having such a high positioning accuracy can be easily formed simply by disposing the inner case 200 between the outer case 300 and the coil 100 in the manufacturing process of the reactor device.

(Fourth effect of the present embodiment)
The reactor apparatus which concerns on this invention can implement | achieve the reactor apparatus which can manufacture high heat dissipation and insulation with a simple structure and formation method not only in helical shape but in arbitrary coil shapes like a toroidal shape.

Although one embodiment of the present invention has been specifically described above, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the shape of the outer case 300 and the inner case 200 is not limited to a cylindrical shape suitable for housing the toroidal coil 100, and can be any shape that can accommodate any shape coil. The coil holding structure of the inner case 200 is not limited to the embodiment shown in FIGS. 1 and 2, and the coil 100 is stably disposed by being arranged at a center portion in the inner space of the outer case 300 and a position away from the bottom surface portion 301. Any internal structure that can be held may be used. The potting resin material used in the practice of the present invention is any resin material as long as it is a highly insulative and flame retardant resin material, such as a material mainly composed of an epoxy resin or a material mainly composed of a silicon resin. May be used.

The disclosure of the description, drawings and abstract contained in the Japanese application of Japanese Patent Application No. 2012-70017 filed on March 26, 2012 is incorporated herein by reference.

The present invention can be used as a reactor device or the like used as an inductance element for an in-vehicle charger for EVs and HEVs.

DESCRIPTION OF SYMBOLS 100 Coil 110 Hole part of coil center 200 Inner case 201 Bottom face part 202 Side part 203 Internal space 204 Hole part 205 Projection rib 206 Center fixing member 300 Outer case 301 Bottom face part 302 Side part 303 Internal space 311 Fixing leg part 312 Hole Part

Claims (4)

  1. A coil in which a conductor wire is wound in an annular shape and generates a magnetic flux by energization;
    An inner case that is formed into a cylindrical shape with one end opened by a heat dissipating insulating material, and accommodates the coil;
    The metal is formed into a cylindrical shape with one end opened, and an outer case that houses the inner case;
    A potting resin material made of a flame retardant insulating material that fills the space between the inner wall of the outer case and the coil across the inner and outer sides of the inner case,
    A reactor device comprising:
  2. The reactor device according to claim 1, wherein a hole is formed in a side surface portion of the inner case.
  3. The reactor device according to claim 1, wherein the inner case is formed with a plurality of protruding ribs with an equal amount of protrusion reaching from the side outer wall to the inner wall of the outer case on the side outer wall.
  4. The coil is a toroidal coil,
    The inner case is
    Center fixing that is formed so as to protrude from the center part of the bottom surface and holds the coil at a position spaced from the bottom part of the inner space of the outer case and the center part of the outer case by fitting in the center hole of the coil. Having a member,
    The reactor device according to claim 1.
PCT/JP2013/001483 2012-03-26 2013-03-08 Reactor apparatus WO2013145585A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012070017A JP2013201376A (en) 2012-03-26 2012-03-26 Reactor device
JP2012-070017 2012-03-26

Publications (1)

Publication Number Publication Date
WO2013145585A1 true WO2013145585A1 (en) 2013-10-03

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PCT/JP2013/001483 WO2013145585A1 (en) 2012-03-26 2013-03-08 Reactor apparatus

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WO (1) WO2013145585A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3330983A1 (en) * 2016-11-30 2018-06-06 Visedo Oy An inductive device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60254604A (en) * 1984-05-30 1985-12-16 Fuji Elelctrochem Co Ltd Winding parts
JPS6351425U (en) * 1986-09-22 1988-04-07
JPH0541110U (en) * 1991-11-07 1993-06-01 太陽誘電株式会社 Surface mount coil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60254604A (en) * 1984-05-30 1985-12-16 Fuji Elelctrochem Co Ltd Winding parts
JPS6351425U (en) * 1986-09-22 1988-04-07
JPH0541110U (en) * 1991-11-07 1993-06-01 太陽誘電株式会社 Surface mount coil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3330983A1 (en) * 2016-11-30 2018-06-06 Visedo Oy An inductive device

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Publication number Publication date
JP2013201376A (en) 2013-10-03

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