WO2015159640A1 - Dispositif électronique et procédé de fabrication de dispositif électronique - Google Patents

Dispositif électronique et procédé de fabrication de dispositif électronique Download PDF

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Publication number
WO2015159640A1
WO2015159640A1 PCT/JP2015/058192 JP2015058192W WO2015159640A1 WO 2015159640 A1 WO2015159640 A1 WO 2015159640A1 JP 2015058192 W JP2015058192 W JP 2015058192W WO 2015159640 A1 WO2015159640 A1 WO 2015159640A1
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WO
WIPO (PCT)
Prior art keywords
core
case
inner bottom
resin
lowermost
Prior art date
Application number
PCT/JP2015/058192
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English (en)
Japanese (ja)
Inventor
辰哉 上松
Original Assignee
株式会社 豊田自動織機
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
Application filed by 株式会社 豊田自動織機 filed Critical 株式会社 豊田自動織機
Publication of WO2015159640A1 publication Critical patent/WO2015159640A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings

Definitions

  • the present invention relates to an electronic device including a core and a coil wound around the core, such as a reactor and a transformer, and a case in which the induction device is housed and filled with resin. It relates to a manufacturing method.
  • an electronic device described in Patent Literature 1 includes a core and a coil wound around the core, an induction device such as a reactor or a transformer, and a metal case that houses the induction device.
  • the induction device is fixed to the case by a resin (potting resin) filled in the case.
  • the resin secures insulation between the coil and the case, and heat from the induction device is radiated to the case via the resin, thereby suppressing an increase in temperature of the induction device.
  • an electronic device is manufactured by filling a case with a resin in a state where an induction device is accommodated in the case.
  • the resin hardly penetrates between the bottom surface of the core placed on the inner bottom surface of the case and the inner bottom surface of the case, and air is easily trapped. That is, air may remain as bubbles between the inner bottom surface of the case and the bottom surface of the core. Due to the bubbles, the heat dissipation from the induction device to the case through the resin varies, and the heat dissipation of the induction device is deteriorated.
  • An object of the present invention is to provide an electronic device with good heat dissipation of the induction device and a method for manufacturing the electronic device.
  • An electronic device that solves the above-described problem has a core and a coil wound around the core, the core has an induction device having a bottom surface and a side surface, an inner bottom surface, and contacts a part of the core A case containing the guidance device; and a resin filled in the case; the bottom surface of the core is opposed to the inner bottom surface of the case, and the bottom surface of the core is closest to the inner bottom surface of the case. And a spacing portion extending from the bottom surface toward the side surface of the core and extending away from the inner bottom surface of the case.
  • An electronic device manufacturing method that solves the above-described problem has a core and a coil wound around the core, the induction device having a bottom surface and a side surface, and a case having an inner bottom surface.
  • the guide device is housed in the case.
  • derivation apparatus of FIG. FIG. 3 is an exploded perspective view of the guidance device in FIG. 2.
  • (A) is sectional drawing which shows the state of the reactor apparatus after a filling process
  • (b) is sectional drawing which shows the state of the reactor apparatus after an accommodation process
  • (c) is a cross section which shows the state of the reactor apparatus after a refilling process Figure.
  • (A) is a perspective view which shows the induction
  • (B) is a perspective view which shows the induction
  • (C) is a perspective view which shows the induction
  • the reactor device 10 includes a guidance device 11 and a case 12 that houses the guidance device 11.
  • the induction device 11 has two cores, that is, a first core 21 and a second core 22, and two coils, that is, a first coil 31 and a second coil 32.
  • the case 12 has an opening and an inner bottom surface 12a, has a rectangular box shape, and is made of metal (in this embodiment, made of aluminum).
  • the induction device 11 is accommodated in the case 12 such that the first core 21 is located between the second core 22 and the inner bottom surface 12a of the case 12. Therefore, the bottom surface 21 e of the first core 21 faces the inner bottom surface 12 a of the case 12.
  • the first core 21 and the second core 22 are U-shaped cores.
  • the first core 21 and the second core 22 are magnetic bodies and are formed of a dust core.
  • the first core 21 includes a main body portion 21a having a substantially long hexagonal shape in plan view, a columnar first leg portion 21b extending from one longitudinal end of the main body portion 21a toward the second core 22, and a main body portion 21a.
  • a columnar second leg portion 21c extending from the other end in the longitudinal direction toward the second core 22 is provided.
  • the first core 21 has first side surfaces 21d located at both longitudinal ends of the main body portion 21a and second side surfaces 21f located at both lateral ends of the main body portion 21a.
  • the pair of second side surfaces 21f extend parallel to each other along the longitudinal direction of the main body portion 21a.
  • Each first side surface 21d is continuous with the pair of second side surfaces 21f and bulges away from the pair of second side surfaces 21f gradually in the longitudinal direction of the main body portion 21a.
  • the second core 22 includes a main body portion 22a having a substantially long hexagonal shape in plan view, a columnar first leg portion 22b extending from one end in the longitudinal direction of the main body portion 22a toward the first core 21, and a main body portion 22a.
  • a columnar second leg portion 22 c extending from the other end in the longitudinal direction toward the first core 21 is provided.
  • the second core 22 has first side surfaces 22d located at both longitudinal ends of the main body portion 22a and second side surfaces 22f located at both lateral ends of the main body portion 22a.
  • the pair of second side surfaces 22f extend parallel to each other along the longitudinal direction of the main body portion 22a.
  • Each first side surface 22d is continuous with the pair of second side surfaces 22f and bulges away from the pair of second side surfaces 22f gradually in the longitudinal direction of the main body portion 22a.
  • the first core 21 has the same shape as the second core 22.
  • the front end surfaces in the extending direction of the first leg portions 21 b and 22 b face each other, and the front end surfaces in the extending direction of the second leg portions 21 c and 22 c face each other.
  • the gap plate 13 is interposed between the front end surfaces of the first leg portions 21b and 22b and between the front end surfaces of the second leg portions 21c and 22c.
  • Each gap plate 13 is a non-magnetic material (for example, ceramic) and is formed in a disk shape having the same outer diameter as the first leg portions 21b and 22b and the second leg portions 21c and 22c.
  • the gap plate 13 forms a gap between the front end surfaces of the first leg portions 21b and 22b and between the front end surfaces of the second leg portions 21c and 22c.
  • the first bobbin 41 is attached to the first core 21, and the second bobbin 42 is attached to the second core 22.
  • the first bobbin 41 and the second bobbin 42 are made of resin.
  • the first bobbin 41 includes a flat plate portion 41a, a cylindrical first cylindrical portion 41b protruding from the flat plate portion 41a, and a cylindrical second cylindrical portion 41c protruding from the flat plate portion 41a.
  • the first leg portion 21b of the first core 21 is inserted into the first cylindrical portion 41b, and the second leg portion 21c of the first core 21 is inserted into the second cylindrical portion 41c.
  • the second bobbin 42 includes a flat plate portion 42a, a cylindrical first cylindrical portion 42b protruding from the flat plate portion 42a, and a cylindrical second cylindrical portion 42c protruding from the flat plate portion 42a.
  • the first leg portion 22b of the second core 22 is inserted into the first cylindrical portion 42b, and the second leg portion 22c of the second core 22 is inserted into the second cylindrical portion 42c.
  • the first and second bobbins 41 and 42 are such that the protruding end portions of the first tubular portions 41b and 42b face each other, and the protruding end portions of the second tubular portions 41c and 42c face each other. Is arranged.
  • the first coil 31 has an annular shape and is wound around the first cylindrical portions 41b and 42b through which the first leg portions 21b and 22b are inserted.
  • the second coil 32 has an annular shape and is wound around second cylindrical portions 41c and 42c through which the second leg portions 21c and 22c are inserted.
  • the first and second coils 31 and 32 are formed by edgewise bending a single conductive plate, respectively, and the tip of the first coil 31 is connected to the tip of the second coil 32 and the connecting portion 33. It is connected with.
  • the wound second coil 32 is disposed adjacent to the radial direction, and a connecting portion 33 is provided in a gap between the coils 31 and 32.
  • the winding direction of the first coil 31 is different from the winding direction of the second coil 32.
  • the first and second coils 31 and 32 may be integrally formed by bending one conductive plate edgewise.
  • the bottom surface 21e of the first core 21 has a lowermost portion 25 at the center thereof.
  • the lowermost portion 25 is a portion of the bottom surface 21e that is closest to the inner bottom surface 12a of the case 12.
  • the lowermost portion 25 has a flat surface extending over the entire short direction of the main body portion 21a. The lowermost portion 25 contacts the inner bottom surface 12 a of the case 12.
  • the bottom surface 21 e of the first core 21 has a pair of separation portions 26, and the separation portions 26 are formed from both side edges located in the longitudinal direction of the main body portion 21 a in the lowermost portion 25.
  • Each side surface 21d extends away from the inner bottom surface 12a of the case 12 toward the side surface 21d. That is, each separation portion 26 extends linearly from the lowermost portion 25 toward the first side surface 21d.
  • the inclination angles ⁇ 1 of the two separating portions 26 with respect to the lowermost portion 25 are the same.
  • the upper surface 22 e of the second core 22 is also applied to the uppermost portion 27 corresponding to the lowermost portion 25 of the first core 21 and the pair of first cores 21 on the upper surface 22 e of the first core 21.
  • a pair of separation portions 28 corresponding to the separation portion 26 is formed.
  • a filling process is first performed. That is, the resin 29 is filled in the case 12 in advance so that at least the pair of separation portions 26 are immersed in the resin 29 (for example, epoxy resin) when the guidance device 11 is accommodated in the case 12.
  • the resin 29 for example, epoxy resin
  • an accommodation step is performed after the filling step. That is, the guidance device 11 is accommodated in the case 12.
  • the induction device 11 is immersed in the resin 29 in order from the lowermost portion 25.
  • the resin 29 filled in the case 12 in advance between the inner bottom surface 12a of the case 12 and the bottom surface 21e of the first core 21 is separated from the lowermost portion 25 of the first core 21 via the separating portion 26. It penetrates toward the first side surface 21d.
  • the air bubbles existing between the inner bottom surface 12 a of the case 12 and the bottom surface 21 e of the first core 21 also move toward the first side surfaces 21 d along the separation portion 26. Since the specific gravity of the bubbles is lighter than the specific gravity of the resin 29, the bubbles move along the separation portion 26 toward the first side surfaces 21 d.
  • the accommodation step is performed until the lowermost portion 25 comes into contact with the inner bottom surface 12a of the case 12.
  • a refilling process is performed after an accommodation process. That is, the resin 29 is further filled in the case 12.
  • the resin 29 is filled in the case 12 until the upper surface 22 e of the second core 22 is immersed in the resin 29.
  • derivation apparatus 11 is fixed with respect to the case 12 with the resin 29 by hardening the resin 29 by heat processing, and the reactor apparatus 10 is manufactured.
  • the bottom surface 21e of the first core 21 has a pair of separation portions 26, and the separation portions 26 extend so as to be separated from the inner bottom surface 12a of the case 12 from the lowermost portion 25 toward the first side surface 21d. Yes. According to this, when the induction device 11 is immersed in the resin 29 in order from the lowermost portion 25, the resin 29 filled in the case in advance becomes the inner bottom surface 12 a of the case 12 and the bottom surface 21 e of the first core 21. Between the lowermost portion 25 of the first core 21 and the first side surface 21d through the separating portion 26.
  • the separating portion 26 extends linearly from the lowermost portion 25 toward the first side surface 21d. According to this, since the metal mold
  • the lowermost portion 25 has a flat surface shape. According to this, the area of the lowermost portion 25 that contacts the inner bottom surface 12a of the case 12 can be made relatively large so that heat can be easily transferred from the first core 21 to the case 12, and the heat dissipation of the induction device 11 can be achieved. However, an even better electronic device can be obtained.
  • the resin 29 is transferred from the lowermost portion 25 to the first side surfaces 21 d via the separating portions 26 between the inner bottom surface 12 a of the case 12 and the bottom surface 21 e of the first core 21. Penetration towards. Bubbles existing between the inner bottom surface 12a of the case 12 and the bottom surface 21e of the first core 21 follow the permeation of the resin 29 and move toward the first side surfaces 21d along the separation portions 26.
  • the specific gravity of the bubbles is lighter than the specific gravity of the resin 29, the bubbles move along the separation portion 26 toward the first side surfaces 21 d. As a result, air bubbles can be prevented from remaining between the inner bottom surface 12a of the case 12 and the bottom surface 21e of the first core 21, and thus an electronic device with good heat dissipation of the induction device 11 can be obtained. Can do.
  • the resin 12 is further filled in the case 12 as a refilling step. According to this, since the amount of the resin 29 filled in the case 12 increases, the electrical insulation, fixing, protection, waterproofing, and dustproof function of the induction device 11 can be improved.
  • the bottom surface 21e of the first core 21 has a pair of spaced portions 26A that are continuous with each other, and the spaced portion 26A is the central portion of the bottom surface 21e of the first core 21.
  • the boundary between the two separated portions 26A is the lowermost portion 25A closest to the inner bottom surface 12a of the case 12 at the bottom surface 21e.
  • the induction device 11 may be held so as not to tilt with respect to the case 12.
  • the bottom surface 21 e of the first core 21 has a pair of spaced apart portions 26 ⁇ / b> B, and the spaced portion 26 ⁇ / b> B is a central portion of the bottom surface 21 e of the first core 21.
  • the boundary between the two separating portions 26B is the lowermost portion 25B closest to the inner bottom surface 12a of the case 12 at the bottom surface 21e.
  • the induction device 11 may be held so as not to tilt with respect to the case 12.
  • the bottom surface 21e of the first core 21 has a pair of first spacing portions 26C and a pair of second spacing portions 26D. From the central part of the bottom surface 21e of the first core 21, it extends so as to be separated from the inner bottom surface 12a of the case 12 toward both the first side surfaces 21d, and the second separation part 26D is the central part of the bottom surface 21e of the first core 21. From the inner bottom surface 12a of the case 12 toward the second side surfaces 21f. The pair of first separation portions 26 ⁇ / b> C and the pair of second separation portions 26 ⁇ / b> D are connected to each other at the center of the bottom surface 21 e of the first core 21.
  • the induction device 11 may be held so as not to tilt with respect to the case 12.
  • each separation portion 26 may extend in a curved shape from the lowermost portion 25 toward the corresponding first side surface 21 d.
  • the resin 29 permeates toward the first side surfaces 21 d along the separating portions 26 extending in a curved shape, and the inner bottom surface 12 a of the case 12 and the bottom surface of the first core 21. It can suppress that a bubble remains between 21e.
  • the resin 29 may not be filled in the case 12 in advance, and the resin 29 may be filled in the case 12 after the guide device 11 is accommodated in the case 12.
  • the resin 29 permeates along the spacing portions 26, 26 A, 26 B, 26 C, and 26 D between the inner bottom surface 12 a of the case 12 and the bottom surface 21 e of the first core 21. Therefore, air is prevented from being trapped between the inner bottom surface 12 a of the case 12 and the bottom surface 21 e of the first core 21. As a result, air bubbles can be prevented from remaining between the inner bottom surface 12a of the case 12 and the bottom surface 21e of the first core 21, and an electronic device with good heat dissipation of the induction device 11 can be obtained. it can.
  • the inclination angles ⁇ 1 of the plurality of separation portions 26, 26A, 26B, 26C, and 26D with respect to the lowermost portions 25, 25A, 25B, and 25C may be different from each other.
  • the separating portion 26 may have a shape combining a linear shape and a curved shape.
  • the reactor device 10 is configured such that the first core 21 or the second core 22 is in contact with the case 12 at a place other than the lowermost portion 25, and the lowermost portion 25 and the inner bottom surface 12a of the case 12 A resin 29 may be interposed therebetween.
  • the first core 21 may have a different shape from the second core 22.
  • the first coil 31 and the second coil 32 may be elliptical or square.
  • the induction device 11 may be one in which a coil is wound around one core. (Circle) in each said embodiment, the induction
  • derivation apparatus 11 may have three or more coils.
  • the case 12 may have a cylindrical shape having an opening and an inner bottom surface, for example.
  • the resin 29 may be a urethane resin or a silicone resin.
  • the first coil 31 and the second coil 32 may be formed by winding a round wire.
  • the present invention may be applied to electronic equipment other than the reactor device 10 (for example, electronic equipment in which a transformer, which is a guidance equipment) is housed in a case).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)

Abstract

La présente invention concerne un dispositif électronique comprenant un dispositif inductif, un boîtier et une résine. Le dispositif inductif comprend un noyau et une bobine enroulée autour dudit noyau, et le noyau comporte une surface inférieure et une surface latérale. Le boîtier, qui possède une surface inférieure intérieure, contient le dispositif inductif et contacte une partie du noyau. La résine remplit l'intérieur du boîtier. La section la plus inférieure de la surface inférieure du noyau, ladite section la plus inférieure étant la section la plus proche de la surface inférieure du noyau par rapport à la surface inférieure intérieure du boîtier, fait face à ladite surface inférieure intérieure. La surface inférieure du noyau possède également une section de distance allant en augmentant qui s'étend de sorte que, de la section la plus inférieure susmentionnée à la surface latérale du noyau, la distance entre ladite section de distance allant en augmentant et la surface inférieure intérieure du boîtier augmente.
PCT/JP2015/058192 2014-04-16 2015-03-19 Dispositif électronique et procédé de fabrication de dispositif électronique WO2015159640A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014084873A JP6217503B2 (ja) 2014-04-16 2014-04-16 電子機器
JP2014-084873 2014-04-16

Publications (1)

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WO2015159640A1 true WO2015159640A1 (fr) 2015-10-22

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JP (1) JP6217503B2 (fr)
TW (1) TW201603064A (fr)
WO (1) WO2015159640A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11594359B2 (en) * 2019-05-29 2023-02-28 Autonetworks Technologies, Ltd. Reactor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06344909A (ja) * 1993-06-04 1994-12-20 Meiden Chem Kk インピーダンスボンド
JP2010118503A (ja) * 2008-11-13 2010-05-27 Denso Corp リアクトル
JP4524805B1 (ja) * 2009-03-25 2010-08-18 住友電気工業株式会社 リアクトル
WO2012039268A1 (fr) * 2010-09-22 2012-03-29 住友電気工業株式会社 Réacteur, convertisseur et convertisseur d'énergie électrique
JP2013229527A (ja) * 2012-04-27 2013-11-07 Nec Tokin Corp リアクトル
JP2014116523A (ja) * 2012-12-12 2014-06-26 Cosel Co Ltd チョークコイル装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06344909A (ja) * 1993-06-04 1994-12-20 Meiden Chem Kk インピーダンスボンド
JP2010118503A (ja) * 2008-11-13 2010-05-27 Denso Corp リアクトル
JP4524805B1 (ja) * 2009-03-25 2010-08-18 住友電気工業株式会社 リアクトル
WO2012039268A1 (fr) * 2010-09-22 2012-03-29 住友電気工業株式会社 Réacteur, convertisseur et convertisseur d'énergie électrique
JP2013229527A (ja) * 2012-04-27 2013-11-07 Nec Tokin Corp リアクトル
JP2014116523A (ja) * 2012-12-12 2014-06-26 Cosel Co Ltd チョークコイル装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11594359B2 (en) * 2019-05-29 2023-02-28 Autonetworks Technologies, Ltd. Reactor

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JP6217503B2 (ja) 2017-10-25
TW201603064A (zh) 2016-01-16
JP2015204447A (ja) 2015-11-16

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