WO2015098500A1 - Dispositif électronique - Google Patents

Dispositif électronique Download PDF

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Publication number
WO2015098500A1
WO2015098500A1 PCT/JP2014/082571 JP2014082571W WO2015098500A1 WO 2015098500 A1 WO2015098500 A1 WO 2015098500A1 JP 2014082571 W JP2014082571 W JP 2014082571W WO 2015098500 A1 WO2015098500 A1 WO 2015098500A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
heat
magnetic
electronic device
bracket
Prior art date
Application number
PCT/JP2014/082571
Other languages
English (en)
Japanese (ja)
Inventor
公教 尾崎
隆宏 郡司
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 WO2015098500A1 publication Critical patent/WO2015098500A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/22—Cooling by heat conduction through solid or powdered fillings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H01F27/2852—Construction of conductive connections, of leads

Definitions

  • the present invention relates to an electronic device.
  • an electronic device has a magnetic member as disclosed in Patent Document 1, for example.
  • the magnetic member has a magnetic core and a coil wound around the magnetic core.
  • a magnetic core is comprised from the 1st core which contact
  • a sheet is interposed between the first core and the second core in order to form a magnetic gap (gap) for forming a magnetic flux flowing through the magnetic core.
  • the sheet is made of, for example, a synthetic resin having a low magnetic permeability.
  • the magnetic member generates heat not only in the coil but also in the magnetic core itself. Since the thermal conductivity of the sheet is low, the heat of the second core is difficult to be transmitted toward the first core. Therefore, heat easily accumulates in the second core, and the heat of the magnetic core cannot be efficiently radiated. Such a problem occurs when an air gap is provided between the first core and the second core instead of interposing a sheet between the first core and the second core. It occurs in the same way even if it exists.
  • An object of the present invention is to provide an electronic device that can efficiently dissipate heat of a magnetic core.
  • One aspect for achieving the above object provides an electronic device including a heat dissipating member and a magnetic member placed on the heat dissipating member.
  • the magnetic member includes a first core that is in contact with the heat radiating member, a second core that is disposed on the opposite side of the heat radiating member across the first core, and the magnetic member.
  • the electronic device is provided between the first core and the second core, a magnetic gap for forming a magnetic flux flowing through the magnetic core, and heat of the second core to the heat dissipation member And a heat transfer section for transferring.
  • FIG. 1 is sectional drawing which shows the electronic device in 1st Embodiment
  • (b) is 2-2 sectional view taken on the line in Fig.1 (a). Sectional drawing which shows the electronic device in 2nd Embodiment.
  • the electronic apparatus 10 includes a heat radiating member 11 formed of metal, for example, aluminum, and a magnetic member 12 placed on the heat radiating member 11.
  • the magnetic member 12 includes a magnetic core 13 composed of a first core 20 in contact with the heat radiating member 11 and a second core 30 disposed on the opposite side of the heat radiating member 11 across the first core 20.
  • the second core 30, the first core 20, and the heat dissipation member 11 are stacked in this order.
  • the first core 20 is disposed between the second core 30 and the heat dissipation member 11.
  • the electronic device 10 includes a flat insulating substrate 50, an annular metal plate 51 bonded to the surface (first surface) of the insulating substrate 50, and an annular metal plate bonded to the back surface (second surface) of the insulating substrate 50.
  • a substrate 15 made of a metal plate 52 is provided.
  • Each of the metal plates 51 and 52 is made of a flat copper plate having a thickness of 0.5 mm and is patterned into a predetermined shape. And by arrange
  • the substrate 15 is supported by the heat radiating member 11 via the heat transfer sheet 16.
  • the heat dissipating member 11 has a fluid path 11a through which a fluid passes as a cooling medium.
  • a fluid passes as a cooling medium.
  • water is used as the cooling medium.
  • the heat radiating member 11 radiates heat by removing the heat transmitted from the member such as the magnetic member 12 to the heat radiating member 11 by the fluid passing through the fluid path 11a.
  • a housing recess 40 for housing the first core 20 is formed on the upper surface of the heat dissipation member 11. The first core 20 is positioned by being housed in the housing recess 40.
  • the first core 20 is made of ferrite.
  • the first core 20 has a substantially rectangular parallelepiped shape.
  • the second core 30 is made of ferrite.
  • the second core 30 has a substantially rectangular parallelepiped shape and a C-shape in a side sectional view.
  • a square-shaped notch 30k is formed on a bottom surface 30e that is a surface facing the first core 20 in the second core 30.
  • a space 19 through which a part of the substrate 15 passes is formed between the upper surface 20b of the first core 20 facing the second core 30 and the inner surface of the notch 30k of the second core 30. Has been.
  • the sheet 14 is made of a synthetic resin having a low magnetic permeability.
  • the heat dissipating member 11 is integrally formed with an extending portion 11f.
  • the extending portion 11 f extends from the upper surface of the heat radiating member 11 to substantially the same height as the upper surface 30 b that is the surface of the second core 30 opposite to the first core 20.
  • the upper surface of the extending portion 11f and the upper surface 30b of the second core 30 are located at the same height. That is, the upper surface of the extending portion 11f and the upper surface 30b of the second core 30 are flush with each other.
  • the 1st core 20 and the 2nd core 30 are attached with respect to the heat radiating member 11 by the bracket 17 supported by the extension part 11f.
  • the bracket 17 is formed by bending a rectangular plate-like metal, for example, iron or copper.
  • a support portion 17a supported by the extending portion 11f is formed at the base end portion of the bracket 17.
  • the support portion 17a has a flat plate shape and is fastened to the extending portion 11f by a bolt 18. And the contact of the support part 17a and the extension part 11f is ensured by the fastening of the volt
  • FIG. A contact portion 17 b is formed at the tip of the bracket 17 so as to be in contact with the upper surface 30 b of the second core 30.
  • the contact portion 17b has a curved shape that swells toward the upper surface 30b of the second core 30.
  • the second core 30 is placed on the first core 20 via the sheet 14, and the contact portion 17 b of the bracket 17 and the second core 30 are placed.
  • the upper surface 30b of the core 30 is in close contact.
  • the first core 20 and the second core 30 are sandwiched between the contact portion 17b of the bracket 17 and the bottom wall 40e of the housing recess 40 by the bracket 17 and the heat dissipation member 11. In this way, the first core 20 and the second core 30 are attached to the heat dissipation member 11.
  • the bottom surface 20e of the first core 20 opposite to the second core 30 is in close contact with the bottom wall 40e of the housing recess 40, so that the first core 20 and the heat dissipation member 11 are heated.
  • the contact portion 17b of the bracket 17 and the upper surface 30b of the second core 30 are in close contact with each other, whereby the second core 30 and the extending portion 11f of the heat dissipation member 11 are thermally coupled via the bracket 17.
  • the bracket 17 functions as a heat transfer unit that transfers the heat of the second core 30 to the heat dissipation member 11.
  • the heat of the second core 30 can be transmitted to the heat radiating member 11 via the bracket 17 without passing through the sheet 14 and the first core 20.
  • the heat of the second core 30 is not transferred linearly to the heat dissipation member 11 via the seat 14 and the first core 20, but is bypassed via the bracket 17 to the heat dissipation member 11. It becomes possible to communicate.
  • the heat of the first core 20 is transmitted from the bottom surface 20 e of the first core 20 to the heat radiating member 11 and is radiated by the heat radiating member 11. Further, since the substrate 15 is supported by the heat radiating member 11 via the heat transfer sheet 16, heat generated from the metal plates 51 and 52 functioning as coils is radiated to the heat radiating member 11.
  • the bracket 17 is provided as a heat transfer part that transfers the heat of the second core 30 to the heat dissipation member 11. According to this, the heat of the second core 30 can be transmitted to the heat radiating member 11 via the bracket 17. Therefore, even if the sheet 14 forming a magnetic gap for forming a magnetic flux flowing through the magnetic core 13 is interposed between the first core 20 and the second core 30, Accumulation of heat can be suppressed. As a result, the heat of the magnetic core 13 can be radiated efficiently.
  • the bracket 17 for attaching the first core 20 and the second core 30 to the heat radiating member 11 functions as a heat transfer unit.
  • the bracket 17 serves both as an attachment function for the first core 20 and the second core 30 and a heat transfer function for the second core 30. According to this, compared with the case where a heat transfer part is provided separately, the number of parts can be reduced.
  • the bracket 17 is integrally formed with the heat radiating member 11 and supported by an extending portion 11f extending to almost the same height as the upper surface 30b of the second core 30. Therefore, since the upper surface 30b of the second core 30 and the upper surface of the extending portion 11f are flush with each other, the bracket 17 can be shortened as much as possible, and the heat transfer path from the second core 30 to the heat dissipation member 11 can be reduced. It can be as short as possible. As a result, the heat of the second core 30 can be efficiently radiated to the heat radiating member 11.
  • the electronic device 10 includes a substrate 15 having an insulating substrate 50 and metal plates 51 and 52 bonded to the insulating substrate 50. And the metal plates 51 and 52 function as a coil because the board
  • the substrate 15 is supported by the heat dissipation member 11 via the heat transfer sheet 16. Therefore, the heat transfer to the heat radiating member 11 in the heat generated from the metal plates 51 and 52 functioning as coils can be promoted by the heat transfer sheet 16, so that the heat generated from the metal plates 51 and 52 can be more efficiently performed. It can dissipate heat.
  • first core 20 and the second core 30 are fixed, for example, the following procedure may be considered.
  • the first core 20 and the second core 30 are disposed so as to face each other so that the first core 20 and the second core 30 are not displaced from each other.
  • the first core 20 and the second core 30 are wound together with tape and integrated in advance.
  • the first core 20 and the second core 30 integrated with the tape are placed on the heat dissipation member 11.
  • the thermal resistance is increased by the tape, and the heat dissipation is deteriorated. Therefore, in the present embodiment, the first core 20 is accommodated in the accommodating recess 40 and positioned, and the second core 30 is placed on the positioned first core 20 via the sheet 14. Thus, the first core 20 and the second core 30 are attached to the heat dissipation member 11 by the bracket 17. Therefore, it is not necessary to wind and integrate the first core 20 and the second core 30 in advance so that the first core 20 and the second core 30 are not displaced from each other. There is no increase in thermal resistance.
  • the electronic apparatus 10 has a magnetic member 12A.
  • the magnetic member 12 ⁇ / b> A includes a magnetic core 13 ⁇ / b> A composed of a first core 20 that is in contact with the heat radiating member 11 and a second core 30 ⁇ / b> A that is disposed on the opposite side of the heat radiating member 11 across the first core 20.
  • a magnetic core 13 ⁇ / b> A composed of a first core 20 that is in contact with the heat radiating member 11 and a second core 30 ⁇ / b> A that is disposed on the opposite side of the heat radiating member 11 across the first core 20.
  • the second core 30A has a substantially rectangular parallelepiped shape and an E shape in a side sectional view.
  • the second core 30A includes a flat plate portion 300 having a substantially flat plate shape, a pair of first leg portions 301 having a column shape extending from both ends of the flat plate portion 300 toward the first core 20, and a center of the flat plate portion 300.
  • the second leg portion 302 has a columnar shape extending toward the first core 20.
  • the front end surface of the first leg 301 is in contact with the upper surface 20 b of the first core 20.
  • a magnetic gap 60 is provided between the distal end surface of the second leg portion 302 and the first core 20.
  • a heat dissipation grease 61 is provided in the magnetic gap 60.
  • the heat radiation grease 61 for example, silicon grease is used.
  • Two substrates 15 are arranged around the magnetic core 13A.
  • the first leg 301, the flat plate 300, the second leg 302, and the upper surface 20b of the first core 20 form a space 19A through which a part of the corresponding substrate 15 passes.
  • the other first leg 301, flat plate 300, second leg 302, and upper surface 20b of the first core 20 form a space 19B through which a part of the corresponding substrate 15 passes.
  • substrate 15 are functioning as a coil wound by the magnetic core 13A.
  • the contact portion 17b of the bracket 17 is disposed at a position facing the magnetic gap 60 via the second core 30A.
  • the operation of the second embodiment will be described. Due to the presence of the magnetic air gap 60, the heat of the second core 30 ⁇ / b> A is difficult to be transmitted to the first core 20 through the magnetic air gap 60. Therefore, the heat possessed by the second core 30 ⁇ / b> A is likely to be accumulated in a portion facing the magnetic gap 60. However, the contact portion 17b of the bracket 17 is disposed at a position facing the magnetic gap 60 via the second core 30A. Thereby, the heat that is hardly transmitted to the first core 20 due to the presence of the magnetic air gap 60 and is to be accumulated in the second core 30 ⁇ / b> A is efficiently radiated to the heat radiating member 11 through the bracket 17.
  • the heat release grease 61 since the heat release grease 61 is provided in the magnetic gap 60, the heat of the second core 30 ⁇ / b> A is transmitted to the first core 20 through the heat release grease 61, and The heat is transmitted from the bottom surface 20 e to the heat radiating member 11. Therefore, in this embodiment, in addition to the bracket 17, the heat dissipation grease 61 also functions as a heat transfer unit that transfers the heat of the second core 30 ⁇ / b> A to the heat dissipation member 11. According to this, even if it has the magnetic space
  • the contact portion 17b of the bracket 17 is disposed at a position facing the magnetic gap 60 via the second core 30A. According to this, due to the presence of the magnetic air gap 60, heat that is hardly transmitted to the first core 20 and is to be accumulated in the second core 30 ⁇ / b> A can be efficiently radiated to the heat radiating member 11 via the bracket 17. it can.
  • the heat dissipation grease 61 is provided in the magnetic gap 60. According to this, the heat which the 2nd core 30A has can be transmitted to the thermal radiation member 11 via the thermal radiation grease 61 and the 1st core 20, and the 1st core 20 and the 2nd core 30A Even if there is a magnetic gap 60 for forming a magnetic flux flowing through the magnetic core 13 ⁇ / b> A between them, heat can be prevented from being accumulated in the second core 30 ⁇ / b> A. As a result, the heat of the magnetic core 13A can be radiated efficiently.
  • the bracket 17 does not need to function as a heat transfer part.
  • the contact part 17b of the bracket 17 may be arrange
  • the upper surface of the extending portion 11f may be slightly higher than the upper surface 30b of the second cores 30 and 30A. In the above embodiments, the upper surface of the extending portion 11f may be slightly lower than the upper surface 30b of the second cores 30 and 30A.
  • the housing recess 40 may be omitted, and the first core 20 may be placed on the upper surface of the heat dissipation member 11.
  • the number of metal plates 51 and 52 bonded to the front and back surfaces of the insulating substrate 50 is not particularly limited and may be arbitrarily changed.
  • the substrate 15 is disposed around the magnetic cores 13 and 13A, and the metal plates 51 and 52 function as coils. Instead, a bobbin in which a coil is wound around the magnetic cores 13 and 13A may be disposed.
  • the first core 20 and the second cores 30 and 30A may be formed of, for example, a Si steel plate instead of ferrite. In each embodiment described above, two or more second cores 30 and 30A may be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Transformer Cooling (AREA)

Abstract

L'invention porte sur un dispositif électronique qui contient un élément de dissipation thermique et un élément magnétique placé sur ledit élément de dissipation thermique. L'élément magnétique comprend un noyau magnétique et une bobine enroulée autour dudit noyau magnétique. Le noyau magnétique comprend un premier noyau qui est en contact avec l'élément de dissipation thermique et un second noyau situé sur le côté du premier noyau qui est tourné à l'opposé de l'élément de dissipation thermique. Le dispositif électronique possède un entrefer magnétique pour former un flux magnétique qui circule à travers le noyau magnétique, ledit entrefer magnétique étant situé entre le premier noyau et le second noyau, et une partie de transmission de chaleur qui transmet une chaleur depuis le second noyau vers l'élément de dissipation thermique.
PCT/JP2014/082571 2013-12-26 2014-12-09 Dispositif électronique WO2015098500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013269559A JP2015126106A (ja) 2013-12-26 2013-12-26 電子機器
JP2013-269559 2013-12-26

Publications (1)

Publication Number Publication Date
WO2015098500A1 true WO2015098500A1 (fr) 2015-07-02

Family

ID=53478365

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Application Number Title Priority Date Filing Date
PCT/JP2014/082571 WO2015098500A1 (fr) 2013-12-26 2014-12-09 Dispositif électronique

Country Status (2)

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JP (1) JP2015126106A (fr)
WO (1) WO2015098500A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6737225B2 (ja) * 2017-04-24 2020-08-05 株式会社豊田自動織機 電力変換装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010003926A (ja) * 2008-06-20 2010-01-07 Panasonic Electric Works Co Ltd 電子機器
JP2010010452A (ja) * 2008-06-27 2010-01-14 Toyota Industries Corp トランスコアの固定具
JP2011077328A (ja) * 2009-09-30 2011-04-14 Tdk Corp トランス及びスイッチング電源装置
JP2011253877A (ja) * 2010-06-01 2011-12-15 Denso Corp 磁気部品ユニット及び磁気部品固定構造
JP2012134424A (ja) * 2010-12-24 2012-07-12 Toyota Industries Corp 誘導機器
WO2012137494A1 (fr) * 2011-04-06 2012-10-11 株式会社神戸製鋼所 Réactance et procédé d'évaluation de celle-ci
JP2013168401A (ja) * 2012-02-14 2013-08-29 Mitsubishi Electric Corp 車載用電力変換装置
JP2014086432A (ja) * 2012-10-19 2014-05-12 Mitsubishi Electric Corp コイル装置
JP2014090523A (ja) * 2012-10-29 2014-05-15 Mitsubishi Electric Corp スイッチング電源装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010003926A (ja) * 2008-06-20 2010-01-07 Panasonic Electric Works Co Ltd 電子機器
JP2010010452A (ja) * 2008-06-27 2010-01-14 Toyota Industries Corp トランスコアの固定具
JP2011077328A (ja) * 2009-09-30 2011-04-14 Tdk Corp トランス及びスイッチング電源装置
JP2011253877A (ja) * 2010-06-01 2011-12-15 Denso Corp 磁気部品ユニット及び磁気部品固定構造
JP2012134424A (ja) * 2010-12-24 2012-07-12 Toyota Industries Corp 誘導機器
WO2012137494A1 (fr) * 2011-04-06 2012-10-11 株式会社神戸製鋼所 Réactance et procédé d'évaluation de celle-ci
JP2013168401A (ja) * 2012-02-14 2013-08-29 Mitsubishi Electric Corp 車載用電力変換装置
JP2014086432A (ja) * 2012-10-19 2014-05-12 Mitsubishi Electric Corp コイル装置
JP2014090523A (ja) * 2012-10-29 2014-05-15 Mitsubishi Electric Corp スイッチング電源装置

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Publication number Publication date
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