WO2021220606A1 - Reactor - Google Patents

Reactor Download PDF

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Publication number
WO2021220606A1
WO2021220606A1 PCT/JP2021/008107 JP2021008107W WO2021220606A1 WO 2021220606 A1 WO2021220606 A1 WO 2021220606A1 JP 2021008107 W JP2021008107 W JP 2021008107W WO 2021220606 A1 WO2021220606 A1 WO 2021220606A1
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WO
WIPO (PCT)
Prior art keywords
reactor
heat
magnetic layer
winding
reactor according
Prior art date
Application number
PCT/JP2021/008107
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French (fr)
Japanese (ja)
Inventor
肇 川口
Original Assignee
株式会社村田製作所
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Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2022518628A priority Critical patent/JPWO2021220606A1/ja
Publication of WO2021220606A1 publication Critical patent/WO2021220606A1/en

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    • 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
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • This disclosure relates to reactors.
  • the reactor is provided with an iron core and a coil wound around the iron core via an insulator. Further, the reactor has a heat conductive material sheet interposed between the reactor and the coil (see, for example, Patent Document 1).
  • the above reactor dissipates the heat generated by the coil by the heat conductive material sheet to the iron core.
  • heat is generated due to the loss of the iron core, so that the temperature of the iron core rises and it is difficult to dissipate heat from the coil.
  • the purpose of the present disclosure is to provide a reactor that enables efficient heat dissipation from the coil.
  • a reactor according to one aspect of the present disclosure is a reactor that has an upper surface and a lower surface facing opposite sides and is attached with the lower surface facing the mounting surface of a heat radiating member, and is a winding formed by winding a wire rod.
  • a coil having a portion and arranged so that the winding portion is parallel to the lower surface, a non-magnetic layer covering the winding portion, and a magnetic core covering the non-magnetic layer. It has a heat transfer member that transfers heat inside the reactor toward the lower surface.
  • Sectional drawing of the reactor of 1st Embodiment. Sectional drawing of the reactor of 1st Embodiment.
  • Front view showing the reactor of the modified example A side view showing a reactor of a modified example.
  • the reactor 1 of the present embodiment is formed in a rectangular parallelepiped shape, and the upper surface 11 and the lower surface 12 facing the opposite sides and the side surfaces intersecting the upper surface 11 and the lower surface 12 and facing the opposite sides. It has side surfaces 15 and 16 that intersect 13 and 14, the upper surface 11 and the lower surface 12 and the side surfaces 13 and 14 and face opposite to each other.
  • the term "rectangular parallelepiped” includes a rectangular parallelepiped in which the corners and ridges are chamfered and a rectangular parallelepiped in which the corners and ridges are rounded. Further, unevenness or the like may be formed on a part or all of the main surface and the side surface.
  • the reactor 1 is arranged with the lower surface 12 facing the member to which the reactor 1 is attached, and is fixed to the member.
  • the member to which the reactor 1 is attached is, for example, a heat radiating member such as a heat sink.
  • the reactor 1 has two lead wires 21 and 22 extending from the side surface 13.
  • the reactor 1 has a heat transfer member 30, a magnetic core 40, a non-magnetic layer 50, and a coil 60.
  • the heat transfer member 30 has higher thermal conductivity than the magnetic core 40, such as aluminum (Al), copper (Cu), aluminum oxide (Al 2 O 3 ), aluminum nitride (AlN), and the like. Composed of good materials.
  • the heat transfer member 30 has a base plate 31 and heat dissipation columns 34 and 35.
  • the base plate 31 has a quadrangular plate-shaped base portion 32 and two fixing portions 33 extending from the base portion 32.
  • the base plate 31 has an upper surface 31a and a lower surface 31b, a side surface 31c facing the extending direction of the lead wires 21 and 22, and a side surface 31d facing the side opposite to the side surface 31c. ing.
  • the lower surface 31b of the base plate 31 constitutes the lower surface 12 of the reactor 1.
  • the heat radiation columns 34 and 35 extend upward from the upper surface 31a of the base plate 31.
  • the heat radiating columns 34 and 35 are formed in a rectangular parallelepiped shape.
  • the heat radiating column 34 has an inner side surface 34a facing the side of the heat radiating column 35, an outer surface 34b facing the side opposite to the inner side surface 34a, and an upper surface 34c.
  • the heat radiating column 35 has an inner side surface 35a facing the side of the heat radiating column 34, an outer surface 35b facing the side opposite to the inner side surface 35a, and an upper surface 35c.
  • the heat radiation columns 34 and 35 are integrated with the base plate 31. Then, as shown in FIGS.
  • the heat radiating column 34 is formed so that the outer surface 34b is flush with the side surface 31c of the base plate 31.
  • the heat radiating column 35 is formed so that the outer surface 35b is flush with the side surface 31d of the base plate 31.
  • the upper surfaces 34c and 35c of the heat radiation columns 34 and 35 are in close contact with the non-magnetic layer 50. That is, the tips of the heat radiating columns 34 and 35 extending upward from the base plate 31 are in contact with the non-magnetic layer 50.
  • the non-magnetic layer 50 is formed so as to cover the coil 60.
  • the coil 60 is a spiral coil formed by winding one wire rod.
  • the wire rod of the present embodiment is a flat wire.
  • the flat wire is a wire rod having a rectangular cross-sectional shape orthogonal to the length direction of the wire rod.
  • the "rectangle" includes a rectangle with chamfered corners and a rectangle with rounded corners.
  • the "rectangular shape” includes a shape in which unevenness is formed on a part or all of the sides, and a shape in which a part or all of the sides are curved as a whole.
  • a wire rod having a circular cross-sectional shape, an elliptical shape, or a square shape may be used as the wire rod constituting the coil.
  • a foil-shaped conductor may be used as the wire rod. Further, conductors may be laminated to form a coil.
  • the wire rod 61 constituting the coil 60 includes a core wire 61a and a coating material 61b that covers the surface of the core wire 61a.
  • the core wire 61a is made of Cu, Al, an alloy containing Cu or Al as a main component.
  • the coating material 61b is an insulating material, for example, an enamel material such as polyimide amide.
  • the coil 60 of the present embodiment is formed by using a flat wire as a wire rod and winding the flat wire edgewise.
  • the coil 60 may be formed by flatwise winding a flat wire.
  • the coil 60 includes a winding portion 62 having a winding shaft Ax, and a first drawing portion 63 and a second drawing portion 64 extending from the first end 62a and the second end 62b of the winding portion 62, respectively.
  • the first drawer portion 63 and the second drawer portion 64 form the lead wires 21 and 22 shown in FIG.
  • the winding portion 62 is formed in a quadrangular frame shape when viewed from the direction of the winding shaft Ax.
  • the corners of the winding portion 62 are formed in an arc shape (1/4 circle).
  • the shape of the winding portion 62 may be a circular shape, an elliptical shape, a polygonal shape, or the like when viewed from the direction of the winding shaft Ax.
  • the coil 60 is arranged so that the winding shaft Ax of the winding portion 62 is perpendicular to the lower surface 12 of the reactor 1.
  • the non-magnetic layer 50 is formed so as to cover the winding portion 62.
  • an insulating resin such as an epoxy resin or a silicone resin can be used.
  • the surface of the non-magnetic layer 50 is flat.
  • the non-magnetic layer 50 preferably covers, for example, the winding portion 62 with a thickness of 0.1 mm or more and 3 mm or less.
  • the non-magnetic layer 50 preferably contains a filler such as silica powder or alumina powder, and preferably has a thermal conductivity of 1 W / m ⁇ K or more.
  • the non-magnetic layer 50 can transfer heat satisfactorily.
  • the non-magnetic layer 50 is formed by molding such as injection molding, transfer molding, sheet pressing, or the like.
  • the non-magnetic layer 50 is formed in a rectangular tubular shape.
  • the non-magnetic layer 50 has an upper surface 51 and a lower surface 52, and side surfaces 53, 54, 55, 56.
  • the side surfaces 53 and 54 of the non-magnetic layer 50 form the side surfaces 13 and 14 of the reactor 1.
  • the non-magnetic layer 50 has an inner peripheral surface 58 forming a through hole 57 penetrating the non-magnetic layer 50 from the upper surface 51 to the lower surface 52.
  • the winding portion 62 is exposed from the non-magnetic layer 50 on the side surface 54 of the non-magnetic layer 50. As shown in FIGS. 1 and 3, in the present embodiment, the winding portion 62 is covered with the non-magnetic layer 50 on the side surface 53 of the non-magnetic layer 50.
  • the magnetic core 40 is formed so as to cover a part of the non-magnetic layer 50 and the heat transfer member 30.
  • the magnetic core 40 is formed so as to cover the upper surface 31a of the base plate 31.
  • the magnetic core 40 is formed so as to expose the outer surfaces 34b and 35b of the heat radiating columns 34 and 35. Further, the magnetic core 40 is formed so as to expose the side surfaces 53 and 54 of the non-magnetic layer 50. Therefore, as shown in FIG. 2, the winding portion 62 is exposed from the side surface 54 of the non-magnetic layer 50 and the side surface 44 of the magnetic core 40.
  • At least one of the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 may be covered with a member other than the magnetic core 40, for example, a resin such as an adhesive. Further, at least one of the side surfaces 53 and 54 of the non-magnetic layer 50 may be covered with a member other than the magnetic core 40, for example, a resin such as an adhesive.
  • the magnetic core 40 has a rectangular parallelepiped outer shape.
  • the magnetic core 40 has an upper surface 41, a lower surface 42, and side surfaces 43, 44, 45, 46.
  • the upper surface 41 of the magnetic core 40 constitutes the upper surface 11 of the reactor 1.
  • the lower surface 42 of the magnetic core 40 is in contact with the upper surface 31a of the base plate 31 of the heat transfer member 30.
  • the side surfaces 43, 44, 45, 46 of the magnetic core 40 constitute the side surfaces 13, 14, 15, 16 of the reactor 1.
  • the magnetic core 40 has a fixing portion 47 protruding from the side surfaces 45 and 46.
  • the fixing portion 47 has the same shape as the fixing portion 33 of the base plate 31 when viewed from above.
  • the magnetic core 40 is formed of a mixture of magnetic powder and resin.
  • the magnetic powder include Fe-based amorphous powder, nanocrystal material, Fe, Fe-Si-Al-based, Fe-Si-based, Fe-Ni-based, Fe-Co-based soft magnetic metal material and ferrite material powder. , Etc. can be used.
  • the resin an epoxy resin, a silicone resin, or the like can be used.
  • the magnetic core 40 is formed by molding such as injection molding, transfer molding, sheet pressing, or the like.
  • the magnetic core 40 is formed by arranging the structure created up to the non-magnetic layer 50 in the mold and filling the mold with the above-mentioned material.
  • the reactor 1 has a winding portion 62 formed by winding a wire rod, and has a coil 60 arranged so that the winding portion 62 is parallel to the lower surface 12 and a non-covering portion 62. It has a magnetic layer 50, a magnetic core 40 that covers the non-magnetic layer 50, and a heat transfer member 30 that transfers heat inside toward the lower surface 12.
  • heat is generated at the winding portion 62 of the coil 60 by energizing the coil 60.
  • the heat inside the reactor 1 is transferred toward the lower surface 12 of the reactor 1 by the heat transfer member 30, and the heat is dissipated to the heat radiating member or the like to which the reactor 1 is attached. In this way, efficient heat dissipation from the coil 60 is possible.
  • the heat transfer member 30 has a base plate 31 and heat radiating columns 34 and 35 extending from the upper surface 31a of the base plate 31.
  • the upper surfaces 34c and 35c of the heat radiating columns 34 and 35 are in close contact with the non-magnetic layer 50 that covers the winding portion 62 of the coil 60. That is, the tips of the heat radiating columns 34 and 35 extending upward from the base plate 31 are in contact with the non-magnetic layer 50. Therefore, the heat generated in the winding portion 62 is transferred to the base plate 31 via the non-magnetic layer 50 and the heat radiating columns 34 and 35, and is radiated from the base plate 31 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
  • the outer surfaces 34b and 35b of the heat radiation columns 34 and 35 are exposed from the magnetic core 40. Therefore, the heat transferred by the heat radiating columns 34 and 35 is radiated from the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
  • the upper surfaces 34c and 35c of the heat radiating columns 34 and 35 of the heat transfer member 30 are in close contact with the non-magnetic layer 50.
  • the heat radiation columns 34 and 35 support the non-magnetic layer 50 at a predetermined distance from the base plate 31.
  • the magnetic core 40 is interposed between the base plate 31 and the non-magnetic layer 50. A magnetic path is formed by the magnetic core 40.
  • the reactor 1 has a winding portion 62 formed by winding a wire rod, and has a coil 60 arranged so that the winding portion 62 is parallel to the lower surface 12 and a winding portion. It has a non-magnetic layer 50 that covers 62, a magnetic core 40 that covers the non-magnetic layer 50, and a heat transfer member 30 that transfers heat inside toward the lower surface 12.
  • heat is generated at the winding portion 62 of the coil 60 by energizing the coil 60.
  • the heat inside the reactor 1 is transferred toward the lower surface 12 of the reactor 1 by the heat transfer member 30, and the heat is dissipated to the heat radiating member or the like to which the reactor 1 is attached. In this way, efficient heat dissipation from the coil 60 is possible.
  • the heat transfer member 30 has a base plate 31 and heat radiating columns 34 and 35 extending from the upper surface 31a of the base plate 31.
  • the upper surfaces 34c and 35c of the heat radiating columns 34 and 35 are in close contact with the non-magnetic layer 50 that covers the winding portion 62 of the coil 60. That is, the tips of the heat radiating columns 34 and 35 extending upward from the base plate 31 are in contact with the non-magnetic layer 50. Therefore, the heat generated in the winding portion 62 is transferred to the base plate 31 via the non-magnetic layer 50 and the heat radiating columns 34 and 35, and is radiated from the base plate 31 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
  • the configuration of the heat transfer member 30 is different from that of the first embodiment.
  • the heat transfer member 30 will be described, and the same reference numerals will be given to other constituent members, and some or all of the description will be omitted.
  • the heat transfer member 30 has a base plate 31 and a heat radiating column 36.
  • the heat transfer member 30 has one heat dissipation column 36.
  • the heat radiating column 36 is arranged inside the winding portion 62 of the coil 60 formed in an annular shape. As shown in FIG. 15, the heat radiating column 36 extends upward from the upper surface 31a of the base plate 31.
  • the heat radiation column 36 of this embodiment is integrated with the base plate 31.
  • the heat radiating column 36 extends above the non-magnetic layer 50.
  • the heat radiation column 36 of the present embodiment extends to the vicinity of the upper surface 41 of the magnetic core 40, that is, to the vicinity of the upper surface 11 of the reactor 2.
  • the heat of the central portion and the upper portion of the reactor 2 is transferred to the base plate 31 by the heat radiating column 36 extending to the vicinity of the upper surface 11 of the reactor 2, and the reactor 2 is transferred from the base plate 31 to the base plate 31. Can dissipate heat to the outside of.
  • the heat transfer member 30 has a base plate 31 and a heat radiation column 36 extending upward from the base plate 31 inside the winding portion 62 of the coil 60.
  • the heat radiating column 36 extending to the vicinity of the upper surface 11 of the reactor 2 transfers the heat of the central portion and the upper portion of the reactor 2 to the base plate 31, and can dissipate heat from the base plate 31 to the outside of the reactor 2. Therefore, the heat radiating column 36 constitutes a heat radiating path in which heat is directed to the lower surface 12 of the reactor 2 inside the winding portion 62 of the coil 60. As a result, the heat of the coil 60 can be efficiently dissipated.
  • the configurations of the non-magnetic layer 50 and the heat transfer member 37 are different from those of the first embodiment.
  • the non-magnetic layer 50 and the heat transfer member 37 will be described, and the same reference numerals will be given to other constituent members, and some or all of the description will be omitted.
  • the non-magnetic layer 50 of the present embodiment has a core dividing portion 59 that divides the magnetic core 40 inside the winding portion 62.
  • the core dividing portion 59 forms a magnetic gap 77 in the magnetic core 40. That is, the magnetic core 40 has a magnetic gap 77.
  • the magnetic gap 77 relaxes the magnetic saturation in the reactor 2 and improves the DC superimposition characteristic.
  • the non-magnetic layer 50 is formed by, for example, injection molding, transfer molding, sheet pressing, or other molding. Therefore, there is little variation in the thickness of the core dividing portion 59. Therefore, the thickness of the core dividing portion 59, that is, the magnetic gap 77 can be set accurately in the magnetic core 40.
  • the magnetic core 40 is formed by arranging the structure created up to the non-magnetic layer 50 in the mold and filling the mold with the above-mentioned material. Therefore, the magnetic gap 77 of the magnetic core 40 is easily formed by the core dividing portion 59 of the non-magnetic layer 50. Therefore, the reactor 3 can be easily formed without the need for the magnetic core 40 to be manufactured by dividing it or the steps of combining the divided cores.
  • the non-magnetic layer 50 of the present embodiment covers the winding portion 62 on the side surface 54. That is, the winding portion 62 is not exposed.
  • the winding portion 62 may be exposed on the side surface 54. Further, the winding portion 62 may be exposed on the side surface 53.
  • the heat transfer member 37 of this embodiment is a heat pipe and does not have a base plate. That is, the lower surface 12 of the reactor 3 is the lower surface 42 of the magnetic core 40.
  • the reactor 3 dissipates heat from the lower surface 42 of the magnetic core 40 to a member such as a heat radiating member to which the reactor 3 is attached.
  • the heat pipe transfers heat by the phase change of the working fluid.
  • the heat transfer member 37 includes a cylindrical main body 37a extending in the vertical direction of the reactor 3 and having an upper end and a lower end sealed therein, and a working fluid 37b (see FIG. 22) sealed inside the main body 37a. have.
  • the main body 37a is made of a substance having good thermal conductivity, for example, a metal such as copper.
  • As the working fluid 37b it is preferable to use a fluid having a high vapor pressure and a large latent heat of vaporization.
  • As the working fluid 37b for example, ammonia, water, chlorofluorocarbon, alcohol, acetone, or the like can be used.
  • the main body 37a moves the liquefied working fluid upward.
  • the heat transfer member 37 is arranged so as to penetrate the core dividing portion 59.
  • the heat transfer member 37 transfers heat from the upper part of the magnetic core 40 toward the lower surface 42 of the magnetic core 40.
  • the non-magnetic layer 50 has a core dividing portion 59 that divides the magnetic core 40 inside the winding portion 62.
  • the core dividing portion 59 forms a magnetic gap 77 in the magnetic core 40. That is, the magnetic core 40 has a magnetic gap 77.
  • the magnetic gap 77 can alleviate the magnetic saturation in the reactor 2 and improve the DC superimposition characteristic.
  • the heat transfer member 37 is a heat pipe.
  • the heat transfer member 37 extends in the vertical direction of the reactor 3.
  • the heat transfer member 37 can transfer the heat of the upper part of the magnetic core 40 toward the lower surface 12 of the reactor 3 (the lower surface 42 of the magnetic core 40).
  • the magnetic core 40 of the reactor 4 shown in FIGS. 25 to 27 covers substantially the entire non-magnetic layer 50.
  • the non-magnetic layer 50 has annular protective portions 53a and 53b protruding from the side surface 53 at a portion where the lead wires 21 and 22 extend, so that the magnetic core 40 does not come into contact with the lead wires 21 and 22. ..
  • the reactor 5 shown in FIG. 28 has a configuration in which the fixing portion 33 of the base plate 31 and the fixing portion 47 of the magnetic core 40 (see FIG. 1 and the like) are omitted.
  • the reactor may be fixed by a separate member.
  • the reactor 6 shown in FIGS. 29 and 30 is fixed to a member such as a heat radiating member by a fixing member 90.
  • the base plate 31 has a fixing portion 33, and the fixing member 90 fixes the base plate 31 to a member such as a heat radiating member together with the fixing portion 33.
  • the reactor having no fixed portion may be fixed to a member such as a heat radiating member by the fixing member 90.
  • the reactor 7 shown in FIGS. 31 and 32 includes annular protective portions 53a and 53b protruding from the side surface 53 in the non-magnetic layer 50 exposed from the side surface 43 of the magnetic core 40. .. In this reactor 7, the creepage distance from the magnetic core 40 to the lead wires 21 and 22 can be lengthened.
  • the base plate 31 and the heat radiating column 36 may be separate bodies from the second embodiment.
  • the heat radiating column 36 is fixed to the base plate 31 by a screw portion 36a formed at the lower end.
  • a method of fixing the heat radiation column 36 a method such as welding can also be used.
  • the material of the base plate 31 and the material of the heat radiating column 36 may be different from each other.
  • the heat radiating columns 34 and 35 are embedded in the magnetic core 40, that is, the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 are covered with the magnetic core 40. You may do so.
  • the shape of the coil may be appropriately changed with respect to the above embodiment.
  • a coil in which two winding portions 62 are connected in series may be used.

Abstract

The present disclosure provides a reactor that enables efficient heat dissipation from a coil. This reactor (1) comprises: a coil (60) which has a winding part (62) formed by winding a wire and which is disposed so as to have the winding part (62) situated parallel to an under surface (12); a non-magnetic layer (50) which covers the winding part (62); a magnetic core (40) which covers the non-magnetic layer (50); and a heat-transfer member (30) which transfers internal heat to the under surface (12).

Description

リアクトルReactor
　本開示は、リアクトルに関するものである。 This disclosure relates to reactors.
　従来、リアクトルは、鉄心と、鉄心に絶縁物を介して巻回されたコイルとを備える。また、リアクトルは、コイルとの間に介在された熱伝導材シートを有している（例えば、特許文献１参照）。 Conventionally, the reactor is provided with an iron core and a coil wound around the iron core via an insulator. Further, the reactor has a heat conductive material sheet interposed between the reactor and the coil (see, for example, Patent Document 1).
実開昭５１－１６２２３８号公報Jikkai Sho 51-162238
　ところで、上記のようなリアクトルは、熱伝導材シートによってコイルにて発生する熱を鉄心に放熱する。しかし、鉄心では、鉄心の損失による熱が生じるため、鉄心の温度が上昇し、コイルから放熱し難い。 By the way, the above reactor dissipates the heat generated by the coil by the heat conductive material sheet to the iron core. However, in the iron core, heat is generated due to the loss of the iron core, so that the temperature of the iron core rises and it is difficult to dissipate heat from the coil.
　本開示の目的は、コイルから効率良い放熱を可能としたリアクトルを提供することにある。 The purpose of the present disclosure is to provide a reactor that enables efficient heat dissipation from the coil.
　本開示の一態様であるリアクトルは、互いに反対側を向く上面及び下面を有し、前記下面を放熱部材の取付面に向けて取付けられるリアクトルであって、線材を巻回して形成された巻線部を有し、前記下面に対して前記巻線部を平行とするように配置されるコイルと、前記巻線部を被覆する非磁性層と、前記非磁性層を被覆する磁性体コアと、前記リアクトルの内部の熱を前記下面に向けて伝達する熱伝達部材と、を有する。 A reactor according to one aspect of the present disclosure is a reactor that has an upper surface and a lower surface facing opposite sides and is attached with the lower surface facing the mounting surface of a heat radiating member, and is a winding formed by winding a wire rod. A coil having a portion and arranged so that the winding portion is parallel to the lower surface, a non-magnetic layer covering the winding portion, and a magnetic core covering the non-magnetic layer. It has a heat transfer member that transfers heat inside the reactor toward the lower surface.
　この構成によれば、リアクトルの内部では、コイルに対する通電により、コイルの巻線部にて発熱する。リアクトルは、熱伝達部材により、リアクトルの内部の熱がリアクトルの下面に向けて伝達され、リアクトルが取着された放熱部材等に放熱される。このように、コイルから効率良い放熱が可能となる。 According to this configuration, inside the reactor, heat is generated at the winding part of the coil due to the energization of the coil. In the reactor, the heat inside the reactor is transferred toward the lower surface of the reactor by the heat transfer member, and the heat is dissipated to the heat radiating member or the like to which the reactor is attached. In this way, efficient heat dissipation from the coil is possible.
　本開示の一態様によれば、コイルから効率良い放熱を可能としたリアクトルを提供することができる。 According to one aspect of the present disclosure, it is possible to provide a reactor that enables efficient heat dissipation from the coil.
第１実施形態のリアクトルを示す上面側からの斜視図。The perspective view from the upper surface side which shows the reactor of 1st Embodiment. 第１実施形態のリアクトルを示す下面側からの斜視図。The perspective view from the lower surface side which shows the reactor of 1st Embodiment. 第１実施形態のリアクトルの正面図。Front view of the reactor of the first embodiment. 第１実施形態のリアクトルの側面図。A side view of the reactor of the first embodiment. 第１実施形態のリアクトルの平面図。Top view of the reactor of the first embodiment. 第１実施形態のリアクトルの断面図。Sectional drawing of the reactor of 1st Embodiment. 第１実施形態のリアクトルの断面図。Sectional drawing of the reactor of 1st Embodiment. 第１実施形態のリアクトルの断面図。Sectional drawing of the reactor of 1st Embodiment. 第２実施形態のリアクトルを示す上面側からの斜視図。The perspective view from the upper surface side which shows the reactor of the 2nd Embodiment. 第２実施形態のリアクトルを示す下面側からの斜視図。The perspective view from the lower surface side which shows the reactor of the 2nd Embodiment. 第２実施形態のリアクトルの正面図。Front view of the reactor of the second embodiment. 第２実施形態のリアクトルの側面図。A side view of the reactor of the second embodiment. 第２実施形態のリアクトルの平面図。Top view of the reactor of the second embodiment. 第２実施形態のリアクトルの断面図。Sectional drawing of the reactor of 2nd Embodiment. 第２実施形態のリアクトルの断面図。Sectional drawing of the reactor of 2nd Embodiment. 第２実施形態のリアクトルの断面図。Sectional drawing of the reactor of 2nd Embodiment. 第３実施形態のリアクトルを示す上面側からの斜視図。The perspective view from the upper surface side which shows the reactor of the 3rd Embodiment. 第３実施形態のリアクトルを示す下面側からの斜視図。The perspective view from the lower surface side which shows the reactor of the 3rd Embodiment. 第３実施形態のリアクトルの正面図。Front view of the reactor of the third embodiment. 第３実施形態のリアクトルの側面図。A side view of the reactor of the third embodiment. 第３実施形態のリアクトルの平面図。Top view of the reactor of the third embodiment. 第３実施形態のリアクトルの断面図。FIG. 3 is a cross-sectional view of the reactor of the third embodiment. 第３実施形態のリアクトルの断面図。FIG. 3 is a cross-sectional view of the reactor of the third embodiment. 第３実施形態のリアクトルの断面図。FIG. 3 is a cross-sectional view of the reactor of the third embodiment. 変更例のリアクトルを示す平面図。Top view showing the reactor of the modified example. 変更例のリアクトルを示す正面図。Front view showing the reactor of the modified example. 変更例のリアクトルを示す側面図。A side view showing a reactor of a modified example. 変更例のリアクトルを示す上面側からの斜視図。The perspective view from the upper surface side which shows the reactor of the modified example. 変更例のリアクトルを示す上面側からの斜視図。The perspective view from the upper surface side which shows the reactor of the modified example. 変更例のリアクトルの正面図。Front view of the modified reactor. 変更例のリアクトルの平面図。Top view of the modified reactor. 変更例のリアクトルの斜視図。A perspective view of the modified example reactor. 変更例のリアクトルを示す断面図。Sectional drawing which shows the reactor of the modification example. 変更例のリアクトルを示す断面図。Sectional drawing which shows the reactor of the modification example. 変更例のコイルを示す斜視図。The perspective view which shows the coil of the modification example.
　以下、各実施形態を説明する。 Hereinafter, each embodiment will be described.
　なお、添付図面は、理解を容易にするために構成要素を拡大して示している場合がある。構成要素の寸法比率は実際のものと、または別の図面中のものと異なる場合がある。また、断面図では、理解を容易にするために、一部の構成要素のハッチングを省略している場合がある。 Note that the attached drawings may show enlarged components for easier understanding. The dimensional ratios of the components may differ from the actual ones or those in another drawing. Further, in the cross-sectional view, hatching of some components may be omitted for easy understanding.
　（第１実施形態）
　以下、第１実施形態のリアクトル１を図１から図８にしたがって説明する。 (First Embodiment)
Hereinafter, the reactor 1 of the first embodiment will be described with reference to FIGS. 1 to 8.
　図１、図２に示すように、本実施形態のリアクトル１は、直方体状に形成され、互いに反対側を向く上面１１及び下面１２と、上面１１及び下面１２と交差し互いに反対側を向く側面１３，１４、上面１１及び下面１２及び側面１３，１４と交差し互いに反対側を向く側面１５，１６を有している。 As shown in FIGS. 1 and 2, the reactor 1 of the present embodiment is formed in a rectangular parallelepiped shape, and the upper surface 11 and the lower surface 12 facing the opposite sides and the side surfaces intersecting the upper surface 11 and the lower surface 12 and facing the opposite sides. It has side surfaces 15 and 16 that intersect 13 and 14, the upper surface 11 and the lower surface 12 and the side surfaces 13 and 14 and face opposite to each other.
　なお、本明細書において、「直方体状」には、角部や稜線部が面取りされた直方体や、角部や稜線部が丸められた直方体が含まれるものとする。また、主面及び側面の一部又は全部に凹凸などが形成されていてもよい。 In the present specification, the term "rectangular parallelepiped" includes a rectangular parallelepiped in which the corners and ridges are chamfered and a rectangular parallelepiped in which the corners and ridges are rounded. Further, unevenness or the like may be formed on a part or all of the main surface and the side surface.
　リアクトル１は、下面１２をこのリアクトル１を取付ける部材に向けて配置され、その部材に固定される。リアクトル１を取付ける部材は、例えばヒートシンク等の放熱部材である。リアクトル１は、側面１３から延出する２本のリード線２１，２２を有している。 The reactor 1 is arranged with the lower surface 12 facing the member to which the reactor 1 is attached, and is fixed to the member. The member to which the reactor 1 is attached is, for example, a heat radiating member such as a heat sink. The reactor 1 has two lead wires 21 and 22 extending from the side surface 13.
　図１から図８に示すように、リアクトル１は、熱伝達部材３０、磁性体コア４０、非磁性層５０、コイル６０を有している。 As shown in FIGS. 1 to 8, the reactor 1 has a heat transfer member 30, a magnetic core 40, a non-magnetic layer 50, and a coil 60.
　熱伝達部材３０は、磁性体コア４０よりも熱伝導率の高い材料、例えばアルミニウム（Ａｌ）、銅（Ｃｕ）、酸化アルミニウム（Ａｌ２Ｏ３）、窒化アルミニウム（ＡｌＮ）、等の熱伝導性のよい材料から構成される。 The heat transfer member 30 has higher thermal conductivity than the magnetic core 40, such as aluminum (Al), copper (Cu), aluminum oxide (Al 2 O 3 ), aluminum nitride (AlN), and the like. Composed of good materials.
　熱伝達部材３０は、ベース板３１と、放熱柱３４，３５とを有している。 The heat transfer member 30 has a base plate 31 and heat dissipation columns 34 and 35.
　ベース板３１は、四角形板状のベース部３２と、ベース部３２から延びる２つ固定部３３とを有している。 The base plate 31 has a quadrangular plate-shaped base portion 32 and two fixing portions 33 extending from the base portion 32.
　図３、図４に示すように、ベース板３１は、上面３１ａ及び下面３１ｂと、リード線２１，２２の延出方向を向く側面３１ｃと、側面３１ｃと反対側を向く側面３１ｄとを有している。ベース板３１の下面３１ｂは、リアクトル１の下面１２を構成する。 As shown in FIGS. 3 and 4, the base plate 31 has an upper surface 31a and a lower surface 31b, a side surface 31c facing the extending direction of the lead wires 21 and 22, and a side surface 31d facing the side opposite to the side surface 31c. ing. The lower surface 31b of the base plate 31 constitutes the lower surface 12 of the reactor 1.
　放熱柱３４，３５は、ベース板３１の上面３１ａから上方へ延びている。本実施形態において、各放熱柱３４，３５は、直方体状に形成されている。図４に示すように、放熱柱３４は、放熱柱３５の側を向く内側面３４ａと、この内側面３４ａと反対側を向く外側面３４ｂと、上面３４ｃとを有している。同様に、放熱柱３５は、放熱柱３４の側を向く内側面３５ａと、この内側面３５ａと反対側を向く外側面３５ｂと、上面３５ｃとを有している。本実施形態において、各放熱柱３４，３５は、ベース板３１と一体である。そして、図１、図４に示すように、放熱柱３４は、外側面３４ｂをベース板３１の側面３１ｃと面一とするように形成されている。図２、図４に示すように、放熱柱３５は、外側面３５ｂをベース板３１の側面３１ｄと面一とするように形成されている。 The heat radiation columns 34 and 35 extend upward from the upper surface 31a of the base plate 31. In the present embodiment, the heat radiating columns 34 and 35 are formed in a rectangular parallelepiped shape. As shown in FIG. 4, the heat radiating column 34 has an inner side surface 34a facing the side of the heat radiating column 35, an outer surface 34b facing the side opposite to the inner side surface 34a, and an upper surface 34c. Similarly, the heat radiating column 35 has an inner side surface 35a facing the side of the heat radiating column 34, an outer surface 35b facing the side opposite to the inner side surface 35a, and an upper surface 35c. In the present embodiment, the heat radiation columns 34 and 35 are integrated with the base plate 31. Then, as shown in FIGS. 1 and 4, the heat radiating column 34 is formed so that the outer surface 34b is flush with the side surface 31c of the base plate 31. As shown in FIGS. 2 and 4, the heat radiating column 35 is formed so that the outer surface 35b is flush with the side surface 31d of the base plate 31.
　図４、図７に示すように、放熱柱３４，３５の上面３４ｃ，３５ｃは、非磁性層５０に密着している。つまり、ベース板３１から上方に延びる放熱柱３４，３５の先端は、非磁性層５０に接している。非磁性層５０は、コイル６０を覆うように形成されている。 As shown in FIGS. 4 and 7, the upper surfaces 34c and 35c of the heat radiation columns 34 and 35 are in close contact with the non-magnetic layer 50. That is, the tips of the heat radiating columns 34 and 35 extending upward from the base plate 31 are in contact with the non-magnetic layer 50. The non-magnetic layer 50 is formed so as to cover the coil 60.
　ここで、コイル６０について説明する。コイル６０は、１本の線材を巻き回してなる螺旋状のコイルである。本実施形態の線材は、平角線である。平角線は、線材の長さ方向に直交する断面形状が長方形状の線材である。なお、本明細書において、「長方形状」には、角部が面取りされた長方形や、角部が丸められた長方形が含まれるものとする。また、「長方形状」には、辺の一部又は全部に凹凸が形成されているもの、一部又は全部の辺が全体的に湾曲しているものが含まれるものとする。なお、コイルを構成する線材として、断面形状が円形状や楕円形状や正方形状の線材が用いられてもよい。線材として、箔体状の導体が用いられてもよい。また、導体を積層してコイルを構成してもよい。 Here, the coil 60 will be described. The coil 60 is a spiral coil formed by winding one wire rod. The wire rod of the present embodiment is a flat wire. The flat wire is a wire rod having a rectangular cross-sectional shape orthogonal to the length direction of the wire rod. In the present specification, the "rectangle" includes a rectangle with chamfered corners and a rectangle with rounded corners. Further, the "rectangular shape" includes a shape in which unevenness is formed on a part or all of the sides, and a shape in which a part or all of the sides are curved as a whole. As the wire rod constituting the coil, a wire rod having a circular cross-sectional shape, an elliptical shape, or a square shape may be used. A foil-shaped conductor may be used as the wire rod. Further, conductors may be laminated to form a coil.
　コイル６０を構成する線材６１は、芯線６１ａと、芯線６１ａの表面を被覆する被覆材６１ｂとを含む。芯線６１ａは、Ｃｕ、Ａｌ、ＣｕやＡｌを主成分とする合金からなる。被覆材６１ｂは、絶縁材料、例えばポリイミドアミド等のエナメル材である。本実施形態のコイル６０は、線材として平角線を用い、その平角線をエッジワイズ巻きして形成されている。なお、平角線をフラットワイズ巻きしてコイル６０が形成されてもよい。 The wire rod 61 constituting the coil 60 includes a core wire 61a and a coating material 61b that covers the surface of the core wire 61a. The core wire 61a is made of Cu, Al, an alloy containing Cu or Al as a main component. The coating material 61b is an insulating material, for example, an enamel material such as polyimide amide. The coil 60 of the present embodiment is formed by using a flat wire as a wire rod and winding the flat wire edgewise. The coil 60 may be formed by flatwise winding a flat wire.
　コイル６０は、巻軸Ａｘを有する巻線部６２と、巻線部６２の第１端６２ａと第２端６２ｂとからそれぞれ延びる第１引出部６３と第２引出部６４を備えている。第１引出部６３と第２引出部６４は、図１に示すリード線２１，２２を構成する。図５に示すように、巻線部６２は、巻軸Ａｘの方向から視て、四角形の枠状に形成されている。巻線部６２の角部は、円弧状（１／４円）に形成されている。なお、巻線部６２の形状は、巻軸Ａｘの方向から視て、円形状、楕円形状や多角形状等の形状としてもよい。コイル６０は、巻線部６２の巻軸Ａｘをリアクトル１の下面１２に対して垂直とするように配置されている。 The coil 60 includes a winding portion 62 having a winding shaft Ax, and a first drawing portion 63 and a second drawing portion 64 extending from the first end 62a and the second end 62b of the winding portion 62, respectively. The first drawer portion 63 and the second drawer portion 64 form the lead wires 21 and 22 shown in FIG. As shown in FIG. 5, the winding portion 62 is formed in a quadrangular frame shape when viewed from the direction of the winding shaft Ax. The corners of the winding portion 62 are formed in an arc shape (1/4 circle). The shape of the winding portion 62 may be a circular shape, an elliptical shape, a polygonal shape, or the like when viewed from the direction of the winding shaft Ax. The coil 60 is arranged so that the winding shaft Ax of the winding portion 62 is perpendicular to the lower surface 12 of the reactor 1.
　非磁性層５０に戻って説明する。 Returning to the non-magnetic layer 50, the explanation will be given.
　非磁性層５０は、巻線部６２を覆うように形成されている。非磁性層５０の材料は、エポキシ樹脂、シリコーン樹脂、等の絶縁樹脂を用いることができる。非磁性層５０の表面は平坦である。非磁性層５０は、例えば巻線部６２を、０．１ｍｍ以上３ｍｍ以下の厚さで覆うことが好ましい。また、非磁性層５０は、シリカ粉やアルミナ粉等のフィラーを含むことが好ましく、また熱伝導率が１Ｗ／ｍ・Ｋ以上であることが好ましい。この非磁性層５０により、良好に熱を伝達できる。非磁性層５０は、例えば射出成形、トランスファー成形、シートプレス、等のモールド成形により形成される。 The non-magnetic layer 50 is formed so as to cover the winding portion 62. As the material of the non-magnetic layer 50, an insulating resin such as an epoxy resin or a silicone resin can be used. The surface of the non-magnetic layer 50 is flat. The non-magnetic layer 50 preferably covers, for example, the winding portion 62 with a thickness of 0.1 mm or more and 3 mm or less. Further, the non-magnetic layer 50 preferably contains a filler such as silica powder or alumina powder, and preferably has a thermal conductivity of 1 W / m · K or more. The non-magnetic layer 50 can transfer heat satisfactorily. The non-magnetic layer 50 is formed by molding such as injection molding, transfer molding, sheet pressing, or the like.
　図３及び図４に示すように、非磁性層５０は、四角形の筒状に形成されている。非磁性層５０は、上面５１及び下面５２、側面５３，５４，５５，５６を有している。非磁性層５０の側面５３，５４は、リアクトル１の側面１３，１４を構成する。そして、非磁性層５０は、上面５１から下面５２まで非磁性層５０を貫通する貫通孔５７を構成する内周面５８を有している。 As shown in FIGS. 3 and 4, the non-magnetic layer 50 is formed in a rectangular tubular shape. The non-magnetic layer 50 has an upper surface 51 and a lower surface 52, and side surfaces 53, 54, 55, 56. The side surfaces 53 and 54 of the non-magnetic layer 50 form the side surfaces 13 and 14 of the reactor 1. The non-magnetic layer 50 has an inner peripheral surface 58 forming a through hole 57 penetrating the non-magnetic layer 50 from the upper surface 51 to the lower surface 52.
　図２に示すように、巻線部６２は、非磁性層５０の側面５４において非磁性層５０から露出している。図１、図３に示すように、本実施形態において、巻線部６２は、非磁性層５０の側面５３において、非磁性層５０により覆われている。 As shown in FIG. 2, the winding portion 62 is exposed from the non-magnetic layer 50 on the side surface 54 of the non-magnetic layer 50. As shown in FIGS. 1 and 3, in the present embodiment, the winding portion 62 is covered with the non-magnetic layer 50 on the side surface 53 of the non-magnetic layer 50.
　磁性体コア４０は、非磁性層５０と熱伝達部材３０の一部を覆うように形成されている。 The magnetic core 40 is formed so as to cover a part of the non-magnetic layer 50 and the heat transfer member 30.
　図１、図２に示すように、磁性体コア４０は、ベース板３１の上面３１ａを覆うように形成されている。そして、磁性体コア４０は、放熱柱３４，３５の外側面３４ｂ，３５ｂを露出するように形成されている。また、磁性体コア４０は、非磁性層５０の側面５３，５４を露出するように形成されている。したがって、図２に示すように、巻線部６２は、非磁性層５０の側面５４、及び磁性体コア４０の側面４４から露出している。 As shown in FIGS. 1 and 2, the magnetic core 40 is formed so as to cover the upper surface 31a of the base plate 31. The magnetic core 40 is formed so as to expose the outer surfaces 34b and 35b of the heat radiating columns 34 and 35. Further, the magnetic core 40 is formed so as to expose the side surfaces 53 and 54 of the non-magnetic layer 50. Therefore, as shown in FIG. 2, the winding portion 62 is exposed from the side surface 54 of the non-magnetic layer 50 and the side surface 44 of the magnetic core 40.
　なお、放熱柱３４，３５の外側面３４ｂ，３５ｂの少なくとも一方は、磁性体コア４０以外の部材、例えば接着剤等の樹脂により覆われていてもよい。また、非磁性層５０の側面５３，５４の少なくとも一方は、磁性体コア４０以外の部材、例えば接着剤等の樹脂により覆われていてもよい。 At least one of the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 may be covered with a member other than the magnetic core 40, for example, a resin such as an adhesive. Further, at least one of the side surfaces 53 and 54 of the non-magnetic layer 50 may be covered with a member other than the magnetic core 40, for example, a resin such as an adhesive.
　磁性体コア４０は、直方体状の外形を有している。磁性体コア４０は、上面４１、下面４２、側面４３，４４，４５，４６を有している。磁性体コア４０の上面４１は、リアクトル１の上面１１を構成する。磁性体コア４０の下面４２は、熱伝達部材３０のベース板３１の上面３１ａに接している。磁性体コア４０の側面４３，４４，４５，４６は、リアクトル１の側面１３，１４，１５，１６を構成する。磁性体コア４０は、側面４５，４６から突出する固定部４７を有している。固定部４７は、上方から視て、ベース板３１の固定部３３と同じ形状である。 The magnetic core 40 has a rectangular parallelepiped outer shape. The magnetic core 40 has an upper surface 41, a lower surface 42, and side surfaces 43, 44, 45, 46. The upper surface 41 of the magnetic core 40 constitutes the upper surface 11 of the reactor 1. The lower surface 42 of the magnetic core 40 is in contact with the upper surface 31a of the base plate 31 of the heat transfer member 30. The side surfaces 43, 44, 45, 46 of the magnetic core 40 constitute the side surfaces 13, 14, 15, 16 of the reactor 1. The magnetic core 40 has a fixing portion 47 protruding from the side surfaces 45 and 46. The fixing portion 47 has the same shape as the fixing portion 33 of the base plate 31 when viewed from above.
　磁性体コア４０は、磁性粉末と樹脂との混合物により形成される。磁性粉末としては、例えばＦｅ系アモルファス粉末、ナノ結晶材料、Ｆｅ、Ｆｅ－Ｓｉ－Ａｌ系、Ｆｅ－Ｓｉ系、Ｆｅ－Ｎｉ系、Ｆｅ－Ｃｏ系などからなる軟磁性金属材料やフェライト材料の粉末、等を用いることができる。樹脂としては、エポキシ樹脂、シリコーン樹脂、等を用いることができる。磁性体コア４０は、例えば射出成形、トランスファー成形、シートプレス、等のモールド成形により形成される。磁性体コア４０は、非磁性層５０まで作成した構造体をモールド金型内に配置し、モールド金型内に充填した上記の材料により形成される。 The magnetic core 40 is formed of a mixture of magnetic powder and resin. Examples of the magnetic powder include Fe-based amorphous powder, nanocrystal material, Fe, Fe-Si-Al-based, Fe-Si-based, Fe-Ni-based, Fe-Co-based soft magnetic metal material and ferrite material powder. , Etc. can be used. As the resin, an epoxy resin, a silicone resin, or the like can be used. The magnetic core 40 is formed by molding such as injection molding, transfer molding, sheet pressing, or the like. The magnetic core 40 is formed by arranging the structure created up to the non-magnetic layer 50 in the mold and filling the mold with the above-mentioned material.
　（作用）
　リアクトル１は、線材を巻回して形成された巻線部６２を有し、下面１２に対して巻線部６２を平行とするように配置されるコイル６０と、巻線部６２を被覆する非磁性層５０と、非磁性層５０を被覆する磁性体コア４０と、内部の熱を下面１２に向けて伝達する熱伝達部材３０と、を有している。リアクトル１の内部では、コイル６０に対する通電により、コイル６０の巻線部６２にて発熱する。リアクトル１は、熱伝達部材３０により、リアクトル１の内部の熱がリアクトル１の下面１２に向けて伝達され、リアクトル１が取着された放熱部材等に放熱される。このように、コイル６０から効率良い放熱が可能となる。 (Action)
The reactor 1 has a winding portion 62 formed by winding a wire rod, and has a coil 60 arranged so that the winding portion 62 is parallel to the lower surface 12 and a non-covering portion 62. It has a magnetic layer 50, a magnetic core 40 that covers the non-magnetic layer 50, and a heat transfer member 30 that transfers heat inside toward the lower surface 12. Inside the reactor 1, heat is generated at the winding portion 62 of the coil 60 by energizing the coil 60. In the reactor 1, the heat inside the reactor 1 is transferred toward the lower surface 12 of the reactor 1 by the heat transfer member 30, and the heat is dissipated to the heat radiating member or the like to which the reactor 1 is attached. In this way, efficient heat dissipation from the coil 60 is possible.
　熱伝達部材３０は、ベース板３１と、ベース板３１の上面３１ａから延びる放熱柱３４，３５とを有している。放熱柱３４，３５の上面３４ｃ，３５ｃは、コイル６０の巻線部６２を覆う非磁性層５０に密着している。つまり、ベース板３１から上方に延びる放熱柱３４，３５の先端は、非磁性層５０に接している。したがって、巻線部６２にて発生する熱は、非磁性層５０と放熱柱３４，３５とを介してベース板３１に伝達され、そのベース板３１からリアクトル１の外部へと放熱される。従って、コイル６０から効率良い放熱が可能となる。 The heat transfer member 30 has a base plate 31 and heat radiating columns 34 and 35 extending from the upper surface 31a of the base plate 31. The upper surfaces 34c and 35c of the heat radiating columns 34 and 35 are in close contact with the non-magnetic layer 50 that covers the winding portion 62 of the coil 60. That is, the tips of the heat radiating columns 34 and 35 extending upward from the base plate 31 are in contact with the non-magnetic layer 50. Therefore, the heat generated in the winding portion 62 is transferred to the base plate 31 via the non-magnetic layer 50 and the heat radiating columns 34 and 35, and is radiated from the base plate 31 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
　放熱柱３４，３５の外側面３４ｂ，３５ｂは、磁性体コア４０から露出している。したがって、放熱柱３４，３５が伝達する熱は、放熱柱３４，３５の外側面３４ｂ，３５ｂからリアクトル１の外部へと放熱される。従って、コイル６０から効率良い放熱が可能となる。 The outer surfaces 34b and 35b of the heat radiation columns 34 and 35 are exposed from the magnetic core 40. Therefore, the heat transferred by the heat radiating columns 34 and 35 is radiated from the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
　図４、図７に示すように、熱伝達部材３０の放熱柱３４，３５の上面３４ｃ，３５ｃは、非磁性層５０に密着している。そして、放熱柱３４，３５は、ベース板３１から所定の距離にて非磁性層５０を支持している。これにより、図６に示すように、ベース板３１と非磁性層５０との間に磁性体コア４０が介在する。この磁性体コア４０により、磁路が形成される。 As shown in FIGS. 4 and 7, the upper surfaces 34c and 35c of the heat radiating columns 34 and 35 of the heat transfer member 30 are in close contact with the non-magnetic layer 50. The heat radiation columns 34 and 35 support the non-magnetic layer 50 at a predetermined distance from the base plate 31. As a result, as shown in FIG. 6, the magnetic core 40 is interposed between the base plate 31 and the non-magnetic layer 50. A magnetic path is formed by the magnetic core 40.
　以上記述したように、本実施形態によれば、以下の効果を奏する。 As described above, according to this embodiment, the following effects are obtained.
　（１－１）リアクトル１は、線材を巻回して形成された巻線部６２を有し、下面１２に対して巻線部６２を平行とするように配置されるコイル６０と、巻線部６２を被覆する非磁性層５０と、非磁性層５０を被覆する磁性体コア４０と、内部の熱を下面１２に向けて伝達する熱伝達部材３０と、を有している。リアクトル１の内部では、コイル６０に対する通電により、コイル６０の巻線部６２にて発熱する。リアクトル１は、熱伝達部材３０により、リアクトル１の内部の熱がリアクトル１の下面１２に向けて伝達され、リアクトル１が取着された放熱部材等に放熱される。このように、コイル６０から効率良い放熱が可能となる。 (1-1) The reactor 1 has a winding portion 62 formed by winding a wire rod, and has a coil 60 arranged so that the winding portion 62 is parallel to the lower surface 12 and a winding portion. It has a non-magnetic layer 50 that covers 62, a magnetic core 40 that covers the non-magnetic layer 50, and a heat transfer member 30 that transfers heat inside toward the lower surface 12. Inside the reactor 1, heat is generated at the winding portion 62 of the coil 60 by energizing the coil 60. In the reactor 1, the heat inside the reactor 1 is transferred toward the lower surface 12 of the reactor 1 by the heat transfer member 30, and the heat is dissipated to the heat radiating member or the like to which the reactor 1 is attached. In this way, efficient heat dissipation from the coil 60 is possible.
　（１－２）熱伝達部材３０は、ベース板３１と、ベース板３１の上面３１ａから延びる放熱柱３４，３５とを有している。放熱柱３４，３５の上面３４ｃ，３５ｃは、コイル６０の巻線部６２を覆う非磁性層５０に密着している。つまり、ベース板３１から上方に延びる放熱柱３４，３５の先端は、非磁性層５０に接している。したがって、巻線部６２にて発生する熱は、非磁性層５０と放熱柱３４，３５とを介してベース板３１に伝達され、そのベース板３１からリアクトル１の外部へと放熱される。従って、コイル６０から効率良い放熱が可能となる。 (1-2) The heat transfer member 30 has a base plate 31 and heat radiating columns 34 and 35 extending from the upper surface 31a of the base plate 31. The upper surfaces 34c and 35c of the heat radiating columns 34 and 35 are in close contact with the non-magnetic layer 50 that covers the winding portion 62 of the coil 60. That is, the tips of the heat radiating columns 34 and 35 extending upward from the base plate 31 are in contact with the non-magnetic layer 50. Therefore, the heat generated in the winding portion 62 is transferred to the base plate 31 via the non-magnetic layer 50 and the heat radiating columns 34 and 35, and is radiated from the base plate 31 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
　（１－３）放熱柱３４，３５の外側面３４ｂ，３５ｂは、磁性体コア４０から露出している。したがって、放熱柱３４，３５が伝達する熱は、放熱柱３４，３５の外側面３４ｂ，３５ｂからリアクトル１の外部へと放熱される。従って、コイル６０から効率良い放熱が可能となる。 (1-3) The outer surfaces 34b and 35b of the heat radiation columns 34 and 35 are exposed from the magnetic core 40. Therefore, the heat transferred by the heat radiating columns 34 and 35 is radiated from the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 to the outside of the reactor 1. Therefore, efficient heat dissipation from the coil 60 is possible.
　（第２実施形態）
　以下、第２実施形態のリアクトル２を図９から図１６にしたがって説明する。 (Second Embodiment)
Hereinafter, the reactor 2 of the second embodiment will be described with reference to FIGS. 9 to 16.
　なお、第２実施形態のリアクトル２において、熱伝達部材３０の構成が第１実施形態と異なる。本実施形態では、熱伝達部材３０について説明し、他の構成部材については同じ符号を付して説明の一部または全てを省略する。 In the reactor 2 of the second embodiment, the configuration of the heat transfer member 30 is different from that of the first embodiment. In the present embodiment, the heat transfer member 30 will be described, and the same reference numerals will be given to other constituent members, and some or all of the description will be omitted.
　図１１から図１６に示すように、熱伝達部材３０は、ベース板３１と、放熱柱３６とを有している。本実施形態において、熱伝達部材３０は、１つの放熱柱３６を有している。放熱柱３６は、環状に形成されたコイル６０の巻線部６２の内側に配設されている。図１５に示すように、放熱柱３６は、ベース板３１の上面３１ａから上方に延びている。本実施形態の放熱柱３６は、ベース板３１と一体である。そして、放熱柱３６は、非磁性層５０よりも上方に延びている。本実施形態の放熱柱３６は、磁性体コア４０の上面４１の付近、つまりリアクトル２の上面１１の付近まで延びている。 As shown in FIGS. 11 to 16, the heat transfer member 30 has a base plate 31 and a heat radiating column 36. In the present embodiment, the heat transfer member 30 has one heat dissipation column 36. The heat radiating column 36 is arranged inside the winding portion 62 of the coil 60 formed in an annular shape. As shown in FIG. 15, the heat radiating column 36 extends upward from the upper surface 31a of the base plate 31. The heat radiation column 36 of this embodiment is integrated with the base plate 31. The heat radiating column 36 extends above the non-magnetic layer 50. The heat radiation column 36 of the present embodiment extends to the vicinity of the upper surface 41 of the magnetic core 40, that is, to the vicinity of the upper surface 11 of the reactor 2.
　本実施形態の熱伝達部材３０では、リアクトル２の上面１１の付近まで延びている放熱柱３６により、リアクトル２の中央部分及び上部の熱をベース板３１に伝達し、そのベース板３１からリアクトル２の外部へと放熱できる。 In the heat transfer member 30 of the present embodiment, the heat of the central portion and the upper portion of the reactor 2 is transferred to the base plate 31 by the heat radiating column 36 extending to the vicinity of the upper surface 11 of the reactor 2, and the reactor 2 is transferred from the base plate 31 to the base plate 31. Can dissipate heat to the outside of.
　以上記述したように、本実施形態によれば、以下の効果を奏する。 As described above, according to this embodiment, the following effects are obtained.
　（２－１）熱伝達部材３０は、ベース板３１と、コイル６０の巻線部６２の内側において、ベース板３１から上方へ延びる放熱柱３６とを有している。リアクトル２の上面１１の付近まで延びている放熱柱３６により、リアクトル２の中央部分及び上部の熱をベース板３１に伝達し、そのベース板３１からリアクトル２の外部へと放熱できる。従って、放熱柱３６は、コイル６０の巻線部６２の内側において熱をリアクトル２の下面１２に向かう放熱経路を構成する。これにより、コイル６０の熱を効率よく放熱できる。 (2-1) The heat transfer member 30 has a base plate 31 and a heat radiation column 36 extending upward from the base plate 31 inside the winding portion 62 of the coil 60. The heat radiating column 36 extending to the vicinity of the upper surface 11 of the reactor 2 transfers the heat of the central portion and the upper portion of the reactor 2 to the base plate 31, and can dissipate heat from the base plate 31 to the outside of the reactor 2. Therefore, the heat radiating column 36 constitutes a heat radiating path in which heat is directed to the lower surface 12 of the reactor 2 inside the winding portion 62 of the coil 60. As a result, the heat of the coil 60 can be efficiently dissipated.
　（第３実施形態）
　以下、第３実施形態のリアクトル３を図１７から図２４にしたがって説明する。 (Third Embodiment)
Hereinafter, the reactor 3 of the third embodiment will be described with reference to FIGS. 17 to 24.
　なお、第３実施形態のリアクトル３において、非磁性層５０と熱伝達部材３７の構成が第１実施形態と異なる。本実施形態では、非磁性層５０と熱伝達部材３７について説明し、他の構成部材については同じ符号を付して説明の一部または全てを省略する。 In the reactor 3 of the third embodiment, the configurations of the non-magnetic layer 50 and the heat transfer member 37 are different from those of the first embodiment. In the present embodiment, the non-magnetic layer 50 and the heat transfer member 37 will be described, and the same reference numerals will be given to other constituent members, and some or all of the description will be omitted.
　図１９から図２４に示すように、本実施形態の非磁性層５０は、巻線部６２の内側において、磁性体コア４０を分割するコア分割部５９を有している。このコア分割部５９は、磁性体コア４０に磁気ギャップ７７を形成する。つまり、磁性体コア４０は磁気ギャップ７７を有している。磁気ギャップ７７は、リアクトル２における磁気飽和を緩和し、直流重畳特性を改善する。 As shown in FIGS. 19 to 24, the non-magnetic layer 50 of the present embodiment has a core dividing portion 59 that divides the magnetic core 40 inside the winding portion 62. The core dividing portion 59 forms a magnetic gap 77 in the magnetic core 40. That is, the magnetic core 40 has a magnetic gap 77. The magnetic gap 77 relaxes the magnetic saturation in the reactor 2 and improves the DC superimposition characteristic.
　非磁性層５０は、例えば射出成形、トランスファー成形、シートプレス、等のモールド成形により形成される。従って、コア分割部５９の厚さにばらつきが少ない。このため、コア分割部５９の厚さ、つまり磁性体コア４０において、磁気ギャップ７７を精度よく設定できる。磁性体コア４０は、非磁性層５０まで作成した構造体をモールド金型内に配置し、モールド金型内に充填した上記の材料により形成される。したがって、磁性体コア４０の磁気ギャップ７７は、非磁性層５０のコア分割部５９によって容易に形成される。このため、磁性体コア４０を分割して製造することや、分割したコアを合わせる工程等を必要とせず、リアクトル３を容易に形成できる。 The non-magnetic layer 50 is formed by, for example, injection molding, transfer molding, sheet pressing, or other molding. Therefore, there is little variation in the thickness of the core dividing portion 59. Therefore, the thickness of the core dividing portion 59, that is, the magnetic gap 77 can be set accurately in the magnetic core 40. The magnetic core 40 is formed by arranging the structure created up to the non-magnetic layer 50 in the mold and filling the mold with the above-mentioned material. Therefore, the magnetic gap 77 of the magnetic core 40 is easily formed by the core dividing portion 59 of the non-magnetic layer 50. Therefore, the reactor 3 can be easily formed without the need for the magnetic core 40 to be manufactured by dividing it or the steps of combining the divided cores.
　図２０に示すように、本実施形態の非磁性層５０は、側面５４において、巻線部６２を覆っている。つまり、巻線部６２は露出されていない。なお、側面５４において、巻線部６２を露出するようにしてもよい。また、側面５３において、巻線部６２を露出するようにしてもよい。 As shown in FIG. 20, the non-magnetic layer 50 of the present embodiment covers the winding portion 62 on the side surface 54. That is, the winding portion 62 is not exposed. The winding portion 62 may be exposed on the side surface 54. Further, the winding portion 62 may be exposed on the side surface 53.
　本実施形態の熱伝達部材３７は、ヒートパイプであり、ベース板を備えていない。つまり、リアクトル３の下面１２は、磁性体コア４０の下面４２である。リアクトル３は、磁性体コア４０の下面４２から、リアクトル３が取付けられる放熱部材等の部材へ放熱する。 The heat transfer member 37 of this embodiment is a heat pipe and does not have a base plate. That is, the lower surface 12 of the reactor 3 is the lower surface 42 of the magnetic core 40. The reactor 3 dissipates heat from the lower surface 42 of the magnetic core 40 to a member such as a heat radiating member to which the reactor 3 is attached.
　ヒートパイプは、作動流体の相変化により熱を伝達する。熱伝達部材３７は、リアクトル３の上下方向に延び、上端と下端とがそれぞれ封止された筒状の本体部３７ａと、本体部３７ａの内部に封入された作動流体３７ｂ（図２２参照）とを有している。本体部３７ａは、熱伝導性のよい物質、例えば銅等の金属により構成される。作動流体３７ｂは、蒸気圧が高く、蒸発潜熱が大きい流体を使用するのが好ましい。作動流体３７ｂとしては、例えば、アンモニア、水、フロン、アルコール、アセトン、等を用いることができる。本体部３７ａは、液化した作動流体を上方へと移動させる。 The heat pipe transfers heat by the phase change of the working fluid. The heat transfer member 37 includes a cylindrical main body 37a extending in the vertical direction of the reactor 3 and having an upper end and a lower end sealed therein, and a working fluid 37b (see FIG. 22) sealed inside the main body 37a. have. The main body 37a is made of a substance having good thermal conductivity, for example, a metal such as copper. As the working fluid 37b, it is preferable to use a fluid having a high vapor pressure and a large latent heat of vaporization. As the working fluid 37b, for example, ammonia, water, chlorofluorocarbon, alcohol, acetone, or the like can be used. The main body 37a moves the liquefied working fluid upward.
　本実施形態において、熱伝達部材３７は、コア分割部５９を貫通して配置されている。この熱伝達部材３７は、磁性体コア４０の上部の熱を、磁性体コア４０の下面４２に向けて伝達する。 In the present embodiment, the heat transfer member 37 is arranged so as to penetrate the core dividing portion 59. The heat transfer member 37 transfers heat from the upper part of the magnetic core 40 toward the lower surface 42 of the magnetic core 40.
　以上記述したように、本実施形態によれば、以下の効果を奏する。 As described above, according to this embodiment, the following effects are obtained.
　（３－１）非磁性層５０は、巻線部６２の内側において、磁性体コア４０を分割するコア分割部５９を有している。このコア分割部５９は、磁性体コア４０に磁気ギャップ７７を形成する。つまり、磁性体コア４０は磁気ギャップ７７を有している。磁気ギャップ７７は、リアクトル２における磁気飽和を緩和し、直流重畳特性を改善できる。 (3-1) The non-magnetic layer 50 has a core dividing portion 59 that divides the magnetic core 40 inside the winding portion 62. The core dividing portion 59 forms a magnetic gap 77 in the magnetic core 40. That is, the magnetic core 40 has a magnetic gap 77. The magnetic gap 77 can alleviate the magnetic saturation in the reactor 2 and improve the DC superimposition characteristic.
　（３－２）熱伝達部材３７は、ヒートパイプである。熱伝達部材３７は、リアクトル３の上下方向に延びている。この熱伝達部材３７により、磁性体コア４０の上部の熱を、リアクトル３の下面１２（磁性体コア４０の下面４２）に向けて伝達できる。 (3-2) The heat transfer member 37 is a heat pipe. The heat transfer member 37 extends in the vertical direction of the reactor 3. The heat transfer member 37 can transfer the heat of the upper part of the magnetic core 40 toward the lower surface 12 of the reactor 3 (the lower surface 42 of the magnetic core 40).
　（変更例）
　尚、上記各実施の形態は、以下の態様で実施してもよい。上記実施形態および以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 (Change example)
In addition, each of the above-mentioned embodiments may be carried out in the following embodiments. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
　・上記第１実施形態に対し、図２５から図２７に示すリアクトル４の磁性体コア４０は、非磁性層５０の略全体を覆っている。非磁性層５０は、リード線２１，２２が延出する部分において側面５３から突出する環状の保護部５３ａ，５３ｂを有し、磁性体コア４０がリード線２１，２２と接触しないようにしている。 -For the first embodiment, the magnetic core 40 of the reactor 4 shown in FIGS. 25 to 27 covers substantially the entire non-magnetic layer 50. The non-magnetic layer 50 has annular protective portions 53a and 53b protruding from the side surface 53 at a portion where the lead wires 21 and 22 extend, so that the magnetic core 40 does not come into contact with the lead wires 21 and 22. ..
　・上記各実施形態に対し、図２８に示すリアクトル５は、ベース板３１の固定部３３と磁性体コア４０の固定部４７（図１等参照）が省略された構成である。 -For each of the above embodiments, the reactor 5 shown in FIG. 28 has a configuration in which the fixing portion 33 of the base plate 31 and the fixing portion 47 of the magnetic core 40 (see FIG. 1 and the like) are omitted.
　・上記各実施形態に対し、別部材によりリアクトルが固定されてもよい。図２９、図３０に示すリアクトル６は、固定部材９０により、放熱部材等の部材に固定される。ベース板３１は、固定部３３を有しており、固定部材９０は、固定部３３とともにベース板３１を放熱部材等の部材に固定するものである。図２８に示すように、固定部を有していないリアクトルを固定部材９０により放熱部材等の部材に固定してもよい。 -For each of the above embodiments, the reactor may be fixed by a separate member. The reactor 6 shown in FIGS. 29 and 30 is fixed to a member such as a heat radiating member by a fixing member 90. The base plate 31 has a fixing portion 33, and the fixing member 90 fixes the base plate 31 to a member such as a heat radiating member together with the fixing portion 33. As shown in FIG. 28, the reactor having no fixed portion may be fixed to a member such as a heat radiating member by the fixing member 90.
　・上記第１実施形態に対し、図３１、図３２に示すリアクトル７は、磁性体コア４０の側面４３から露出する非磁性層５０において、側面５３から突出する環状の保護部５３ａ，５３ｂを備える。このリアクトル７では、磁性体コア４０からリード線２１，２２までの沿面距離を長くできる。 In contrast to the first embodiment, the reactor 7 shown in FIGS. 31 and 32 includes annular protective portions 53a and 53b protruding from the side surface 53 in the non-magnetic layer 50 exposed from the side surface 43 of the magnetic core 40. .. In this reactor 7, the creepage distance from the magnetic core 40 to the lead wires 21 and 22 can be lengthened.
　・上記第２実施形態に対し、図３３に示すように、ベース板３１と放熱柱３６とを別体としてもよい。図３３に示す例では、放熱柱３６は、下端に形成されたねじ部３６ａによってベース板３１に固定されている。なお、放熱柱３６の固定方法としては、溶接等の方法を用いることもできる。また、ベース板３１の材料と放熱柱３６の材料とを互いに異なるものとしてもよい。 -As shown in FIG. 33, the base plate 31 and the heat radiating column 36 may be separate bodies from the second embodiment. In the example shown in FIG. 33, the heat radiating column 36 is fixed to the base plate 31 by a screw portion 36a formed at the lower end. As a method of fixing the heat radiation column 36, a method such as welding can also be used. Further, the material of the base plate 31 and the material of the heat radiating column 36 may be different from each other.
　・上記第１実施形態に対し、図３４に示すように、放熱柱３４，３５が磁性体コア４０に埋設される、つまり放熱柱３４，３５の外側面３４ｂ，３５ｂを磁性体コア４０により覆うようにしてもよい。 -For the first embodiment, as shown in FIG. 34, the heat radiating columns 34 and 35 are embedded in the magnetic core 40, that is, the outer surfaces 34b and 35b of the heat radiating columns 34 and 35 are covered with the magnetic core 40. You may do so.
　・上記実施形態に対し、コイルの形状を適宜変更してもよい。例えば、図３５に示すように、２つの巻線部６２が直列に接続されたコイルを用いてもよい。 -The shape of the coil may be appropriately changed with respect to the above embodiment. For example, as shown in FIG. 35, a coil in which two winding portions 62 are connected in series may be used.
　１～７　リアクトル
　１１　上面
　１２　下面
　１３～１６　側面
　２１，２２　リード線
　３０　熱伝達部材
　３１　ベース板
　３１ａ　上面
　３１ｂ　下面
　３１ｃ，３１ｄ　側面
　３２　ベース部
　３３　固定部
　３４　放熱柱
　３４ａ　内側面
　３４ｂ　外側面
　３４ｃ　上面
　３５　放熱柱
　３５ａ　内側面
　３５ｂ　外側面
　３５ｃ　上面
　３６　放熱柱
　３６ａ　ねじ部
　３７　熱伝達部材
　３７ａ　本体部
　３７ｂ　作動流体
　４０　磁性体コア
　４１　上面
　４２　下面
　４３～４６　側面
　４７　固定部
　５０　非磁性層
　５１　上面
　５２　下面
　５３～５６　側面
　５３ａ　保護部
　５３ｂ　保護部
　５７　貫通孔
　５８　内周面
　５９　コア分割部
　６０　コイル
　６１　線材
　６１ａ　芯線
　６１ｂ　被覆材
　６２　巻線部
　６２ａ　第１端
　６２ｂ　第２端
　６３　第１引出部
　６４　第２引出部
　７７　磁気ギャップ
　９０　固定部材
　Ａｘ　巻軸 1 to 7 Reactor 11 Top surface 12 Bottom surface 13 to 16 Side surface 21, 22, Lead wire 30 Heat transfer member 31 Base plate 31a Top surface 31b Bottom surface 31c, 31d Side surface 32 Base part 33 Fixed part 34 Heat dissipation column 34a Inner side surface 34b Outer side surface 34c Top surface 35 Heat dissipation column 35a Inner side surface 35b Outer side surface 35c Upper surface 36 Heat dissipation column 36a Threaded part 37 Heat transfer member 37a Main body part 37b Working fluid 40 Magnetic material core 41 Upper surface 42 Lower surface 43 to 46 Side surface 47 Fixed part 50 Non-magnetic layer 51 Upper surface 52 Lower surface 53 ~ 56 Side surface 53a Protective part 53b Protective part 57 Through hole 58 Inner peripheral surface 59 Core split part 60 Coil 61 Wire rod 61a Core wire 61b Coating material 62 Winding part 62a 1st end 62b 2nd end 63 1st drawer part 64 2nd drawer Part 77 Magnetic gap 90 Fixing member Ax winding shaft

Claims (15)

  1. 　互いに反対側を向く上面及び下面を有し、前記下面を放熱部材の取付面に向けて取付けられるリアクトルであって、
    　線材を巻回して形成された巻線部を有し、前記下面に対して前記巻線部を平行とするように配置されるコイルと、
    　前記巻線部を被覆する非磁性層と、
    　前記非磁性層を被覆する磁性体コアと、
    　前記リアクトルの内部の熱を前記下面に向けて伝達する熱伝達部材と、
    　を有するリアクトル。     A reactor that has an upper surface and a lower surface facing opposite sides, and the lower surface is attached with the lower surface facing the mounting surface of the heat radiating member.
    A coil having a winding portion formed by winding a wire rod and arranged so that the winding portion is parallel to the lower surface.
    The non-magnetic layer that covers the winding part and
    A magnetic core that covers the non-magnetic layer and
    A heat transfer member that transfers heat inside the reactor toward the lower surface,
    Reactor with.
  2. 　前記熱伝達部材は、
    　前記下面を形成するベース板と、
    　前記ベース板から上方へ延び、先端が前記非磁性層に接する放熱柱と、
    を備える、請求項１に記載のリアクトル。     The heat transfer member is
    The base plate forming the lower surface and
    A heat-dissipating column extending upward from the base plate and having a tip in contact with the non-magnetic layer.
    The reactor according to claim 1.
  3. 　前記非磁性層は、前記巻線部の巻軸を中心とする筒状に形成され、
    　前記放熱柱は、前記巻軸に直交する方向に沿って前記巻軸を挟んで２つ設けられ、２つの前記放熱柱それぞれの前記先端が前記非磁性層に接する、
    　請求項２に記載のリアクトル。     The non-magnetic layer is formed in a cylindrical shape centered on the winding shaft of the winding portion.
    Two of the heat radiating columns are provided with the winding axis interposed therebetween in a direction orthogonal to the winding axis, and the tip of each of the two heat radiating columns is in contact with the non-magnetic layer.
    The reactor according to claim 2.
  4. 　前記非磁性層は、複数の側面を有し、
    　前記コイルは、前記巻線部の第１端から延びる第１引出部と、前記第１端と反対側の第２端から延びる第２引出部とを有し、
    　前記第１引出部及び前記第２引出部は、前記複数の側面のうちの１つの側面から延出しており、
    　前記磁性体コアは、前記第１引出部及び前記第２引出部が延出する前記側面を露出するように形成されている、
    　請求項２又は請求項３に記載のリアクトル。     The non-magnetic layer has a plurality of sides and has a plurality of sides.
    The coil has a first drawing portion extending from the first end of the winding portion and a second drawing portion extending from a second end opposite to the first end.
    The first drawer portion and the second drawer portion extend from one side surface of the plurality of side surfaces.
    The magnetic core is formed so as to expose the side surface on which the first drawer portion and the second drawer portion extend.
    The reactor according to claim 2 or 3.
  5. 　前記第１引出部及び前記第２引出部が延出する側面は、２つの前記放熱柱が配列されていない側面である、請求項４に記載のリアクトル。 The reactor according to claim 4, wherein the side surface on which the first drawer portion and the second drawer portion extend extends is a side surface on which the two heat radiation columns are not arranged.
  6. 　前記磁性体コアは、前記第１引出部及び前記第２引出部が延出する側面と反対側を向く側面を露出するように形成されている、請求項４又は請求項５に記載のリアクトル。 The reactor according to claim 4 or 5, wherein the magnetic core is formed so as to expose a side surface of the first drawer portion and the side surface facing the side opposite to the side surface on which the second drawer portion extends.
  7. 　前記放熱柱は、前記磁性体コアから露出している、請求項２から請求項６のいずれか一項に記載のリアクトル。 The reactor according to any one of claims 2 to 6, wherein the heat radiation column is exposed from the magnetic core.
  8. 　前記熱伝達部材は、
    　前記下面を形成するベース板と、
    　筒状の前記非磁性層の内側に配置され、前記ベース板から上方へ延びる放熱柱と、
    を備える、請求項１に記載のリアクトル。     The heat transfer member is
    The base plate forming the lower surface and
    A heat-dissipating column arranged inside the cylindrical non-magnetic layer and extending upward from the base plate,
    The reactor according to claim 1.
  9. 　前記非磁性層は、複数の側面を有し、
    　前記コイルは、前記巻線部の第１端から延びる第１引出部と、前記第１端に対して前記巻線部の反対側の第２端から延びる第２引出部とを有し、
    　前記第１引出部及び前記第２引出部は、前記複数の側面のうちの１つの側面から延出しており、
    　前記磁性体コアは、前記第１引出部及び前記第２引出部が延出する前記側面を露出するように形成されている、
    　請求項８に記載のリアクトル。     The non-magnetic layer has a plurality of sides and has a plurality of sides.
    The coil has a first extraction portion extending from the first end of the winding portion and a second extraction portion extending from the second end opposite to the first end of the winding portion.
    The first drawer portion and the second drawer portion extend from one side surface of the plurality of side surfaces.
    The magnetic core is formed so as to expose the side surface on which the first drawer portion and the second drawer portion extend.
    The reactor according to claim 8.
  10. 　前記磁性体コアは、前記第１引出部及び前記第２引出部が延出する側面と反対側を向く側面を露出するように形成されている、請求項９に記載のリアクトル。 The reactor according to claim 9, wherein the magnetic core is formed so as to expose a side surface of the first drawer portion and a side surface facing the side opposite to the side surface on which the second drawer portion extends.
  11. 　前記ベース板は、前記放熱部材に固定するための固定部を有している、請求項８から請求項１０の何れか一項に記載のリアクトル。 The reactor according to any one of claims 8 to 10, wherein the base plate has a fixing portion for fixing to the heat radiating member.
  12. 　前記熱伝達部材は、筒状の前記非磁性層の内側に配置され、前記巻線部の巻軸に沿って延びるヒートパイプを備える、請求項１に記載のリアクトル。 The reactor according to claim 1, wherein the heat transfer member is arranged inside the cylindrical non-magnetic layer and includes a heat pipe extending along a winding axis of the winding portion.
  13. 　前記線材は平角線であり、前記巻線部は、前記線材をエッジワイズ巻きして形成されてなる、請求項１から請求項１２のいずれか一項に記載のリアクトル。 The reactor according to any one of claims 1 to 12, wherein the wire rod is a flat wire, and the winding portion is formed by winding the wire rod edgewise.
  14. 　前記非磁性層は、前記磁性体コアを分割するコア分割部を有する、請求項１から請求項１３のいずれか一項に記載のリアクトル。 The reactor according to any one of claims 1 to 13, wherein the non-magnetic layer has a core dividing portion for dividing the magnetic core.
  15. 　前記非磁性層は、１Ｗ／ｍ・Ｋ以上の熱伝導率を有する、請求項１から請求項１４のいずれか一項に記載のリアクトル。 The reactor according to any one of claims 1 to 14, wherein the non-magnetic layer has a thermal conductivity of 1 W / m · K or more.
PCT/JP2021/008107 2020-04-28 2021-03-03 Reactor WO2021220606A1 (en)

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Citations (8)

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JPH0476015U (en) * 1990-11-14 1992-07-02
JP2001144478A (en) * 1999-11-18 2001-05-25 Tdk Corp Radiation structure of transformer
JP2008041882A (en) * 2006-08-04 2008-02-21 Daikin Ind Ltd Reactor
JP2012160616A (en) * 2011-02-01 2012-08-23 Denso Corp Transformer
US20150310976A1 (en) * 2014-04-25 2015-10-29 Delta Electronics (Shanghai) Co., Ltd. Magnetic element
JP2015230914A (en) * 2014-06-03 2015-12-21 日産自動車株式会社 Transformer
US20160336109A1 (en) * 2014-01-20 2016-11-17 Tritium Holdings Pty Ltd Transformer with improved heat dissipation
JP2019047105A (en) * 2017-03-27 2019-03-22 Tdk株式会社 Coil device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0476015U (en) * 1990-11-14 1992-07-02
JP2001144478A (en) * 1999-11-18 2001-05-25 Tdk Corp Radiation structure of transformer
JP2008041882A (en) * 2006-08-04 2008-02-21 Daikin Ind Ltd Reactor
JP2012160616A (en) * 2011-02-01 2012-08-23 Denso Corp Transformer
US20160336109A1 (en) * 2014-01-20 2016-11-17 Tritium Holdings Pty Ltd Transformer with improved heat dissipation
US20150310976A1 (en) * 2014-04-25 2015-10-29 Delta Electronics (Shanghai) Co., Ltd. Magnetic element
JP2015230914A (en) * 2014-06-03 2015-12-21 日産自動車株式会社 Transformer
JP2019047105A (en) * 2017-03-27 2019-03-22 Tdk株式会社 Coil device

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