WO2012176558A1 - Inductance et procédé pour sa fabrication - Google Patents

Inductance et procédé pour sa fabrication Download PDF

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Publication number
WO2012176558A1
WO2012176558A1 PCT/JP2012/062313 JP2012062313W WO2012176558A1 WO 2012176558 A1 WO2012176558 A1 WO 2012176558A1 JP 2012062313 W JP2012062313 W JP 2012062313W WO 2012176558 A1 WO2012176558 A1 WO 2012176558A1
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WO
WIPO (PCT)
Prior art keywords
reactor
core
adhesive
case
gap plate
Prior art date
Application number
PCT/JP2012/062313
Other languages
English (en)
Japanese (ja)
Inventor
康 野村
睦 伊藤
秀男 俵
鬼塚　孝浩
大石　明典
松谷　佳昭
Original Assignee
住友電気工業株式会社
住友電装株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 住友電気工業株式会社, 住友電装株式会社 filed Critical 住友電気工業株式会社
Publication of WO2012176558A1 publication Critical patent/WO2012176558A1/fr

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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
    • H01F27/24—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
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins

Definitions

  • the present invention relates to a reactor used for a component of a power conversion device such as an in-vehicle DC-DC converter mounted on a hybrid vehicle, and a manufacturing method thereof.
  • Patent Document 1 discloses a reactor used for a converter mounted on a vehicle such as a hybrid vehicle.
  • This reactor includes a combination formed by combining a coil member having a pair of coils connected in parallel and an annular magnetic core that is fitted into these coils so as to penetrate the inside of both coils.
  • the magnetic core constituting the reactor assembly is usually a combination of a plurality of core pieces and a gap plate interposed between the core pieces.
  • an epoxy resin adhesive or a urethane resin adhesive is used for bonding the core piece and the gap plate (see, for example, paragraph 0041 of Patent Document 1).
  • the present invention has been made in view of the above circumstances, and one of the objects of the present invention is to provide a reactor manufacturing method capable of manufacturing a reactor more easily than before, and a reactor obtained by the manufacturing method. It is to provide.
  • the inventors focused on the method of bonding the core piece and the gap plate.
  • a thermosetting material has been used in consideration of heat resistance. Therefore, in the manufacturing process of the reactor, a curing process for curing the thermosetting adhesive is required.
  • the curing process requires heating equipment such as a batch furnace, and also requires heating time. Therefore, the present inventors have studied using a room temperature curable adhesive for bonding the core piece and the gap plate, and have completed the present invention.
  • the manufacturing method of the reactor of this invention is a manufacturing method of the reactor which produces the reactor provided with the coil member which has a pair of coils connected in the parallel state, and the cyclic
  • a plurality of core pieces to be combined with each other and a gap plate interposed between the core pieces are prepared, and the core piece and the gap plate are bonded to each other at room temperature.
  • the magnetic core is produced by bonding with an agent.
  • the manufacturing method of the reactor of the present invention since a room temperature curable adhesive is used for bonding the core piece and the gap plate, it is necessary to perform a curing process as in the case of using a thermosetting adhesive. Disappear. Accordingly, the reactor manufacturing process can be simplified and the productivity of the reactor can be improved.
  • the reactor of the present invention is a reactor including a combination of a coil member having a pair of coils connected in parallel and an annular magnetic core penetrating the inside of both coils.
  • the magnetic core provided in the reactor of the present invention is formed by combining a plurality of core pieces and a gap plate interposed between the core pieces, and a room temperature curable adhesive is bonded between the core piece and the gap plate.
  • An adhesive layer made of an agent is provided.
  • the reactor of the present invention is a reactor manufactured with higher productivity than before. It uses a room-temperature curable adhesive instead of a thermosetting adhesive for the production of the magnetic core provided in the reactor. Because.
  • the reactor of the present invention can be configured to include a case that houses the assembly.
  • the case is formed on the side wall portion surrounding the assembly, the bottom plate portion which is a member different from the side wall portion, and the case inner surface side of the bottom plate portion, and the heat dissipation interposed between the bottom plate portion and the coil. And a layer.
  • this invention reactor does not make a case essential, it can protect a combination from the physical impact from the outside by setting it as a structure provided with a case, and can also improve the heat dissipation of a combination. . Particularly, by arranging the side wall portion and the bottom plate portion separately, it is easy to arrange the assembly (including alignment) in the case. Moreover, the heat dissipation of a reactor can be improved by interposing a thermal radiation layer between a baseplate part and a coil.
  • reactor provided with the case which has the said side wall part, a baseplate part, and a thermal radiation layer, it is provided with the contact bonding layer which consists of a normal temperature curable adhesive between a baseplate part and the magnetic core exposed from a coil. Is preferred.
  • the case and the combined body can be integrated by fixing the combined body to the case.
  • a normal temperature curable adhesive is used for the integration, it is not necessary to perform a curing process unlike a thermosetting adhesive.
  • the Shore hardness of the adhesive layer is preferably D70 to D100.
  • the Shore hardness of the adhesive layer made of the cured room temperature curable adhesive is within the above range, it becomes like a rigid body in which the core piece and the gap plate joined by this adhesive are almost integrated. That is, the whole magnetic core formed by combining the core piece and the gap can be made into one rigid body. Further, in the reactor including the case, if the Shore hardness of the adhesive layer between the case and the combined body is within the above range, the entire reactor including the case can be made into one rigid body. Thus, if a reactor including a magnetic core and a case becomes one rigid body, the vibration of the reactor accompanying use of a reactor can be suppressed.
  • the glass transition point of the adhesive layer is preferably 70 ° C. to 180 ° C.
  • the glass transition point of the cured adhesive layer composed of a normal temperature curable adhesive is within the above range, the adhesive layer will not be softened at the use temperature of the reactor. Therefore, the rigidity of the entire magnetic core formed by combining the core piece and the gap plate can be maintained while the reactor is used. As a result, it is possible to suppress the vibration of the reactor accompanying the use of the reactor. If an adhesive layer having a glass transition point in the above range is also used for adhesion between the case and the assembly, the rigidity of the entire reactor including the case can be maintained.
  • a room temperature curable instantaneous adhesive is applied to the core piece, and a primer (an undercoat which improves the adhesive strength of the adhesive) is applied to the gap plate.
  • a primer an undercoat which improves the adhesive strength of the adhesive
  • the adhesive can be prevented from curing before the core piece and the gap plate are stacked. Further, by applying the instantaneous adhesive on the core piece side and the primer on the gap plate side, it is possible to prevent the adhesive from directly touching the gap plate and eroding the gap plate.
  • FIG. 1 is an exploded perspective view showing an outline of a reactor described in Embodiment 1.
  • FIG. It is a disassembled perspective view which shows the outline of the combination body of the reactor shown in FIG.
  • a reactor 1 shown in FIG. 1 includes a combined body 10 formed by combining a coil member 2 and a magnetic core 3, and a case 4 that houses the combined body 10.
  • the case 4 is a box that is open on one side, and the combined body 10 arranged in the case 4 is embedded in a sealing resin (not shown) except for the end of the winding 2 w that forms the coil member 2. Is done.
  • the most characteristic feature of the reactor 1 is that the magnetic core 3 is formed by combining a plurality of core pieces (outer core portions 33 and 34, split cores 31m) and a gap plate 31g as shown in FIG. This is because the room temperature curable adhesive is used for joining the core pieces 33, 34, 31m and the gap plate 31g.
  • each structure of the reactor 1 is demonstrated in detail, and the manufacturing method of the said reactor 1 is demonstrated then.
  • the coil member 2 constituting the combined body 10 will be described with reference to FIGS.
  • the coil member 2 includes a pair of coils 2a and 2b and a coil connecting portion 2r that connects both the coils 2a and 2b.
  • the coils 2a and 2b are formed in a hollow rectangular tube shape with the same number of turns and the same winding direction, and are arranged side by side so that the axial directions are parallel to each other.
  • the connecting portion 2r is a portion bent in a U shape that connects the coils 2a and 2b on the other end side of the coil member 2 (the right side in FIG. 1 and FIG. 2).
  • the coil member 2 in this embodiment is composed of a single winding 2w provided with an insulating coating (typically polyimide amide) on the outer periphery of a flat conductor such as copper or aluminum, and the portions of the coils 2a and 2b are windings. It is formed in a rectangular tube shape by winding 2w spirally edgewise.
  • the cross section of the winding 2w is not limited to a rectangular shape, and may be a circular shape, an elliptical shape, a polygonal shape, or the like, and the winding shape may be an elliptical cylindrical shape.
  • the coil members may be manufactured by manufacturing the coils 2a and 2b with separate windings and joining the ends of the windings forming the coils 2a and 2b by welding or the like.
  • Both ends of the winding 2w forming the coil member 2 are appropriately extended from the turn forming portion on one end side of the coil member 2 (on the left side in FIG. 1 and FIG. 2) and pulled out of the case 4.
  • the insulating coating is peeled off at both ends of the drawn winding 2w, and a conductive terminal fitting (not shown) is connected to the conductor portion exposed from the insulating coating.
  • An external device such as a power source for supplying power is connected to the coil member 2 through the terminal fitting.
  • the magnetic core 3 has a pair of inner core portions 31 and 32 disposed inside the coils 2 a and 2 b and a pair of outer core portions 33 and 34 exposed from the coil member 2.
  • Each inner core part 31 and 32 is a rectangular parallelepiped shape
  • each outer core part 33 and 34 is a columnar body which has a dome-shaped surface, for example.
  • One end (the left side of the drawing) of the inner core portions 31 and 32 that are spaced apart is connected via one outer core portion 33, and the other end (the right side of the drawing) of the core portions 31 and 32 is the other outside. It is connected via the core part 34.
  • the annular magnetic core 3 is formed by the inner core portions 31 and 32 and the outer core portions 33 and 34.
  • the inner core portion 31 (32) is a laminate formed by alternately laminating divided cores (core pieces) 31m made of a substantially rectangular parallelepiped magnetic material and gap plates 31g having a lower magnetic permeability than the divided core 31m.
  • the outer core portions 33 and 34 are columnar core pieces having a dome-shaped bottom surface and top surface. As each core piece, a molded body using magnetic powder or a laminated body in which a plurality of magnetic thin plates (for example, electromagnetic steel sheets) having an insulating coating are laminated can be used.
  • the split core 31m constituting the inner core portions 31 and 32 and the outer core portions 33 and 34 may have different magnetic characteristics by using different magnetic materials.
  • the molded body constituting the core piece is, for example, an iron group metal such as Fe, Co, or Ni, or an Fe group such as Fe—Si, Fe—Ni, Fe—Al, Fe—Co, Fe—Cr, or Fe—Si—Al.
  • a ferrite core which is a sintered body of a metal oxide can be mentioned.
  • the molded body can easily form magnetic cores having various three-dimensional shapes.
  • the gap plate 31g may be made of a nonmagnetic material such as alumina, glass epoxy resin, or unsaturated polyester, or a soft magnetic material may be dispersed in these nonmagnetic materials. In any case, the gap plate 31g has a lower magnetic permeability than the core piece.
  • a room temperature curable adhesive is used for bonding the core pieces 31m, 33, 34 and the gap plate 31g.
  • the cured room temperature curable adhesive remains as an adhesive layer 7 between the core pieces 31m, 33, 34 and the gap plate 31g.
  • FIG. 2 in the exploded view of the inner core portion 31, one of the plurality of adhesive layers 7 is illustrated by cross-hatching. Is formed.
  • the room temperature curable adhesive used preferably uses an adhesive having a Shore hardness of D70 to D100 when the adhesive layer 7 is cured to become the adhesive layer 7. It is also preferable to use a room temperature curable adhesive in which the glass transition point of the adhesive layer 7 is in the range of 70 ° C. to 180 ° C.
  • the room temperature curable adhesive satisfying such properties include acrylic acid esters which are acrylic polymers, silyl group-containing special polymers, and the like.
  • the combined body 10 of the present embodiment includes a bobbin 5 for enhancing insulation between the coil member 2 and the magnetic core 3.
  • a bobbin constituent material an insulating material such as polyphenylene sulfide (PPS) resin, polytetrafluoroethylene (PTFE) resin, or liquid crystal polymer (LCP) can be used.
  • PPS polyphenylene sulfide
  • PTFE polytetrafluoroethylene
  • LCP liquid crystal polymer
  • the bobbin 5 is a pair of frame-shaped bobbins that are in contact with the inner bobbin 51 (52) disposed on the outer periphery of the inner core portion 31 (32) and the end surface of the coil member 2 (the surface where the coil turns appear to be annular).
  • the structure provided with 53 and 54 is mentioned.
  • the inner bobbin 51 is composed of a pair of bobbin pieces 51a and 51b made of an insulating material having a cross section] (the inner bobbin 52 has the same configuration).
  • the bobbin piece 51a (51b) is configured to cover the entire upper surface (the entire lower surface) of the inner core portion 31, and part of the left and right surfaces. Therefore, both the bobbin pieces 51a and 51b attached to the inner core portion 31 are not in contact with each other.
  • the material of the inner side bobbin 51 (52) can be reduced, and the contact area of the inner core part 31 (32) and sealing resin can be enlarged.
  • the inner bobbin 51 may be a cylindrical body that is disposed along the entire circumference of the outer peripheral surface of the inner core portion 31 when attached to the inner core portion 31.
  • the frame bobbins 53 and 54 are flat and have a pair of openings through which the respective inner core portions 31 and 32 are inserted, so that the inner core portions 31 and 32 can be easily introduced.
  • a short cylindrical portion projecting on the side of 31 and 32 is provided.
  • the frame-shaped bobbin 54 is provided with a flange portion 54f on which the coil connecting portion 2r is placed and insulates between the coil connecting portion 2r and the outer core portion 32.
  • the case 4 will be described with reference to FIG.
  • the case 4 in which the assembly 10 is accommodated includes a flat bottom plate portion 40 and a frame-like side wall portion 41 standing on the bottom plate portion 40, and the bottom plate portion 40 and the side wall portion 41 are configured as separate members. Has been.
  • the bottom plate portion 40 is a rectangular plate member that is fixed to the fixed object when the reactor 1 is installed on the fixed object such as a cooling base.
  • the bottom plate portion 40 is formed with a heat radiation layer 42 on one surface arranged on the inner side.
  • the bottom plate portion 40 has flange portions 400 protruding from the four corners, and bolt portions (not shown) for fixing the case 4 to the fixing object are inserted into the flange portions 400, respectively.
  • 400h is provided.
  • the bolt hole 400h is provided so as to be continuous with a bolt hole 411h of the side wall 41 described later. As the bolt holes 400h and 411h, any of through holes that are not threaded and screw holes that are threaded can be used, and the number and the like can be appropriately selected.
  • the bottom plate portion 40 includes a heat radiation layer 42 at a location where the coil installation surface of the coil member 2 contacts.
  • the heat dissipation layer 42 may be formed over a portion corresponding to the core installation surface of the outer core portions 33 and 34.
  • the heat radiation layer 42 is preferably made of an insulating material having a thermal conductivity of more than 2 W / m ⁇ K.
  • the heat conductivity of the heat radiation layer 42 is preferably as high as possible, and is made of an insulating material of 3 W / m ⁇ K or more, especially 10 W / m ⁇ K, more preferably 20 W / m ⁇ K, especially 30 W / m ⁇ K or more. Is preferred.
  • Examples of the constituent material of the heat dissipation layer 42 satisfying such thermal characteristics include non-metallic inorganic materials such as ceramics such as a metal element or a kind of material selected from Si oxides, carbides, and nitrides.
  • Examples of the ceramic include silicon nitride (Si 3 N 4 ), alumina (Al 2 O 3 ), aluminum nitride (AlN), boron nitride (BN), and silicon carbide (SiC).
  • the heat dissipation layer 42 is formed from the ceramics, for example, a vapor deposition method such as a PVD method or a CVD method can be used.
  • the heat dissipation layer 42 may be formed by bonding the ceramic sintered plate to the bottom plate portion 40 with an appropriate adhesive.
  • the heat radiation layer 42 may be made of an insulating resin (for example, an epoxy resin or an acrylic resin) containing a filler made of the ceramics. If the insulating resin containing filler is used, the heat dissipation layer 42 having excellent heat dissipation and electrical insulation can be formed.
  • Such a heat dissipation layer 42 can be formed by applying an insulating resin containing a filler to the bottom plate portion 40 or screen printing.
  • the heat dissipation layer 42 is an adhesive, the adhesion between the coil 2 and the heat dissipation layer 42 can be improved.
  • the heat radiating layer 42 and the outer core part 33 are formed by the room temperature curable adhesive used for bonding the core pieces 31m, 33 and 34 and the gap plate 31g. , 34 are preferably bonded together.
  • an adhesive layer made of a room temperature curable adhesive is also formed between the heat dissipation layer 42 and the outer core portions 33, 34, and the entire reactor 1 including the case 4 can be integrated.
  • the side wall 41 is a cylindrical frame, and when the case 4 is assembled by closing one opening with the bottom plate 40, the side wall 41 is disposed so as to surround the assembly 10 and the other opening is open. Is done.
  • region used as the installation side when the reactor 1 is installed in fixation object is a rectangular shape along the external shape of the said baseplate part 40, and the area
  • the side wall 41 may be provided with a terminal block (not shown) that can fix the terminal fitting.
  • a terminal block (not shown) that can fix the terminal fitting.
  • the installation side region of the side wall portion 41 is formed with attachment locations including flange portions 411 protruding from the four corners, and each flange portion 411 is provided with a bolt hole 411h.
  • the bolt hole 411h may be formed only from the constituent material of the side wall 41.
  • a metal cylinder may be insert-molded at the position of the flange portion 411, and the metal cylinder may be used as the bolt hole 411h. In that case, creep deformation of the flange portion 411 can be suppressed.
  • an appropriate adhesive may be used as a method for connecting the bottom plate portion 40 and the side wall portion 41 other than the bolt.
  • an adhesive When an adhesive is used, a convex portion is formed on one of the bottom plate portion 40 and the side wall portion 41, and a concave portion that fits the convex portion is formed on the other side, and the position of the side wall portion 41 with respect to the bottom plate portion 40 is determined. It is preferable to be determined uniquely. In this case, it is preferable to fix the reactor 1 to the fixing target by bolting the bottom plate part 40 to the fixing target without forming the bolt hole 411h in the side wall 41.
  • the bottom plate portion 40 is made of a metal material and the side wall portion 41 is made of a resin material as will be described later, creep deformation of the resin material due to bolting can be suppressed, and the fixed state of the reactor 1 with respect to the fixing object is loosened. This can be suppressed.
  • the constituent material of the case 4 can be a metal material, for example. Since the metal material generally has excellent thermal conductivity, the case 4 having excellent heat dissipation can be produced. Specific metal materials that can be used include, for example, aluminum, magnesium, copper, silver, alloys thereof, and stainless steel. In particular, if aluminum or an alloy thereof is used, the case 4 that is lightweight and excellent in corrosion resistance can be produced. When the case 4 is formed of a metal material, it can be formed by plastic working such as press working in addition to casting such as die casting.
  • a non-metallic material such as polybutylene terephthalate (PBT) resin, urethane resin, polyphenylene sulfide (PPS) resin, acrylonitrile-butadiene-styrene (ABS) resin can be used. Since many of these resin materials are excellent in electrical insulation, the insulation between the assembly 10 and the case 4 can be enhanced. When the resin material is mixed with a filler made of ceramics (see a sealing resin filler described later), the heat dissipation can be improved. When forming case 4 with resin, injection molding can be used suitably.
  • PBT polybutylene terephthalate
  • PPS polyphenylene sulfide
  • ABS acrylonitrile-butadiene-styrene
  • the constituent material of the bottom plate portion 40 and the constituent material of the side wall portion 41 constituting the case 4 can be appropriately selected.
  • the bottom plate portion 40 and the side wall portion 41 may be made of the same kind of constituent material or different kinds of constituent materials.
  • the bottom plate portion 40 is preferably made of a metal material such as aluminum and the side wall portion 41 is made of a resin material such as PBT resin.
  • the case 4 is filled with a sealing resin made of an insulating resin. At that time, the end of the winding 2 w is pulled out of the case 4 and exposed from the sealing resin.
  • the sealing resin include an epoxy resin, a urethane resin, and a silicone resin.
  • This sealing resin contains a filler excellent in insulation and thermal conductivity, for example, a filler made of at least one ceramic selected from silicon nitride, alumina, aluminum nitride, boron nitride, mullite, and silicon carbide. It is preferable to improve the heat dissipation of the sealing resin.
  • the packing 6 in the present embodiment is an annular body having a size that can be engaged with the outer periphery of the combined body 10 of the coil member 2 and the magnetic core 3, and is made of synthetic rubber. Any suitable material can be used.
  • the reactor 1 described above can be used in power conversion devices such as electric vehicles and hybrid vehicles.
  • the energization conditions of the reactor for such use are maximum current (DC): about 100 A to 1000 A, average voltage: about 100 V to 1000 V, and operating frequency: about 5 kHz to 100 kHz.
  • the reactor 1 provided with the said structure can be manufactured as follows.
  • the combined body 10 is formed by combining the coil member 2 and the magnetic core 3.
  • the inner core portion 31 (32) is formed by bonding the split core 31m and the gap plate 31g with a room temperature curable instantaneous adhesive.
  • the instantaneous adhesive for example, ThreeBond 1757 of Three Bond Co., Ltd., LOCTITE I 4212 of Henkel Japan Co., Ltd., or the like can be used.
  • the inner core part 31 (32) is inserted into each coil 2a (2b) in a state where the inner bobbin 51 (52) is disposed on the outer periphery of the produced inner core part 31 (32). And while arrange
  • the outer core part 34 is arrange
  • the end surface of the inner core portion 31 (32) is exposed from the opening of the frame-shaped bobbin 53 (54) and contacts the inner end surface of the outer core portion 33 (34).
  • the instant adhesive and primer may be used for bonding the inner core portion 31 (32) and the outer core portion 33 (34). In that case, it is preferable to apply an instantaneous adhesive to the outer core portion 33 (34) and apply a primer to the gap plate 31g exposed on the end face of the inner core portion 31 (32).
  • an aluminum plate is punched into a predetermined shape to form a bottom plate portion 40, and a heat radiation layer 42 that also serves as an adhesive of a predetermined shape is formed on one surface by screen printing. Then, the combined body 10 assembled as described above is placed on the heat radiation layer 42, thereby fixing the combined body 10 to the bottom plate portion 40.
  • a room temperature curable instantaneous adhesive is applied to the core installation surfaces of the outer core portions 33 and 34, and a primer is applied to a portion of the heat dissipation layer 42 that contacts the core installation surface.
  • the side wall 41 configured in a predetermined shape by injection molding or the like is covered from above the combined body 10 so as to surround the outer periphery of the combined body 10.
  • the packing 6 is disposed along the outer edge portion of the bottom plate portion 40.
  • the baseplate part 40 and the side wall part 41 are integrated by the bolt (not shown) prepared separately.
  • the reactor 1 is completed by filling the case 4 with the sealing resin and curing the sealing resin.
  • the reactor 1 provided with the structure demonstrated above can be produced easily and in a short time. This is because, when the magnetic core 3 is assembled, a room temperature curable adhesive is used to join the core pieces 31m, 33, 34 and the gap plate 31g. If a room temperature curable adhesive is used, the curing process required in the case of joining the core pieces 31m, 33, 34 and the gap plate 31g using thermosetting adhesion can be omitted, and the curing process is performed. Therefore, the manufacturing process of the reactor 1 can be shortened.
  • the reactor of the present invention can be suitably used for components of power conversion devices such as in-vehicle converters such as hybrid vehicles, electric vehicles, and fuel cell vehicles.
  • Reactor 2 Coil members 2a, 2b: Coil 2r: Coil connecting portion 2w: Winding 3: Magnetic core 31, 32: Inner core portion 31m: Divided core (core piece) 31g: Gap plate 33, 34: Outer core Part (core piece) 4: Case 40: Bottom plate part 400: Flange part 400h: Heat release layer 41: Side wall part 411: Flange part 411h: Bolt hole 5: Bobbin 51, 52: Inner bobbin 51a, 51b: Bobbin piece 53, 54: Frame 54b: flange portion 6: packing 7: adhesive layer 10: combination

Abstract

La présente invention concerne : un procédé de fabrication d'inductances, permettant de fabriquer des inductances plus facilement par comparaison à la technique antérieure ; ainsi qu'une inductance obtenue selon le procédé de fabrication. Dans ledit procédé de fabrication, une inductance (1) équipée d'un corps combiné (10), qui est une combinaison d'un élément (2) de bobine et d'un noyau magnétique (3), est fabriquée. Le noyau magnétique (3) est constitué d'une combinaison d'une pluralité de composants de noyau (sections extérieures (33, 34) de noyau et noyau fendu (31m)) et d'une plaque entretoise (31g). Un adhésif durcissant à température ambiante est utilisé pour joindre les composants (31m, 33, 34) de noyau et la plaque entretoise (31g). Ainsi, le processus de durcissement, qui était réalisé lorsqu'un adhésif thermodurcissable selon la technique antérieure était utilisé, peut être éliminé. Dans l'inductance (1) finie, une couche (7) d'adhésif est formée entre les composants (31m, 33, 34) de noyau et la plaque entretoise (31g).
PCT/JP2012/062313 2011-06-21 2012-05-14 Inductance et procédé pour sa fabrication WO2012176558A1 (fr)

Applications Claiming Priority (2)

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JP2011-137847 2011-06-21
JP2011137847A JP2013004932A (ja) 2011-06-21 2011-06-21 リアクトル、およびその製造方法

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WO2012176558A1 true WO2012176558A1 (fr) 2012-12-27

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EP3089178A1 (fr) * 2015-04-28 2016-11-02 Kitagawa Industries Co., Ltd. Noyau magnétique
CN107924754A (zh) * 2015-09-11 2018-04-17 株式会社自动网络技术研究所 电抗器

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