WO2020066562A1 - Dispositif de bobine et boîte de jonction électrique - Google Patents

Dispositif de bobine et boîte de jonction électrique Download PDF

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Publication number
WO2020066562A1
WO2020066562A1 PCT/JP2019/035326 JP2019035326W WO2020066562A1 WO 2020066562 A1 WO2020066562 A1 WO 2020066562A1 JP 2019035326 W JP2019035326 W JP 2019035326W WO 2020066562 A1 WO2020066562 A1 WO 2020066562A1
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WO
WIPO (PCT)
Prior art keywords
coil device
pair
leg
gap
windings
Prior art date
Application number
PCT/JP2019/035326
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English (en)
Japanese (ja)
Inventor
一輝 増田
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2020066562A1 publication Critical patent/WO2020066562A1/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
    • 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
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers

Definitions

  • This specification discloses a technique relating to a coil device and an electric junction box.
  • Patent Literature 1 describes a coupling transformer including an I-shaped core around which two windings are wound, and two E-shaped cores sandwiching the I-shaped core from both sides. According to this coupling transformer, the leakage magnetic flux to the outside of the E-shaped core is reduced as compared with the conventional shape in which the winding is wound on both side legs of the two E-shaped cores. I have.
  • Patent Document 1 described above has a configuration in which an I-shaped core is stacked on one E-shaped core, and the other E-shaped core is further stacked thereon, so that the dimension in the direction in which the cores are stacked becomes large. There is a problem that the size of the coupling transformer is easily increased.
  • the coil device described in the present specification has a pair of opposed walls arranged to face each other, and a plurality of first legs protruding to a side where the opposed walls face each other in different regions of each of the opposed walls.
  • a coil device comprising: a core of a magnetic material; and a plurality of windings wound around the plurality of first legs, wherein the pair of opposed walls extend to a region outside the plurality of windings.
  • a second leg that projects toward the other opposing wall and forms a gap with the other opposing wall at a position that does not pass through the central axis and a second direction orthogonal to the first direction; Part is provided.
  • the magnetic flux generated by the current flowing through each winding passes through the first leg, and the first magnetic flux passes through the second leg, the gap, and the other opposing wall in the extension of one opposing wall.
  • the magnetic flux configured to include the second leg can reduce the leakage magnetic flux to the outside of the core.
  • the second leg provided on the extension of the facing wall has a first direction orthogonal to the plurality of central axes of the plurality of windings, and a second direction orthogonal to the center axis and the first direction.
  • the second leg portion can be arranged in an extra space of the coil device, so that it is possible to suppress an increase in the size of the coil device. Therefore, it is possible to suppress an increase in the size of the coil device while reducing the leakage magnetic flux.
  • the pair of opposing walls are provided with a pair of the second legs opposing each other, and the gap is formed between the pair of the second legs.
  • the opposing wall has a polygonal plate shape, and the second leg is disposed at a corner of the polygon on the opposing wall.
  • a third leg portion is provided in a region between the adjacent windings in the opposing wall, protrudes toward the other opposing wall side, and forms a gap portion with the other opposing wall.
  • the winding is a flat wire having a turn portion extending in an annular shape and a terminal portion protruding outward from an end of the turn portion and connectable to the outside.
  • the base end side of the terminal portion has a bent portion bent from the inside of the outer periphery of the turn portion passing through the first direction in the first direction, and the second leg portion has It is located in the area outside the bend.
  • the opposing wall is sized to include the entire area of the turn part.
  • a gap portion having a smaller gap size than the gap portion of the second leg portion is formed on the first leg portion.
  • An electric connection box including the coil device, a circuit board connected to the winding, and a case covering the coil device and the circuit board.
  • the plurality of windings are configured to flow currents having different phases.
  • FIG. 4 is a plan view showing a state where a pair of windings is assembled to one of the divided members.
  • Embodiment 1 will be described with reference to FIGS.
  • the electric connection box 10 is disposed on a power supply path between a power supply such as a battery of a vehicle and a load including a vehicle-mounted electric component such as a lamp and a wiper and a motor, and is used for a DC-DC converter and an inverter, for example. be able to.
  • a power supply such as a battery of a vehicle
  • a load including a vehicle-mounted electric component such as a lamp and a wiper and a motor
  • a DC-DC converter and an inverter for example. be able to.
  • the electric junction box 10 can be arranged in any orientation, the following description will be made assuming that the X direction in FIG. 2 is forward, the Y direction is left, and the Z direction in FIG. 1 is upward.
  • the electric connection box 10 includes a circuit board 11, a coil device 20 mounted on the circuit board 11, and a case 13 for housing the circuit board 11 and the coil device 20.
  • the circuit board 11 has a rectangular shape, for example, and uses a printed board in which a conductive path made of a copper foil or the like is formed by a printed wiring technique on an insulating plate made of an insulating material.
  • a circuit board may be configured by attaching a bus bar made of a metal plate material such as copper or a copper alloy to a printed board with an adhesive or the like.
  • a plurality of terminal insertion holes 12 through which the respective terminal portions 23 of the coil device 20 are inserted are formed in the circuit board 11, and the respective terminal portions 23 are soldered while being inserted into the terminal insertion holes 12. It is electrically connected to the conductive path of the circuit board 11.
  • the coil device 20 includes two (plural) windings 21 and a magnetic core 30 around which the two windings 21 are wound.
  • Each winding 21 is made of, for example, copper or a copper alloy, and is a so-called edgewise coil, and has a flat rectangular wire having a flat rectangular cross section, and has a central axis such that the short side is an inner diameter surface and an outer diameter surface. It is formed by spirally winding around A1 and A2, and a coating such as enamel is formed on the outer surface.
  • the winding 21 has an annular turn portion 22 and a pair of terminal portions 23 connected to the outside.
  • the number of turns of the turn portion 22 is generally two in this embodiment, but is not limited to this, and the number of turns can be changed as appropriate.
  • the pair of terminal portions 23 are connected to the turn portion 22, are led out of the core 30, and are bent in an L-shape at the front side of the core 30. 12 and soldered.
  • the inner terminal part 23 of the pair of terminal parts 23 of each winding 21 is connected to a first straight line D1 passing through both the center axis A1 and the center axis A2 on the outer periphery of the turn part 22. At the intersecting position P2, it extends linearly forward in the tangential direction of the turn portion 22.
  • the outer terminal portion 23 of the pair of terminal portions 23 is positioned such that the terminal portion 23 is located on the inner side (the other winding 21 side) of the outer periphery of the turn portion 22 at a position P1 intersecting with the first straight line D1.
  • a bent portion 24 is provided so as to extend to the side (the direction along the tangential direction of the turn portion 22 at the position P1).
  • the two windings 21 are arranged on the same plane in a direction inverted by 180 degrees, and when the windings 21 are energized by PWM (Pulse Width Modulation) control of a circuit formed by the circuit board 11, the two windings 21 are connected to each other. Since a current of the opposite phase flows, a magnetic flux is generated from the winding 21 in the same direction (vertical direction) of the central axes A1 and A2.
  • PWM Pulse Width Modulation
  • the core 30 is made of a magnetic material having a high magnetic permeability such as ferrite and has a shape covering the outside of the winding 21. As shown in FIGS. 6 and 7, a pair of upper and lower split members 31A and 31B are combined. It is configured. Each of the divided members 31A and 31B is provided with a pair of opposing walls 32A and 32B arranged opposite to each other, and a plurality of circles protruding in a direction in which the pair of opposing walls 32A and 32B oppose each other and inserted inside the winding 21. A first leg 40 having a columnar shape, and these are integrally formed.
  • each of the opposed walls 32A and 32B has a rectangular plate shape, and has a winding facing portion in a region where the winding 21 is arranged (a region inside the outer periphery of the winding 21). 33, an extension portion 34 extending outside the two windings, and a winding intermediate portion 37 in a region between the two windings 21.
  • the extension 34 is provided at a position including the corners of the opposing walls 32A, 32B.
  • a second leg 35 is provided at a corner (edge) of the extension 34 so as to project toward the other opposing wall 32B (32A).
  • a third leg 39 protruding toward the 32B (32A) side is provided.
  • the second leg 35 is provided at each of the four corners of the opposing walls 32A, 32B, and has a pentagonal (polygonal) shape including the end faces of the corners of the opposing walls 32A, 32B. It is notched so as to escape from the outer periphery of the winding 21.
  • the third leg 39 includes a hexagonal shape (polygon) that includes the end surfaces of the edges of the opposing walls 32A and 32B and is long in the left-right direction.
  • a gap between the pair of first leg portions 40 protruding from the upper and lower opposing walls 32A and 32B is a first gap portion G1, and a pair of the upper and lower opposing walls 32A and 32B is formed.
  • the gap between the second legs 35, 35 is a second gap G2
  • the gap between the pair of third legs 39, 39 of the upper and lower opposing walls 32A, 32B is a third gap G3. I have.
  • the size of the first gap G1 is smaller than the size of the second gap G2, and the size of the third gap G3 is substantially the same as the size of the second gap G2.
  • the relative positions between the division members 31A and 31B are different.
  • a spacer made of a synthetic resin or the like is sandwiched between the divided members 31A and 31B (for example, the gap portions G1 and G2), or a potting material (for example, a silicone resin or the like) is provided inside the core 30 (with the pair of windings 21 assembled). ) May be filled and solidified to maintain a predetermined interval between the divided members 31A and 31B.
  • a positioning means (not shown) for individually positioning both the divided member 31A and the divided member 31B with respect to the circuit board 11 and the case 13 is provided. (Shown).
  • the case 13 is made of, for example, metal or synthetic resin, and is configured by fitting an upper case 14 and a lower case 15 as shown in FIG. 1 and is screwed with, for example, screws (not shown).
  • a method for manufacturing the electric junction box 10 will be described.
  • a pair of first leg portions 40 of one core 30 are inserted into the insides of the two windings 21, and the other core 30 is opposed to the one core 30.
  • the coil device 20 is formed by inserting the pair of first leg portions 40 of the other core 30 inside (FIG. 3).
  • an electronic component EP such as a field effect transistor (FET) as a switching element is surface-mounted on the circuit board 11 by, for example, reflow soldering.
  • FET field effect transistor
  • the terminal portion 23 of the coil device 20 is inserted into the terminal insertion hole 12 of the circuit board 11, and the coil device 20 is mounted on the circuit board 11.
  • the terminal portion 23 is soldered to the conductive path of the circuit board 11 by, for example, flow soldering.
  • the electric connection box 10 FIG. 1
  • a holding piece (not shown) made of a metal plate for holding the coil device 20 with an elastic force is fixed to the case 13, and the elasticity of the holding piece is adjusted.
  • the coil device 20 may be pressed against the circuit board 11 by force.
  • the coil device 20 includes a pair of opposing walls 32A and 32B disposed opposite to each other, and a plurality of first legs 40 projecting to a side where the opposing walls 32A and 32B oppose each other in different regions of the opposing walls 32A and 32B.
  • the coil device 20 includes a magnetic core 30 having the following structure and two (plural) windings 21 wound around the plurality of first legs 40.
  • a pair of opposing walls 32A and 32B An extension 34 is provided in a region outside the two windings 21, and the extension 34 of at least one of the pair of opposed walls 32 ⁇ / b> A and 32 ⁇ / b> B has two The first direction D1 orthogonal to the plurality of center axes A1 and A2 of the winding 21 and the second direction D2 orthogonal to the center axes A1 and A2 and the first direction D1 do not pass through.
  • Second leg 35 to form a second gap portion G2 between the B (32A) is provided.
  • the magnetic flux ⁇ 1 generated by the current flowing through each winding 21 passes through the first leg 40 and extends from one of the opposed walls 32A (32B). It returns to the first leg 40 via the second leg 35, the second gap G2, and the other opposing wall 32B (32A) at 34. Accordingly, compared with the configuration in which the second legs 35 are not provided on the opposing walls 32A and 32B, the magnetic flux including the second legs 35 can reduce the leakage magnetic flux to the outside of the core 30. .
  • the second leg 35 provided on the extension 34 of the opposing walls 32A, 32B has a first direction D1 orthogonal to the plurality of center axes A1, A2 of the pair of (plural) windings 21 and a center axis. Since it is provided at a position that does not pass through A1, A2 and the second direction D2 orthogonal to the first direction D1, the second leg 35 can be arranged in an extra space of the coil device 20. Therefore, it is possible to suppress an increase in the size of the coil device 21 in the direction of the central axes A1 and A2 while reducing the leakage magnetic flux of the coil device 20.
  • the core 30 has a pair of divided members 31A and 31B facing each other.
  • the opposing wall 32A of the divided member 31A and the opposing wall 32B of the divided member 31B have a pair of second legs 35 facing each other.
  • the second gap portion G2 is formed between the pair of second leg portions 35. This makes it possible to easily assemble the coil device 20 while simplifying the configuration of the core 30.
  • the opposing walls 32A and 32B are rectangular (polygonal) plates, and the second leg 35 is disposed at a rectangular corner of the opposing walls 32A and 32B. With this configuration, the second leg 35 can be disposed in an empty space without increasing the size of the core 30, and thus the coil device 20 can be easily reduced in size.
  • the third leg 39 is disposed in a region between the winding intermediate portions 37 (between the adjacent windings 21 on the opposed walls 32A and 32B).
  • the winding 21 is a flat wire including a turn portion 22 extending annularly and a terminal portion 23 protruding outward from an end of the turn portion 22 and connectable to the outside. By doing so, it is possible to reduce the size in the direction of the central axes A1 and A2 while increasing the cross-sectional area of the winding 21.
  • the base end side of the terminal portion 23 has a bent portion 24 that is bent from the inside of the outer periphery of the turn portion 22 passing through the first direction D1 in the first direction D1, and the second leg portion.
  • Reference numeral 35 is arranged in a region outside the bent portion 24. In this way, by providing the bent portion 24, a space for disposing the second leg portion 35 on the extension portion 34 can be formed.
  • a first gap portion G1 having a smaller gap size than the second gap portion G2 is formed in the first leg portion 40.
  • the magnetic resistance of the closed magnetic path formed by the pair of first legs 40 is smaller than the magnetic resistance of the closed magnetic path passing through the second legs 35, so that the magnetic flux generally has a larger loss than the DC component. Is passed through the closed magnetic path passing through the pair of first legs 40, so that the loss can be reduced.
  • the pair of (plural) windings 21 are configured to flow currents having opposite phases (currents having different phases). With this configuration, the magnetic fluxes of the DC components passing through the pair of first legs 40 have the same magnitude and opposite phases, and thus are formed by the two windings 21 and pass through the pair of first legs 40. The magnetic flux of the DC component can be canceled. In addition, since the DC component of the magnetic flux mainly passes through the closed magnetic path passing through the second leg 35, magnetic saturation can be suppressed by the second gap G2.
  • the winding 21 is an edgewise coil, but is not limited to this.
  • a winding formed by winding a wire (such as a round wire) or a pattern-shaped winding 21 may be laminated on a laminated substrate.
  • two windings 21 are provided in the coil device, three or more windings may be provided in the coil device.
  • the phase of the switching cycle of each winding 21 by PWM control may be different by 120 degrees.
  • the second leg 35 is provided on each of the pair of opposed walls 32A, 32B, but may be provided on only one of the pair of opposed walls 32A, 32B. Further, four (plural) second leg portions 35 are provided on each of the opposed walls 32A and 32B, but the present invention is not limited to this. For example, a configuration in which one second leg 35 is provided on each of the opposed walls 32A and 32B may be adopted. Further, in addition to the second leg 35, the third leg 39 is provided between the adjacent windings 21. However, the present invention is not limited to this, and the third leg 39 may not be provided.
  • the opposing walls 32A and 32B have a rectangular shape, but are not limited thereto.
  • a shape having a curved surface on the outer periphery such as a polygon other than a rectangle or an ellipse may be used.
  • the bent portion 24 is provided between the turn portion 22 and the terminal portion 23, the bent portion 24 is not provided, and both of the pair of terminal portions 23 have a shape extending in a tangential direction of the outer periphery of the turn portion 22. Is also good.
  • the terminal portion 23 is L-shaped, but is not limited to this, and may be a linearly extending terminal portion. In this case, for example, the coil device is arranged so that the coil device stands upright (upright) relative to the circuit board 11. May be.
  • the opposing walls 32A and 32B are not limited to the size including the entire area of the turn portion 22.
  • an opposing wall that is smaller than the entire area of the turn part 22 and that exposes a part of the turn part 22 may be provided.
  • the dimensions of the first gap section G1, the second gap section G2, and the third gap section G3 are not limited to the dimensions of the above embodiment.
  • the dimensions of the first gap G1, the second gap G2, and the third gap G3 may be the same.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

La présente invention concerne un dispositif de bobine 20 qui comprend: un noyau 30 qui est un corps magnétique qui a une paire de parois opposées 32A, 32B qui sont disposées de manière à se faire face et une pluralité de premières parties de patte 40 qui font saillie en direction des côtés vers lesquels les parois opposées 32A, 32B se font face au niveau de différentes surfaces des parois opposées 32A, 32B et une pluralité d'enroulements 21 qui sont enroulés sur la pluralité de premières parties de patte 40. La paire de parois opposées 32A, 32B du dispositif de bobine 20 comprend une partie d'extension 34 qui s'étend dans une zone qui est à l'extérieur de la pluralité d'enroulements 21. A un emplacement qui n'est pas traversé par une première direction D1 qui est orthogonale à une pluralité d'axes centraux A1, A2 de la pluralité d'enroulements 21 ou par des secondes directions D2 qui sont orthogonales aux axes centraux A1, A2 et à la première direction D1, la partie d'extension 34 d'au moins l'une des parois opposées 32A, 32B de la paire de parois opposées 32A, 32B est pourvue d'une seconde partie de patte 35 qui fait saillie vers le côté de l'autre paroi opposée 32B (32A) et forme une seconde partie d'espace G2 avec l'autre paroi opposée 32B (32A).
PCT/JP2019/035326 2018-09-28 2019-09-09 Dispositif de bobine et boîte de jonction électrique WO2020066562A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018183640A JP2020053624A (ja) 2018-09-28 2018-09-28 コイル装置及び電気接続箱
JP2018-183640 2018-09-28

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WO2020066562A1 true WO2020066562A1 (fr) 2020-04-02

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004103316A (ja) * 2002-09-06 2004-04-02 Minebea Co Ltd 放電灯点灯装置
JP2004297862A (ja) * 2003-03-26 2004-10-21 Toko Inc ２出力インバータトランス
JP2006108573A (ja) * 2004-10-08 2006-04-20 Sumida Corporation 多連トランス
JP2010267816A (ja) * 2009-05-14 2010-11-25 Tdk-Lambda Corp トランスおよびチョークコイル
US20140266530A1 (en) * 2013-03-15 2014-09-18 General Electric Company Integrated magnetic assemblies and methods of assembling same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004103316A (ja) * 2002-09-06 2004-04-02 Minebea Co Ltd 放電灯点灯装置
JP2004297862A (ja) * 2003-03-26 2004-10-21 Toko Inc ２出力インバータトランス
JP2006108573A (ja) * 2004-10-08 2006-04-20 Sumida Corporation 多連トランス
JP2010267816A (ja) * 2009-05-14 2010-11-25 Tdk-Lambda Corp トランスおよびチョークコイル
US20140266530A1 (en) * 2013-03-15 2014-09-18 General Electric Company Integrated magnetic assemblies and methods of assembling same

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