WO2021059829A1 - Magnetic core, inductor - Google Patents

Magnetic core, inductor Download PDF

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Publication number
WO2021059829A1
WO2021059829A1 PCT/JP2020/032073 JP2020032073W WO2021059829A1 WO 2021059829 A1 WO2021059829 A1 WO 2021059829A1 JP 2020032073 W JP2020032073 W JP 2020032073W WO 2021059829 A1 WO2021059829 A1 WO 2021059829A1
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WIPO (PCT)
Prior art keywords
leg
core
length
hole
heat sink
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PCT/JP2020/032073
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French (fr)
Japanese (ja)
Inventor
一輝 増田
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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
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Publication of WO2021059829A1 publication Critical patent/WO2021059829A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • 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
    • 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
    • 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

  • the present disclosure relates to a magnetic core and an inductor.
  • the reactor referred to in Patent Document 1 below employs an E-type core and an I-type core.
  • the I-type core is provided with a notch, and the E-type core is joined while providing a gap. Such a gap is provided to meet a predetermined electrical specification.
  • Patent Document 2 exemplifies a phase shift (shift) type full bridge type power supply circuit.
  • an object of the present disclosure is to provide a technique for making it difficult for the inductance of an inductor that uses the magnetic core to fluctuate even if the positions of the two cores are displaced in the magnetic core having the two cores. ..
  • the magnetic core of the present disclosure includes a first core and a second core.
  • the first core has a yoke, a first leg, a second leg, and a third leg.
  • the second core has a first surface, a second surface, and a third surface.
  • the yoke extends along the first direction. All of the first leg, the second leg, and the third leg are connected to the yoke on the side opposite to the second core.
  • Each of the first leg, the second leg, and the third leg extends along a second direction orthogonal to the first direction.
  • the second leg, the first leg, and the third leg are arranged in this order along the first direction.
  • the first surface faces the first leg in the second direction.
  • the second surface faces the second leg in the second direction.
  • the third surface faces the third leg in the second direction.
  • the second core exhibits a recess in which the first surface recedes with respect to the first core along the second direction rather than either of the second surface and the third surface.
  • the first distance separating the first surface and the first leg is a second distance separating the second surface and the second leg, and a third distance separating the third surface and the third leg. Greater than any of.
  • the first length of the first surface in the first direction is longer than the second length of the first leg in the first direction.
  • the third length of the second surface in the first direction is longer than the fourth length of the second leg in the first direction.
  • the fifth length of the third surface in the first direction is longer than the sixth length of the third leg in the first direction.
  • the inductance of the inductor that uses the magnetic core is unlikely to fluctuate even if the position of the first core and the position of the second core deviate from each other.
  • FIG. 1 is a perspective view showing a configuration of a magnetic core and its surroundings according to an embodiment.
  • FIG. 2 is a perspective view showing the configuration of the magnetic core and its surroundings according to the embodiment.
  • FIG. 3 is a cross-sectional view showing the configuration of the magnetic core and its surroundings according to the embodiment.
  • FIG. 4 is a circuit diagram illustrating the configuration of a converter using an inductor.
  • FIG. 5 is a cross-sectional view showing the configuration of the magnetic core and its surroundings subject to deformation.
  • the magnetic core of the present disclosure includes a first core and a second core.
  • the first core has a yoke, a first leg, a second leg, and a third leg.
  • the second core has a first surface, a second surface, and a third surface.
  • the yoke extends along the first direction. All of the first leg, the second leg, and the third leg are connected to the yoke on the side opposite to the second core.
  • Each of the first leg, the second leg, and the third leg extends along a second direction orthogonal to the first direction.
  • the second leg, the first leg, and the third leg are arranged in this order along the first direction.
  • the first surface faces the first leg in the second direction.
  • the second surface faces the second leg in the second direction.
  • the third surface faces the third leg in the second direction.
  • the second core exhibits a recess in which the first surface recedes with respect to the first core along the second direction rather than either of the second surface and the third surface.
  • the first distance separating the first surface and the first leg is a second distance separating the second surface and the second leg, and a third distance separating the third surface and the third leg. Greater than any of.
  • the first length of the first surface in the first direction is longer than the second length of the first leg in the first direction.
  • the third length of the second surface in the first direction is longer than the fourth length of the second leg in the first direction.
  • the fifth length of the third surface in the first direction is longer than the sixth length of the third leg in the first direction.
  • the inductor of the present disclosure includes a magnetic core of the present disclosure, a printed circuit board, and a heat sink.
  • the printed circuit board has an insulating plate and a coil, and the insulating plate has a first hole.
  • the second hole and the third hole are opened, the first leg penetrates the first hole, the second leg penetrates the second hole, and the third leg penetrates the third hole.
  • the coil is placed around the first hole, wound around the first leg, and the printed circuit board is supported by the heat sink in the second direction.
  • Such an inductor is advantageous in that the coil is arranged away from the first leg and the first surface, which function as an air gap for adjusting the inductance.
  • the printed circuit board is fixed to the heat sink, and at least the second core and at least a part of the first leg, the second leg, and the third leg on the second core side are formed by the heat sink.
  • the second core Surrounded in the first direction, the second core is restricted in movable length in the first direction by the heat sink to a maximum value or less, and the first direction of the second hole and the inner surface of the heat sink.
  • the minimum value of the distance between the third hole and the inner surface of the heat sink in the first direction is larger than the maximum value, and the first value of the first surface is larger than the maximum value.
  • the length in the direction is larger than the sum of the length at which the first hole opens along the first direction and the maximum value, and the length of the second surface in the first direction is such that the second hole is said. It is larger than the sum of the length of opening along the first direction and the maximum value, and the length of the third surface in the first direction is the length of the third hole opening along the first direction and the above. It is preferably larger than the sum
  • the region facing the first leg in the second direction in the second core fits in the first surface and the first distance is maintained, and in the second core.
  • the region facing the second leg in the second direction fits in the second surface and the second distance is maintained, and the region facing the third leg in the second direction in the second core fits in the third surface and the third distance. Is maintained.
  • FIG. 1 is a perspective view showing a configuration (hereinafter, tentatively referred to as “device configuration”) 7 of the magnetic core 5 and its surroundings. However, the device configuration 7 is shown separately from each other in the Z direction.
  • the magnetic core 5 includes a first core 1 and a second core 3. Both the first core 1 and the second core 3 are magnetic materials, and for example, ferrite is used as a material.
  • the first core 1 has a yoke 100, a first leg 101, a second leg 102, and a third leg 103.
  • the yoke 100 extends along the X direction, which is the first direction, and the first leg 101, the second leg 102, and the third leg 103 all have the yoke 100 on the side opposite to the second core 3. Be connected.
  • Each of the first leg 101, the second leg 102, and the third leg 103 extends along the Z direction, which is the second direction.
  • the Z direction is orthogonal to the X direction.
  • FIG. 2 is a perspective view showing a state in which the device configuration 7 is arranged without separating the components shown in FIG. 1.
  • the device configuration 7 is actually used, it is used in such a state.
  • the first core 1 is, for example, a so-called E-shaped core, and exhibits an E-shape when viewed from the Y direction, which is the third direction.
  • the Y direction is orthogonal to both the X direction and the Z direction.
  • the second leg 102, the first leg 101, and the third leg 103 are arranged in this order along the X direction.
  • FIG. 3 is a cross-sectional view of the device configuration 7.
  • FIG. 3 shows a cross section of the apparatus configuration 7 seen from the side opposite to the Y direction at the position AA of FIG.
  • the second core 3 has a first surface 311 and a second surface 312 and a third surface 313.
  • the first surface 311 faces the first leg 101 in the Z direction.
  • the second surface 312 faces the second leg 102 in the Z direction.
  • the third surface 313 faces the third leg 103 in the Z direction. Therefore, the second surface 312, the first surface 311 and the third surface 313 are arranged in this order along the X direction.
  • the first region 301 is an region facing the first leg 101 in the Z direction in the second core 3.
  • the first region 301 fits on the first surface 311.
  • the second region 302 is a region facing the second leg 102 in the Z direction in the second core 3.
  • the second region 302 fits on the second surface 312.
  • the third region 303 is a region facing the third leg 103 in the Z direction in the second core 3.
  • the third region 303 fits in the third surface 313.
  • the second core 3 is close to a so-called I-shaped core, for example, and has an almost I-shaped shape when viewed from the Y direction. However, the second core 3 exhibits a recess 300. In the recess 300, the first surface 311 recedes with respect to the first core 1 along the Z direction more than either of the second surface 312 and the third surface 313.
  • the distance z1 is the distance separating the first surface 311 and the first leg 101.
  • the distance z2 is a distance separating the second surface 312 and the second leg 102.
  • the distance z3 is a distance separating the third surface 313 and the third leg 103.
  • the distance z1 is larger than any of the distances z2 and z3.
  • the printed circuit board 2 has an insulating plate 204 and a coil 205.
  • the first hole 201, the second hole 202, and the third hole 203 are opened in the insulating plate 204.
  • the first leg 101 penetrates the first hole 201.
  • the second leg 102 penetrates the second hole 202.
  • the third leg 103 penetrates the third hole 203.
  • the length x201 of the first hole 201 opening along the X direction, the length x202 of the second hole 202 opening along the X direction, the length x203 of the third hole 203 opening along the X direction, the first The length x101 of the leg 101 in the X direction, the length x102 of the second leg 102 in the X direction, and the length x103 of the third leg 103 in the X direction are introduced, and x201> x101, x202> x102, x203> x103 are established. To do.
  • the amount of displacement of the first leg 101 with respect to the printed circuit board 2 is limited by the first hole 201, the second leg 102 by the second hole 202, and the third leg 103 by the third hole 203. ..
  • the first leg 101, the second leg 102, and the third leg 103 are connected to the yoke 100. Therefore, it can be seen that the first hole 201, the second hole 202, and the third hole 203 limit the amount of deviation of the first core 1 with respect to the printed circuit board 2.
  • the coil 205 is arranged around the first hole 201 and wound around the first leg 101.
  • the coil 205 is drawn using a broken line as a hidden line in FIGS. 1 and 2.
  • the coil 205 has a first layer 205a and a second layer 205b.
  • the first layer 205a is arranged closer to the first core 1 than the second layer 205b.
  • the first layer 205a and the second layer 205b are electrically connected to each other using well-known techniques at positions other than position AA, and thus at locations not appearing in FIG.
  • the first layer 205a is connected to another electronic element (not shown) on the side opposite to the connection point with the second layer 205b.
  • the second layer 205b is connected to another component (not shown) on the side opposite to the connection point with the first layer 205a.
  • the component can be mounted on the surface of the insulating plate 204, which is different from the layer on which the coil 205 is arranged, for example, on the surface of the insulating plate 204 so as to overlap the coil 205 in the Z direction.
  • the coil 205 constitutes the inductor 6 together with the magnetic core 5. It can be said that the magnetic core 5 constitutes the inductor 6 together with the printed circuit board 2.
  • FIG. 4 is a circuit diagram illustrating the configuration of a converter 8 using the inductor 6.
  • the converter 8 is a full bridge type DC-DC converter.
  • the transformer T has a pair of primary side terminals 11a, 11b and three secondary side terminals 21a, 21b, 21c.
  • the terminal 21c functions as an intermediate tap of the transformer T.
  • the inductor La having one end connected to the terminal 11a inside the transformer T equivalently indicates the leakage inductance on the primary side of the transformer T.
  • Switching elements Q1, Q2, Q3, Q4 and diodes D1 and D2 are provided between the power supply lines H1 and L1 on the primary side of the transformer T.
  • the power supply line H1 has a higher potential than the power supply line L1.
  • the switching elements Q1 and Q2 are connected in series between the power supply lines H1 and L1.
  • the switching elements Q3 and Q4 are connected in series between the power supply lines H1 and L1.
  • the diodes D1 and D2 are connected in series between the power supply lines H1 and L1.
  • the anode of diode D1 and the cathode of diode D2 are connected to terminal 11a.
  • the cathode of the diode D1 is connected to the power line H1.
  • the anode of the diode D2 is connected to the power line L1.
  • the terminal 11a is connected to the connection point P1 to which the switching elements Q1 and Q2 are connected via the inductor 6.
  • the terminal 11b is connected to the connection point P2 to which the switching elements Q3 and Q4 are connected to each other.
  • Switching elements Q101 and Q102, an inductor Lc, and a capacitor Cd are provided on the secondary side of the transformer T.
  • the capacitor Cd is provided between the power supply lines H2 and L2.
  • the power supply line H2 has a higher potential than the power supply line L2.
  • the power line L2 is grounded, for example.
  • One end of the switching element Q101 is connected to the terminal 21b, and the other end is connected to the power supply line L2.
  • One end of the switching element Q102 is connected to the terminal 21a, and the other end is connected to the power supply line L2.
  • One end of the inductor Lc is connected to the terminal 21c, and the other end is connected to the power supply line H2.
  • the switching elements Q1, Q2, Q3, Q4, Q101, and Q102 are all realized by using, for example, a field effect transistor.
  • the operation of the converter 8 having the above configuration for example, the timing at which the switching elements Q1, Q2, Q3, Q4, Q101, and Q102 are switched is well known. Therefore, the description of the operation is omitted in the present embodiment.
  • the inductor 6 functions as a so-called resonance coil and regenerates energy through the diodes D1 and D2, thereby reducing the surge voltage on the secondary side of the transformer T. Since such a technique is also known, the description of the technique is omitted here (see, for example, Patent Document 2).
  • connection point P1 With the switching of Q1 to Q4, the potential of the connection point P1 with respect to the connection point P2 repeats positive, zero, negative, and zero.
  • the magnetic flux leaking to the outside of the core from the air gap (air gap) provided for inductance adjustment in the core interlinks with the winding itself of the resonance coil. ..
  • This magnetic flux causes a large eddy current loss. From this point of view, as described above, the notch portion is adopted in Patent Document 1.
  • the magnetic core 5 in the present embodiment also has a relationship of z1> z2, z1> z3, and the space between the first leg 101 and the first region 301 functions as an air gap for inductance adjustment.
  • the second core 3 has a structure obtained by providing a recess 300 with respect to a normal I-type core. Such a structure is obtained by cutting one place with respect to a normal type I core, which is advantageous from the viewpoint of managing the distance z1.
  • the heat sink 4 has a recess 400 on the Z direction side, and the recess 400 has a second core 3 and at least the second core 3 side of each of the first leg 101, the second leg 102, and the third leg 103.
  • the second core 3 is not shown in order to avoid complication of the drawing. It can be said that the second core 3 and at least a part of the first leg 101, the second leg 102, and the third leg 103 on the second core 3 side are surrounded by the heat sink 4 in the X direction and the Y direction. ..
  • the printed circuit board 2 is supported by the heat sink 4 in the Z direction. Specifically, the printed circuit board 2 is supported by the surface 401, which is the edge of the recess 400 on the Z direction side. Such support is desirable from the viewpoint of arranging the coil 205 away from the first leg 101 and the first region 301 that function as an air gap for adjusting the inductance. For example, the deeper the second core 3 is arranged with respect to the recess 400, the more the coil 205 is separated from the first leg 101 and the first region 301.
  • the length x311 of the first surface 311 in the X direction is longer than the length x101 of the first leg 101 in the X direction.
  • the length x312 of the second surface 312 in the X direction is longer than the length x102 of the second leg 102 in the X direction.
  • the length x313 of the third surface 313 in the X direction is longer than the length x103 of the third leg 103 in the X direction.
  • the deviation amount is not remarkable.
  • the first region 301 fits on the first surface 311, the second region 302 fits on the second surface 312, and the third region 303 fits on the third surface 313. Therefore, the distances z1, z2, and z3 are maintained.
  • the inductance of the inductor 6 including the leakage inductance is maintained. Even if the position of the first core 1 and the position of the second core 3 deviate from each other, the inductance of the inductor 6 using the magnetic core 5 is unlikely to fluctuate.
  • the amount that the second core 3 can move in the X direction with respect to the heat sink 4 is a distance x432 on the second surface 312 side in view of the fact that the second core 3 is surrounded by the recess 400, and the third surface 313.
  • the distance x433 on the side. Therefore, the second core 3 is movable in the heat sink 4 up to the maximum value ⁇ x432 + x433 in the X direction. It can also be seen that the heat sink 4 limits the movable length of the second core 3 in the X direction to the maximum value ⁇ or less.
  • the length x311 is longer than the sum of the maximum value ⁇ and the length x201 (x311> x201 + ⁇ ). As a result, even if the second core 3 shifts to the maximum value ⁇ along the X direction in the recess 400, the first region 301 fits in the first surface 311 and the first leg 101 and the second core 3 are aligned in the Z direction. The separating distance z1 is maintained.
  • the inner surface of the recess 400 has an inner surface 402 that is closer to the second surface 312 than the third surface 313 in the X direction, and an inner surface 403 that is closer to the third surface 313 than the second surface 312 in the X direction.
  • the second hole 202 and the inner surface 402 are separated by a distance x212
  • the third hole 203 and the inner surface 403 are separated by a distance x213.
  • the distance x212 can be regarded as the minimum value of the distance between the inner surface of the heat sink 4 and the second hole 202 in the X direction.
  • the distance x213 can be regarded as the minimum value of the distance between the inner surface of the heat sink 4 and the second hole 202 in the X direction.
  • the heat sink 4 and the printed circuit board 2 fixed to the heat sink 4 limit the movable lengths of the first core 1 and the second core 3 in the X direction. This is because the heat sink 4 is usually fixed to other configurations, and the positions of the first core 1 and the second core 3 can be easily fixed.
  • the electronic element may be arranged around the first hole 201, the second hole 202, and the third hole 203.
  • FIG. 5 is a cross-sectional view of the device configuration 7.
  • FIG. 5 shows a cross section of the apparatus configuration 7 seen from the side opposite to the X direction at the position BB of FIG.
  • the positions of the first leg 101, the second leg 102, and the third leg 103 in the Y direction are all the same, and the positions of the first hole 201, the second hole 202, and the third hole 203 in the Y direction are all the same. A case is assumed.
  • the first leg 101, the second leg 102, and the third leg 103 all have a length y100 in the Y direction.
  • the first hole 201, the second hole 202, and the third hole 203 are all opened in the Y direction by a length y200.
  • the second core 3 has a length y3 in the Y direction.
  • the inner surface 404 of the recess 400 on the Y direction side has a distance y204 with respect to the first hole 201, the second hole 202, and the third hole 203.
  • the inner surface 405 of the recess 400 on the side opposite to the Y direction has a distance y205 from the first hole 201, the second hole 202, and the third hole 203.

Abstract

The present invention makes it so that fluctuation in the inductance of an inductor is suppressed when the two magnetic cores that are used in the inductor have shifted. According to the present invention, a first core has a yoke and a first leg, a second leg, and a third leg that are connected to the yoke. The second leg, the first leg, and the third leg are aligned in that order in a first direction and extend in a second direction. A second core has a first surface, a second surface, and a third surface that are respectively opposite the first leg, the second leg, and the third leg in the second direction. The first surface is recessed further from the first core in the second direction than the second surface and the third surface, forming a recessed part in the second core. A first distance that separates the first surface and the first leg is greater than a second distance that separates the second surface and the second leg and a third distance that separates the third surface and the third leg. In the first direction, the first surface is longer than the first leg, the second surface is longer than the second leg, and the third surface is longer than the third leg.

Description

磁気コア、インダクタMagnetic core, inductor
　本開示は、磁気コア（ｃｏｒｅ）と、インダクタ（ｉｎｄｕｃｔｏｒ）とに関する。 The present disclosure relates to a magnetic core and an inductor.
　下記の特許文献１にいうリアクトル（ｒｅａｃｔｏｒ）は、Ｅ型コアとＩ型コアとを採用する。Ｉ型コアには切欠部が設けられ、ギャップが設けられつつＥ型コアが接合される。かかるギャップは所定の電気的仕様を満たすために設けられる。 The reactor referred to in Patent Document 1 below employs an E-type core and an I-type core. The I-type core is provided with a notch, and the E-type core is joined while providing a gap. Such a gap is provided to meet a predetermined electrical specification.
　下記の特許文献２は、位相シフト（ｓｈｉｆｔ）方式フルブリッジ（ｆｕｌｌ　ｂｒｉｄｇｅ）型電源回路を例示する。 Patent Document 2 below exemplifies a phase shift (shift) type full bridge type power supply circuit.
特開平４－２０６５０９号公報Japanese Unexamined Patent Publication No. 4-206509 特開２０１７－１２７０５１号公報Japanese Unexamined Patent Publication No. 2017-127051
　特許文献１において開示されるリアクトルは、Ｅ型コアとＩ型コアとがずれたとき、Ｅ型コアの側面とＩ型コアの切欠部とを隔てる距離が変わる。これは当該リアクトルのインダクタンスが不安定となる原因となる。当該距離が非常に狭くなってＥ型コアとＩ型コアとが実質的に接触すると、磁気飽和を発生させてしまう可能性もある。 In the reactor disclosed in Patent Document 1, when the E-type core and the I-type core are displaced, the distance separating the side surface of the E-type core and the notch of the I-type core changes. This causes the inductance of the reactor to become unstable. If the distance becomes very narrow and the E-type core and the I-type core come into substantial contact with each other, magnetic saturation may occur.
　そこで本開示においては、二つのコアを有する磁気コアにおいて、当該二つのコアの位置がずれても、当該磁気コアを利用するインダクタのインダクタンスを変動しにくくする技術を提供することが目的とされる。 Therefore, an object of the present disclosure is to provide a technique for making it difficult for the inductance of an inductor that uses the magnetic core to fluctuate even if the positions of the two cores are displaced in the magnetic core having the two cores. ..
　本開示の磁気コアは第１コアと第２コアとを備える。前記第１コアは、ヨークと、第１脚と、第２脚と、第３脚とを有する。前記第２コアは、第１面と、第２面と、第３面とを有する。前記ヨークは第１方向に沿って延在する。前記第１脚と、前記第２脚と、前記第３脚とのいずれもが、前記第２コアとは反対側において前記ヨークと連結される。前記第１脚と、前記第２脚と、前記第３脚とのそれぞれが、前記第１方向と直交する第２方向に沿って延在する。前記第２脚、前記第１脚、前記第３脚が、前記第１方向に沿ってこの順に並ぶ。前記第１面は前記第１脚と前記第２方向において対向する。前記第２面は前記第２脚と前記第２方向において対向する。前記第３面は前記第３脚と前記第２方向において対向する。 The magnetic core of the present disclosure includes a first core and a second core. The first core has a yoke, a first leg, a second leg, and a third leg. The second core has a first surface, a second surface, and a third surface. The yoke extends along the first direction. All of the first leg, the second leg, and the third leg are connected to the yoke on the side opposite to the second core. Each of the first leg, the second leg, and the third leg extends along a second direction orthogonal to the first direction. The second leg, the first leg, and the third leg are arranged in this order along the first direction. The first surface faces the first leg in the second direction. The second surface faces the second leg in the second direction. The third surface faces the third leg in the second direction.
　前記第２コアは、前記第１面が前記第２面と前記第３面とのいずれよりも前記第２方向に沿って前記第１コアに対して退く凹部を呈する。前記第１面と前記第１脚とを隔てる第１距離は、前記第２面と前記第２脚とを隔てる第２距離と、前記第３面と前記第３脚とを隔てる第３距離とのいずれよりも大きい。前記第１面の前記第１方向における第１長さは前記第１脚の前記第１方向における第２長さよりも長い。前記第２面の前記第１方向における第３長さは前記第２脚の前記第１方向における第４長さよりも長い。前記第３面の前記第１方向における第５長さは前記第３脚の前記第１方向における第６長さよりも長い。 The second core exhibits a recess in which the first surface recedes with respect to the first core along the second direction rather than either of the second surface and the third surface. The first distance separating the first surface and the first leg is a second distance separating the second surface and the second leg, and a third distance separating the third surface and the third leg. Greater than any of. The first length of the first surface in the first direction is longer than the second length of the first leg in the first direction. The third length of the second surface in the first direction is longer than the fourth length of the second leg in the first direction. The fifth length of the third surface in the first direction is longer than the sixth length of the third leg in the first direction.
　本開示によれば、第１コアと第２コアとを有する磁気コアにおいて、第１コアの位置と第２コアの位置とがずれても磁気コアを利用するインダクタのインダクタンスが変動しにくい。 According to the present disclosure, in a magnetic core having a first core and a second core, the inductance of the inductor that uses the magnetic core is unlikely to fluctuate even if the position of the first core and the position of the second core deviate from each other.
図１は実施形態にかかる磁気コアおよびその周辺の構成を示す斜視図である。FIG. 1 is a perspective view showing a configuration of a magnetic core and its surroundings according to an embodiment. 図２は実施形態にかかる磁気コアおよびその周辺の構成を示す斜視図である。FIG. 2 is a perspective view showing the configuration of the magnetic core and its surroundings according to the embodiment. 図３は実施形態にかかる磁気コアおよびその周辺の構成を示す断面図である。FIG. 3 is a cross-sectional view showing the configuration of the magnetic core and its surroundings according to the embodiment. 図４はインダクタを用いたコンバータの構成を例示する回路図である。FIG. 4 is a circuit diagram illustrating the configuration of a converter using an inductor. 図５は変形にかかる磁気コアおよびその周辺の構成を示す断面図である。FIG. 5 is a cross-sectional view showing the configuration of the magnetic core and its surroundings subject to deformation.
　［本開示の実施形態の説明］
　最初に本開示の実施態様が列記して説明される。
　（１）本開示の磁気コアは、第１コアと第２コアとを備える。前記第１コアは、ヨークと、第１脚と、第２脚と、第３脚とを有する。前記第２コアは、第１面と、第２面と、第３面とを有する。前記ヨークは第１方向に沿って延在する。前記第１脚と、前記第２脚と、前記第３脚とのいずれもが、前記第２コアとは反対側において前記ヨークと連結される。前記第１脚と、前記第２脚と、前記第３脚とのそれぞれが、前記第１方向と直交する第２方向に沿って延在する。前記第２脚、前記第１脚、前記第３脚が、前記第１方向に沿ってこの順に並ぶ。前記第１面は前記第１脚と前記第２方向において対向する。前記第２面は前記第２脚と前記第２方向において対向する。前記第３面は前記第３脚と前記第２方向において対向する。 [Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
(1) The magnetic core of the present disclosure includes a first core and a second core. The first core has a yoke, a first leg, a second leg, and a third leg. The second core has a first surface, a second surface, and a third surface. The yoke extends along the first direction. All of the first leg, the second leg, and the third leg are connected to the yoke on the side opposite to the second core. Each of the first leg, the second leg, and the third leg extends along a second direction orthogonal to the first direction. The second leg, the first leg, and the third leg are arranged in this order along the first direction. The first surface faces the first leg in the second direction. The second surface faces the second leg in the second direction. The third surface faces the third leg in the second direction.
　前記第２コアは、前記第１面が前記第２面と前記第３面とのいずれよりも前記第２方向に沿って前記第１コアに対して退く凹部を呈する。前記第１面と前記第１脚とを隔てる第１距離は、前記第２面と前記第２脚とを隔てる第２距離と、前記第３面と前記第３脚とを隔てる第３距離とのいずれよりも大きい。前記第１面の前記第１方向における第１長さは前記第１脚の前記第１方向における第２長さよりも長い。前記第２面の前記第１方向における第３長さは前記第２脚の前記第１方向における第４長さよりも長い。前記第３面の前記第１方向における第５長さは前記第３脚の前記第１方向における第６長さよりも長い。 The second core exhibits a recess in which the first surface recedes with respect to the first core along the second direction rather than either of the second surface and the third surface. The first distance separating the first surface and the first leg is a second distance separating the second surface and the second leg, and a third distance separating the third surface and the third leg. Greater than any of. The first length of the first surface in the first direction is longer than the second length of the first leg in the first direction. The third length of the second surface in the first direction is longer than the fourth length of the second leg in the first direction. The fifth length of the third surface in the first direction is longer than the sixth length of the third leg in the first direction.
　第１距離、第２距離、第３距離、第１長さ、第２長さ、第３長さ、第４長さ、第５長さ、第６長さについて上述の関係があることにより、第１コアの位置と第２コアの位置とがずれても磁気コアを利用するインダクタのインダクタンスが変動しにくい。 Due to the above-mentioned relationship between the first distance, the second distance, the third distance, the first length, the second length, the third length, the fourth length, the fifth length, and the sixth length, Even if the position of the first core and the position of the second core deviate from each other, the inductance of the inductor that uses the magnetic core does not easily fluctuate.
　（２）本開示のインダクタは、本開示の磁気コアと、プリント基板と、ヒートシンクとを備え、前記プリント基板は、絶縁板と、コイルとを有し、前記絶縁板には第１孔と、第２孔と、第３孔とが開口し、前記第１脚は前記第１孔を貫通し、前記第２脚は前記第２孔を貫通し、前記第３脚は前記第３孔を貫通し、前記コイルは前記第１孔の周りに配置され、前記第１脚に巻回され、前記プリント基板は前記ヒートシンクによって前記第２方向において支持される。 (2) The inductor of the present disclosure includes a magnetic core of the present disclosure, a printed circuit board, and a heat sink. The printed circuit board has an insulating plate and a coil, and the insulating plate has a first hole. The second hole and the third hole are opened, the first leg penetrates the first hole, the second leg penetrates the second hole, and the third leg penetrates the third hole. The coil is placed around the first hole, wound around the first leg, and the printed circuit board is supported by the heat sink in the second direction.
　かかるインダクタは、インダクタンス調整用のエアギャップとして機能する第１脚と第１面との間からコイルが離れて配置される点で有利である。 Such an inductor is advantageous in that the coil is arranged away from the first leg and the first surface, which function as an air gap for adjusting the inductance.
　（３）前記プリント基板は前記ヒートシンクに固定され、前記第２コアと、少なくとも前記第１脚、第２脚、第３脚のそれぞれの前記第２コア側の一部とは、前記ヒートシンクによって少なくとも前記第１方向において囲まれ、前記第２コアは、前記ヒートシンクによって前記第１方向における移動可能な長さが最大値以下に制限され、前記第２孔と前記ヒートシンクの内面との前記第１方向における隔たりの最小値は前記最大値よりも大きく、前記第３孔と前記ヒートシンクの前記内面との前記第１方向における隔たりの最小値は前記最大値よりも大きく、前記第１面の前記第１方向における長さは前記第１孔が前記第１方向に沿って開口する長さと前記最大値との和よりも大きく、前記第２面の前記第１方向における長さは前記第２孔が前記第１方向に沿って開口する長さと前記最大値との和よりも大きく、前記第３面の前記第１方向における長さは前記第３孔が前記第１方向に沿って開口する長さと前記最大値との和よりも大きいことが好ましい。 (3) The printed circuit board is fixed to the heat sink, and at least the second core and at least a part of the first leg, the second leg, and the third leg on the second core side are formed by the heat sink. Surrounded in the first direction, the second core is restricted in movable length in the first direction by the heat sink to a maximum value or less, and the first direction of the second hole and the inner surface of the heat sink. The minimum value of the distance between the third hole and the inner surface of the heat sink in the first direction is larger than the maximum value, and the first value of the first surface is larger than the maximum value. The length in the direction is larger than the sum of the length at which the first hole opens along the first direction and the maximum value, and the length of the second surface in the first direction is such that the second hole is said. It is larger than the sum of the length of opening along the first direction and the maximum value, and the length of the third surface in the first direction is the length of the third hole opening along the first direction and the above. It is preferably larger than the sum with the maximum value.
　第２コアが第１方向に沿って最大値までずれても、第２コアにおいて第１脚と第２方向において正対する領域は第１面に収まって第１距離が維持され、第２コアにおいて第２脚と第２方向において正対する領域は第２面に収まって第２距離が維持され、第２コアにおいて第３脚と第２方向において正対する領域は第３面に収まって第３距離が維持されるからである。 Even if the second core shifts to the maximum value along the first direction, the region facing the first leg in the second direction in the second core fits in the first surface and the first distance is maintained, and in the second core. The region facing the second leg in the second direction fits in the second surface and the second distance is maintained, and the region facing the third leg in the second direction in the second core fits in the third surface and the third distance. Is maintained.
　［本開示の実施形態の詳細］
　本開示の磁気コアおよびインダクタの具体例が、以下に図面を参照して説明される。なお、本開示はこれらの例示に限定されず、請求の範囲によって示され、請求の範囲と均等の意味および範囲内におけるすべての変更が含まれることが意図される。 [Details of Embodiments of the present disclosure]
Specific examples of the magnetic cores and inductors of the present disclosure will be described below with reference to the drawings. It should be noted that the present disclosure is not limited to these examples, but is indicated by the scope of claims and is intended to include all modifications within the meaning and scope of the claims.
　以下、本実施形態に係る磁気コア５が説明される。図１は、磁気コア５およびその周辺の構成（以下「装置構成」と仮称）７を示す斜視図である。但し、装置構成７はＺ方向において互いに分離して図示される。 Hereinafter, the magnetic core 5 according to the present embodiment will be described. FIG. 1 is a perspective view showing a configuration (hereinafter, tentatively referred to as “device configuration”) 7 of the magnetic core 5 and its surroundings. However, the device configuration 7 is shown separately from each other in the Z direction.
　磁気コア５は、第１コア１と第２コア３とを備える。第１コア１と第２コア３のいずれも磁性体であり、例えばフェライト（ｆｅｒｒｉｔｅ）を材料とする。第１コア１は、ヨーク（ｙｏｋｅ）１００と、第１脚１０１と、第２脚１０２と、第３脚１０３とを有する。ヨーク１００は第１方向たるＸ方向に沿って延在し、第１脚１０１と、第２脚１０２と、第３脚１０３とのいずれもが、第２コア３とは反対側においてヨーク１００と連結される。第１脚１０１と、第２脚１０２と、第３脚１０３とのそれぞれが、第２方向たるＺ方向に沿って延在する。Ｚ方向はＸ方向と直交する。 The magnetic core 5 includes a first core 1 and a second core 3. Both the first core 1 and the second core 3 are magnetic materials, and for example, ferrite is used as a material. The first core 1 has a yoke 100, a first leg 101, a second leg 102, and a third leg 103. The yoke 100 extends along the X direction, which is the first direction, and the first leg 101, the second leg 102, and the third leg 103 all have the yoke 100 on the side opposite to the second core 3. Be connected. Each of the first leg 101, the second leg 102, and the third leg 103 extends along the Z direction, which is the second direction. The Z direction is orthogonal to the X direction.
　図２は装置構成７を、図１に示された構成要素同士を分離することなく配置した状態を示す斜視図である。装置構成７は実際に使用される場合にはかかる状態において使用に供される。 FIG. 2 is a perspective view showing a state in which the device configuration 7 is arranged without separating the components shown in FIG. 1. When the device configuration 7 is actually used, it is used in such a state.
　第１コア１は例えばいわゆるＥ型コアであり、第３方向たるＹ方向から見てＥ字形状を呈する。Ｙ方向はＸ方向、Ｚ方向のいずれとも直交する。第２脚１０２、第１脚１０１、第３脚１０３はＸ方向に沿ってこの順に並ぶ。 The first core 1 is, for example, a so-called E-shaped core, and exhibits an E-shape when viewed from the Y direction, which is the third direction. The Y direction is orthogonal to both the X direction and the Z direction. The second leg 102, the first leg 101, and the third leg 103 are arranged in this order along the X direction.
　図３は装置構成７の断面図である。図３は図２の位置ＡＡにおいてＹ方向とは反対側から見た装置構成７の断面を示す。 FIG. 3 is a cross-sectional view of the device configuration 7. FIG. 3 shows a cross section of the apparatus configuration 7 seen from the side opposite to the Y direction at the position AA of FIG.
　第２コア３は、第１面３１１と、第２面３１２と、第３面３１３とを有する。第１面３１１は第１脚１０１とＺ方向において対向する。第２面３１２は第２脚１０２とＺ方向において対向する。第３面３１３は第３脚１０３とＺ方向において対向する。よって第２面３１２、第１面３１１、第３面３１３はＸ方向に沿ってこの順に並ぶ。 The second core 3 has a first surface 311 and a second surface 312 and a third surface 313. The first surface 311 faces the first leg 101 in the Z direction. The second surface 312 faces the second leg 102 in the Z direction. The third surface 313 faces the third leg 103 in the Z direction. Therefore, the second surface 312, the first surface 311 and the third surface 313 are arranged in this order along the X direction.
　第１領域３０１は第２コア３において第１脚１０１とＺ方向において正対する領域である。第１領域３０１は第１面３１１に収まる。第２領域３０２は第２コア３において第２脚１０２とＺ方向において正対する領域である。第２領域３０２は第２面３１２に収まる。第３領域３０３は第２コア３において第３脚１０３とＺ方向において正対する領域である。第３領域３０３は第３面３１３に収まる。 The first region 301 is an region facing the first leg 101 in the Z direction in the second core 3. The first region 301 fits on the first surface 311. The second region 302 is a region facing the second leg 102 in the Z direction in the second core 3. The second region 302 fits on the second surface 312. The third region 303 is a region facing the third leg 103 in the Z direction in the second core 3. The third region 303 fits in the third surface 313.
　第２コア３は例えばいわゆるＩ型コアに近く、Ｙ方向から見てほぼＩ字形状を呈する。但し、第２コア３は、凹部３００を呈する。凹部３００において、第１面３１１が第２面３１２と第３面３１３とのいずれよりもＺ方向に沿って第１コア１に対して退く。 The second core 3 is close to a so-called I-shaped core, for example, and has an almost I-shaped shape when viewed from the Y direction. However, the second core 3 exhibits a recess 300. In the recess 300, the first surface 311 recedes with respect to the first core 1 along the Z direction more than either of the second surface 312 and the third surface 313.
　具体的には図３を参照して、距離ｚ１は、第１面３１１と第１脚１０１とを隔てる距離である。距離ｚ２は、第２面３１２と第２脚１０２とを隔てる距離である。距離ｚ３は、第３面３１３と第３脚１０３とを隔てる距離である。距離ｚ１は距離ｚ２，ｚ３のいずれよりも大きい。例えば第２面３１２と第２脚１０２とが接触してｚ２＝０であり、第３面３１３と第３脚１０３とが接触してｚ３＝０である。 Specifically, referring to FIG. 3, the distance z1 is the distance separating the first surface 311 and the first leg 101. The distance z2 is a distance separating the second surface 312 and the second leg 102. The distance z3 is a distance separating the third surface 313 and the third leg 103. The distance z1 is larger than any of the distances z2 and z3. For example, the second surface 312 and the second leg 102 are in contact with each other to have z2 = 0, and the third surface 313 and the third leg 103 are in contact with each other to have z3 = 0.
　プリント（ｐｒｉｎｔ）基板２は、絶縁板２０４と、コイル（ｃｏｉｌ）２０５とを有する。絶縁板２０４には第１孔２０１と、第２孔２０２と、第３孔２０３とが開口する。第１脚１０１は第１孔２０１を貫通する。第２脚１０２は第２孔２０２を貫通する。第３脚１０３は第３孔２０３を貫通する。第１孔２０１がＸ方向に沿って開口する長さｘ２０１、第２孔２０２がＸ方向に沿って開口する長さｘ２０２、第３孔２０３がＸ方向に沿って開口する長さｘ２０３、第１脚１０１のＸ方向における長さｘ１０１、第２脚１０２のＸ方向における長さｘ１０２、第３脚１０３のＸ方向における長さｘ１０３が導入され、ｘ２０１＞ｘ１０１，ｘ２０２＞ｘ１０２，ｘ２０３＞ｘ１０３が成立する。 The printed circuit board 2 has an insulating plate 204 and a coil 205. The first hole 201, the second hole 202, and the third hole 203 are opened in the insulating plate 204. The first leg 101 penetrates the first hole 201. The second leg 102 penetrates the second hole 202. The third leg 103 penetrates the third hole 203. The length x201 of the first hole 201 opening along the X direction, the length x202 of the second hole 202 opening along the X direction, the length x203 of the third hole 203 opening along the X direction, the first The length x101 of the leg 101 in the X direction, the length x102 of the second leg 102 in the X direction, and the length x103 of the third leg 103 in the X direction are introduced, and x201> x101, x202> x102, x203> x103 are established. To do.
　かかる貫通に鑑みれば、第１脚１０１は第１孔２０１によって、第２脚１０２は第２孔２０２によって、第３脚１０３は第３孔２０３によって、それぞれプリント基板２に対するずれ量が制限される。第１脚１０１、第２脚１０２、第３脚１０３はヨーク１００と連結される。よって第１孔２０１、第２孔２０２、第３孔２０３はプリント基板２に対する第１コア１のずれ量を制限すると見ることもできる。 In view of such penetration, the amount of displacement of the first leg 101 with respect to the printed circuit board 2 is limited by the first hole 201, the second leg 102 by the second hole 202, and the third leg 103 by the third hole 203. .. The first leg 101, the second leg 102, and the third leg 103 are connected to the yoke 100. Therefore, it can be seen that the first hole 201, the second hole 202, and the third hole 203 limit the amount of deviation of the first core 1 with respect to the printed circuit board 2.
　コイル２０５は第１孔２０１の周りに配置され、第１脚１０１に巻回される。本実施形態においてはコイル２０５は絶縁板２０４の内部に配置されるので、図１および図２においてコイル２０５は隠れ線たる破線を用いて描かれる。 The coil 205 is arranged around the first hole 201 and wound around the first leg 101. In the present embodiment, since the coil 205 is arranged inside the insulating plate 204, the coil 205 is drawn using a broken line as a hidden line in FIGS. 1 and 2.
　図３を参照して、コイル２０５は第１層２０５ａと第２層２０５ｂとを有する。第１層２０５ａは第２層２０５ｂよりも第１コア１に近く配置される。第１層２０５ａと第２層２０５ｂとは位置ＡＡ以外の位置において、従って図３には現れない箇所において、周知の技術を用いて相互に電気的に接続される。第１層２０５ａは第２層２０５ｂとの接続箇所と反対側において他の電子素子（図示省略）と接続される。第２層２０５ｂは第１層２０５ａとの接続箇所と反対側において他の構成要素（図示省略）と接続される。 With reference to FIG. 3, the coil 205 has a first layer 205a and a second layer 205b. The first layer 205a is arranged closer to the first core 1 than the second layer 205b. The first layer 205a and the second layer 205b are electrically connected to each other using well-known techniques at positions other than position AA, and thus at locations not appearing in FIG. The first layer 205a is connected to another electronic element (not shown) on the side opposite to the connection point with the second layer 205b. The second layer 205b is connected to another component (not shown) on the side opposite to the connection point with the first layer 205a.
　このようにプリント基板２において多層基板を採用することが好ましい。絶縁板２０４においてコイル２０５が配置される層とは別の層、例えば絶縁板２０４の表面に、Ｚ方向においてコイル２０５と重なって部品を実装できるからである。 In this way, it is preferable to use a multilayer board for the printed circuit board 2. This is because the component can be mounted on the surface of the insulating plate 204, which is different from the layer on which the coil 205 is arranged, for example, on the surface of the insulating plate 204 so as to overlap the coil 205 in the Z direction.
　コイル２０５は磁気コア５と共にインダクタ６を構成する。磁気コア５はプリント基板２と共にインダクタ６を構成するということができる。 The coil 205 constitutes the inductor 6 together with the magnetic core 5. It can be said that the magnetic core 5 constitutes the inductor 6 together with the printed circuit board 2.
　［フルブリッジ型ＤＣ－ＤＣコンバータへの適用例］
　図４はインダクタ６を用いたコンバータ（ｃｏｎｖｅｒｔｅｒ）８の構成を例示する回路図である。図４においてコンバータ８はフルブリッジ（ｆｕｌｌ　ｂｒｉｄｇｅ）型ＤＣ－ＤＣコンバータである。 [Example of application to full-bridge DC-DC converter]
FIG. 4 is a circuit diagram illustrating the configuration of a converter 8 using the inductor 6. In FIG. 4, the converter 8 is a full bridge type DC-DC converter.
　変圧器Ｔは一対の一次側の端子１１ａ，１１ｂと、３つの二次側の端子２１ａ，２１ｂ，２１ｃとを有する。端子２１ｃは変圧器Ｔの中間タップ（ｔａｐ）として機能する。変圧器Ｔの内部において端子１１ａに接続される一端を有するインダクタＬａは、変圧器Ｔの一次側における漏れインダクタンスを等価的に示す。 The transformer T has a pair of primary side terminals 11a, 11b and three secondary side terminals 21a, 21b, 21c. The terminal 21c functions as an intermediate tap of the transformer T. The inductor La having one end connected to the terminal 11a inside the transformer T equivalently indicates the leakage inductance on the primary side of the transformer T.
　変圧器Ｔの一次側にはスイッチング素子Ｑ１，Ｑ２，Ｑ３，Ｑ４およびダイオードＤ１，Ｄ２が電源線Ｈ１，Ｌ１の間に設けられる。電源線Ｈ１は電源線Ｌ１よりも高電位である。 Switching elements Q1, Q2, Q3, Q4 and diodes D1 and D2 are provided between the power supply lines H1 and L1 on the primary side of the transformer T. The power supply line H1 has a higher potential than the power supply line L1.
　スイッチング素子Ｑ１，Ｑ２は電源線Ｈ１，Ｌ１の間において直列に接続される。スイッチング素子Ｑ３，Ｑ４は電源線Ｈ１，Ｌ１の間において直列に接続される。 The switching elements Q1 and Q2 are connected in series between the power supply lines H1 and L1. The switching elements Q3 and Q4 are connected in series between the power supply lines H1 and L1.
　ダイオードＤ１，Ｄ２は電源線Ｈ１，Ｌ１の間において直列に接続される。ダイオードＤ１のアノードおよびダイオードＤ２のカソードは端子１１ａに接続される。ダイオードＤ１のカソードは電源線Ｈ１に接続される。ダイオードＤ２のアノードは電源線Ｌ１に接続される。 The diodes D1 and D2 are connected in series between the power supply lines H1 and L1. The anode of diode D1 and the cathode of diode D2 are connected to terminal 11a. The cathode of the diode D1 is connected to the power line H1. The anode of the diode D2 is connected to the power line L1.
　スイッチング素子Ｑ１，Ｑ２同士が接続される接続点Ｐ１にはインダクタ６を介して端子１１ａが接続される。スイッチング素子Ｑ３，Ｑ４同士が接続される接続点Ｐ２には端子１１ｂが接続される。 The terminal 11a is connected to the connection point P1 to which the switching elements Q1 and Q2 are connected via the inductor 6. The terminal 11b is connected to the connection point P2 to which the switching elements Q3 and Q4 are connected to each other.
　変圧器Ｔの二次側にはスイッチング素子Ｑ１０１，Ｑ１０２およびインダクタＬｃ、コンデンサＣｄが設けられる。コンデンサＣｄは電源線Ｈ２，Ｌ２の間に設けられる。電源線Ｈ２は電源線Ｌ２よりも高電位である。電源線Ｌ２は例えば接地される。 Switching elements Q101 and Q102, an inductor Lc, and a capacitor Cd are provided on the secondary side of the transformer T. The capacitor Cd is provided between the power supply lines H2 and L2. The power supply line H2 has a higher potential than the power supply line L2. The power line L2 is grounded, for example.
　スイッチング素子Ｑ１０１の一端は端子２１ｂに接続され、他端は電源線Ｌ２に接続される。スイッチング素子Ｑ１０２の一端は端子２１ａに接続され、他端は電源線Ｌ２に接続される。インダクタＬｃの一端は端子２１ｃに接続され、他端は電源線Ｈ２に接続される。 One end of the switching element Q101 is connected to the terminal 21b, and the other end is connected to the power supply line L2. One end of the switching element Q102 is connected to the terminal 21a, and the other end is connected to the power supply line L2. One end of the inductor Lc is connected to the terminal 21c, and the other end is connected to the power supply line H2.
　スイッチング素子Ｑ１，Ｑ２，Ｑ３，Ｑ４，Ｑ１０１，Ｑ１０２はいすれも例えば電界効果トランジスタを用いて実現される。 The switching elements Q1, Q2, Q3, Q4, Q101, and Q102 are all realized by using, for example, a field effect transistor.
　上述の構成を有するコンバータ８の動作、例えばスイッチング素子Ｑ１，Ｑ２，Ｑ３，Ｑ４，Ｑ１０１，Ｑ１０２がスイッチングするタイミングは周知である。よって本実施形態において当該動作の説明は省略される。インダクタ６はいわゆる共振用コイルとして機能し、ダイオードＤ１，Ｄ２を介してエネルギーを回生させ、以て変圧器Ｔの二次側におけるサージ電圧を低減する。かかる技術も公知であるので、ここにおいて当該技術の説明も省略される（例えば特許文献２参照）。 The operation of the converter 8 having the above configuration, for example, the timing at which the switching elements Q1, Q2, Q3, Q4, Q101, and Q102 are switched is well known. Therefore, the description of the operation is omitted in the present embodiment. The inductor 6 functions as a so-called resonance coil and regenerates energy through the diodes D1 and D2, thereby reducing the surge voltage on the secondary side of the transformer T. Since such a technique is also known, the description of the technique is omitted here (see, for example, Patent Document 2).
　Ｑ１～Ｑ４のスイッチングに伴い、接続点Ｐ２に対する接続点Ｐ１の電位は、正、零、負、零が繰り返される。共振用コイルのコアにフェライトを用いる場合には、当該コアにおいてインダクタンス調整用に設けられたエアギャップ（ａｉｒ　ｇａｐ）から、コアの外部に漏れた磁束が共振用コイルの巻線自体と鎖交する。この磁束は大きな渦電流損失を発生させる。この観点から上述の様に、特許文献１においては切欠部が採用されていた。 With the switching of Q1 to Q4, the potential of the connection point P1 with respect to the connection point P2 repeats positive, zero, negative, and zero. When ferrite is used for the core of the resonance coil, the magnetic flux leaking to the outside of the core from the air gap (air gap) provided for inductance adjustment in the core interlinks with the winding itself of the resonance coil. .. This magnetic flux causes a large eddy current loss. From this point of view, as described above, the notch portion is adopted in Patent Document 1.
　本実施形態における磁気コア５においても、ｚ１＞ｚ２，ｚ１＞ｚ３の関係があり、第１脚１０１と第１領域３０１との間がインダクタンス調整用のエアギャップとして機能する。 The magnetic core 5 in the present embodiment also has a relationship of z1> z2, z1> z3, and the space between the first leg 101 and the first region 301 functions as an air gap for inductance adjustment.
　第２コア３は、通常のＩ型コアに対して凹部３００を設けることによって得られる構造を有する。かかる構造は通常のＩ型コアに対して一箇所を削ることによって得られ、距離ｚ１を管理する観点において有利である。 The second core 3 has a structure obtained by providing a recess 300 with respect to a normal I-type core. Such a structure is obtained by cutting one place with respect to a normal type I core, which is advantageous from the viewpoint of managing the distance z1.
　［ずれ量と諸寸法との関係］
　図３を参照して、ずれ量と諸寸法との関係が説明される。第２コア３と、少なくとも第１脚１０１、第２脚１０２、第３脚１０３のそれぞれの第２コア３側の一部は、ヒートシンク（ｈｅａｔ　ｓｉｎｋ）４によって少なくともＸ方向において囲まれる。 [Relationship between deviation amount and various dimensions]
The relationship between the amount of deviation and various dimensions will be described with reference to FIG. The second core 3 and at least a part of each of the first leg 101, the second leg 102, and the third leg 103 on the second core 3 side are surrounded by the heat sink 4 in at least the X direction.
　本実施形態においてはヒートシンク４はＺ方向側に凹部４００を有し、凹部４００は第２コア３と、少なくとも第１脚１０１、第２脚１０２、第３脚１０３のそれぞれの第２コア３側の一部とを収納する。図２においては図の煩雑を避けるため、第２コア３の図示が省略される。第２コア３と、少なくとも第１脚１０１、第２脚１０２、第３脚１０３のそれぞれの第２コア３側の一部は、ヒートシンク４によってＸ方向およびＹ方向において囲まれる、ということができる。 In the present embodiment, the heat sink 4 has a recess 400 on the Z direction side, and the recess 400 has a second core 3 and at least the second core 3 side of each of the first leg 101, the second leg 102, and the third leg 103. Store a part of. In FIG. 2, the second core 3 is not shown in order to avoid complication of the drawing. It can be said that the second core 3 and at least a part of the first leg 101, the second leg 102, and the third leg 103 on the second core 3 side are surrounded by the heat sink 4 in the X direction and the Y direction. ..
　プリント基板２はヒートシンク４によってＺ方向において支持される。具体的には凹部４００のＺ方向側の縁である面４０１によってプリント基板２が支持される。かかる支持は、インダクタンス調整用のエアギャップとして機能する第１脚１０１と第１領域３０１との間からコイル２０５を離して配置する観点において望ましい。例えば第２コア３が凹部４００に対して深く配置されるほど、第１脚１０１と第１領域３０１との間からコイル２０５が離れる。 The printed circuit board 2 is supported by the heat sink 4 in the Z direction. Specifically, the printed circuit board 2 is supported by the surface 401, which is the edge of the recess 400 on the Z direction side. Such support is desirable from the viewpoint of arranging the coil 205 away from the first leg 101 and the first region 301 that function as an air gap for adjusting the inductance. For example, the deeper the second core 3 is arranged with respect to the recess 400, the more the coil 205 is separated from the first leg 101 and the first region 301.
　第１面３１１のＸ方向における長さｘ３１１は第１脚１０１のＸ方向における長さｘ１０１よりも長い。第２面３１２のＸ方向における長さｘ３１２は第２脚１０２のＸ方向における長さｘ１０２よりも長い。第３面３１３のＸ方向における長さｘ３１３は第３脚１０３のＸ方向における長さｘ１０３よりも長い。 The length x311 of the first surface 311 in the X direction is longer than the length x101 of the first leg 101 in the X direction. The length x312 of the second surface 312 in the X direction is longer than the length x102 of the second leg 102 in the X direction. The length x313 of the third surface 313 in the X direction is longer than the length x103 of the third leg 103 in the X direction.
　このように長さｘ１０１，ｘ１０２，ｘ１０３，ｘ３１１，ｘ３１２，ｘ３１３同士における関係により、第１コア１と第２コア３とがＸ方向に沿ってずれても、そのずれ量が顕著でない限り、第１領域３０１は第１面３１１に収まり、第２領域３０２は第２面３１２に収まり、第３領域３０３は第３面３１３に収まる。よって距離ｚ１，ｚ２，ｚ３が維持される。 As described above, even if the first core 1 and the second core 3 are displaced along the X direction due to the relationship between the lengths x101, x102, x103, x311 and x312, x313, the deviation amount is not remarkable. The first region 301 fits on the first surface 311, the second region 302 fits on the second surface 312, and the third region 303 fits on the third surface 313. Therefore, the distances z1, z2, and z3 are maintained.
　このようなずれが生じても、漏れインダクタンスも含め、インダクタ６のインダクタンスは維持される。第１コア１の位置と第２コア３の位置とがずれても磁気コア５を利用するインダクタ６のインダクタンスは変動しにくい。 Even if such a deviation occurs, the inductance of the inductor 6 including the leakage inductance is maintained. Even if the position of the first core 1 and the position of the second core 3 deviate from each other, the inductance of the inductor 6 using the magnetic core 5 is unlikely to fluctuate.
　以下、ずれ量と長さｘ１０１，ｘ１０２，ｘ１０３，ｘ３１１，ｘ３１２，ｘ３１３との関係がより詳細に説明される。 Hereinafter, the relationship between the amount of deviation and the lengths x101, x102, x103, x311, x312, x313 will be described in more detail.
　以下では面４０１に対してプリント基板２が固定される場合が例示される。このような固定は、周知の技術、例えばヒートシンク４の一部とプリント基板２の一部とが噛み合うことによって実現できる。 In the following, the case where the printed circuit board 2 is fixed to the surface 401 is illustrated. Such fixing can be realized by a well-known technique, for example, a part of the heat sink 4 and a part of the printed circuit board 2 mesh with each other.
　第２コア３がヒートシンク４に対してＸ方向に移動できる量は、第２コア３が凹部４００に囲まれていることに鑑みて、第２面３１２側において距離ｘ４３２であり、第３面３１３側において距離ｘ４３３である。よって第２コア３はヒートシンク４においてＸ方向に最大値Δ＝ｘ４３２＋ｘ４３３まで可動である。第２コア３は、ヒートシンク４によってＸ方向における移動可能な長さが最大値Δ以下に制限されると見ることもできる。 The amount that the second core 3 can move in the X direction with respect to the heat sink 4 is a distance x432 on the second surface 312 side in view of the fact that the second core 3 is surrounded by the recess 400, and the third surface 313. The distance x433 on the side. Therefore, the second core 3 is movable in the heat sink 4 up to the maximum value Δ = x432 + x433 in the X direction. It can also be seen that the heat sink 4 limits the movable length of the second core 3 in the X direction to the maximum value Δ or less.
　長さｘ３１１は最大値Δと長さｘ２０１との和よりも長い（ｘ３１１＞ｘ２０１＋Δ）。これにより第２コア３が凹部４００内でＸ方向に沿って最大値Δまでずれても、第１領域３０１は第１面３１１に収まり、第１脚１０１と第２コア３とをＺ方向において隔てる距離ｚ１は維持される。 The length x311 is longer than the sum of the maximum value Δ and the length x201 (x311> x201 + Δ). As a result, even if the second core 3 shifts to the maximum value Δ along the X direction in the recess 400, the first region 301 fits in the first surface 311 and the first leg 101 and the second core 3 are aligned in the Z direction. The separating distance z1 is maintained.
　凹部４００の内面は、Ｘ方向において第３面３１３よりも第２面３１２に近い内面４０２、Ｘ方向において第２面３１２よりも第３面３１３に近い内面４０３を有する。第２孔２０２と内面４０２とは距離ｘ２１２によって隔たり、第３孔２０３と内面４０３とは距離ｘ２１３によって隔たる。距離ｘ２１２はヒートシンク４の内面と第２孔２０２とのＸ方向における隔たりの最小値であるとみることができる。距離ｘ２１３はヒートシンク４の内面と第２孔２０２とのＸ方向における隔たりの最小値であるとみることができる。 The inner surface of the recess 400 has an inner surface 402 that is closer to the second surface 312 than the third surface 313 in the X direction, and an inner surface 403 that is closer to the third surface 313 than the second surface 312 in the X direction. The second hole 202 and the inner surface 402 are separated by a distance x212, and the third hole 203 and the inner surface 403 are separated by a distance x213. The distance x212 can be regarded as the minimum value of the distance between the inner surface of the heat sink 4 and the second hole 202 in the X direction. The distance x213 can be regarded as the minimum value of the distance between the inner surface of the heat sink 4 and the second hole 202 in the X direction.
　第２コア３が凹部４００においてＸ方向に最も進む位置（ｘ４３３＝０）において、第２領域３０２が第２面３１２に収まり、かつ第２脚１０２と第２コア３とをＺ方向において隔てる距離ｚ２が維持されるためには、ｘ２１２＞Δの関係が必要である。第２コア３が凹部４００においてＸ方向に最も退く位置（ｘ４３２＝０）において、第２領域３０２が第２面３１２に収まり、かつ距離ｚ２が維持されるためには、ｘ３１２＞ｘ２０２＋Δの関係が必要である。 At the position where the second core 3 advances most in the X direction (x433 = 0) in the recess 400, the distance that the second region 302 fits in the second surface 312 and separates the second leg 102 and the second core 3 in the Z direction. In order for z2 to be maintained, a relationship of x212> Δ is required. At the position (x432 = 0) where the second core 3 recedes most in the X direction in the recess 400, the relationship of x312> x202 + Δ is required for the second region 302 to fit in the second surface 312 and the distance z2 to be maintained. is necessary.
　第２コア３が凹部４００においてＸ方向に最も進む位置（ｘ４３３＝０）において、第３領域３０３が第３面３１３に収まり、かつ第３脚１０３と第２コア３とをＺ方向において隔てる距離ｚ３が維持されるためには、ｘ２１３＞Δの関係が必要である。第２コア３が凹部４００においてＸ方向に最も退く位置（ｘ４３２＝０）において、第３領域３０３が第３面３１３に収まり、かつ距離ｚ３が維持されるためには、ｘ３１３＞ｘ２０３＋Δの関係が必要である。 At the position where the second core 3 advances most in the X direction (x433 = 0) in the recess 400, the distance that the third region 303 fits in the third surface 313 and separates the third leg 103 and the second core 3 in the Z direction. In order for z3 to be maintained, a relationship of x213> Δ is required. At the position (x432 = 0) where the second core 3 recedes most in the X direction in the recess 400, the relationship of x313> x203 + Δ is required so that the third region 303 fits in the third surface 313 and the distance z3 is maintained. is necessary.
　上述のヒートシンク４およびヒートシンク４に固定されるプリント基板２によって第１コア１および第２コア３のＸ方向における移動可能な長さが制限されることは好ましい。通常、ヒートシンク４は他の構成に対して固定され、第１コア１と第２コア３との位置も固定し易いからである。 It is preferable that the heat sink 4 and the printed circuit board 2 fixed to the heat sink 4 limit the movable lengths of the first core 1 and the second core 3 in the X direction. This is because the heat sink 4 is usually fixed to other configurations, and the positions of the first core 1 and the second core 3 can be easily fixed.
　[付記]
　以下、実施形態における変形例が説明される。コイル２０５の少なくとも一部、例えばそのＹ方向の端部が、Ｚ方向において面４０１と対向することは有利である。上述の様にプリント基板２が面４０１によってＺ方向において支持されるとき、コイル２０５を放熱する効果が高まるからである。 [Additional Notes]
Hereinafter, modifications in the embodiment will be described. It is advantageous that at least a portion of the coil 205, eg, its end in the Y direction, faces the surface 401 in the Z direction. This is because when the printed circuit board 2 is supported by the surface 401 in the Z direction as described above, the effect of dissipating heat from the coil 205 is enhanced.
　コイル２０５が絶縁板２０４の内部に配置されているか、絶縁板２０４から露出しているかに拘わらず、上述の電子素子をプリント基板２に設けることは、上記の電気的接続が容易に得られる観点において有利である。例えば当該電子素子は第１孔２０１と、第２孔２０２と、第３孔２０３との周囲に配置されてもよい。 Regardless of whether the coil 205 is arranged inside the insulating plate 204 or is exposed from the insulating plate 204, providing the above-mentioned electronic element on the printed circuit board 2 is a viewpoint that the above-mentioned electrical connection can be easily obtained. It is advantageous in. For example, the electronic element may be arranged around the first hole 201, the second hole 202, and the third hole 203.
　上記の実施形態においてはＸ方向についてのずれが説明されるが、かかる説明をＹ方向について行うこともできる。図５は装置構成７の断面図である。図５は図２の位置ＢＢにおいてＸ方向とは反対側から見た装置構成７の断面を示す。当該変形においては、第１脚１０１、第２脚１０２、第３脚１０３のＹ方向の位置が全て等しく、第１孔２０１、第２孔２０２、第３孔２０３のＹ方向の位置が全て等しい場合が想定される。 In the above embodiment, the deviation in the X direction is explained, but such an explanation can also be given in the Y direction. FIG. 5 is a cross-sectional view of the device configuration 7. FIG. 5 shows a cross section of the apparatus configuration 7 seen from the side opposite to the X direction at the position BB of FIG. In this modification, the positions of the first leg 101, the second leg 102, and the third leg 103 in the Y direction are all the same, and the positions of the first hole 201, the second hole 202, and the third hole 203 in the Y direction are all the same. A case is assumed.
　第１脚１０１、第２脚１０２、第３脚１０３はいずれもＹ方向に長さｙ１００を有する。第１孔２０１、第２孔２０２、第３孔２０３はいずれもＹ方向に長さｙ２００によって開口する。第２コア３はＹ方向に長さｙ３を有する。 The first leg 101, the second leg 102, and the third leg 103 all have a length y100 in the Y direction. The first hole 201, the second hole 202, and the third hole 203 are all opened in the Y direction by a length y200. The second core 3 has a length y3 in the Y direction.
　凹部４００のＹ方向側の内面４０４は第１孔２０１、第２孔２０２、第３孔２０３に対して距離ｙ２０４の隔たりを有する。凹部４００のＹ方向とは反対側の内面４０５は第１孔２０１、第２孔２０２、第３孔２０３に対して距離ｙ２０５の隔たりを有する。 The inner surface 404 of the recess 400 on the Y direction side has a distance y204 with respect to the first hole 201, the second hole 202, and the third hole 203. The inner surface 405 of the recess 400 on the side opposite to the Y direction has a distance y205 from the first hole 201, the second hole 202, and the third hole 203.
　第２コア３がヒートシンク４においてＹ方向に最大値δまで可動であるとする。このとき、上記実施の形態の説明と同様に考えて、ｙ２００＞ｙ１００，ｙ２０３＞δ，ｙ２０５＞δ、ｙ３＞δ＋ｙ２００であることがわかる。 It is assumed that the second core 3 is movable in the heat sink 4 in the Y direction up to the maximum value δ. At this time, it can be seen that y200> y100, y203> δ, y205> δ, and y3> δ + y200 in the same manner as in the description of the above embodiment.
　なお、上記実施形態及び各変形例において説明された各構成は、相互に矛盾しない限り適宜に組合わせられることができる。 Note that the configurations described in the above-described embodiment and each modification can be appropriately combined as long as they do not conflict with each other.
　１　第１コア
　２　プリント基板
　３　第２コア
　４　ヒートシンク
　５　磁気コア
　６　インダクタ
　７　装置構成
　８　コンバータ
　１１ａ，１１ｂ，２１ａ，２１ｂ，２１ｃ　端子
　１００　ヨーク
　１０１　第１脚
　１０２　第２脚
　１０３　第３脚
　２０１　第１孔
　２０２　第２孔
　２０３　第３孔
　２０４　絶縁板
　２０５　コイル
　２０５ａ　第１層
　２０５ｂ　第２層
　３００，４００　凹部
　３０１　第１領域
　３０２　第２領域
　３０３　第３領域
　３１１　第１面
　３１２　第２面
　３１３　第３面
　４０１　面
　４０２，４０３，４０４，４０５　内面
　ＡＡ，ＢＢ　位置
　Ｃｄ　コンデンサ
　Ｄ１，Ｄ２　ダイオード
　Ｈ１，Ｈ２，Ｌ１，Ｌ２　電源線
　Ｌａ，Ｌｃ　インダクタ
　Ｐ１，Ｐ２　接続点
　Ｑ１，Ｑ２，Ｑ３，Ｑ４，Ｑ１０１，Ｑ１０２　スイッチング素子
　Ｔ　変圧器
　ｘ１０１，ｘ１０２，ｘ１０３，ｘ２０１，ｘ２０２，ｘ２０３，ｘ３１１，ｘ３１２，ｘ３１３，ｙ１００，ｙ２００，ｙ３　長さ
　ｘ２１２，ｘ２１３，ｘ４３２，ｘ４３３，ｙ２０４，ｙ２０５，ｚ１，ｚ２，ｚ３　距離
　Δ，δ　最大値 1 1st core 2 Printed circuit board 3 2nd core 4 Heat sink 5 Magnetic core 6 Inductor 7 Device configuration 8 Converters 11a, 11b, 21a, 21b, 21c terminals 100 York 101 1st leg 102 2nd leg 103 3rd leg 201 1st Hole 202 2nd hole 203 3rd hole 204 Insulating plate 205 Coil 205a 1st layer 205b 2nd layer 300,400 Recessed 301 1st area 302 2nd area 303 3rd area 311 1st surface 312 2nd surface 313 3rd surface 401 Surface 402, 403, 404, 405 Inner surface AA, BB Position Cd Capacitor D1, D2 Diode H1, H2, L1, L2 Power line La, Lc Inductor P1, P2 Connection point Q1, Q2, Q3, Q4, Q101, Q102 Switching Element T Transformer x101, x102, x103, x201, x202, x203, x311, x312, x313, y100, y200, y3 Length x212, x213, x432, x433, y204, y205, z1, z2, z3 Distance Δ, δ Maximum value

Claims (3)

  1. 　第１コアと第２コアとを備え、
    　前記第１コアは、ヨークと、第１脚と、第２脚と、第３脚とを有し、
    　前記第２コアは、第１面と、第２面と、第３面とを有し、
    　前記ヨークは第１方向に沿って延在し、
    　前記第１脚と、前記第２脚と、前記第３脚とのいずれもが、前記第２コアとは反対側において前記ヨークと連結され、
    　前記第１脚と、前記第２脚と、前記第３脚とのそれぞれが、前記第１方向と直交する第２方向に沿って延在し、
    　前記第２脚、前記第１脚、前記第３脚が、前記第１方向に沿ってこの順に並び、
    　前記第１面は前記第１脚と前記第２方向において対向し、
    　前記第２面は前記第２脚と前記第２方向において対向し、
    　前記第３面は前記第３脚と前記第２方向において対向する磁気コアであって、
    　前記第２コアは、前記第１面が前記第２面と前記第３面とのいずれよりも前記第２方向に沿って前記第１コアに対して退く凹部を呈し、
    　前記第１面と前記第１脚とを隔てる第１距離は、前記第２面と前記第２脚とを隔てる第２距離と、前記第３面と前記第３脚とを隔てる第３距離とのいずれよりも大きく、
    　前記第１面の前記第１方向における第１長さは前記第１脚の前記第１方向における第２長さよりも長く、
    　前記第２面の前記第１方向における第３長さは前記第２脚の前記第１方向における第４長さよりも長く、
    　前記第３面の前記第１方向における第５長さは前記第３脚の前記第１方向における第６長さよりも長い、磁気コア。     Equipped with a first core and a second core
    The first core has a yoke, a first leg, a second leg, and a third leg.
    The second core has a first surface, a second surface, and a third surface.
    The yoke extends along the first direction and
    All of the first leg, the second leg, and the third leg are connected to the yoke on the side opposite to the second core.
    Each of the first leg, the second leg, and the third leg extends along a second direction orthogonal to the first direction.
    The second leg, the first leg, and the third leg are arranged in this order along the first direction.
    The first surface faces the first leg in the second direction.
    The second surface faces the second leg in the second direction.
    The third surface is a magnetic core facing the third leg in the second direction.
    The second core exhibits a recess in which the first surface recedes with respect to the first core along the second direction than either of the second surface and the third surface.
    The first distance separating the first surface and the first leg is a second distance separating the second surface and the second leg, and a third distance separating the third surface and the third leg. Larger than any of
    The first length of the first surface in the first direction is longer than the second length of the first leg in the first direction.
    The third length of the second surface in the first direction is longer than the fourth length of the second leg in the first direction.
    A magnetic core in which the fifth length of the third surface in the first direction is longer than the sixth length of the third leg in the first direction.
  2. 　請求項１に記載の磁気コアと、
    　プリント基板と、
    　ヒートシンクと
    を備え、
    　前記プリント基板は、絶縁板と、コイルとを有し、
    　前記絶縁板には第１孔と、第２孔と、第３孔とが開口し、
    　前記第１脚は前記第１孔を貫通し、
    　前記第２脚は前記第２孔を貫通し、
    　前記第３脚は前記第３孔を貫通し、
    　前記コイルは前記第１孔の周りに配置され、前記第１脚に巻回され、
    　前記プリント基板は前記ヒートシンクによって前記第２方向において支持される、インダクタ。     The magnetic core according to claim 1 and
    Printed circuit board and
    Equipped with a heat sink
    The printed circuit board has an insulating plate and a coil, and has an insulating plate and a coil.
    The insulating plate has a first hole, a second hole, and a third hole.
    The first leg penetrates the first hole and
    The second leg penetrates the second hole and
    The third leg penetrates the third hole and
    The coil is placed around the first hole and wound around the first leg.
    An inductor in which the printed circuit board is supported by the heat sink in the second direction.
  3. 　前記プリント基板は前記ヒートシンクに固定され、
    　前記第２コアと、少なくとも前記第１脚、第２脚、第３脚のそれぞれの前記第２コア側の一部とは、前記ヒートシンクによって少なくとも前記第１方向において囲まれ、
    　前記第２コアは、前記ヒートシンクによって前記第１方向における移動可能な長さが最大値以下に制限され、
    　前記第２孔と前記ヒートシンクの内面との前記第１方向における隔たりの最小値は前記最大値よりも大きく、
    　前記第３孔と前記ヒートシンクの前記内面との前記第１方向における隔たりの最小値は前記最大値よりも大きく、
    　前記第１面の前記第１方向における長さは前記第１孔が前記第１方向に沿って開口する長さと前記最大値との和よりも大きく、
    　前記第２面の前記第１方向における長さは前記第２孔が前記第１方向に沿って開口する長さと前記最大値との和よりも大きく、
    　前記第３面の前記第１方向における長さは前記第３孔が前記第１方向に沿って開口する長さと前記最大値との和よりも大きい、請求項２に記載のインダクタ。     The printed circuit board is fixed to the heat sink and
    The second core and at least a part of each of the first leg, the second leg, and the third leg on the second core side are surrounded by the heat sink in at least the first direction.
    The heat sink limits the movable length of the second core in the first direction to a maximum value or less.
    The minimum value of the distance between the second hole and the inner surface of the heat sink in the first direction is larger than the maximum value.
    The minimum value of the distance between the third hole and the inner surface of the heat sink in the first direction is larger than the maximum value.
    The length of the first surface in the first direction is larger than the sum of the length at which the first hole opens along the first direction and the maximum value.
    The length of the second surface in the first direction is larger than the sum of the length at which the second hole opens along the first direction and the maximum value.
    The inductor according to claim 2, wherein the length of the third surface in the first direction is larger than the sum of the length of the third hole opening along the first direction and the maximum value.
PCT/JP2020/032073 2019-09-27 2020-08-25 Magnetic core, inductor WO2021059829A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950683U (en) * 1982-09-28 1984-04-03 内山　圭一 Tire chain mounting bracket
JPH02138712A (en) * 1988-11-18 1990-05-28 Matsushita Electric Ind Co Ltd Transformer
JPH07297044A (en) * 1994-04-26 1995-11-10 Sanken Electric Co Ltd Core for coil device
JP2015082622A (en) * 2013-10-24 2015-04-27 オムロンオートモーティブエレクトロニクス株式会社 Printed circuit board with integrated coil, and magnetic device
WO2017126357A1 (en) * 2016-01-21 2017-07-27 三菱電機株式会社 Circuit device and electric power converter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5950683U (en) * 1982-09-28 1984-04-03 内山　圭一 Tire chain mounting bracket
JPH02138712A (en) * 1988-11-18 1990-05-28 Matsushita Electric Ind Co Ltd Transformer
JPH07297044A (en) * 1994-04-26 1995-11-10 Sanken Electric Co Ltd Core for coil device
JP2015082622A (en) * 2013-10-24 2015-04-27 オムロンオートモーティブエレクトロニクス株式会社 Printed circuit board with integrated coil, and magnetic device
WO2017126357A1 (en) * 2016-01-21 2017-07-27 三菱電機株式会社 Circuit device and electric power converter

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