JP2012231069A - Reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress vibration propagation from a magnetic gap to a cooler when cooling a reactor having a pair of J-shaped iron cores.SOLUTION: A reactor 10 includes a reactor core 12 of an annular shape by the disposition of the J-shaped iron cores to face each other, and a pair of coils 50, 52 disposed on the reactor core 12. In regard to four retention stays provided on four corners of the reactor 10, the rigidity of a retention stay 64 near a first gap 40 and a retention stay 62 near a second gap 42 is set smaller than the rigidity of a retention stay 60 far from a first gap 40 and a retention stay 66 far from a second gap 42. On the common cooling surface 82 side of the pair of coils 50, 52, which is disposed in a manner to contact to the cooler 80, the retention stay 60 far from the first gap 40 and the retention stay 66 far from the second gap 42 are disposed.

Description

  The present invention relates to a reactor, and more particularly, to a reactor using a pair of iron cores each having two legs having different lengths.

  As the reactor used in the booster circuit of the power supply device, a reactor in which a coil is wound around a reactor core formed in an annular shape can be used.

  For example, in Patent Document 1, a conventional reactor uses a pair of U-shaped iron cores, and the leg portions of the pair of iron cores are arranged so that the bobbins of the pair of coils overlap with each other in the space between the opposing end surfaces. However, it is pointed out that due to the bobbin overlap of the coil, the legs of the iron core cannot be made thick, the copper loss is large and the temperature rise is large. Thus, it is disclosed that the bobbins of a pair of coils are not arranged in an overlapping manner and a pair of J-shaped iron cores are used. Here, the J-shaped iron core is an iron core having two legs of different lengths, and by arranging the same-shaped J-shaped iron cores so that their end faces face each other, an annular shaped reactor Can be formed.

  Patent Document 2 discloses a reactor as an electromagnetic device that includes a middle leg core having a columnar shape, a coil provided around the middle leg core, and an outer peripheral surface of the coil except for a part thereof, and is open to one side. A structure including a shape core, and an upper lid core and a lower lid core covering the upper and lower ends thereof is disclosed. Here, the cooling member is arranged close to a part of the outer peripheral surface of the coil located on the opening side of the U-shaped core.

  In Patent Document 3, as a reactor, a coil, a magnetic powder mixed resin core filled inside and outside the coil, a case for housing these, a cooling refrigerant introduction pipe embedded in the core, and a refrigerant discharge are disclosed. A configuration having a tube is disclosed. Here, the refrigerant flows through the refrigerant introduction pipe and the refrigerant discharge pipe, and heat exchange is performed between the reactor and the refrigerant.

  In Patent Document 4, as a reactor mounting structure, a core having opposing coil winding portions and formed in a closed loop shape, a coil formed in the coil winding portion, and a core formed with a coil are disclosed. A non-magnetic ceramic connection that connects the base and the holding plate with the base arranged below, the holding plate arranged above the core on which the coil is formed, and the core on which the coil is formed interposed therebetween. And having a bolt. Here, the connecting bolt is disposed in the gap between the core and the coil inside the closed loop of the core.

  In Patent Document 5, as a water-cooled cooler in a transformer of an electric vehicle, an annular iron core around which a coil is wound is placed vertically, and a plurality of cooling water passages extending in the length direction are respectively disposed on the upper and lower portions thereof. A configuration is described in which a flat tube of a hollow extruded profile is disposed, and cooling water is circulated through a plurality of cooling water passages to cool the annular iron core.

  In Patent Document 6, as a reactor fixing structure, a core body including an annular structure including a plurality of block cores arranged with gaps, and a leaf spring connected to the core body and attaching the core body to an external structure are disclosed. It is disclosed that a flat plate is bent into an L shape and includes a leaf spring whose rigidity varies depending on the direction. Here, since vibration is greatest in the arrangement direction of the block cores, it is described that the vibration generated in the core body is attenuated by inclining the leaf springs in the direction of low rigidity and the arrangement direction of the block cores.

Utility Model Registration No. 3096267 Specification JP 2009-260014 A JP 2007-335833 A JP 2009-188033 A JP 7-192933 A JP 2009-26952 A

  In consideration of attaching and holding the reactor outside, when using the J-shaped iron core of Patent Document 1, the position of the magnetic gap as the vibration source is not equidistant when viewed from the four corners of the reactor. Therefore, depending on the arrangement of the holding portion, it is likely that the biased vibration is easily propagated to the outside. In particular, when the reactor is brought into contact with the cooler for cooling, the vibration may be propagated to the cooler.

  As described above, the reactor using the pair of J-shaped iron cores still has a problem. An object of the present invention is to provide a reactor that can suppress vibration propagation from a magnetic gap to a cooler using a pair of J-shaped iron cores.

  The reactor according to the present invention includes a pair of iron cores each having two legs having different lengths, and the longer leg of the two legs of the iron core on one side and the two legs of the iron core on the other side. The shorter leg is made to face the first gap, and the shorter leg of the two legs of the iron core on one side and the longer of the two legs of the iron core on the other side Reactors that form leg shapes and combine the facing gap as a second gap portion to form an annular shape, a first coil wound around the first gap portion in the annular shape of the reactor case, A pair of coil portions of a second coil wound around the two gap portions, and four holding stay portions provided at four corners of the reactor for attaching the reactor to the outside, Close holding stay and second gap A holding stay portion that is far from the first gap portion and four holding stay portions that are smaller than the rigidity of the holding stay portion that is far from the second gap portion, and the outer peripheral surface of the first coil A holding stay portion that is far from the first gap portion on the cooling surface side when the reactor is attached to the outside with the surface parallel to the surface forming the annular shape of the reactor core among the outer peripheral surfaces of the second coil as a common cooling surface And a holding stay portion far from the second gap portion.

  Further, in the reactor according to the present invention, when being attached to the outside, the reactor core is arranged with a surface forming an annular shape as a surface along the vertical direction, and the cooling surfaces of the pair of coils are surfaces along the vertical direction The holding stay portion has a height position along the vertical direction of the holding stay portion far from the first gap portion, and a height position along the vertical direction of the holding stay portion far from the second gap portion. The height position along the vertical direction of the holding stay portion having different height positions and close to the first gap portion is different from the height position along the vertical direction of the holding stay portion close to the second gap portion. It is preferable to have a position.

  Further, in the reactor according to the present invention, the plate thickness of the holding stay portion close to the first gap portion and the holding stay portion close to the second gap portion is held far from the holding stay portion and the second gap portion far from the first gap portion. It is preferable that the thickness is smaller than the plate thickness of the stay portion.

  Further, in the reactor according to the present invention, the pair of coils are arranged in the reactor core with the first coil and the second coil shifted in the axial direction so as not to overlap each other along the axial direction. Is preferred.

  With the above configuration, the reactor uses a reactor core that has an annular shape by making J-shaped iron cores having two legs of different lengths face each other. For the four holding stay portions provided at the four corners of the reactor to attach the reactor to the outside, the rigidity of the holding stay portion close to the first gap portion and the holding stay portion close to the second gap portion is A holding stay portion having a higher rigidity than that of the holding stay portion far from the first gap portion and the holding stay portion far from the second gap portion is disposed on the cooling surface side. As described above, the reactor is attached to the cooling surface side using the holding stay portion disposed at a position far from the magnetic gap serving as the vibration source. This can suppress propagation of vibration to the cooler.

  In addition, when the reactor is attached to the outside, when the surface forming the annular shape is arranged as a surface along the vertical direction, the reactor core is arranged so that the height of the holding stay portion far from the first gap portion is high. The height position has a height position different from the height position along the vertical direction of the holding stay portion far from the second gap portion, and the height position along the vertical direction of the holding stay portion close to the first gap portion is The holding stay portion close to the second gap portion has a height position different from the height position along the vertical direction. In this way, by changing the height of the holding stay portion, the reactor can be attached to the cooling surface side so as to be disposed at a position far from the magnetic gap serving as the vibration source.

  Further, in the reactor, the plate thicknesses of the holding stay portion near the first gap portion and the holding stay portion near the second gap portion are the plates of the holding stay portion far from the first gap portion and the holding stay portion far from the second gap portion. Since the thickness is smaller than the thickness, vibration propagation to the cooler can be effectively suppressed.

  Further, in the reactor, the pair of coils are arranged on the reactor core with the axial position shifted so that the first coil and the second coil do not overlap each other along the axial direction. Thereby, the dimension of the reactor along the radial direction of the coil can be reduced.

It is the front view, top view, left view, and right view which show the structure of the reactor of embodiment which concerns on this invention. It is a reactor apparatus with a cooling device using the reactor of embodiment which concerns on this invention. It is an exploded view of a reactor device with a cooler using a reactor of an embodiment concerning the present invention. It is a figure explaining the structure of the reactor of another structure. It is a figure explaining the combination of the reactor core and coil of another structure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Below, although the reactor used for the power supply device for vehicles and a reactor device are demonstrated, the power supply device for uses other than the object for vehicles may be sufficient. In addition, as a J-shaped iron core that is a reactor core, one iron core material will be described as having a shape bent in a J-shape, but this may be a combination of a plurality of core materials to form a J-shape. Good. For example, three linear I cores may be combined to form a J shape, or one of two leg portions of one U-shaped core may be combined with an I core to form a J shape.

  Although the J-shaped iron core will be described as a dust core formed by magnetic powder, the magnetic steel sheet may be punched into a predetermined shape. Moreover, although the case holding a reactor is demonstrated as a power supply device case, the reactor case which accommodates a reactor may be sufficient. The materials, dimensions, and shapes described below are merely examples for explanation, and can be appropriately changed according to the application.

  Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is a front view, a top view, a left side view, and a right side view of the reactor 10. Here, although it is not a component of the reactor 10, in order to demonstrate the cooling surface 82 of the reactor 10, the cooler 80 is shown in figure. In the following description, a coil that is wound around an iron core and has a holding part that is attached to the case is referred to as a reactor, and a reactor that is attached to a case or the like using the holding part is referred to as a reactor device. In FIG. 1, XYZ directions orthogonal to each other are shown so that the correspondence between the drawings can be understood. Here, the Z direction is the vertical direction, and the XY plane is a plane parallel to the surface of the reactor 10 where the reactor core 12 forms an annular shape. In the following figures, the XYZ directions are shown as necessary.

  Reactor 10 is used in a booster circuit of a vehicle power supply device mounted on a hybrid vehicle, an electric vehicle, or the like, and is disposed in a case of the power supply device via a holding portion.

  The reactor 10 includes a reactor core 12, a mold portion 14 that covers the reactor core 12 with a resin, a pair of coils 50 and 52 wound around the outer periphery of the mold portion, and four holdings protruding from four corners of the mold portion 14. The stay portions 60, 62, 64, and 66 are included.

  The reactor core 12 is a magnetic body formed by combining a pair of iron cores 20 and 30 into an annular shape. Each of the pair of iron cores 20 and 30 has two leg portions having different lengths, and has a J-shape in a planar shape. In FIG. 1, these two iron cores 20 and 30 are shown as T1 and T2 in order to distinguish them. As the iron cores 20 and 30, powder magnetic cores formed by forming magnetic powder into a J shape are used.

  T1 is an iron core 20 on one side, and the iron core 20 on one side has a longer leg part 22, a shorter leg part 24, and a trunk part 21 connecting them. With T2 as the other iron core 30, the other iron core 30 has a longer leg 32, a shorter leg 34, and a trunk 31 connecting them. Regarding the iron core 20 on one side and the iron core 30 on the other side, the lengths of the trunk portions 21 and 31 are the same, the lengths of the longer leg portions 22 and 32 are the same, and the shorter leg portions 24 and 34. Are the same length. That is, the iron core 20 on one side and the iron core 30 on the other side have the same outer shape.

  Reactor core 12 has long leg portion 22 of iron core 20 on one side and short leg portion 34 of iron core 30 on the other side facing each other, short leg portion 24 of iron core 20 on one side, The longer leg portion 32 of the iron core 30 on the other side is opposed to each other to form an annular shape. Here, a gap in which the longer leg portion 22 of the iron core 20 on one side and the shorter leg portion 34 of the iron core 30 on the other side face each other is defined as a first gap portion 40, and the shorter one of the iron core 20 on the one side. In FIG. 1, the first gap portion 40 is G1 and the second gap portion 42 is G2 in a gap where the leg portion 24 of the other side and the longer leg portion 32 of the iron core 30 on the other side face each other. Is shown as An appropriate nonmagnetic material is inserted into the first gap portion 40 and the second gap portion 42 to form a magnetic gap in the reactor core 12.

  The mold portion 14 includes an iron core mold on one side that covers the entire surface with a resin while exposing an end surface facing the first gap portion 40 of the iron core 20 on one side and an end surface facing the second gap portion 42, and an iron core 30 on the other side. These are two general terms for the other side iron core mold that covers the whole with resin while exposing the end face facing the first gap part 40 and the end face facing the second gap part 42. In other words, both the iron core 20 on one side and the iron core 30 on the other side are molded with a resin except for a magnetic gap. As the resin of the mold part 14, an appropriate plastic resin having heat resistance and electrical insulation can be used.

  The pair of coils 50 and 52 are configured by a first coil 50 wound around the first gap portion 40 and a second coil 52 wound around the second gap portion 42 in the annular shape of the reactor core 12. Is done. The first coil 50 and the second coil 52 are obtained by winding an insulated lead wire on a suitable bobbin with a predetermined number of turns, and are connected in series with each other, and are equivalently wound with the reactor core 12 as an iron core. One coil. The first coil 50 and the second coil 52 have the same number of turns.

  Here, the first coil 50 is disposed so as to cover the first gap portion 40, and the second coil 52 is disposed so as to cover the second gap portion 42. And the axially outer peripheral portion of the second coil 52 are disposed so as to overlap each other along the axial direction. In addition, the meaning of the structure which mutually overlaps along an axial direction is later mentioned using FIG.

  The holding stay portions 60, 62, 64, 66 are four holding portions that protrude from the four corners of the mold portion 14 in order to attach and hold the reactor 10 to an external case. As the holding stay portions 60, 62, 64, 66, a suitable metal plate having one end embedded in the mold portion 14 and the other end exposed from the mold portion 14 can be used.

  Here, in order to distinguish the four holding stay portions 60, 62, 64, 66, they are shown as S11, S12, S21, S22 in FIG. S 11 is a holding stay portion 60 provided on the first gap portion 40 side of the iron core 20 on one side of the reactor core 12. This is called the 11th stay. S11 has an eleventh meaning. Similarly, S12 is a holding stay portion 62 provided on the second gap portion 42 side of the iron core 20 on one side, and this is called a twelfth stay. S21 is a holding stay portion 64 provided on the first gap portion 40 side of the other iron core 30, and this is referred to as a 21st stay. S22 is a holding stay portion 66 provided on the second gap portion 42 side of the other iron core 30, and this is referred to as a 22nd stay.

  Here, the plate thickness of the holding stay portion 64 that is S21 close to the first gap portion 40 and the plate thickness of the holding stay portion 62 that is S12 close to the second gap portion 42 are S11 far from the first gap portion 40. It is thinner than the plate thickness of a certain holding stay portion 60 and the plate thickness of the holding stay portion 66 which is S22 close to the second gap portion. The side view of FIG. 1 shows that the thickness of the holding stay portion 62 that is S12 is thinner than the thickness of the holding stay portion 66 that is S22.

  That is, the rigidity of the holding stay parts 62 and 64 close to the magnetic gap part is set to be smaller than that of the holding stay parts 60 and 66 far from the magnetic gap part. In order to reduce the rigidity, in addition to thinning the plate thickness as described above, it is possible to make the shape easy to bend. For example, the width of the root portion in the mold portion 14 of the holding stay portions 62 and 64 may be narrower than the width of the root portion in the mold portion 14 of the holding stay portions 62 and 64.

  A state in which the reactor 10 having the above-described configuration is attached so as to be cooled using the cooler 80 will be described with reference to FIGS. 2 and 3. As shown in FIG. 1, the surface parallel to the surface forming the annular shape of the reactor core 12 among the outer peripheral surface of the first coil 50 and the outer peripheral surface of the second coil 52 is a common cooling surface 82. Used as The cooler 80 is disposed so as to contact the common cooling surface 82.

  FIG. 2 is a perspective view of the reactor device 100 with the cooler in which the reactor 10 is attached to the case 90 so that the cooler 80 contacts the common cooling surface 82 as viewed from the front. FIG. 3 is an exploded perspective view of FIG.

  The case 90 includes a base 78 and four holding pillars 70, 72, 74, 76 that extend vertically on the base 78. The four holding columns 70, 72, 74, 76 are mounting members used when the reactor 10 is mounted and disposed with the surface forming the annular shape of the reactor core 12 being a surface along the vertical direction.

  That is, the reactor 10 is attached to the case 90 with the surface forming the annular shape of the reactor core 12 as the XZ plane. At that time, the holding pillars 70, 72, 74, and 76 are members for attaching the four holding stay portions 60, 62, 64, and 66 of the reactor 10, respectively. That is, the holding stay portion 60 is attached to the top surface of the holding column 70, the holding stay portion 62 is attached to the top surface of the holding column 72, the holding stay portion 64 is attached to the top surface of the holding column 74, and the holding column 76. A holding stay portion 66 is attached to the top surface of.

  The cooler 80 is positioned and arranged with respect to the case 90 so that one surface thereof contacts the common cooling surface 82 of the pair of coils 50 and 52. In this case, the cooling surface 82 is a surface parallel to the XZ surface, so that one surface of the cooler 80 is parallel to the XZ surface so that the one surface contacts the cooling surface 82 of the reactor 10. In addition, a cooler 80 is arranged. In FIG. 2 and FIG. 3, the illustration of the arrangement member of the cooler 80 is omitted. The arrangement member of the cooler 80 and the case 90 may be integrated.

  When the reactor 10 is arranged as shown in FIG. 3 with the surface forming the annular shape of the reactor core 12 as the XZ plane, the arrangement of the four holding stay portions 60, 62, 64, 66 is as follows. That is, the holding stay portion 60 far from the first gap portion 40 and the holding stay portion 66 far from the second gap portion 42 are disposed on the cooling surface 82 side. A holding stay portion 64 close to the first gap portion 40 and a holding stay portion 62 close to the second gap portion 42 are disposed on the front side opposite to the cooling surface 82.

  Further, the height positions that are positions along the Z direction of the four holding stay portions 60, 62, 64, and 66 are as follows. That is, the height position along the vertical direction of the holding stay portion 60 far from the first gap portion 40 is different from the height position along the vertical direction of the holding stay portion 66 far from the second gap portion 42. Have. Further, the height position along the vertical direction of the holding stay portion 64 close to the first gap portion 40 is different from the height position along the vertical direction of the holding stay portion 62 close to the second gap portion 42. Have. The height positions along the vertical direction of the four holding pillars 70, 72, 74, 76 are set in accordance with the respective height positions.

  In this way, the height positions of the holding columns 70, 72, 74, and 76 are set so that the holding stay portions 60, 62, 64, and 66 can be attached, and the holding columns 70 and 76 are arranged on the cooling surface 82 side. To do. Accordingly, the reactor 10 can be attached to the cooling surface 82 side using the holding stay portions 60 and 66 far from the first gap portion 40 and the second gap portion 42. Accordingly, it is possible to suppress the vibration from the first gap part 40 and the second gap part 42 serving as the vibration source from propagating to the cooler 80.

  As described above, the rigidity of the holding stay parts 60 and 66 is larger than the rigidity of the holding stay parts 62 and 64. Specifically, as shown in FIGS. 1 to 3, the plate thickness of the holding stay portions 60 and 66 is thicker than the plate thickness of the holding stay portions 62 and 64. Thereby, it can suppress more effectively that the vibration from the 1st gap part 40 and the 2nd gap part 42 propagates to the cooler 80. FIG.

  In the above, as a method of arranging the reactor 10, the surface forming the annular shape of the reactor core 12 is a surface along the vertical direction. Specifically, as shown in FIG. 1, the surface forming the annular shape is an XZ plane, and at that time, the surfaces of the first gap portion 40 and the second gap portion 42 are parallel to the XY plane. .

  Another arrangement in which the surface forming the annular shape is the XZ plane is a method in which the surfaces of the first gap portion 40 and the second gap portion 42 are parallel to the YZ plane. FIG. 4 is a diagram showing the arrangement of such a reactor 11. The reactor 11 corresponds to a reactor having an arrangement in which the reactor core 12 in which the pair of coils 50 and 52 are arranged is rotated 90 degrees in the XZ plane with respect to the arrangement in FIG.

  Also in the reactor 11, a holding stay portion 60 far from the first gap portion 40 and a holding stay portion 66 far from the second gap portion 42 are disposed on the cooling surface 82 side. A holding stay portion 64 close to the first gap portion 40 and a holding stay portion 62 close to the second gap portion 42 are disposed on the front side opposite to the cooling surface 82. With such an arrangement, the operations and effects described in relation to FIGS. 1 to 3 are similarly exhibited.

  In the above description, the arrangement of the two coils 50 and 52 in the reactor core 12 has been described as having the same position along the axial direction and, in that sense, overlapping each other along the axial direction. When using a J-shaped core, the configuration of FIG. 5 can be used. In FIG. 5, the positions of the two coils 51 and 53 in the reactor core 13 are shifted in the axial direction so that they do not overlap with each other along the axial direction.

  Comparing the configuration of FIG. 1 with the configuration of FIG. 5, the configuration of FIG. 1 has a dimension in the Z direction that is perpendicular to the surfaces of the first gap portion 41 and the second gap portion 43 compared to the configuration of FIG. Can be small. If the Z direction is the height direction, the configuration of FIG. 1 can reduce the height of the reactor core and the reactor as compared to the configuration of FIG.

  On the other hand, in the configuration of FIG. 5, the dimension in the X direction that is the direction in which the surfaces of the first gap portion 41 and the second gap portion 43 extend or the radial direction of the coils 51 and 53 can be reduced. If the X direction is the width direction, the configuration of FIG. 5 can reduce the width of the reactor core and the reactor as compared to the configuration of FIG.

  When the reactor is placed in a power supply device or the like, use the configuration shown in FIG. 1 that can reduce the height of the reactor when there are restrictions in the height direction under the placement conditions including other components. Can do. When the width direction is restricted under the arrangement conditions of the power supply device or the like, the configuration of FIG. 5 that can reduce the width of the reactor can be used.

  The reactor which concerns on this invention can be utilized for a power supply device.

  10, 11 Reactor, 12, 13 Reactor core, 14 Mold part, 20, 30 Iron core, 21, 31 Body part, 22, 24, 32, 34 Leg part, 40, 41 First gap part, 42, 43 Second gap Part, 50, 51, 52, 53 coil, 60, 62, 64, 66 holding stay part, 70, 72, 74, 76 holding column, 78 base, 80 cooler, 82 cooling surface, 90 case, 100 reactor device.

Claims (4)

For a pair of iron cores each having two legs of different lengths, the longer leg of the two legs of the iron core on one side and the shorter leg of the two legs of the iron core on the other side The opposing gap is defined as the first gap part, and the shorter leg part of the two leg parts of the iron core on one side is opposed to the longer leg part of the two leg parts of the iron core on the other side. Reactors that combine the opposing gap as the second gap portion to form an annular shape;
In the annular shape of the reactor core, a first coil wound around the first gap portion, and a pair of coil portions wound around the second gap portion,
Four holding stays provided at the four corners of the reactor for attaching the reactor to the outside,
Four holdings in which the rigidity of the holding stay part near the first gap part and the holding stay part near the second gap part are smaller than the rigidity of the holding stay part far from the first gap part and the holding stay part far from the second gap part. Stay section,
With
When attaching the reactor to the outside with a surface parallel to the surface forming the annular shape of the reactor core among the outer peripheral surface of the first coil and the outer peripheral surface of the second coil as a common cooling surface,
A reactor characterized in that a holding stay portion far from the first gap portion and a holding stay portion far from the second gap portion are arranged on the cooling surface side. In the reactor according to claim 1, when attached to the outside,
The rear anchor is arranged with the surface forming the annular shape as a surface along the vertical direction,
The cooling surfaces of the pair of coils are arranged in parallel to the surface along the vertical direction,
The holding stay section
The height position along the vertical direction of the holding stay portion far from the first gap portion has a height position different from the height position along the vertical direction of the holding stay portion far from the second gap portion,
The height position along the vertical direction of the holding stay portion close to the first gap portion has a height position different from the height position along the vertical direction of the holding stay portion close to the second gap portion. Reactor. The reactor according to claim 2,
The plate thickness of the holding stay portion close to the first gap portion and the holding stay portion close to the second gap portion is thinner than the plate thickness of the holding stay portion far from the first gap portion and the holding stay portion far from the second gap portion. Reactor characterized by. The reactor according to claim 3,
A pair of coils
A reactor in which a first coil and a second coil are arranged in a reactor core while being shifted in an axial direction so as not to overlap each other along the axial direction.

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