JP2016066686A - Reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor capable of preventing an insulation coating of a coil from being damaged in production and preventing the insulation coating of the coil from being damaged by vibration of the coil and such during operation.SOLUTION: A reactor 1 includes: a coil 2, formed by spirally winding a coil wire; a magnetic core 3 having a part disposed in the coil; and an insulation compact 4 having ctenidia 4c, interposed between coil turns, and support parts 41, 42, for supporting the ctenidia. A thickness of a part of each of the ctenidia interposed between the coil turns is smaller than an interval between the coil turns in a free length of the coil.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a reactor that is used in a vehicle-mounted DC-DC converter or a component of a power conversion device mounted on an electric vehicle such as a hybrid vehicle. In particular, the present invention relates to a reactor that can prevent damage to the insulating coating of the coil at the time of manufacture and can prevent damage to the insulating coating of the coil due to vibration of the coil during operation.

  A reactor is one of the parts of a circuit that performs a voltage step-up operation or a voltage step-down operation. In Patent Document 1, a cylindrical coil formed by spirally winding a covered winding including an insulating coating, an annular magnetic core on which the coil is disposed, and a combination of the coil and the magnetic core are housed. A reactor including a case and a sealing resin that fills the case and seals the braid is disclosed. The entire assembly of the reactor is fixed to the case by a sealing resin.

JP 2012-253384 A JP 2005-294427 A

  When a sealing resin is provided as in the reactor described in Patent Document 1, a case in which the sealing resin is filled is also essential, so that the reactor including the case tends to be large. Since it is desired that the installation space is small for in-vehicle applications, it is desirable to omit the sealing resin and the case filled with the sealing resin in consideration of further miniaturization of the reactor. Further, during operation of the reactor, the coil generates heat and the temperature rises, so it is desirable to cool it. For example, although heat dissipation can be improved by performing forced cooling with a liquid refrigerant, the liquid refrigerant does not directly contact the coil when the coil is covered with a sealing resin. It is conceivable to omit the sealing resin from the viewpoint of improving the heat dissipation. However, if the sealing resin is omitted, the coil cannot be fixed by the sealing resin, and the coil may move such that the coil expands and contracts in the axial direction due to vibration during operation. As a result of the movement of the coil, the turns of the coil may rub or collide with each other, and there is a risk of damaging the insulation coating of the winding constituting the coil.

  Therefore, it is conceivable to arrange a comb-like spacer between the turns of the coil. For example, Patent Document 2 discloses that a comb-shaped spacer is inserted into a gap (between turns) on a coil surface of a coil to ensure a predetermined interval between turns and to ensure a withstand voltage of the coil. ing. However, in the spacer of Patent Document 2, since the spaces between the turns are widened by inserting the comb teeth between the turns of the coil, there is a possibility that the insulating coating of the coil is damaged by the comb teeth when the spacer is inserted.

  The present invention has been made in view of the above circumstances, and one of the objects of the present invention is to prevent damage to the coil insulation coating during manufacture, and damage to the coil insulation coating due to vibration of the coil during operation, etc. It is in providing the reactor which can prevent.

  The reactor which concerns on 1 aspect of this invention is a reactor provided with the coil formed by winding a coil | winding helically, and the magnetic core which has a part arrange | positioned in the said coil, Comprising: Between the turns of the said coil And an insulating molded body having a comb tooth and a support portion for supporting the comb tooth. In each of the comb teeth, the thickness of the portion interposed between the coil turns is smaller than the interval between the coil turns in the free length of the coil.

  The reactor can prevent damage to the insulation coating of the coil during manufacture, and can prevent damage to the insulation coating of the coil due to vibration of the coil during operation.

It is a schematic perspective view which shows the reactor of Embodiment 1. FIG. It is a disassembled perspective view which shows the outline of the reactor of Embodiment 1. FIG. It is the elements on larger scale in the model longitudinal section of the reactor of Embodiment 1. FIG. It is the elements on larger scale in the model longitudinal section of the reactor of a test example.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described.

  (1) A reactor according to an embodiment is a reactor including a coil formed by spirally winding a winding, and a magnetic core having a portion disposed in the coil, and is interposed between turns of the coil. And an insulating molded body having a supporting portion for supporting the comb teeth. In each of the comb teeth, the thickness of the portion interposed between the coil turns is smaller than the interval between the coil turns in the free length of the coil.

  According to the above configuration, when the thickness of the portion interposed between the coil turns in the comb teeth is smaller than the interval between the coil turns in the free length of the coil, the comb teeth are inserted between the coil turns. There is no need to spread the turn. Therefore, at the time of manufacturing the reactor, it is possible to prevent the insulating coating of the coil from being damaged by the comb teeth. In addition, since the comb teeth of the insulating molded body are interposed between the turns of the coil, even if the coil moves during the operation of the reactor, the turns of the coil can be prevented from rubbing or colliding with each other. Therefore, it is possible to prevent the coil insulation coating from being damaged even during the operation of the reactor. As mentioned above, even if it does not have sealing resin which covers the outer peripheral surface of a coil, damage to the insulation coating of a coil accompanying the vibration of a coil etc. can be prevented. The reactor of this embodiment is excellent in heat dissipation because the liquid refrigerant is in direct contact with the coil when it is cooled by the liquid refrigerant by omitting the sealing resin.

  (2) As one form of the reactor of embodiment, it is mentioned that the said comb tooth is a taper shape from which thickness becomes small toward the front end side.

  Since the comb teeth are tapered, the comb teeth can be easily inserted between the turns of the coil.

  (3) As one form of the reactor of an embodiment, the coil is an edgewise coil formed by edgewise winding a rectangular winding having a rectangular cross section, and the height of the comb teeth is equal to the rectangular winding. It is mentioned that it is less than 1/2 of the width | variety.

  Since the height of the comb teeth interposed between the turns of the coil is less than ½ of the width of the rectangular winding, damage to the insulation coating of the coil due to the comb teeth can be sufficiently prevented, and the height of the comb teeth Compared with the case where the thickness is the full width of the rectangular winding, the amount of the constituent material of the comb teeth can be reduced.

  (4) As one form of the reactor of embodiment of said (3), the said flat coil | winding is a shape in which cross-sectional shape has the corner | angular R part which rounded off the corner | angular part, the height of the said comb teeth is H, The maximum thickness of the comb teeth on the support portion side is T, the minimum interval among the turns of the coil is S, and the distance between the centers of the rectangular windings constituting adjacent turns in the free length of the coil is D. , Satisfying S <T <D and satisfying T: H = 10: 1 to 1:30.

  Since the cross-sectional shape of the rectangular winding is a shape having a corner R portion with rounded corners, the cross-sectional shape of the gap between the turns of the coil is roughly trapezoidal as described in detail later with reference to FIG. It can be divided into a space 210S and a rectangular space 220S. The trapezoidal space is a space that is sandwiched between corner R portions disposed opposite to each other in adjacent turns, and is a so-called dead space in which a rectangular winding is formed so as to provide the corner R portion. The rectangular space is a space formed by a minimum interval among the intervals between the turns of the coil, being sandwiched between linear portions arranged to face each other between adjacent turns. By forming a trapezoidal space between the turns of the coil, for example, when the comb teeth are tapered, the thickness on the support portion side of the comb teeth compared to the case where the thickness of the comb teeth is uniform Since T can be increased in the range of S <T <D, the strength of the comb teeth can be improved. At this time, when the thickness T on the support portion side of the comb teeth satisfies S <T <D and the height H of the comb teeth satisfies T: H = 10: 1 to 1:30, the insulating coating of the coil It is easy to insert the comb teeth between the turns of the coil. By effectively using the dead space as the insertion space for the comb teeth, the reactor size is not substantially increased.

  (5) As one form of the reactor of embodiment, it is mentioned that the said insulation molding is either a coil cover part or an inside interposition part. A coil cover part is arrange | positioned at the outer peripheral surface of the said coil. The inner interposed portion is interposed between the inner peripheral surface of the coil and the outer peripheral surface of the inner core portion disposed in the coil of the magnetic core.

  The insulating molded body can be disposed on either the outer peripheral surface or the inner peripheral surface of the coil.

  (6) As one form of the reactor of an embodiment, it is arranged between the inner peripheral surface of the coil and the outer peripheral surface of the inner core part arranged in the coil in the magnetic core, and presses the coil, It is mentioned that a coil fixing part that restricts the movement of the coil is provided.

  By restricting the movement of the coil by pressing the coil with the coil fixing part, the coil is axially and radially with respect to the inner core part due to the vibration of the coil and magnetic core during the operation of the reactor or the influence of the external environment. It is possible to regulate movement in the direction and circumferential direction. Since the movement of the coil is restricted, it is possible to prevent the magnetic core from being damaged due to the vibration of the coil and the noise in addition to the above-described damage to the insulating coating of the coil.

  (7) As one form of the reactor of embodiment, it is mentioned that the said comb tooth is comprised by any one of a thermosetting resin, a thermoplastic resin, and ceramics.

  An appropriate resin or the like can be used as a constituent material of the comb teeth.

[Details of the embodiment of the present invention]
Details of the embodiment of the present invention will be described below. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included. The same code | symbol in a figure shows the same name thing.

<Embodiment 1>
With reference to FIGS. 1-3, the reactor 1 of Embodiment 1 is demonstrated. FIG. 1 shows a state in which a part of one (near side) insulating molded body (coil cover part) 4 and a winding part 2b (coil 2) is cut out.

[Reactor]
Overall Configuration The reactor 1 includes a coil 2 formed by winding a winding 2w in a spiral shape, a magnetic core 3 disposed inside and outside the coil 2 to form a closed magnetic path, and a comb interposed between the turns of the coil 2 And an insulating molded body 4 having teeth 4c. The reactor 1 of the first embodiment is characterized in that each of the comb teeth 4c has a thickness of a portion interposed between the turns of the coil 2 smaller than an interval between the turns of the coil 2 in the free length of the coil 2. One. Hereinafter, each configuration will be described in detail.

The coil 2 includes a pair of cylindrical winding portions 2a and 2b formed by spirally winding a single continuous winding 2w as shown in FIGS. 1 and 2, and a winding 2w. And a connecting portion 2r that is formed from a part and connects the two winding portions 2a and 2b. Each winding part 2a, 2b is arranged in parallel (side by side) so that each axial direction is parallel. The winding 2w is a covered rectangular winding (so-called enameled wire) including a rectangular conductor (copper or the like) and an insulating coating (polyamideimide or the like) covering the outer periphery of the conductor, and the winding portions 2a and 2b are It is an edgewise coil. This coated rectangular winding has rounded corners, and the cross-sectional shape has a corner R portion 210 with rounded corners (see FIG. 3). Both end portions of the winding 2w are drawn out from the winding portions 2a and 2b in appropriate directions, and the terminal members 8a and 8b are connected to the conductor portions at the ends thereof. The coil 2 is electrically connected to an external device (not shown) such as a power source via the terminal members 8a and 8b.

-Insulation molded object The insulating molded object 4 has the comb-tooth 4c interposed between the turns of the coil 2, and the support part which supports the comb-tooth 4c. By interposing the comb teeth 4 c between the turns of the coil 2, it is possible to prevent adjacent turns from rubbing or colliding with each other and to prevent damage to the insulating coating of the coil 2. In the present embodiment, the insulating molded body 4 is provided on a member (coil cover portion) disposed on the outer peripheral surface of each of the winding portions 2a and 2b. Hereinafter, the structure of the characteristic part of this embodiment of the coil cover part (insulation molded body) 4 and related parts will be described, and then the other structure will be described.

.. Configuration of main characteristic portion and related portion As shown in FIG. 2, the coil cover portion 4 has a shape in which a plate material having two through holes is bent into an L shape at a position between both through holes, In other words, it is a member shaped like two frame-shaped members joined together in an L shape. The open portion of the L-shape functions as a fitting slit used when fitting the coil cover portion 4 into the winding portions 2a and 2b. The L-shaped bent portion (bent portion 40) in the coil cover portion 4 has a shape corresponding to the corner portions of the rectangular tubular winding portions 2a and 2b. Further, portions (curved portions 41, 42) corresponding to the L-shaped end portions of the substantially L-shaped coil cover portion 4 are curved into shapes corresponding to the corner portions of the rectangular tubular winding portions 2a, 2b. doing. Of the four corners arranged in the circumferential direction of the winding portions 2a and 2b, the bending portion 40 and the bending portions 41 and 42 are corner portions, lower surface and inner portions connecting the lower surface and the outer surface of the winding portions 2a and 2b, respectively. The corner | angular part which connects a side surface, and the corner | angular part which connects an outer side surface and an upper surface are hold | maintained (refer FIG. 2).

  A plurality of comb teeth 4 c are formed on the inner peripheral surfaces of the bent portion 40 and the curved portions 41 and 42. In other words, the bent portion 40 and the curved portions 41 and 42 are support portions that support the comb teeth 4c. As shown in FIG. 3, each of the comb teeth 4 c has a tapered shape in which the thickness decreases from the support portion 40 (41, 42) toward the tip side. In each comb tooth 4 c, the thickness of the portion interposed between the turns of the coil 2 is smaller than the interval between the turns of the coil 2 in the free length of the coil 2. That is, a slight gap is generated between the comb teeth 4c and the portion where the coil 2 is disposed opposite to the comb teeth 4c.

  Since the gap between the turns of the coil 2 is the same as the cross section of the winding constituting each turn, as described above, the cross-sectional shape of the covered rectangular winding is a shape having the corner R portion 210. It can be roughly divided into a trapezoidal space 210S and a rectangular space 220S (see FIG. 3). The trapezoidal space 210 </ b> S is a space sandwiched between corner R portions 210 arranged to face each other between adjacent turns. The trapezoidal space 210 </ b> S is formed on the outer peripheral surface side and the inner peripheral surface side of the coil 2. In this embodiment, since the comb teeth 4c of the coil cover portion 4 disposed on the outer peripheral surface side of the coil 2 are interposed between the turns of the coil 2, a trapezoidal space formed on the outer peripheral surface side of the coil 2 here. 210S will be described as an example. The rectangular space 220 </ b> S is a space formed between the turns of the coil 2 with a minimum interval between the turns of the coil 2 sandwiched between adjacent straight portions 220. The comb teeth 4c are tapered so that the thick portion of the comb teeth 4c is located in the trapezoidal space 210S and the thin portion on the tip side of the comb teeth 4c is located in the rectangular space 220S. It has become.

  Compared to the case where the thickness of the comb teeth 4c is made to be uniform corresponding to the rectangular space 220S because the thickness of the support teeth side of the comb teeth 4c is increased corresponding to the trapezoidal space 210S. Thus, the strength of the comb teeth 4c can be improved. The maximum thickness T on the support portion side of the comb teeth 4c is larger than the interval (minimum interval among the intervals between the turns of the coil 2) S sandwiched between the linear portions 220 arranged to face each other between adjacent turns. The distance between the centers of the covered rectangular windings 2w constituting the adjacent turns in the free length of the coil 2 is smaller. When the thickness T is larger than the interval S, the strength of the comb teeth 4c can be improved. When the thickness T is smaller than the interval D, the comb teeth 4c do not press the turns of the coil 2 between turns. It is possible to secure a height H that can be interposed between the two. Moreover, it is mentioned that the ratio between the maximum thickness T and the height H of the comb teeth 4c satisfies T: H = 10: 1 to 1:30. When the size of the comb teeth 4c satisfies S <T <D and T: H = 10: 1 to 1:30, the insulation coating of the coil 2 is prevented from being damaged, and the comb teeth 4c are coiled. Easy to insert between 2 turns. The ratio T: H between the maximum thickness T and the height H of the comb teeth 4c may be 5: 1 to 1:20, particularly 1: 1 to 1:10.

  It is mentioned that the height H of the comb teeth 4c is less than ½ of the width W of the covered rectangular winding 2w. By doing so, damage to the insulation coating of the coil 2 due to the comb teeth 4c can be sufficiently prevented, and the comb teeth 4c are compared with the case where the height H of the comb teeth 4c is the full width W of the covered rectangular winding 2w. The amount of the constituent material used can be reduced. Further, when the comb teeth 4c are tapered, it is possible to effectively prevent the insulation coating from being damaged by the comb teeth 4c. The height H of the comb teeth 4c is sufficient if the comb teeth 4c can be interposed between the turns of the coil 2, and can be smaller than less than ½ of the width W of the covered rectangular winding 2w and less than １ ／. .

  In this embodiment, the comb tooth 4c has a triangular surface (see FIG. 3) in the direction along the longitudinal section of the coil 2, and the surface in the direction between the turns of the coil 2 and the support portions 40, 41, 42. Is formed by a triangular prism (triangular prism extending in the direction orthogonal to the plane of FIG. 3) having a quadrangular surface. In addition to the triangular prism, the comb teeth 4 c are triangular pyramids (triangles with the vertical direction in FIG. 3 as the axis in FIG. 3) that are triangular along the surfaces of the support portions 40, 41, 42 and intersect at one point toward the tip side of the comb teeth 4 c. Cone), a cone whose surface along the support portions 40, 41, and 42 is a circle, a hemisphere, and the like. Moreover, in the said triangular pyramid, a cone, etc., it is mentioned as a truncated pyramid or a truncated cone which the tip part of the comb tooth 4c was shaved. Since the tips of the comb teeth 4c are shaved and not sharp, when the comb teeth 4c are inserted between the turns of the coil 2, it is difficult to damage the insulation coating of the coils 2 with the comb teeth 4c.

  In this embodiment, the comb teeth 4c are sized such that the thick part is located in the trapezoidal space 210S and the thin part on the tip side is located in the rectangular space 220S (FIG. 3). See). In addition, the comb teeth 4c may be positioned only in the trapezoidal space 210S and not in the rectangular space 220S. In this case, the sum of the gaps formed between the comb teeth 4c and the portion of the coil 2 facing each other (the portion of the corner R portion 210) is the smallest of the intervals between the turns of the coil 2 (linear shape). The distance between the portions 220 is smaller than S). By doing so, even if the comb teeth 4c are not positioned in the rectangular space 220S, the comb teeth 4c positioned in the trapezoidal space 210S are rubbed before adjacent turns in the rectangular space 220S rub or collide with each other. Since it is in contact with the corner R portion 210, damage to the insulation coating of the coil 2 can be prevented. Moreover, since the space | interval S pinched | interposed into the linear part 220 can be made small because the comb-tooth 4c is located only in the trapezoid space 210S, the reactor 1 can be reduced in size. When the comb teeth 4c are positioned up to the rectangular space 220S, it is easy to prevent collisions between adjacent turns, and it is easy to prevent damage to the insulating coating of the coil 2.

  The comb teeth 4c may have a rectangular shape with a uniform thickness toward the tip side. In this case, since the gap between the turns of the coil 2 is divided into the trapezoidal space 210S and the rectangular space 220S, the comb teeth 4C are formed with the rectangular space 220S (the smallest interval among the turns of the coil 2). Space).

  The coil cover part 4 (the comb teeth 4c and the support parts 40, 41, 42) is preferably made of a non-conductive material. By doing so, when the comb teeth 4c are interposed between the turns of the coil 2, it is easy to ensure insulation between the covered rectangular windings 2w constituting the adjacent turns. Further, when the reactor 1 is brought into contact with the installation target, it is easy to ensure insulation between the installation target and the coil 2. Non-conductive materials include, for example, polyphenylene sulfide (PPS) resin, polytetrafluoroethylene (PTFE) resin, liquid crystal polymer (LCP), polyamide (PA) resin such as nylon 6, nylon 66, polybutylene terephthalate (PBT) Resin and thermoplastic resin such as acrylonitrile / butadiene / styrene (ABS) resin can be used. In addition, thermosetting resins such as unsaturated polyester resins, epoxy resins, urethane resins, and silicone resins can be used. Since resin is excellent in flexibility, it is preferable because the comb teeth 4c can be easily inserted between the turns of the coil 2. In addition, the coil cover portion 4 can be easily fitted into the winding portions 2a and 2b. The resin may contain a ceramic filler to improve the heat dissipation of the coil cover portion 4. As the ceramic filler, for example, nonmagnetic powder such as alumina or silica can be used.

  As a method of interposing the comb teeth 4c between the turns of the coil 2, as described later, the coil cover portion 4 and the end insulating portion 5 are mechanically engaged with the comb teeth 4c inserted between the turns. Therefore, it is possible to fix the comb teeth 4c so that they are positioned between the turns. Furthermore, when the comb teeth 4c are inserted between turns, an adhesive can be applied to each comb tooth 4c, and when the comb teeth 4c are positioned between the turns, the adhesive can be cured and fixed.

.. Each configuration including other characteristic portions The coil cover portion 4 includes a first turn and a final turn of the winding portions 2a and 2b on one end side and the other end side of the coil cover portion 4 in the bending portion 42 in the axial direction. Turn storing portions 421 and 422 into which the turns are fitted are formed. The length between the two turn accommodating portions 421 and 422 is substantially equal to the free length of the coil 2.

  The coil cover portion 4 further includes an engagement protrusion 4p for mechanically engaging the coil cover portion 4 and an end insulating portion 5 described later. This engagement protrusion 4p is a protrusion protruding in the axial direction of the coil cover part 4 (same as the axial direction of the winding parts 2a and 2b), and is provided on one end side and the other end side of the coil cover part 4 in the axial direction. There is one each. The engagement protrusion 4p is a substantially quadrangular prism-shaped protrusion, and has a tapered shape with a tip portion thereof cut obliquely. By making the engagement protrusion 4p taper, it is possible to easily fit the engagement protrusion 4p into an engagement hole 5h described later. By mechanically engaging the coil cover portion 4 and the end insulating portion 5, the position of the inner core component 310 in the winding portions 2a and 2b can be determined. Details will be described later.

-Magnetic core The magnetic core 3 is provided with the part arrange | positioned in the coil 2 (winding part 2a, 2b), and the part which the coil 2 was not substantially arrange | positioned but protruded from the coil 2. FIG. The magnetic core 3 in this example has a core part in which a part for constructing a magnetic path is covered with a resin, specifically, two inner core parts 310 and 310 (FIG. 2) and two outer core parts 320 and 320. (FIG. 1) is a component. The inner core component 310 includes a middle main body portion (inner core portion) 31 that constructs a magnetic path, and a middle resin mold portion 310m. The outer core component 320 includes a side main body portion (outer core portion) 32 that constructs a magnetic path, and a side resin mold portion 320m. The magnetic core 3 has a pair of outer core parts 320 and 320 assembled so as to connect a pair of side-by-side inner core parts 310 and 310, and the middle main body parts 31 and 31 and the side main body parts 32 and 32 are annularly arranged. When the coil 2 is excited, a closed magnetic circuit is formed.

..Middle body portion As shown in FIG. 2, the middle body portion 31 has a substantially rectangular parallelepiped core piece 31m containing a magnetic material and a gap material 31g having a lower magnetic permeability than the core piece 31m. It is a laminated columnar body. In addition, the middle main body 31 may be configured by a single columnar core piece. The entire middle body 31 may be accommodated inside the winding portions 2a and 2b, or at least a part of one end side and the other end side in the axial direction protrudes from the winding portions 2a and 2b. Also good. The core piece 31m constituting the middle main body 31 is made of a compacted body using a soft magnetic powder typified by an iron group metal such as iron or an alloy thereof, or a resin containing soft magnetic powder. A molded body, a laminate in which a plurality of magnetic thin plates (for example, electromagnetic steel plates) having an insulating coating are laminated, and the like can be used. A nonmagnetic material such as alumina can be used for the gap material 31g. In addition, the gap material 31g can be formed of a resin that forms a middle resin mold portion 310m described later.

-Middle resin mold part The middle resin mold part 310m is provided so that the outer peripheral surface may be covered along the external shape of the middle main-body part 31. FIG. The middle resin mold part 310m forms the end insulating part 5 that is fixed to the end surface of the middle main body part 31. As shown in FIG. 2, the end insulating portion 5 is interposed between the end surfaces of the winding portions 2 a and 2 b and the side main body portion 32, and positions the middle main body portion 31 and the side main body portion 32, and the coil. 2 and a member that secures insulation between the side main body 32. The end insulating portion 5 is also an incidental member that is mechanically engaged with the coil cover portion (insulating molded body) 4. Here, the side main body portion 31 and the end insulating portion 5 covered with the middle resin mold portion 310m are used in the form of a substantially L-shaped inner core component 310, 310 in which both are integrated. The pair of inner core components 310 and 310 are members having the same shape as shown in FIG. 2, and if one inner core component 310 is rotated 180 ° in the horizontal direction, the other inner core component 310 is formed. Note that the set of inner core components 310, 310 does not necessarily have the same shape.

  Positioning portions 511 and 512 for defining the attachment position of the side main body portion 32 in the end insulating portion 5 are formed on the outer surface, which is the surface on which the side main body portion 32 is disposed in the end insulating portion 5 (see FIG. 2). The positioning portions 511 and 512 are protrusions protruding from the outer surface of the end insulating portion 5, and the entire shape thereof is formed in a bracket shape. The portions surrounded by these bracket-shaped positioning portions 511 and 512 are slightly recessed from the other portions, and a portion of the end portion of the side main body portion 32 is stored in the recessed portion (storage space 51s). Thus, the position of the side main body portion 32 in the end insulating portion 5 is determined.

  A plurality of protruding portions 51p protruding from the bottom surface are formed on the bottom surface of the storage space 51s. These protrusions 51p are for supporting the side main body 32 fitted in the storage space 51s with a space from the bottom surface of the storage space 51s (see FIG. 2). By supporting the side main body portion 32 with a space from the bottom surface of the storage space 51s, when the side main body portion 32 is integrated with the end insulating portion 5 by the side resin mold portion 320m described later, the end surface of the side main body portion 32 And the bottom surface of the storage space 51s can be spread resin. Therefore, the gap formed between the middle main body 31 and the side main body 32 can be filled with resin. In this way, resin enters the gap between the middle main body portion 31 and the side main body portion 32, so that almost no air gap is formed, thereby reducing variations in magnetic characteristics (inductance, etc.) due to the air gap, and stable magnetic characteristics. Is obtained. In addition, since the gap formed between the end insulating portion 5 and the side main body portion 32 is filled with resin, almost no gap is formed, so that the bonding strength between the end insulating portion 5 and the side main body portion 32 is increased. Can be improved. The side main body portion 32 and the end insulating portion 5 are firmly integrated by a side resin mold portion 320m, which will be described later, so that the side main body portion 32 and the end insulating portion 5 are not rattling due to vibration transmitted from the vehicle. The effect which suppresses the vibration accompanying a space | gap can be anticipated.

  A window 51w is formed in a portion of the bottom surface of the storage space 51s corresponding to the end surface of the middle main body 31, and the end surface of the middle main body 31 is exposed from the window 51w. Therefore, when the side main body portion 32 is integrated with the end insulating portion 5 by the side resin mold portion 320m, the resin flows into the window 51w, and a resin gap is formed between the middle main body portion 31 and the side main body portion 32. It is formed. Also, an insertion hole corresponding to the size of the middle main body portion 31 molded with the middle resin mold 310 of the other inner core component 310 is inserted into the bottom surface of the storage space 51s of the one inner core component 310. 51h is formed.

  A cylindrical portion 51c and a partition portion 51d are formed on the inner surface (the surface on the side on which the side main body portion 31 is fixed) that is the surface of the end insulating portion 5 opposite to the storage space 51s. The cylindrical part 51c protrudes from the inner surface and forms the insertion hole 51h. The partition 51d is interposed between the winding portions 2a and 2b when the inner core components 310 and 310 are assembled to the coil 2, and maintains the separated state of the winding portions 2a and 2b. By this separation, the insulation between the winding parts 2a and 2b can be reliably ensured.

  An engagement hole 5 h for fitting the engagement protrusion 4 p of the coil cover portion 4 is formed in the end insulating portion 5. The inner shape / inner dimension of the engagement hole 5h is an inner shape / inner dimension in which the engagement protrusion 4p of the coil cover portion 4 can be press-fitted. Specifically, the engagement hole 5h has an inner dimension that is similar to the outer shape of the base portion of the engagement protrusion 4p and is slightly smaller than the outer size of the base portion.

  In the present embodiment, the middle resin mold 310m covers the outer peripheral surface of the middle main body 31 and the end insulating portion 5 is integrally formed to fix the end insulating portion 5 to the end of the middle main body 31. Yes. Of course, the middle main body part 31 and the end insulating part 5 covered with the middle resin mold part 310m are prepared separately, and the end insulating part 5 is fixed to the end part of the side main body part 31 by bonding or fitting. Is also possible.

-Side body part The side body part 32 is the core piece 32m comprised with the soft-magnetic material. The core piece 32m shown in this example has a dome shape (deformation base) in which the inner end surface to which the pair of inner core components 310 and 310 are connected is a flat surface, and the upper surface and the lower surface have a sectional area that decreases from the inner end surface toward the outside. Shape). Similarly to the core piece 31m of the middle main body 31, the side main body 32 that is the end face orthogonal to the magnetic flux of the coil 2 may also be configured by a laminated body in which electromagnetic steel plates are laminated. Alternatively, it may be composed of a compacted body obtained by pressure-molding soft magnetic powder, or may be composed of a composite material in which soft magnetic powder is dispersed in a resin. The side main body 32 and the core piece 31m of the middle main body 31 may have the same configuration or different configurations. As an example of the latter, for example, the middle main body 31 may be formed of a powder compact and the side main body 32 may be formed of a composite material.

..Side resin mold part The side resin mold part 320m covers the outer periphery of the side main body part 32 along the outer shape of the side main body part 32 except for the region to which the inner core component 310 is connected on the inner end surface. Is provided. In the present embodiment, the inner core component 310 and the side main body portion 32 are integrated by the side resin mold portion 320m. For example, if the inner core components 310 and 310 and the side main body portion 32 are disposed inside the mold and the mold is filled with a resin that is the material of the side resin mold portion 320m, the inner core components 310 and 310 and Side resin mold parts 320m and 320m that integrate the side main body part 32 and cover the outer periphery of the side main body part 32 can be formed.

  In the present embodiment, the terminal members 8a and 8b and the metal collar 6h are further fixed by the side resin mold parts 320m and 320m. The terminal members 8 a and 8 b are power supply paths connected to the ends of the coil 2. Further, the collar 6h constitutes an attachment hole for fixing the reactor 1 to the installation target.

  The constituent resin of the middle resin mold part 310m and the side resin mold part 320m is polyphenylene sulfide (PPS) resin. In addition, the above constituent resins include thermoplastic resins such as polytetrafluoroethylene (PTFE) resin, liquid crystal polymer (LCP), nylon 6, nylon 66, nylon 10T, nylon 9T, nylon 6T, and polybutylene terephthalate (PBT) resin. Can be mentioned. In addition, thermosetting resins such as unsaturated polyester resins, epoxy resins, urethane resins, and silicone resins can be used. Unsaturated polyester is advantageous in that it is difficult to break and is inexpensive. In addition, these resins may contain ceramic fillers such as alumina and silica to improve the heat dissipation of the resin mold portions 310m and 320m.

[Other configurations]
-Coil fixing part It is mentioned that the coil fixing part (not shown) which presses the coil 2 and regulates the movement of the coil 2 is provided between the inner peripheral surface of the coil 2 and the inner core part 310. As a coil fixing | fixed part, what is comprised from resin which encloses several air bubbles, ie, a foamed resin, is mentioned, for example. The coil fixing portion can be formed by cutting an unfoamed resin sheet into a predetermined shape, placing the resin sheet at a desired position of the inner core component, and then performing heat treatment necessary for foaming. By restricting the movement of the coil by pressing the coil with the coil fixing part, the coil moves in the axial direction and diameter with respect to the inner core component due to the vibration of the coil and magnetic core during the operation of the reactor or the influence of the external environment. It is possible to regulate movement in the direction and circumferential direction. Since the movement of the coil is regulated, it is possible to prevent the magnetic core from being damaged due to the vibration of the coil and the noise in addition to the damage of the insulating coating of the coil.

Sensor A sensor (not shown) that measures the physical quantity of the reactor 1 such as a temperature sensor, a current sensor, a voltage sensor, or a magnetic flux sensor can be provided. For example, the sensor can be arranged in a space formed between the two winding portions 2a and 2b.

-Heat radiation plate A heat radiation plate (not shown) can be provided at an arbitrary location on the outer peripheral surface of the coil 2. For example, if the installation surface (here, the lower surface) of the coil 2 is provided with a heat dissipation plate, the heat of the coil 2 can be well transmitted to the installation object such as the converter case through the heat dissipation plate, thereby improving the heat dissipation. As the constituent material of the heat sink, a material having excellent thermal conductivity, for example, a metal such as aluminum or an alloy thereof, a non-metal such as alumina, or the like can be used. You may provide a heat sink in the whole installation surfaces (here lower surface), such as the reactor 1. The heat radiating plate can be fixed to the assembly of the coil 2 and the magnetic core 3 by, for example, a bonding layer described later.

Bonding layer A bonding layer (not shown) can be provided on at least the installation surface (here, the lower surface) of the coil 2 out of the installation surface (here, the lower surface) of the reactor 1. By providing the bonding layer, the coil 2 can be firmly fixed to the heat sink when the installation target or the above heat sink is provided, the movement of the coil 2 is restricted, the heat dissipation is improved, the installation target or the heat sink Fixing stability can be achieved. Constituent material of the bonding layer contains an insulating resin, particularly ceramic filler, and has excellent heat dissipation (for example, thermal conductivity is 0.1 W / m · K or more, further 1 W / m · K or more, especially 2 W / M · K or more). Specific examples of the resin include thermosetting resins such as epoxy resin, silicone resin, and unsaturated polyester, and thermoplastic resins such as PPS resin and LCP.

[Reactor manufacturing method]
The manufacturing method of the reactor 1 provided with the structure demonstrated above is demonstrated based on FIGS.

  First, the coil 2, the coil cover parts 4 and 4, and the inner core components 310 and 310 are prepared. And the coil cover part 4 is inserted in the outer peripheral surface of the winding parts 2a and 2b of the coil 2. At this time, the comb teeth 4 c of the coil cover portion 4 are interposed between the turns of the coil 2. At that time, the first turn and the final turn of the winding parts 2a and 2b are fitted into the turn accommodating parts 421 and 422 (see FIG. 2) of the coil cover part 4, respectively, and the outer peripheral surfaces of the winding parts 2a and 2b. The coil cover part 4 is fixed to.

  Next, the area | region of the middle main-body part 31 of the inner core component 310 is inserted in the inside of winding part 2a, 2b. Then, the engagement protrusion 4p of the coil cover part 4 is fitted into the engagement hole 5h provided in the end insulating part 5 of the inner core component 310, and the coil cover part 4 and the end insulating part 5 are mechanically connected. Engage. By doing so, a pair of inner core components 310 and 310 are connected in an annular shape.

  Then, as shown in FIG. 2, the side main body portion 32 is fitted into the storage space 51 s of the end insulating portion 5, and the terminal members 8 a and 8 b are connected to the end portion of the coil 2 with solder or the like. When the side main body portion 32 is fitted, an adhesive may be applied to the end surface of the side main body portion 32 on the fitting side. An assembly of the coil 2 and the inner core parts 310 and 310, the side main body portions 32 and 32, and the integrated member of the terminal members 8a and 8b are arranged in the mold, and a metal collar constituting the mounting hole 6h (see FIG. 1) is placed in the mold. By filling the mold with resin and curing the resin, the side resin mold parts 320m and 320m are formed so as to cover the outer peripheries of the side main body parts 32 and 32. The side main body portion 32 is integrated with the inner core component 310 by the side resin mold portion 320m, and the reactor 1 of FIG. 1 can be completed.

〔effect〕
As described above, the reactor 1 of the present embodiment has the thickness of the comb teeth 4c interposed between the turns of the coil 2 smaller than the interval between the turns of the coil in the free length of the coil. At the time of manufacture, it is possible to prevent the insulating coating of the coil 2 from being damaged by the comb teeth 4c. In particular, since the comb teeth 4 c are tapered, the comb teeth 4 c can be easily inserted between the turns of the coil 2. Further, since the comb teeth 4c are interposed between the turns of the coil 2, even if the coil 2 moves during the operation of the reactor 1, it is possible to prevent the turns of the coil 2 from rubbing and colliding with each other. It is possible to prevent the insulating coating of 2 from being damaged. From the above, the reactor 1 according to the present embodiment is installed in the state of the reactor 1 shown in FIG. 1 without being housed in a case and embedded in the sealing resin or molded entirely with the sealing resin. Can be installed and used. Therefore, since the reactor 1 is in a state where the coil 2 and the like are exposed, for example, when the reactor 1 is used in a state where the reactor 1 is immersed in a liquid refrigerant, the reactor 1 can be efficiently cooled. As a result, it is possible to suppress the operation of the reactor 1 from becoming unstable due to heat. In addition, the direction of installation of the reactor 1 is not particularly limited, and the lower surface of the reactor 1 (the surface below the paper surface) may be installed as an installation target, or the other surface may be installed as the installation target.

<Embodiment 2>
In the second embodiment, the form in which the insulating molded body is an inner interposed portion interposed between the inner peripheral surface of each winding portion and the outer peripheral surface of the inner core portion disposed in each winding portion in the magnetic core will be described. . As an inner interposition part, the example which is a part of middle resin mold part demonstrated in Embodiment 1 is demonstrated. The second embodiment is different only in that the insulating molded body is a part of the middle resin mold portion, and the basic configuration of the comb teeth is the same as that of the first embodiment. The middle resin mold part is integrally formed with the middle body part (inner core part). In the middle resin mold portion, a plurality of comb teeth protruding outward are formed at portions corresponding to the corner portions of the respective winding portions. Even when the insulating molded body is a part of the middle resin mold portion, the comb teeth described above are interposed between the turns of the coil, so that damage to the insulating coating of the coil during manufacturing can be prevented and during operation It is possible to prevent damage to the insulating coating of the coil due to vibration of the coil.

<Embodiment 3>
In the third embodiment, another form in which the insulating molded body is an inner interposed portion will be described. The inner interposition part in the third embodiment is an independent intervening member that is independent of the core component (inner core part) described in the first embodiment. The third embodiment is different only in that the insulating molded body is a member independent of the inner core portion, and the basic configuration of the comb teeth is the same as that of the first embodiment. The inner core portion is the middle main body portion described in the first embodiment, and does not include a middle resin mold portion on the outer peripheral surface of the middle main body portion. Examples of the independent intervening member include a form including a flat portion corresponding to the flat portion of the inner periphery of each winding portion and a curved portion corresponding to a corner portion of each winding portion. A plurality of comb teeth projecting outward are formed on the outer peripheral surface of the curved portion. That is, the curved portion is a support portion that supports the comb teeth. At this time, if comb teeth are formed at three corners among the four corners of each winding portion, the comb teeth can be easily arranged. Even when the insulating molded body is an independent interposed member, the above-described comb teeth are interposed between the turns of the coil, so that damage to the insulating coating of the coil during manufacturing can be prevented, and the vibration of the coil during operation It is possible to prevent damage to the insulating coating of the coil due to the above. The shape of the independent intervening member is not limited to the shape described above.

<Embodiment 4>
In the fourth embodiment, the insulating molded body is a comb tooth piece including a bar-like or flat plate-like support portion extending in the longitudinal direction of each winding portion and a plurality of comb teeth protruding outward from the support portion. A form is demonstrated. The basic configuration of the comb teeth is the same as that of the first embodiment. The comb teeth are arranged on the inner peripheral side or the outer peripheral side of each winding portion, and the comb teeth are inserted between the turns of the coils of each winding portion. At this time, when inserting the comb teeth between turns, an adhesive is applied to each comb tooth, and the adhesive is cured and fixed in a state where the comb teeth are positioned between the turns. By providing the comb-teeth piece as the insulating molded body, for example, even if no comb teeth are formed on the coil cover part 4, the middle resin mold part, and the independent interposed member, insulation between the turns of the coil can be performed. Even when the insulating molded body is a comb tooth piece, the above-described comb teeth are interposed between the turns of the coil, so that damage to the insulating coating of the coil at the time of manufacture can be prevented, and the vibration of the coil during operation It is possible to prevent damage to the insulating coating of the coil due to the above.

<Test example>
In an edgewise coil formed by coating an edgewise winding of a covered rectangular winding, a reactor (sample Nos. 1 to 4) having comb teeth interposed between coil turns, and a reactor (nothing interposed between coil turns) Sample No. 5) was prepared, and a vibration test was performed on each reactor. In FIG. About the reactor of 1-4, the state of the comb tooth interposed between the turns of a coil is shown typically. In the vibration test, after the reactor was vibrated with a vibration testing machine, the covering state between the windings of the coil and the characteristics as the reactor were evaluated.

・ Sample No. 1
Sample No. 1 includes a coil cover portion (insulating molded body) having comb teeth described in the first embodiment (see FIGS. 1 to 3), and each comb tooth is interposed between turns of the coil, and the coil cover portion. Was mechanically engaged with the end insulating portion to fix the state where the comb teeth were interposed between the turns. At this time, each comb tooth has a trapezoidal cross section (see the upper left in FIG. 4). For each comb tooth 4c, the height is H, the maximum thickness on the support portion 40 (41, 42) side is T, the minimum interval among the turns of the coil is S, and adjacent turns in the free length of the coil are When the center-to-center distance of the covered rectangular winding 2w is D (see FIG. 3), S <T <D is satisfied, H = (1/10) × W, T: H = 1: 1. 3. Sample No. In the reactor 1, each comb tooth 4 c has a thickness of a portion interposed between the turns of the coil 2 smaller than the interval between the turns of the coil 2 in the free length of the coil 2, as shown in the upper left of FIG. 4. There was a slight gap between the comb teeth 4c and the opposing surfaces of the adjacent turns of the coil 2. That is, sample no. 1, a gap is formed between the comb teeth 4c and the turn in both the trapezoidal space 210S and the rectangular space 220S (see FIG. 3) between the turns.

・ Sample No. 2
Sample No. As a reactor No. 2, sample No. The same comb tooth 4c as 1 was interposed between the turns of the coil 2 (same as the upper left of FIG. 4). At this time, when each comb tooth 4c was inserted between turns, an adhesive (not shown) was applied to each comb tooth 4c, and when the comb tooth 4c was positioned between turns, the adhesive was cured. That is, sample no. In 2, the coil cover portion was mechanically engaged with the end insulating portion, and the state where the comb teeth 4c were interposed between the turns was fixed by an adhesive.

・ Sample No. 3-1, 3-2
Sample No. As the reactors of 3-1 and 3-2, sample No. Comb teeth 4 c having a different comb tooth size from 1 are interposed between the turns of the coil 2. Sample No. The comb teeth of 3-1 and 3-2 satisfy S <T <D, and H = (3/5) × W and T: H = 1: 50. Sample No. In the reactors of 3-1 and 3-2, each comb tooth 4 c has a part thickness interposed between the turns of the coil 2 larger than the interval between the turns of the coil 2 in the free length of the coil 2. Therefore, sample no. In the reactor of 3-1, as shown in the upper right of FIG. 4, each comb tooth 4c is press-fitted between the turns of the coil 2, the coil cover part is mechanically engaged with the end insulating part, and the comb tooth 4c. Was fixed in contact with adjacent turns. Sample No. In the reactor of 3-2, as shown in the lower left of FIG. 4, each comb tooth 4 c was not forcibly inserted between the turns of the coil 2. Sample No. In each of 3-1 and 3-2, comb teeth 4 c are arranged in a trapezoidal space 210 </ b> S and a rectangular space 220 </ b> S (see FIG. 3) between turns.

・ Sample No. 4
Sample No. As a reactor No. 4, sample no. Comb teeth 4 c having a different comb tooth size from 1 are interposed between the turns of the coil 2. Sample No. The 4 comb teeth 4c do not satisfy S <T <D, and H = (1/50) × W and T: H = 20: 1 (see the lower right in FIG. 4). Sample No. 4, the comb teeth 4c are in contact with only the corners R of the turn and are disposed in the trapezoidal space 210S and do not reach the rectangular space 220S.

・ Sample No. 5
Sample No. The reactor No. 5 was not provided with an insulating molded body, and nothing was interposed between the turns of the coil.

  Sample No. mentioned above. 1 to Sample No. Regarding the reactor No. 5, the reactor was vibrated with a vibration testing machine, and then the covering state between the windings of the coil was visually observed and examined. As a result, Sample No. using comb teeth in which the thickness of the portion interposed between the turns of the coil is smaller than the interval between the turns of the coil in the free length of the coil. 1 and sample no. In No. 2, no damage was found in the insulating coating of the coil. In addition, the sample No. in which the comb teeth were not forcibly inserted between the turns of the coil. In 3-2, no damage was found in the insulating coating of the coil. On the other hand, using a comb tooth in which the thickness of the portion interposed between the turns of the coil is larger than the distance between the turns of the coil in the free length of the coil, sample No. In 3-1, damage was seen in the insulation coating of the coil. The reason for this seems to be that the comb-teeth whose thickness was larger than the distance between the turns of the coil in the free length of the coil were forcibly inserted, and the coil insulation was damaged by the comb-teeth during this insertion. . In addition, the sample no. 4 and Sample No. in which nothing was interposed between the turns of the coil. 5 also showed damage to the insulating coating of the coil. This is because sample no. 4 and sample no. In No. 5, since the comb teeth are not interposed between the turns of the coil, it is considered that the coil's insulating coating was damaged by rubbing or colliding the turns of the coil due to the vibration of the reactor (coil).

  In addition, the above-mentioned sample No. 1 to Sample No. About the reactor of 5, the characteristic as a reactor was investigated. As a result, the sample No. in which the insulation coating of the coil was not damaged was observed. 1 and sample no. In 2, the initial state could be maintained. Specifically, the withstand voltage was 90% or more of the initial value. On the other hand, Sample No. in which the insulation coating of the coil was not damaged was observed. In 3-2, although comb teeth having a thickness of a portion interposed between coil turns larger than the interval between the coil turns in the free length of the coil are used, the comb teeth are inserted between the coil turns. Since it was not inserted forcibly, the comb teeth floated, the coil cover part (insulating molded body) popped out, the volume of the reactor increased, and this was not good from the viewpoint of miniaturizing the reactor. Sample No. in which the insulation coating of the coil was damaged In 3-1, 4, and 5, the insulation performance between the turns of the coil was lowered. As described above, the comb teeth interposed between the turns of the coil are smaller than the interval between the turns of the coil in the free length of the coil, so that the insulation of the coil is damaged during the manufacture of the reactor and during the operation of the reactor. It can be prevented.

  The reactor of the present invention includes various on-vehicle converters (typically DC-DC converters) mounted on vehicles such as hybrid vehicles, plug-in hybrid vehicles, electric vehicles, and fuel cell vehicles, and converters for air conditioners. It can utilize suitably for the component of a converter and a power converter device.

DESCRIPTION OF SYMBOLS 1 Reactor 2 Coil 2a, 2b Winding part 2r Connection part 2w Winding 210 Corner | angular R part 220 Linear part 210S Trapezoid space 220S Rectangular space 3 Magnetic core 310 Inner core part 320 Outer core part 310m Middle resin mold part 320m Side Resin mold part 31 Middle body part (inner core part) 32 Side body part (outer core part)
31 m, 32 m Core piece 31 g Gap material 4 Coil cover part (insulated molded body)
40 bent portions (support portions) 41, 42 curved portions (support portions) 4c comb teeth 421, 422 turn storage portions 4p engaging protrusions 5 end insulating portions 511, 512 positioning portions 5h engaging holes 51c cylindrical portions 51d partition portions 51h Insertion hole 51p Protruding part 51s Storage space 51w Window 6h Color 8a, 8b Terminal member

Claims (7)

A reactor comprising a coil formed by winding a winding in a spiral and a magnetic core having a portion disposed in the coil,
An insulating molded body having comb teeth interposed between the turns of the coil and a support portion for supporting the comb teeth;
Each of the comb teeth is a reactor in which the thickness of the portion interposed between the turns of the coil is smaller than the interval between the turns of the coil in the free length of the coil.   The reactor according to claim 1, wherein the comb teeth have a tapered shape that decreases in thickness toward a tip side. The coil is an edgewise coil formed by edgewise winding a rectangular winding with a rectangular cross section,
The reactor according to claim 1 or 2, wherein a height of the comb teeth is less than ½ of a width of the rectangular winding. The rectangular winding has a cross-sectional shape having a corner R portion with rounded corners,
The height of the comb teeth is H, the maximum thickness of the comb teeth on the support portion side is T, the smallest interval among the turns between the turns of the coil is S, and adjacent turns in the free length of the coil are configured. When the distance between the centers of the flat windings to be taken is D,
The reactor according to claim 3, wherein S <T <D is satisfied and T: H = 10: 1 to 1:30 is satisfied.   The insulating molded body is interposed between a coil cover portion disposed on the outer peripheral surface of the coil or an inner peripheral surface of the coil and an outer peripheral surface of an inner core portion disposed in the coil of the magnetic core. The reactor according to any one of claims 1 to 4, wherein the reactor is any one of the inner interposed portions.   A coil fixing portion that is disposed between an inner peripheral surface of the coil and an outer peripheral surface of an inner core portion disposed in the coil of the magnetic core, and presses the coil to restrict movement of the coil; The reactor of any one of Claims 1-5.   The reactor according to any one of claims 1 to 6, wherein the comb teeth are made of any one of a thermosetting resin, a thermoplastic resin, and ceramics.

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