JP2015130372A - Reactor coil bobbin and winding core holder, and reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor coil bobbin and winding core holder capable of winding a primary coil and a secondary coil by holding a gapped winding core on the assumption that the winding core is annealed and used while forming a gap, and to provide a reactor together.SOLUTION: The reactor coil bobbin and winding core holder includes a synthetic resin frame body 1 including: a pair of hollow cylindrical core holding parts 6 and 6 for holding a gapped winding core 2; a pair of connection parts 7 for connecting the core holding parts while interposing a predetermined interval therebetween; and spacer pieces 8 integrally formed at any suitable positions on outer peripheral surfaces of the core holding parts. The frame body divides both the core holding parts and the spacer pieces in intermediate portions. Two pairs of opposing divided core holding parts include, in end portions, engaging parts 9 and 10 which can be connected with each other in the state where the gapped winding core is extrapolated and the spacer pieces are fitted into the gap. Outside of both the connection parts and inside of both the core holding parts, a coil holding part 11 for winding a coil strand is continuously formed.

Description

  The present invention relates to a coil bobbin / winding core holder for a reactor and a reactor, and more particularly to a coil bobbin / winding core holder for manufacturing a reactor while holding a coil and a wound core with a gap, and a reactor using the same. .

  Conventionally, various transformers (transformers) are used for power conversion, voltage conversion, and the like in various electric devices ranging from high power to low power. In such a transformer, a primary coil and a secondary coil are magnetically coupled with an iron core, an alternating current is input to the primary coil to generate a variable magnetic field, and this is transmitted to a secondary coil coupled with a mutual inductance. The current is again converted into current by electromagnetic induction and output to the secondary coil. Transformer iron cores are suitable for materials with low iron loss, high saturation magnetic flux density and high permeability, and are often made of grain-oriented electrical steel sheets that are easily magnetized in a specific direction. In some cases, an amorphous magnetic material is used. As a form of the iron core, there are a laminated core of thin steel plates whose surfaces are insulated to reduce eddy current loss, and a wound iron core wound with a strip-shaped steel plate. It is also known to increase the magnetic resistance of a transformer and use it as a reactor (gap core reactor) for protecting equipment, suppressing abnormal voltage, and the like.

  Patent Document 1 includes a pair of iron core assembling portions in which at least a part of the outer periphery of the cross section is arcuate and a pair of connecting portions that connect these iron core assembling portions, and a concave groove is provided on the entire outer periphery. A coil bobbin, a winding formed by winding a conductor around the concave groove of the coil bobbin, and a cylinder in which the curvature of the inner periphery coincides with the curvature of the outer periphery of the cross section of the core assembly by winding the electromagnetic steel sheet a plurality of times And a pair of wound cores respectively assembled to the iron core assembling part, wherein at least one gap penetrating in the axial direction and the radial direction is formed. It is disclosed.

  Here, the gap-wrapped iron core is formed by first winding a strip-shaped electromagnetic steel sheet into a cylindrical shape, then annealing, and penetrating in the annealed cylindrical steel sheet in the axial direction (bus line direction) and the radial direction. A gap to be formed is formed. Then, it is assembled by pushing the gap of the gap-wrapped core into the leg portion (iron core assembly) of the winding in which the conductor is wound a plurality of times in the concave groove of the coil bobbin. In order to maintain the gap width and the angle of the gap with respect to the radial direction of the wound core, spacers made of a nonmagnetic material may be disposed in the gap.

JP 2003-257745 A

  However, in the reactor of Patent Document 1, when assembling the wound core with a gap to the core assembly part of the coil bobbin by assembling the gap by pushing the gap together, a special jig is required to widen the gap. On the other hand, it takes a lot of labor. On the other hand, when pulling out from the inside of the core with gaps one turn at a time and assembling it into the core assembly, it is easy to push the gap, but it is necessary to transfer many one-turn cores Is very time consuming. At this time, in order not to impair the properties of the electrical steel sheet, it is necessary to limit the dimension for expanding the gap so that the electrical steel sheets constituting each layer of the wound core are deformed within the elastic limit. Cost.

  In the case of an amorphous wound iron core, the amorphous magnetic steel strip is very thin and becomes brittle when annealed, so it is difficult to widen the gap. Furthermore, after annealing the wound core, if the gap is widened and assembled to the core assembly of the coil bobbin, a slight misalignment occurs between the layers of the wound core, so that it does not completely return to the annealed state, and the magnetic characteristics are It may decrease.

  Therefore, in view of the above-described situation, the present invention intends to solve the problem of holding the gap-wound core and using the primary coil on the premise that the gap is formed after annealing. And a coil bobbin / winding iron core holder for a reactor capable of winding a secondary coil, and a reactor using the same.

  In order to solve the above-mentioned problem, the present invention forms a gap that extends in the axial direction and extends linearly from the inner circumference side to the outer circumference side after the magnetic steel strip wound in a cylindrical shape a predetermined number of times is annealed. A pair of hollow cylindrical iron core holding portions for holding a gap-wound wound iron core, a pair of connecting portions for connecting the iron core holding portions at a predetermined interval, and a single unit at appropriate positions on the outer peripheral surface of the iron core holding portion And a spacer made of a synthetic resin, the frame is divided at both core holding portions and the middle portion of the spacer pieces, and the two opposed pairs of split core holding portions are provided with the gap. With the winding core extrapolated and the spacer piece fitted in the gap, the end is provided with an engaging portion that can be connected to each other, and the coil wire is wound around the outside of both connecting portions and the inside of both core holding portions. For continuously forming a coil holding portion for To constitute a reactor for the coil bobbin Kenmaki core holder that (claim 1).

  Here, the frame body is divided at the center of both the iron core holding portions and the spacer pieces, and the male engagement portion is formed on one of the pair of divided iron core holding portions, and the male engagement portion is engaged on the other. It is preferable that a female engaging portion to be joined is formed, and that both divided frame bodies have the same shape and are 180-degree rotationally symmetrical with each other (Claim 2).

  Furthermore, at both ends of the iron core holding part, a flange part that is continuous with the connecting part and protects the end part of the gap-wrapped iron core is integrally formed, and the coil wire is disposed at the center of the flange part. It is also preferable to form an opening to be drawn out (Claim 3).

  And the said spacer piece is integrally formed in the outer side or the inner side of the said iron core holding | maintenance part (Claim 4).

  Specifically, the spacer piece is formed continuously with the flange portion or the connecting portion, and is divided together with the iron core holding portion at the center to form a divided spacer piece, and when the divided iron core holding portion is connected, the divided spacer pieces are connected to each other. Are butt-joined (claim 5).

  And it is also preferable that the said frame body is shape | molded with an electrically insulating and heat conductive resin composition (Claim 6).

  Further, the present invention uses the above-described reactor coil bobbin and wound iron core holder, extrapolates and holds the wound iron core with the gap between both iron core holding portions of the frame, and inserts the spacer piece into the gap, At least two sets of coil strands, each of which becomes a primary coil and a secondary coil, are wound in an insulated state on coil holding portions formed continuously outside the two coupling portions of the frame and inside the core holding portions. The reactor characterized by this is provided (claim 7).

  Here, in the reactor according to the present invention, the frame body is clamped and held in a direction in which the two divided frame bodies are engaged with each other by a metal support frame body, and the support frame body includes an attachment portion to the installation surface. (Claim 8).

  The reactor coil bobbin and wound core holder according to the first aspect of the present invention as described above extends in the axial direction after the magnetic steel strip wound in a cylindrical shape a predetermined number of times is annealed, and linearly extends from the inner peripheral side to the outer peripheral side. A pair of hollow cylindrical iron core holding portions that hold a gap-wound core formed by forming a continuous gap in a shape, a pair of connecting portions that connect the iron core holding portions at a predetermined interval, and the iron core holding portion A frame made of a synthetic resin provided with a spacer piece integrally formed at a proper position on the outer peripheral surface of the frame, and the frame is divided at both core holding portions and the middle portion of the spacer piece, and two pairs of opposed divisions. The iron core holding portion is provided with an engagement portion that can be connected to each other with the gap pieces wound around the gap and the spacer pieces fitted into the gap. A coil for winding the coil wire inside. Since the cable holding part is formed continuously, the gapd wound core is extrapolated to the divided core holding part of one of the divided frames, and at the same time the gap is inserted into the divided spacer piece, and then the other divided frame By inserting the split core holding part of the body into the gap-wrapped core and simultaneously inserting the split spacer pieces into the gap and connecting the engagement parts with each other, the gap-wrapped core can be held in the frame, Moreover, since the spacer piece formed integrally with the iron core holding part is fitted in the gap, the gap-wrapped iron core can be held at a fixed position without rattling, and the gap-wrapped iron core is in a state when annealed. Since it can be used as it is, there is no fear of deterioration of magnetic characteristics, and the insulated state in which the coil wire is wound around the coil holding portion and is not in contact with the gap-wrapped core can be maintained.

  According to a second aspect of the present invention, the frame body is divided at the center of both the core holding parts and the spacer pieces, and the male engaging part is formed on one of the pair of divided core holding parts, and the male engaging part is on the other side. Forms a female engagement part that engages the joint part, and both split frame bodies have the same shape and are 180-degree rotationally symmetrical with each other, so it can be configured with a small number of parts and types and provided at low cost it can.

  According to claim 3, at both ends of the iron core holding portion, a flange portion that is continuous with the connecting portion and protects an end portion of the wound core with gap is integrally formed, and at the center portion of the flange portion. Since an opening for drawing out the coil wire is formed, both core holding parts are connected by a connecting part reinforced by a flange part, so that the strength is increased and both ends of the iron core holding part are protected by the flange part. The coil wire can be wound from the opening of the flange portion through the inside of the iron core holding portion.

  According to claim 4, when the spacer piece is integrally formed on the outside of the iron core holding part, the work of inserting the spacer piece into the gap of the wound core with gap is facilitated, and the spacer piece is When it is integrally formed inside the iron core holding part, both the iron core holding parts can be connected together with the connecting part by making the spacer pieces on both sides continuous to form a single thin plate part. Strength is greatly improved.

  According to a fifth aspect of the present invention, the spacer piece is formed continuously with the flange portion or the connecting portion, and is divided together with the iron core holding portion at the center to form a divided spacer piece, and when the divided iron core holding portion is connected, the divided spacer is formed. Since the pieces are butt-joined to each other, the frame body can be easily manufactured, and the assembly work of the gap-wrapped core can be facilitated.

  According to the sixth aspect, since the frame body is formed of an electrically insulating and thermally conductive resin composition, Joule heat generated from the coil can be quickly transmitted through the frame body and radiated.

  The reactor of the invention according to claim 7 uses a coil bobbin and wound core holder for the reactor, and extrapolates and holds the wound core with the gap between both core holding portions of the frame, and inserts the spacer piece into the gap. And at least two sets of coil strands, each of which becomes a primary coil and a secondary coil, are insulated from each other on the coil holding portions formed continuously outside the both connecting portions of the frame body and inside the core holding portions. Since it is wound, it is possible to easily and reliably hold the gap-wrapped core in the core holder, and at the same time, it is possible to attach a spacer piece to the gap of the gap-wrapped core, and the coil wire to the coil holder It is possible to maintain an insulation state that does not come into contact with the wound core with gaps and that the gapd core is annealed and then used with the gap formed. Since it is, the amorphous wound iron core having excellent high frequency magnetic characteristics can be employed.

  According to an eighth aspect of the present invention, the frame body is clamped and held in a direction in which the two divided frame bodies are engaged with each other by a metal support frame body, and the support frame body includes an attachment portion to the installation surface. Therefore, the frame body is reinforced by the support frame body to improve the strength and durability, and can be attached to the installation surface by using the attachment portion of the support frame body, and the installation work is simple.

It is a whole perspective view which shows the coil bobbin and wound iron core holder for reactors of this embodiment. It is a side view similarly. It is an exploded perspective view similarly. It is a cross-sectional view similarly. It is a longitudinal cross-sectional view similarly. It is a disassembled perspective view which similarly shows the procedure of mounting | wearing a product with a gap with a wound iron core. It is a top view which similarly shows the reactor of embodiment. It is the X1-X1 sectional view taken on the line of FIG.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 to 6 show a coil bobbin and wound iron core holder for a reactor according to the present invention, and FIGS. 7 and 8 show a reactor A according to the present invention. In the figure, reference numeral 1 denotes a frame, 2 denotes a wound core with a gap, 3 denotes a coil wire, and 4 denotes a support frame.

  The coil bobbin and wound core holder for a reactor of the present invention has an inner circumference extending in the axial direction of the wound core by an appropriate method after the amorphous magnetic steel strip or the directional electromagnetic steel strip wound in a cylindrical shape is annealed a predetermined number of times. A pair of hollow cylindrical iron core holding portions 6 and 6 holding a gap-wound core 2 formed by forming a linearly continuous gap 5 from the side to the outer peripheral side, and the iron core holding portions 6 and 6 at a predetermined interval. The frame 1 is composed of a synthetic resin frame 1 having a pair of connecting portions 7 and 7 that are connected to be spaced apart from each other, and a spacer piece 8 that is integrally formed at an appropriate position on the outer peripheral surface of the iron core holding portion 6. Is divided at the intermediate part between the core holding parts 6 and the spacer piece 8, and two pairs of divided iron core holding parts 6 </ b> A and 6 </ b> B that face each other extrapolate the wound core 2 with gap and insert the spacer piece 8 into the gap 5. In this state, engaging portions 9 and 10 that can be connected to each other are provided at the end portions. Rutotomoni, within the outer and two core holding portions 6 of the two joining portions 7, and has a basic structure of the coil holding portion 11 is formed continuously for winding the coil wire 3.

  More specifically, as shown in FIG. 3, the frame body 1 is divided at the center of both the core holding parts 6 and 6 and the spacer piece 8, and one of the pair of divided core holding parts 6A and 6B is attached to the male type. A joining portion 9 is formed, and a female engaging portion 10 that engages the male engaging portion 9 is formed on the other side, and both divided frame bodies 1A and 1B have the same shape and are 180-degree rotationally symmetrical with each other. Yes. Here, the male engagement part 9 is formed at the end of the split core holding part 6A, and the female engagement part 10 is formed at the end of the split core holding part 6B. That is, the divided frame bodies 1A and 1B have a shape in which the divided core holding portion 6A and the divided core holding portion 6B are arranged side by side on both sides of the connecting portion 7, respectively, and are the same if rotated in a horizontal plane of 180 degrees. Become. Therefore, the divided frame bodies 1A and 1B can be easily managed by molding a large number of one type with a synthetic resin and taking out two of them to form a pair.

  Further, outside the connecting portions 7 and 7, flange portions 12 and 12 that are connected to the connecting portion 7 at both ends of the iron core holding portions 6 and 6 and protect the ends of the wound core 2 with gaps. And an opening 13 through which the coil wire 3 is drawn out is formed at the center of the flange portion 12. The opening portion 13 communicates with the center hole 14 of the iron core holding portion 6, and the inner portion forms an arcuate surface 15 for guiding the coil wire 3. In the present embodiment, the flange portions 12 and 12 on both sides arranged adjacent to each other are continuous at the center portion, and are integrated with the connecting portion 7 to firmly connect the end portions of both the core holding portions 6 and 6. .

  The frame 1 can be made of various materials such as general-purpose polypropylene (PP), acrylonitrile / butadiene / styrene resin (ABS resin) as long as it is a synthetic resin, and an electrically insulating thermally conductive filler for the base resin. It is also preferable to mold with an electrically insulating and thermally conductive resin composition filled with. If a material having a high thermal conductivity is used as the material of the frame body 1, the Joule heat generated from the coil formed by winding the coil wire 3 is quickly transmitted, and from the entire frame body 1, Heat can be radiated from the gap-wrapped core 2 in contact with the frame 1 to suppress temperature rise and further increase in electrical resistance.

  The gap-wrapped iron core 2 used in the present invention is not particularly limited, but examples of the material of the amorphous wound core include Metglas, Inc. A ribbon-shaped amorphous alloy (METGLAS 2605TCA = 2605SA1) made of 0.025 mm thick, or a ribbon-shaped alloy made of fine crystal grains of about 0.02 mm thick made by Hitachi Metals (Finemet FT-3) Is mentioned. Here, “METGLAS” refers to Metglas, Inc. "Finemet" is a registered trademark of Hitachi Metals, Ltd.

  The gap-wrapped core 2 is manufactured by forming a gap core or a round product called a toroidal core and annealing it, and then forming the gap 5 by an appropriate method. The square toroidal core is produced by winding a material ribbon into a round shape and forming it into a square shape and then annealing it, or winding the material ribbon into a square shape and annealing it. The round toroidal core is manufactured by winding and annealing a material ribbon into a round shape. In the present embodiment, a square gap-shaped wound core 2 is used.

The gap 5 of the wound core 2 with gap needs to be formed by a cutting method in which a so-called “burl” or “burr” is not formed on the amorphous magnetic steel strip or the directional electromagnetic steel strip. An example of such a cutting method is a wire cutting method using a wire electric discharge machine. However, the gap 5 may be formed by another method if the “kaeri” or the like is not formed.
The width of the gap 5 is not particularly limited, but usually about 0.1 to 3 mm is preferable. If the width of the gap 5, that is, the thickness of the spacer piece 8 is too thin, it becomes difficult to form the spacer piece 8 by injection molding. Moreover, although the spacer piece 8 integrally formed in the said iron core holding | maintenance part 6 is provided in the outer side of the wound core holding | maintenance part 6 in this embodiment, it may be inside. The spacer pieces 8 and 8 may be provided inside the wound core holding parts 6 and 6 on both sides, respectively, or the spacer pieces 8 and 8 may be constituted by a single continuous thin plate. The strength of the frame 1 serving as the iron core holder is increased.

  The coil wire 3 used in the present invention is not particularly limited. However, in the case of a high-frequency reactor, a high-frequency current mainly flows through the skin of the conductor, so that a coil with a large surface area is used. . For example, a litz wire covered with an insulating layer or a flat wire covered with an insulating layer is used, but all of them are sufficiently flexible, so an iron core extrapolated with a gap-wrapped core 2 is used. It is possible to wind through the inside of the holding part 6.

  More specifically, the iron core holding portion 6 has a rectangular tube shape, and flange portions 12 and 12 for protecting the end portion of the wound core 2 with gaps are integrally formed at a boundary portion with the connecting portion 7. An opening 13 through which the coil wire 3 is drawn out is formed at the center of the part 12, and the bottom of the core holding part 6 is defined as the coil holding part 11. That is, the coil holding part 11 passes through the bottom of the center hole 14 of one iron core holding part 6, along the outer surface of the connecting part 7 from the opening 13, and again from the opening 13 to the center of the other iron core holding part 6. This is a path through the bottom of the hole 14. The same applies to the connecting portion 7 on the opposite side.

  The spacer piece 8 is formed continuously with the flange portion 12 or the connecting portion 7 and is divided together with the iron core holding portions 6 and 6 at the center to form divided spacer pieces 8A and 8A, and the divided iron core holding portion 6A. , 6B are joined together by butt-joining the divided spacer pieces 8A, 8A.

  Further, the outer surface of the end portion of the quadrangular cylindrical split core holding portion 6A is stepped down to form the male engaging portion 9, while the inner surface of the end portion of the quadrangular cylindrical split core holding portion 6B is formed. As shown in FIG. 4, the male engaging portion 9 and the female engaging portion 10 are engaged with each other inside and outside.

  As shown in FIG. 6, the gap-wrapped core 2 is formed with a square hole 16 at the center, and the split core holding portions 6A, 6B of the split frames 1A, 1B are respectively connected to the gap-wrapped cores from both sides. At the same time as being inserted into the two or two square holes 16, 16, both divided spacer pieces 8 A and 8 A are inserted into the gap 5 of the gap-wrapped core 2, and the male engaging portion 9 and the female engaging portion 10 are internally provided. To be connected. In this case, the wound core 2 with gap is externally fitted and held on the core holding part 6 without rattling. Here, an adhesive is applied to the male engaging portion 9 and the female engaging portion 10, and at the same time when the divided frame bodies 1A and 1B are engaged, the joining portions are bonded and integrated, Let it be a frame 1. When the round gap-wound core 2 is used, the iron core holding part 6 is cylindrical. However, since the spacer piece 8 is fitted into the gap 5, the round gap-wound core 2 is cylindrical. There is no rotation around the iron core holding part 6.

  Then, as shown in FIG. 7, the coil strand 3 is formed on the coil holding portion 11 formed along the outer surface of the connecting portion 7 from the bottom of the center hole 14 of the core holding portion 6 located inside the gap-wrapped core 2. Is wound a predetermined number of times to form a primary coil 3A, and an insulating sheet or a U-shaped insulating member is interposed on the outer side thereof, and another coil wire 3 is wound a predetermined number of times to form a secondary coil 3B. In the figure, reference numeral 17 denotes a lead wire of the primary coil 3A, and 18 denotes a lead wire of the secondary coil 3B. However, in the present invention, the number of secondary coils 3B is not limited to one, and any one including a plurality of secondary coils or a plurality of taps drawn from one secondary coil may be used.

  The reactor A configured by holding the gap-wrapped cores 2 and 2 on the frame body 1 and winding the coil wire 3 around the coil holding portion 11 is further completed by attaching a metal support frame body 4. In the support frame 4, a base metal fitting 19 having a substantially L-shaped cross section at a lower portion and a connecting metal fitting 20 having an angled shape at an upper portion constitute a pair of quadrangular side frame bodies 4 A and 4 B that are formed on both sides of the frame body 1. It is the structure which arrange | positions and attracts mutually with the some fastening bolt 21, ..., and fastens in the direction which engages the said division | segmentation frame 1A, 1B. That is, the base bracket 19 is composed of a vertical plate and a horizontal plate, and a cutout portion 22 for receiving the coil is formed on the vertical plate except for a lower portion and both side portions, and the connection is made between upper ends of both side frames 23 and 23 of the vertical plate. A bracket 20 is formed to form a rectangular frame. Further, the horizontal plate at the lower end of the base metal 19 serves as a mounting portion 24 to the installation surface. Then, the side frames 23 and 23 and the lower frame 25 of the base metal fitting 19 arranged on one side of the frame body 1 are connected to the fastening bolts 21 to the corresponding parts arranged opposite to the other side together with the connecting metal fitting 20. attract. Finally, the reactor A is immersed in glue and dried to improve the insulation performance, and the gap between each part is filled to completely eliminate rattling.

A Reactor 1A, 1B Split frame body 2 Core coil with gap 3 Coil wire 3A Primary coil 3B Secondary coil 4 Support frame body 4A, 4B Side frame body 5 Gap 6 Core holding section 6A, 6B Split core holding section 7 Connecting section 8A Split spacer piece 9 Male engaging portion 10 Female engaging portion 11 Coil holding portion 12 Flange portion 13 Opening portion 14 Center hole 15 Arc surface 16 Square hole 17 Lead wire of primary coil,
18 Secondary coil lead wire,
19 Base bracket,
20 connecting bracket,
21 fastening bolts,
22 Notch,
23 side frame,
24 mounting part,
25 Lower frame.

Claims (8)

  After annealing a magnetic steel strip wound in a cylindrical shape a predetermined number of times, a pair of hollows that hold a gap-wound core that extends in the axial direction and forms a linearly continuous gap from the inner periphery side to the outer periphery side A synthetic resin comprising a cylindrical iron core holding portion, a pair of connecting portions for connecting the iron core holding portions at a predetermined interval, and spacer pieces integrally formed at appropriate positions on the outer peripheral surface of the iron core holding portion. The frame body is divided at the intermediate part between the two core holding parts and the spacer piece, and the two opposed pairs of divided core holding parts extrapolate the gap-wrapped iron core and use the spacer piece as a gap. In the inserted state, an engaging portion that can be connected to each other is provided at the end, and a coil holding portion for winding the coil wire is continuously formed on the outer side of both the connecting portions and inside the both iron core holding portions. Coil bobbin and wound iron for reactors Holder.   The frame is divided at the center of both the core holding portions and the spacer piece, and a male engaging portion is formed on one of the pair of divided core holding portions and the male engaging portion is engaged on the other. The reactor coil bobbin / winding iron core holder according to claim 1, wherein a mold engaging portion is formed, and both divided frame bodies have the same shape and are 180-degree rotationally symmetrical with each other.   At both ends of the iron core holding portion, a flange portion that is continuous with the connecting portion and protects an end portion of the wound core with gaps is integrally formed, and an opening that draws the coil wire into the center portion of the flange portion The reactor coil bobbin and wound iron core holder according to claim 1 or 2, wherein said part is formed.   The reactor coil bobbin and wound core holder according to any one of claims 1 to 3, wherein the spacer piece is integrally formed on the outer side or the inner side of the core holding part.   The spacer piece is formed continuously with the flange portion or the connecting portion, and is divided together with the iron core holding portion at the center to form a divided spacer piece, and the divided spacer pieces are butt-joined when the divided iron core holding portion is connected. The reactor coil bobbin and wound core holder according to 3 or 4, wherein   The reactor coil bobbin and wound core holder according to any one of claims 1 to 5, wherein the frame is formed of an electrically insulating and thermally conductive resin composition.   The reactor coil bobbin / winding iron core holder according to any one of claims 1 to 6, wherein the gap-wrapping iron core is extrapolated and held on both iron core holding portions of the frame, and the spacer piece is a gap. Insulate at least two sets of coil wires, each of which becomes a primary coil and a secondary coil, in coil holding parts formed continuously on the outside of both connecting parts of the frame and inside the iron core holding parts. A reactor characterized by being wound in a state.   The reactor according to claim 7, wherein the frame body is fastened and held in a direction in which the two divided frame bodies are engaged with each other by a metal support frame body, and the support frame body includes an attachment portion to an installation surface.

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