JP7699455B2 - Reactor - Google Patents

Description

The present invention relates to a reactor having a core and a coil.

A reactor is an electromagnetic component that converts electrical energy into magnetic energy and stores and releases it. Such reactors are used in a wide variety of applications. Representative reactors include boost reactors, series reactors, parallel reactors, current limiting reactors, starting reactors, shunt reactors, neutral point reactors, and arc suppression reactors.

Boost reactors are incorporated into on-board boost circuits, such as those used in the drive systems of hybrid and electric vehicles. Series reactors are connected in series to motor circuits to limit the current during short circuits. Parallel reactors stabilize the current sharing between parallel circuits. Current-limiting reactors limit the current during short circuits and are connected to them. Starting reactors are connected in series to motor circuits that protect the machine and limit the starting current. Shunt reactors are connected in parallel to transmission lines to compensate for leading reactive power and suppress abnormal voltages. Neutral point reactors are connected between the neutral point and the ground to limit the ground fault current that flows in the event of a ground fault in the power system. Arc-suppression reactors automatically extinguish the arc that occurs when a single-line ground fault occurs in a three-phase power system.

A reactor mainly consists of a coil and a core. When current is passed through the coil, it generates magnetic flux according to the number of turns. The core forms a closed magnetic circuit that passes the magnetic flux generated by the coil with a magnetic permeability higher than that of a vacuum. The core is covered with an insulating core coating resin to insulate it from the coil. The core and core coating resin are divided into multiple parts so that a wound coil can be attached, and are often used by connecting them together in a ring shape (see, for example, Patent Document 1).

Patent No. 6362904

The parts that make up the core coating resin are called split coating resins. When combining split coating resins of various shapes to make one core coating resin, a mold is required to mold the split coating resin for each shape of the split coating resin. If the number of molds increases, the production costs of the reactor will increase. For example, a fixture for fixing the core is sometimes formed in the split coating resin, but if the shape or material of the fixture changes for each split coating resin, a separate mold must be prepared, which increases the production costs of the reactor.

The present invention has been proposed to solve the above problems, and its purpose is to provide a reactor that can reduce production costs.

In order to achieve the above object, a reactor according to an embodiment of the present invention is a reactor having a coil and a core part to which the coil is attached, the core part has a core body including a magnetic material, a core coating resin that coats a part or all of the core body, and a fastener provided on the core coating resin to fix the core part, the fasteners are provided at least at four corners of the core coating resin, one set of fasteners arranged diagonally at one corner is a non-flexible fastener, and the other set of fasteners arranged diagonally at the other corner is a flexible fastener, and the shape of the core coating resin including the fasteners is a shape that is perpendicular to a plane including the four corners and is symmetrical with respect to an orthogonal axis passing through the center of the core part.

The core coating resin may be divided along a straight line that is perpendicular to the orthogonal axis and passes through the center of the core portion, and the fixing devices at the four corners may be arranged in pairs, with the divided coating resin having the same shape and size.

The core body may have a number of legs arranged in parallel to which the coil is attached, and a pair of yokes arranged separately at both ends of the legs, connecting the ends of the legs and defining the core body as a closed magnetic circuit, and the core coating resin may have a split coating resin that is split along the straight line that passes through the center of each of the legs.

The core body may have a number of legs arranged in parallel to each other and on which the coil is attached, and a pair of yokes arranged separately at both ends of the legs, connecting the ends of the legs and defining the core body as a closed magnetic circuit, and two of the fixing devices at each of the four corners may be arranged on either side of the center of gravity of each of the yokes.

The coil and the core may be housed in a support case to which the core is fixed via the fixing device.

According to the present invention, the number of molds required for the resin coating of the split core can be reduced, and the production costs of the reactor can be reduced.

FIG. FIG. FIG. FIG. 5A and 5B show a detailed configuration of a core portion, in which FIG. 5A is a perspective view of the core portion, and FIG. 5B is an exploded view of the core portion. 5A and 5B are diagrams showing analysis results of the degree of displacement at various points of a reactor, in which (a) is the reactor of this embodiment, and (b) is a reactor in which two inflexible fixing devices are simply arranged diagonally. 1A is a schematic diagram showing measurement points of the degree of displacement of a reactor, and FIG. 1B is a graph showing the degree of displacement at each measurement point of the reactor of this embodiment and a reactor in which two inflexible fixing devices are simply arranged diagonally. FIG. 13 is an enlarged perspective view showing another example of a flexible fixture.

The reactor according to the embodiment of the present invention will be described below with reference to the drawings. In each drawing, thickness, dimensions, positional relationships, ratios, shapes, etc. may be emphasized for ease of understanding, but the present invention is not limited to such emphasis.

Figure 1 is a perspective view showing the reactor of this embodiment. As shown in Figure 1, the reactor 1 has a reactor body 2 which is an assembly of a core part 4 and multiple coils 3. The multiple coils 3 are fitted side-by-side in one core part 4. When electricity is passed through the coil 3, it generates magnetic flux according to the number of turns. The core part 4 has a ring shape or a shape in which multiple ring shapes are connected together, and forms a closed magnetic circuit through which the magnetic flux generated by the coil 3 passes with a magnetic permeability higher than that of a vacuum. In other words, the reactor body 2 is an electromagnetic component that converts electrical energy into magnetic energy and stores and releases it.

As shown in FIG. 1, the reactor 1 includes a support case 9. The reactor body 2 is housed in the support case 9, into which a filler 8 such as an insulating resin is poured and solidified. The half of the reactor body 2 surrounded by the support case 9 is embedded in the solidified filler 8.

The support case 9 is a box with a bottom surrounded by side walls, with a rectangular internal space whose dimensions are matched to the size of the reactor body 2, and has an opening 91 with a width capable of housing the reactor body 2. Fixing portions 92 are formed at multiple locations on the edge of the opening 91. Fixing devices 5 are also provided extending from at least the four corners of the core portion 4 of the reactor body 2. When the reactor body 2 is housed in the support case 9, the core portion 4 is fixed to the fixing portions 92 via the fixing devices 5, thereby supporting the reactor body 2 within the support case 9.

In this type of reactor 1, the coil 3 is a wound body in which a conductive wire 31 such as a copper wire is wound into a cylindrical shape. The coil 3 is formed by winding the conductive wire 31 in a spiral shape while shifting the winding position for each turn along the winding axis. The conductive wire 31 is drawn out from the start and end of the coil 3. When a current flows through the conductive wire 31, the coil 3 generates a magnetic flux that runs along the winding axis.

As shown in FIG. 2, which is a top view of the core portion 4, the core portion 4 has an approximate θ shape with two closed rings connected together. One coil 3 is fitted into each of the three parallel-extending legs 43. The three legs 43 are connected by a pair of yoke portions 44 arranged separately on each end side of the legs 43. This approximate θ-shaped core portion 4 is perpendicular to a plane S including the four corners of the core portion 4 and is linearly symmetric, in other words, two-fold symmetric, with respect to an orthogonal axis 45 passing through the center of the core portion 4. Even if the core portion 4 is rotated 180 degrees around this orthogonal axis 45, the shape of the core portion 4 remains the same as before the rotation. The center of the core portion 4 is the intersection of two diagonals connecting the four corners of the core portion 4.

The fixtures 5 extend to the four corners of the core 4. The fixtures 5, 5 of each diagonal pair are also symmetrical with respect to the orthogonal axis 45. That is, the fixtures 5, 5 of each diagonal pair extend in positions and directions that are symmetrical with respect to the orthogonal axis 45, and are of the same shape, size, and type. For example, when one of a diagonally arranged pair of fixtures 5, 5 extends in a direction perpendicular to the extension direction of the leg 43, the other also extends in the opposite direction perpendicular to the leg 43. When one of a diagonally arranged pair of fixtures 5, 5 extends in a direction along the leg 43, the other also extends in the opposite direction along the leg 43.

More preferably, each of the two fixing devices 5 adjacent to each other through the yoke portion 44 extends in a direction perpendicular to the leg portion 43. In other words, each of the two fixing devices 5 adjacent to each other through the yoke portion 44 extends along the extension direction of the yoke portion 44. More specifically, each of the two fixing devices 5 adjacent to each other through the yoke portion 44 is arranged to face each other across the center of gravity of the yoke portion 44. With this arrangement, each of the two fixing devices 5 adjacent to each other through the yoke portion 44 can support the yoke portion 44 at its center of gravity, increasing the stability of the core portion 4 and making it difficult for the vibration direction of the reactor body 2 to become complicated.

Here, in this reactor 1, of the fixing devices 5 provided at the four corners, one set arranged at one diagonal is a rigid fixing device 51, and the other set arranged at the other diagonal is a flexible fixing device 52. Even with this, since the same type of fixing devices 5 are arranged at the diagonal, the core portion 4 including the fixing devices 5 is still linearly symmetrical with respect to the orthogonal axis 45. The rigid fixing device 51 has a material, shape, size, or two or more of these that are less prone to elastic deformation compared to the flexible fixing device 52, and conversely, the flexible fixing device 52 has a material, shape, size, or two or more of these that are more prone to elastic deformation compared to the rigid fixing device 51.

For example, as shown in FIG. 3, which is an enlarged view of the flexible fixing device 52, the flexible fixing device 52 is a metal fitting that protrudes like a tongue and is bent twice in a stepped shape from the base end to the tip. A bolt hole 521 is drilled at the tip of the flexible fixing device 52 for fastening it to the fixing part 92 of the support case 9 with a bolt.

The inflexible fixture 51 is a resin body. As shown in FIG. 4, which is an enlarged view of the inflexible fixture 51, the inflexible fixture 51 is a protrusion that extends outwardly and thicker than the flexible fixture 52. A ring-shaped metal collar 511 is embedded in the tip of the inflexible fixture 51 for fastening to the fixing portion 92 of the support case 9 with a bolt.

Returning to FIG. 2, the core section 4, which has a structure that is linearly symmetrical with respect to the orthogonal axis 45, extends perpendicular to the orthogonal axis 45 and is divided into two by a center line 46 that passes through the center of each of the three legs 43 in the extension direction, and is divided into an E-shaped split core section 47. This core section 4 is formed by butting together the two split core sections 47 and connecting them with an adhesive.

Figure 5 shows the detailed configuration of the core part 4, where (a) is a perspective view of the core part 4 and (b) is an exploded view of the core part 4. As shown in Figure 5, such a core part 4 comprises a core body 41 containing a magnetic material and a core coating resin 42 that coats the core body 41. The fixing device 5 extends into the core coating resin 42.

The magnetic material constituting the core body 41 may be, for example, a dust core, a ferrite core, a metal composite core, or a laminated steel plate. A dust core is made by annealing a powder compact made by compressing magnetic powder. Magnetic powders are mainly composed of iron, and examples of such materials include pure iron powder, permalloy (Fe-Ni alloy) mainly composed of iron, Si-containing iron alloy (Fe-Si alloy), sendust alloy (Fe-Si-Al alloy), amorphous alloy, nanocrystalline alloy powder, or a mixture of two or more of these powders. A metal composite core is made by kneading magnetic powder and resin and molding them.

The core coating resin 42 is a molded product that maintains a certain shape and has insulating and heat resistance. Materials for the core coating resin 42 include epoxy resin, unsaturated polyester resin, urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenyl Sulfide), PBT (Polybutylene Terephthalate), or a combination of these, and may contain a thermally conductive filler. This core coating resin 42 provides insulation between the core body 41 and the coil 3, and also protects the core body 41 from damage caused by physical impact from the outside.

The core coating resin 42 is divided into two roughly E-shaped divided coating resins 421 along the center line 46 to match the divided core portion 47. The divided coating resins 421 are, firstly, symmetrical with respect to the orthogonal axis 45, including the core portion 4 and the fixtures 5; secondly, although there are two types of fixtures 5, a non-flexible fixture 51 and a flexible fixture 52, the fixtures 5 arranged diagonally are of the same type; and thirdly, because they are divided along the center line 46 that is orthogonal to the orthogonal axis 45, they are of the same shape and size and are congruent in shape.

The core body 41 is divided into a core block 411 of the yoke portion 44 and a core block 411 of the leg portion 43, which extends from the end that abuts against the yoke portion 44 to the center line 46. In order to make the inner shape of the divided coating resin 421 a congruent shape of the same shape and size, the core blocks 411 of a pair of yoke portions 44 are of the same shape and size, and all of the core blocks 411 of the leg portion 43 are also of the same shape and size.

The split coating resin 421 is molded together with the inflexible fixing device 51 by placing the core block 411 of the yoke portion 44, the flexible fixing device 52, and the metal collar 511 in a mold as inserts and injecting resin into the mold. Therefore, if the split coating resin 421 has a congruent shape with the same shape and size, only one type of mold is sufficient. This reduces the number of molds required to manufacture the reactor 1, and the production cost of the reactor 1 can be reduced.

The core block 411 of the leg portion 43 is inserted into the divided coating resin 421 and bonded to the core block 411 of the yoke portion 44 after the divided coating resin 421 is molded with the core block 411 of the yoke portion 44 as an insert item. When only the core block 411 of the yoke portion 44 is molded integrally with the fixture 5 in this manner, the manufacturing precision of the fixture 5 sandwiching the center of gravity of the yoke portion 44 is improved, and the stability of the core portion 4 is further improved. However, the core block 411 of the leg portion 43 may also be molded integrally by placing it in a mold as an insert item.

In this four-point fixed reactor 1 of the present embodiment, in which rigid fixtures 51 are arranged on one diagonal and flexible fixtures 52 are arranged on the other diagonal, a weight equivalent to the weight of the coil 3 was added to one surface of all legs 43 facing the same direction, and all fixtures 5 were used to fix the reactor, and the degree of displacement at each point was analyzed. The degree of displacement is a value that indicates the ease of resonance when vibrated, with a larger value indicating that resonance occurs more easily and a smaller value indicating that resonance occurs less easily. As a comparison, a two-point fixed reactor in which rigid fixtures 51 are arranged on one diagonal and no fixtures 5 are arranged on the other diagonal was used, and the degree of change at each point was analyzed using the same measurement method and measurement conditions as in this embodiment.

Figure 6 is a displacement distribution diagram showing the analysis results of the degree of displacement at each point of the reactor body 2 fixed with the fixing device 5, where (a) is the analysis result of the reactor body 2 fixed at four points of this embodiment, and (b) is the analysis result of the reactor body fixed at two points for comparison. Also, Figure 7 (a) is a schematic diagram showing five measurement points arranged at equal positions including the corners and the center along the diagonal line along which the flexible fixing devices 52 of the reactor body 2 fixed at four points of this embodiment are arranged, and along the diagonal line along which the fixing devices 5 of the reactor body fixed at two points are not present, and (b) is a graph showing the degree of displacement at the five measurement points.

According to the results of the displacement analysis, as shown in Figures 6 and 7, the degree of displacement increases along the diagonal line where the flexible fixing devices 52 are arranged and along the diagonal line where there are no fixing devices 5, in both the four-point fixed reactor body 2 of this embodiment and the two-point fixed reactor body, the further away from the center. However, it can be confirmed that the four-point fixed reactor body 2 of this embodiment has a smaller degree of displacement than the two-point fixed reactor body.

By arranging the fixing device 5 only on one diagonal and using the same type of inflexible fixing device 51 for that fixing device 5, the core part 4 can have a shape that is linearly symmetrical about the orthogonal axis 45, even for a reactor with two-point fixing, and the number of molds can be reduced. However, by arranging the inflexible fixing devices 51 on one diagonal corner of the four corners and the flexible fixing devices 52 on the other diagonal, and making the core part 4, including the fixing devices 5, linearly symmetrical about the orthogonal axis 45, it is possible not only to reduce the number of molds and lower production costs, but also to suppress vibration of the reactor body 2.

In order to reduce the number of molds and suppress vibration of the reactor body 2, all four corners can be made of inflexible fixtures 51. However, if all four corners are made of inflexible fixtures 51, there will be greater variation in the position of each inflexible fixture 51 due to manufacturing errors, and large stresses may be concentrated in some of the inflexible fixtures 51 fastened to the fixing portion 92. If this happens, the inflexible fixtures 51 that are subjected to large stresses will become brittle over time and break, which may shorten the product lifespan.

On the other hand, in a reactor 1 in which rigid fixtures 51 are arranged at one diagonal corner and flexible fixtures 52 are arranged at the other diagonal corner, the flexible fixtures 52 deform to absorb variations in the position of fixtures 5 due to manufacturing errors, so stress concentration on the rigid fixtures 51 can be suppressed, and the product life can be extended.

In addition, to reduce the number of molds and suppress vibration of the reactor body 2, all four corners can be made of flexible fixing devices 52. However, if all four corners are made of flexible fixing devices 52, the high elasticity of the flexible fixing devices 52 will cause the reactor body 2 to vibrate more and the vibration will be harder to attenuate. This could cause the flexible fixing devices 52 to become brittle over time due to metal fatigue, etc., leading to the risk of being destroyed and the product lifespan being shortened.

On the other hand, in a reactor 1 in which non-flexible fixtures 51 are arranged at one diagonal corner of the four corners and flexible fixtures 52 are arranged at the other diagonal corner, the vibration of the reactor body 2 is suppressed, so the load on the flexible fixtures 52 is reduced, and the product life can be extended.

As described above, the reactor 1 has a coil 3 and a core part 4 to which the coil 3 is attached. The core part 4 has a core body 41 containing a magnetic material, a core coating resin 42 that coats the core body 41, and a fixture 5 provided on the core coating resin 42 to fix the core part 4. The fixtures 5 are provided at the four corners of the core coating resin 42, and among the fixtures 5 at the four corners, one set arranged diagonally is a non-flexible fixture 51, and the other set arranged diagonally is a flexible fixture 52. The shape of the core coating resin 42 including the fixtures 5 is perpendicular to the plane S including the four corners and is linearly symmetrical with respect to an orthogonal axis 45 passing through the center of the core part 4.

As a result, the split coating resin 421 that divides the core coating resin 42 into two has a congruent shape of the same shape and size, and the two split coating resins 421 can be produced using one type of mold. This reduces the production cost of the reactor. Furthermore, vibration can be suppressed compared to a reactor in which the fasteners 5 are arranged only on one diagonal, and the load on the fasteners 5 is smaller and the product life is increased compared to a reactor in which all fasteners 5 are inflexible fasteners 51 or flexible fasteners 52.

In this embodiment, the entire periphery of the core body 41 is covered with the core coating resin 42, but a portion of the core body 41 may be covered with the core coating resin 42 and a portion of the core body 41 may be exposed from the standpoint of heat dissipation, etc. This also reduces the number of molds for the split coating resin 421, suppresses vibration of the reactor 1, reduces the load on the fixing device 5, and improves the product life.

Regarding the fasteners 5 at the four corners, when the core portion 4 is circular, one of the four corners is determined at a location on the circumference, and the other three locations are determined at 90 degree intervals from the determined location, and the fasteners 5 are placed at the four determined locations. When the core portion 4 is elliptical, the four corners are determined at the intersections of the diagonals of an imaginary rectangle circumscribing the core portion 4 and the outer periphery of the core portion 4, and the fasteners 5 are placed at the four determined locations. Furthermore, the fasteners 5 are not limited to the four corners. If a pair of fasteners 5 of the same shape and size can be placed at the same distance on either side of the orthogonal axis 45, the number of fasteners 5 may be increased, for example by placing another fastener 5 at the center position of the yoke portion 44.

The core portion 4 may be not only roughly θ-shaped with three legs 43, but also one ring shape with two legs 43, or a shape with four legs 43 and three ring shapes connected together. That is, the core portion 4 may be one or more ring shapes connected together to form a closed magnetic circuit. The coil 3 may be fitted into all the legs 43, or may be fitted into one or more parts of the legs 43.

As long as the core part 4 is divided so that the inflexible fixing device 51 and the flexible fixing device 52 arranged at the four corners are arranged one by one in the divided coating resin 421, the embodiment is not limited to the embodiment divided along the center line 46. Even if the core part 4 is divided into two along a virtual line other than the center line 46 perpendicular to the orthogonal axis 45, the divided coating resin 421 will have a congruent shape of the same shape and size. For example, the core part 4 may be a single ring shape having two legs 43, and the divided core part 47, the core block 411, and the core coating resin 42 may be J-shaped. The core part 4 and the core coating resin 42 are formed by facing the two J shapes so that the short end and the long end are butted against each other, and each has a congruent shape of the same shape and size.

Furthermore, the number of divisions of the core part 4 is not limited to two, and may be three or four, as long as the divisions are of the same shape and size with the center line 46 as the boundary. For example, the division lines are two lines that are the same distance away from the center line 46 on both sides of the extension direction of the leg part 43 and parallel to the center line 46. If the core part 4 is roughly θ-shaped, the core part 4 is divided into an E-shaped divided core part 47 including a yoke part 44 and a part of the leg part 43 remaining short, and a divided core part 47 corresponding to the leg part 43. The pair of E-shaped divided core parts 47 are of the same shape and size and the divided coating resin 421 provided on the E-shaped divided core part 47 also have the same shape and size and congruent shapes, so the number of molds can be reduced.

For example, two lines passing through the base of the leg 43 and parallel to the center line 46 are set as the dividing lines. If the core portion 4 is roughly θ-shaped, the core portion 4 is divided into a linear divided core portion 47 having only the yoke portion 44 and a divided core portion 47 corresponding to the leg 43. The pair of divided core portions 47 having only the yoke portion 44 are of the same shape and size and congruent shape, and the divided coating resin 421 provided on this divided core portion 47 also has the same shape and size and congruent shape, which reduces the number of molds.

Although metal fittings have been exemplified as the flexible fixing device 52, resin bodies that have acquired high elasticity due to their shape and dimensions are also included in the flexible fixing device 52. Figure 8 is an enlarged perspective view showing another example of the flexible fixing device 52. For example, as shown in Figure 8, the flexible fixing device 52 may be a resin flexible fixing device 53 that is integrated with the divided resin covering 421.

This resin flexible fixture 53 is elongated compared to the inflexible fixture 51 which is also integrally molded with the divided coating resin 421. The resin flexible fixture 53 protrudes from the divided coating resin 421 parallel to the plane on which the legs 43 are arranged, and bends midway in a direction perpendicular to the plane on which the legs 43 are arranged. At the tip of the extension end of the resin flexible fixture 53, it bends again and extends parallel to the plane on which the legs 43 are arranged. The resin flexible fixture 53 has high elasticity due to its elongated dimensions and bent shape, and functions as the flexible fixture 52. Note that a metal fitting may be inserted inside the resin flexible fixture 53 as an insert.

Furthermore, two of the fixing devices 5 at each of the four corners are arranged on either side of the center of gravity of each yoke portion 44. This allows the fixing devices 5 to support the yoke portion 44 at its center of gravity, increasing the stability of the core portion 4 and preventing the vibration direction of the reactor body 2 from becoming complicated.

The reactor body 2 is housed in the support case 9, and the fixing device 5 is fixed to the fixing portion 92 of the support case 9, but the fixing device 5 is not limited to this. For example, the fixing device 5 may be fixed to an external fastening point such as a bracket installed near the circuit in which the reactor body 2 is mounted. In this case, the support case 9 for housing the reactor body 2 is not essential.

These embodiments are presented as examples, and the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. The embodiments and their modifications are included in the scope of the present invention.

REFERENCE SIGNS LIST 1 Reactor 2 Reactor body 3 Coil 31 Conductive wire 4 Core portion 41 Core body 411 Core block 42 Core coating resin 421 Split coating resin 43 Leg portion 44 Yoke portion 45 Orthogonal axis 46 Center line 47 Split core portion 5 Fixing device 51 Inflexible fixing device 511 Metal collar 52 Flexible fixing device 521 Bolt hole 53 Flexible resin fixing device 8 Filler 9 Support case 91 Opening 92 Fixing portion

Claims (5)

A reactor having a coil and a core portion to which the coil is attached,
The core portion includes a core body including a magnetic substance, a core coating resin that coats a part or the whole of the core body, and a fastener that is provided on the core coating resin to fix the core portion,
The fasteners are provided at least at four corners of the core coating resin,
Among the fasteners at the four corners, a pair of fasteners arranged diagonally at one corner are inflexible fasteners, and another pair of fasteners arranged diagonally at the other corner are flexible fasteners,
the core coating resin has a shape including the fastener that is perpendicular to a plane including the four corners and is symmetrical with respect to an orthogonal axis passing through the center of the core portion;
A reactor characterized by the above. the core coating resin is divided along a straight line passing through the center of the core portion perpendicular to the orthogonal axis, and the fixing devices at the four corners are arranged in pairs on each divided coating resin;
The divided coating resins have the same shape and size;
The reactor according to claim 1 . The core body is
A plurality of legs arranged in parallel to each other and to which the coil is attached;
a pair of yoke portions disposed separately at both ends of the plurality of legs, connecting the ends of the plurality of legs and defining the core body as a closed magnetic circuit;
having
the core coating resin has divided coating resins that are divided along the straight line that passes through the centers of the plurality of legs;
The reactor according to claim 2 . The core body is
A plurality of legs arranged in parallel to each other and to which the coil is attached;
a pair of yoke portions disposed separately at both ends of the plurality of legs, connecting the ends of the plurality of legs and defining the core body as a closed magnetic circuit;
having
Two of the fasteners at each of the four corners are disposed on either side of the center of gravity of each of the yoke portions;
The reactor according to claim 1 or 2, a support case that houses the coil and the core portion and to which the core portion is fixed via the fixing device;
The reactor according to any one of claims 1 to 4,

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