Reactor

Abstract

To provide a reactor which can suppress production cost.SOLUTION: A reactor 1 has coils 3 and core parts 4 mounted with the coils 3. The core part 4 has a core body 41 including a magnetic body, a core coating resin 42 coating the core body 41, and fixtures 5 provided on the core coating resin 42 so as to fix the core part 4. As for the fixtures 5, among four corners of fixtures 5 provided at the four corners of the core coating resins 42, one set of fixtures aligned on one diagonal are defined by inflexible fixtures 51, and the other set of fixtures aligned on the other diagonal are defined by flexible fixtures 52. In addition, the core coating resin 42 is configured so that a shape of the core coating resin 42 including the fixtures 5 is orthogonal to a plane including the four corners, and a shape line symmetric to an orthogonal axis 45 passing through a center of the core part 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a reactor including a core and a coil.

Background Art

[0002] A reactor is an electromagnetic component that converts electrical energy into magnetic energy for storage and release. Such reactors are used in a wide variety of applications. Representative reactors include step-up reactors, series reactors, parallel reactors, current-limiting reactors, starting reactors, shunt reactors, neutral point reactors, and arc-extinguishing reactors.

[0003] The step-up reactor is incorporated into an in-vehicle step-up circuit such as a drive system of a hybrid vehicle or an electric vehicle. The series reactor is connected in series to an electric motor circuit to limit the current during a short circuit. The parallel reactor stabilizes the current sharing between parallel circuits. The current-limiting reactor limits the current during a short circuit and is connected thereto. The starting reactor is connected in series to an electric motor circuit that protects a machine to limit the starting current. The shunt reactor is connected in parallel to a transmission line to compensate for leading reactive power and suppress abnormal voltages. The neutral point reactor is used to connect between the neutral point and the ground to limit the ground fault current flowing during a ground fault accident in the power system. The arc-extinguishing reactor automatically extinguishes the arc generated during a single-line-to-ground fault in a three-phase power system.

[0004] A reactor mainly consists of a coil and a core. The coil generates magnetic flux according to the number of turns when energized. The core forms a closed magnetic path that passes the magnetic flux generated by the coil according to a permeability higher than that of vacuum. The core is coated with an insulating core coating resin to insulate it from the coil. The core and the core coating resin are divided into a plurality of parts so that the wound coil can be mounted, and are often used by connecting them annularly (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The parts constituting the core coating resin are called divided coating resins. When one core coating resin is constituted by combining divided coating resins of various shapes, a mold for molding the divided coating resin is required for each shape of the divided coating resin. As the number of molds increases, the production cost of the reactor increases. For example, a fixture for fixing the core may be formed on the divided coating resin, but only the shape and material of the fixture change for each divided coating resin, and separate molds must be prepared, resulting in an increase in the production cost of the reactor.

[0007] The present invention has been proposed to solve the above problems, and an object thereof is to provide a reactor capable of suppressing production costs.

Means for Solving the Problems

[0008] To achieve the above object, a reactor according to an embodiment of the present invention is a reactor having a coil and a core portion on which the coil is mounted, wherein the core portion includes a core body containing a magnetic material, a core coating resin covering a part or all of the core body, and a fixture provided on the core coating resin for fixing the core portion, the fixture is provided at at least four corners of the core coating resin, and among the fixtures at the four corners, one set arranged diagonally is an inflexible fixture, and the other set arranged diagonally is a flexible fixture, and the shape of the core coating resin including the fixture is symmetric with respect to an orthogonal axis passing through the center of the core portion and orthogonal to a plane including the four corners.

[0009] The core coating resin has a divided coating resin that is divided by a straight line passing through the center of the core portion perpendicular to the orthogonal axis, and the four corner fixtures are arranged in two divided groups. The divided coating resins may be of the same shape and size.

[0010] The core body has a plurality of legs arranged in parallel on which the coil is mounted, and a pair of yoke portions that are divided and arranged at both ends of the plurality of legs, connect the ends of the plurality of legs, and define the core body as a closed magnetic circuit. The core coating resin may have the divided coating resin divided by the straight line passing through the center of each of the plurality of legs.

[0011] The core body has a plurality of legs arranged in parallel on which the coil is mounted, and a pair of yoke portions that are divided and arranged at both ends of the plurality of legs, connect the ends of the plurality of legs, and define the core body as a closed magnetic circuit. Each two of the four corner fixtures may be arranged sandwiching the center of gravity of each yoke portion.

[0012] A support case that houses the coil and the core portion and fixes the core portion via the fixture may be provided.

Advantages of the Invention

[0013] According to the present invention, the number of molds for the divided core coating resin can be reduced, and the production cost of the reactor can be suppressed.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0015] Hereinafter, with reference to the drawings, the reactor of the embodiment of the present invention will be described. In each drawing, for ease of understanding, the thickness, dimensions, positional relationship, ratio, shape, etc. may be emphasized and shown, and the present invention is not limited to those emphases.

[0016] FIG. 1 is a perspective view showing the reactor of this embodiment. As shown in FIG. 1, the reactor 1 includes a core portion 4 and a reactor main body 2 which is an assembly of a plurality of coils 3. The plurality of coils 3 are horizontally arranged and fitted on one core portion 4. The coil 3 generates magnetic flux according to the number of turns by energization. The core portion 4 has a shape of one annular shape or a plurality of annular shapes connected in series, and forms a closed magnetic path through which the magnetic flux generated by the coil 3 passes according to a higher magnetic permeability than that of vacuum. That is, the reactor main body 2 is an electromagnetic component that converts electrical energy into magnetic energy and stores and releases it.

[0017] Also, as shown in FIG. 1, the reactor 1 includes a support case 9. Inside the support case 9, after the reactor main body 2 is accommodated, a filler 8 such as an insulating resin is poured and solidified. The reactor main body 2 is embedded in the solidified filler 8 with the half body portion surrounded by the support case 9.

[0018] This support case 9 is a bottomed box with side walls surrounding it on all four sides. The internal space is rectangular, and its dimensions are adapted to the size of the reactor body 2, and it has an opening 91 in the frontage that can accommodate the reactor body 2. Fixing parts 92 are formed at multiple locations on the edge of the opening 91. At least at the four corners of the core part 4 of the reactor body 2, fixtures 5 also extend. When the reactor body 2 is accommodated in the support case 9, the core part 4 is fixed to the fixing part 92 via the fixtures 5, so that the reactor body 2 is supported within the support case 9.

[0019] In such a reactor 1, the coil 3 is a wound body formed by winding a conductive wire 31 such as a copper wire in a cylindrical shape. The coil 3 is formed by winding the conductive wire 31 in a spiral shape while shifting the winding position by one turn along the winding axis. The conductive wire 31 is drawn out from the start and end of the winding of the coil 3. An electric current flows through the coil 3 via this conductive wire 31, generating a magnetic flux that penetrates along the winding axis.

[0020] As shown in FIG. 2, which is a top view of the core part 4, the core part 4 has a schematic θ shape formed by connecting, for example, two closed loops. One coil 3 is fitted into each of the three legs 43 that extend in parallel. The three legs 43 are connected by a pair of yoke parts 44 that are arranged separately on each end side of the legs 43. This schematic θ-shaped core part 4 is orthogonal to the plane S including the four corners of the core part 4 and is line-symmetric, in other words, two-fold symmetric, with respect to the orthogonal axis 45 passing through the center of the core part 4. Even when rotated 180 degrees around this orthogonal axis 45, the shape of the core part 4 does not change from before the rotation. Incidentally, the center of the core part 4 is the intersection of the two diagonal lines connecting the four corners of the core part 4.

[0021] The fixture 5 extends to the four corners of such a core portion 4. Each pair of fixtures 5, 5 arranged diagonally is also line-symmetric with respect to the orthogonal axis 45. That is, each pair of fixtures 5, 5 arranged diagonally extends in positions and directions that are line-symmetric with respect to the orthogonal axis 45, are of the same shape and size, and are also made of the same type. For example, when one of a pair of fixtures 5, 5 arranged diagonally extends in a direction orthogonal to the extending direction of the leg portion 43, the other also extends in the opposite direction orthogonal to the leg portion 43. When one of a pair of fixtures 5, 5 arranged diagonally extends in a direction along the leg portion 43, the other also extends in the opposite direction along the leg portion 43.

[0022] More preferably, each two adjacent fixtures 5 via the yoke portion 44 extend in a direction orthogonal to the leg portion 43. In other words, each two adjacent fixtures 5 via the yoke portion 44 extend along the extending direction of the yoke portion 44. More specifically, each two adjacent fixtures 5 via the yoke portion 44 are arranged so as to face each other with the center of gravity of the yoke portion 44 interposed therebetween. With this arrangement, each two adjacent fixtures 5 via the yoke portion 44 can support the yoke portion 44 at the center of gravity, enhancing the stability of the core portion 4 and also making it difficult for the vibration direction of the reactor body 2 to become complicated.

[0023] Here, in this reactor 1, among the fixtures 5 provided at the four corners, one pair arranged diagonally is the inflexible fixture 51, and the other pair arranged diagonally is the flexible fixture 52. Also by this, since the same type of fixtures 5 are arranged diagonally, there is no change in the fact that the core portion 4 including the fixtures 5 is line-symmetric with respect to the orthogonal axis 45. The inflexible fixture 51 has a material, shape, dimensions, or two or more of these that are less elastic than those of the flexible fixture 52. Conversely, the flexible fixture 52 has a material, shape, dimensions, or two or more of these that are more elastic than those of the inflexible fixture 51.

[0024] For example, as shown in FIG. 3 which is an enlarged view of the flexible fixture 52, the flexible fixture 52 is a metal fitting protruding in a tongue shape and is bent twice in a stepped manner from the base end to the tip end. A bolt hole 521 for fastening to the fixing portion 92 of the support case 9 with a bolt is formed at the tip end of the flexible fixture 52.

[0025] The inflexible fixture 51 is a resin body. As shown in FIG. 4 which is an enlarged view of the inflexible fixture 51, this inflexible fixture 51 is a protrusion that extends thicker and thicker than the flexible fixture 52. At the tip of the inflexible fixture 51, a ring-shaped metal collar 511 for fastening to the fixing portion 92 of the support case 9 with bolts is embedded.

[0026] Returning to FIG. 2, the core portion 4 having a structure that is line-symmetric with respect to such an orthogonal axis 45 extends orthogonally to the orthogonal axis 45 and is divided into two by a center line 46 passing through the center of each extending direction of the three legs 43, and is divided into an E-shaped divided core portion 47. This core portion 4 is formed by butting together both divided core portions 47 and connecting them with an adhesive.

[0027] FIG. 5 is a diagram showing the detailed configuration of the core portion 4, (a) is a perspective view of the core portion 4, and (b) is an exploded view of the core portion 4. As shown in FIG. 5, such a core portion 4 includes a core body 41 containing a magnetic material and a core coating resin 42 covering the core body 41. The fixture 5 extends to the core coating resin 42.

[0028] The magnetic material constituting the core body 41 is, for example, a dust core, a ferrite core, a metal composite core, a laminated steel sheet, or the like. The dust core is formed by annealing a dust molded body obtained by compacting magnetic powder. The magnetic powder has iron as the main component, and examples include pure iron powder, permalloy (Fe-Ni alloy) having iron as the main component, Si-containing iron alloy (Fe-Si alloy), sendust alloy (Fe-Si-Al alloy), amorphous alloy, nanocrystalline alloy powder, or a mixed powder of two or more of these powders. The metal composite core is formed by kneading and molding magnetic powder and resin.

[0029] The core coating resin 42 is a molded product that maintains a certain shape and has insulation and heat resistance. Examples of the material of the core coating resin 42 include epoxy resin, unsaturated polyester resin, urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulfide), PBT (Polybutylene Terephthalate), or a composite thereof, and a filler with thermal conductivity may be mixed therein. With this core coating resin 42, insulation is achieved between the core body 41 and the coil 3, and the core body 41 is protected from being damaged by physical impacts from the outside.

[0030] And the core coating resin 42 is divided into two split coating resins 421 in a substantially E shape with the center line 46 as a boundary according to the split core portion 47. The split coating resin 421 is, firstly, symmetric with respect to the orthogonal axis 45 including the fixture 5 for the core portion 4, secondly, there are two types of fixtures 5 in the fixture 5, namely, an inflexible fixture 51 and a flexible fixture 52, and the fixtures 5 arranged in the same diagonal are of the same type, and thirdly, by being divided by the center line 46 orthogonal to the orthogonal axis 45, they have the same shape and size and are congruent.

[0031] Regarding the core body 41, it is divided into core blocks 411 of the yoke portion 44 and core blocks 411 from the end portion of the leg portion 43 that abuts against the yoke portion 44 to the center line 46. In order for the inner shape of the split coating resin 421 to also have the same shape and size and be congruent, the core blocks 411 of the pair of yoke portions 44 have the same shape and size and are congruent, and all the core blocks 411 of the leg portion 43 also have the same shape and size and are congruent.

[0032] This split coating resin 421 is molded together with the inflexible fixture 51 by placing the core block 411 of the yoke portion 44, the flexible fixture 52, and the metal collar 511 in the mold as inserts and injecting resin into the mold. Therefore, if the split coating resins 421 have the same shape and size and are congruent, one type of mold is sufficient. Then, the number of molds for manufacturing the reactor 1 is reduced, and the production cost of the reactor 1 can be reduced.

[0033] Still, the core block 411 of the leg portion 43 is inserted into the divided coating resin 421 after molding the divided coating resin 421 with the core block 411 of the yoke portion 44 as an insert, and is adhered to the core block 411 of the yoke portion 44. When only the core block 411 of the yoke portion 44 is integrally molded with the fixture 5 in this way, the manufacturing accuracy of sandwiching the center of gravity of the yoke portion 44 with the fixture 5 is improved, and the stability of the core portion 4 is further enhanced. However, the core block 411 of the leg portion 43 may also be housed in the mold as an insert and integrally molded.

[0034] In such a reactor 1 with four-point fixation of the present embodiment in which the inflexible fixtures 51 are arranged on one diagonal and the flexible fixtures 52 are arranged on the other diagonal, a weight corresponding to the weight of the coil 3 is added to one surface of all the leg portions 43 facing the same direction, fixed using all the fixtures 5, and the degree of displacement at each location was analyzed. The degree of displacement is a value representing the ease of resonance when vibrated. The larger the value, the easier it is to resonate, and the smaller the value, the more difficult it is to resonate. Also, as a comparison target, using a reactor with two-point fixation in which the inflexible fixtures 51 are arranged on one diagonal and no fixture 5 is arranged on the other diagonal, the degree of change at each location was analyzed under the same measurement method and measurement conditions as in the present embodiment.

[0035] FIG. 6 is a displacement distribution diagram showing the analysis results of the degree of displacement at various locations of the reactor body 2 fixed by the fixtures 5. (a) is the analysis result of the reactor body 2 with four-point fixation of the present embodiment, and (b) is the analysis result of the reactor body with two-point fixation as the comparison target. Also, FIG. 7(a) is a schematic diagram showing five measurement points arranged at equal positions including the corners and the center along the diagonal where the flexible fixtures 52 of the reactor body 2 with four-point fixation of the present embodiment are arranged, and along the diagonal where there is no fixture 5 of the reactor body with two-point fixation, and (b) is a graph showing the degree of displacement at the five measurement points.

[0036] According to the analysis results of the displacement, as shown in FIGS. 6 and 7, for both the four-point fixed reactor body 2 and the two-point fixed reactor body of the present embodiment, along the diagonal line where the flexible fixtures 52 are arranged and along the diagonal line without the fixture 5, the degree of displacement increases as the distance from the center increases. However, it can be confirmed that the degree of displacement of the four-point fixed reactor body 2 of the present embodiment is smaller than that of the two-point fixed reactor body.

[0037] By arranging the fixture 5 only on one diagonal and making the fixture 5 the same type of inflexible fixture 51, for the two-point fixed reactor, the core part 4 also has a shape that is line-symmetrical with respect to the orthogonal axis 45, and the number of molds can be reduced. However, by arranging the inflexible fixtures 51 on one diagonal of the four corners and the flexible fixtures 52 on the other diagonal, and making the core part 4 including the fixture 5 line-symmetrical with respect to the orthogonal axis 45, not only can the number of molds be reduced and the production cost be lowered, but also the vibration of the reactor body 2 can be suppressed.

[0038] In order to reduce the number of molds and suppress the vibration of the reactor body 2, all four corners can also be made of inflexible fixtures 51. However, if all four corners are made of inflexible fixtures 51, the variation in the positions of the individual inflexible fixtures 51 due to manufacturing errors becomes large, and a large stress can concentrate on a part of the inflexible fixtures 51 fastened to the fixing part 92. Then, the inflexible fixtures 51 to which a large stress is applied may become brittle over time and be destroyed, and there is a risk that the product life will be shortened.

[0039] On the other hand, for the reactor 1 in which the inflexible fixtures 51 are arranged on one diagonal of the four corners and the flexible fixtures 52 are arranged on the other diagonal, since the flexible fixtures 52 are deformed to absorb the variation in the position of the fixture 5 due to manufacturing errors, it is possible to suppress the concentration of stress on the inflexible fixtures 51 and extend the product life.

[0040] Also, in order to reduce the number of molds and suppress the vibration of the reactor body 2, all four corners can be made of flexible fixtures 52. However, if all four corners are made of flexible fixtures 52, due to the height of the elasticity of the flexible fixtures 52, the vibration of the reactor body 2 will increase and it will be difficult for the vibration to decay. Then, the flexible fixtures 52 may become brittle and break over time due to metal fatigue or the like, and there is a risk that the product life will be shortened.

[0041] On the other hand, in the reactor 1 where the inflexible fixtures 51 are arranged on one diagonal of the four corners and the flexible fixtures 52 are arranged on the other diagonal, since the vibration of the reactor body 2 is suppressed, the load on the flexible fixtures 52 is reduced, and the product life can be extended.

[0042] As described above, the reactor 1 has a coil 3 and a core portion 4 to which the coil 3 is attached. The core portion 4 includes a core body 41 containing a magnetic material, a core coating resin 42 covering the core body 41, and a fixture 5 provided on the core coating resin 42 for fixing the core portion 4. And the fixture 5 is provided at the four corners of the core coating resin 42. Among the fixtures 5 at the four corners, one set arranged on one diagonal is the inflexible fixture 51, and the other set arranged on the other diagonal is the flexible fixture 52. Also, the core coating resin 42 is shaped such that the shape of the core coating resin 42 including the fixture 5 is symmetric with respect to an orthogonal axis 45 that is orthogonal to the plane S including the four corners and passes through the center of the core portion 4.

[0043] As a result, the divided coating resins 421 that divide the core coating resin 42 into two have the same shape and size, and the two divided coating resins 421 can be produced using one type of mold. Therefore, the production cost of the reactor can be suppressed. Moreover, the vibration can be suppressed compared to a reactor in which the fixtures 5 are arranged only on one diagonal, and the load on the fixtures 5 is reduced and the product life is increased compared to a reactor in which all the fixtures 5 are inflexible fixtures 51 or flexible fixtures 52.

[0044] Here, in the present embodiment, although the entire periphery of the core body 41 is covered with the core coating resin 42, a part of the core body 41 may be covered with the core coating resin 42 and a part of the core body 41 may be exposed from the viewpoint of heat dissipation or the like. Also by doing so, the number of molds for the divided coating resin 421 can be reduced, the vibration of the reactor 1 can be suppressed, the load on the fixture 5 can be reduced, and the product life can be improved.

[0045] Regarding the fixtures 5 at the four corners, when the core portion 4 is circular, one of the four corners is determined at one point on the circumference, and the other three points are determined at 90-degree intervals from the determined point, and the fixtures 5 may be arranged at the determined four points. When the core portion 4 is elliptical, the four corners are determined at the intersections of the diagonals of the virtual rectangle circumscribing the core portion 4 and the outer periphery of the core portion 4, and the fixtures 5 may be arranged at the determined four points. Further, the fixtures 5 are not limited to the four corners. If a pair of identical and same-sized fixtures 5 can be arranged at the same distance across the orthogonal axis 45, the number of fixtures 5 may be increased, for example, by installing another fixture 5 at the center position of the yoke portion 44.

[0046] The core portion 4 may not only have a substantially θ shape having three legs 43, but also may have a single annular shape having two legs 43, or may have four legs 43 and a shape in which three annular shapes are connected. That is, the core portion 4 only needs to form a closed magnetic circuit with one or more connected annular shapes. Further, the coil 3 may be fitted to all the legs 43, or may be fitted to one or more of the legs 43.

[0047] If the core part 4 is divided so that one inflexible fixture 51 and one flexible fixture 52, which are arranged at the four corners, are arranged in the divided coating resin 421 one by one, it is not limited to the mode of dividing by the center line 46. Even if the core part 4 is divided into two by a virtual line different from the center line 46 orthogonal to the orthogonal axis 45, the divided coating resins 421 will have the same shape and the same size and be congruent. For example, the core part 4 may be in a single annular 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. By facing the two J-shapes so that the short end and the long end are butted against each other, the core part 4 and the core coating resin 42 are formed, and each has the same shape and the same size and is congruent.

[0048] Furthermore, as long as they have the same shape and the same size and are congruent with each other with the center line 46 as the boundary, the number of divisions of the core part 4 is not limited to two, and it may be divided into three or four. For example, at the same distance from the center line 46 to both sides in the extending direction of the leg 43, two lines parallel to the center line 46 are used as dividing lines. If the core part 4 is generally θ-shaped, the core part 4 is divided into a divided core part 47 in an E-shape including the yoke part 44 and having a part of the leg 43 remaining short, and a divided core part 47 corresponding to the leg 43. The pair of E-shaped divided core parts 47 have the same shape and the same size and are congruent, and the divided coating resins 421 provided in the E-shaped divided core parts 47 also have the same shape and the same size and are congruent, so that the number of molds can be reduced.

[0049] Also, for example, two lines parallel to the center line 46 passing through the base of the leg 43 are used as dividing lines. If the core part 4 is generally θ-shaped, the core part 4 is divided into a linear divided core part 47 only of the yoke part 44 and a divided core part 47 corresponding to the leg 43. The pair of divided core parts 47 only of the yoke part 44 have the same shape and the same size and are congruent, and the divided coating resins 421 provided in this divided core part 47 also have the same shape and the same size and are congruent, so that the number of molds can be reduced.

[0050] Although a metal fitting has been exemplified as the flexible fixture 52, a resin body that has obtained high elasticity depending on its shape and dimensions is also included in the flexible fixture 52. FIG. 8 is an enlarged perspective view showing another example of the flexible fixture 52. For example, as shown in FIG. 8, the flexible fixture 52 may be a resin-made flexible fixture 53 integrated with the divided coating resin 421.

[0051] This resin flexible fixture 53 is slender compared to the inflexible fixture 51 integrally formed with the split coating resin 421. Also, the resin flexible fixture 53 protrudes from the split coating resin 421 parallel to the plane in which the legs 43 are arranged, and bends in a direction perpendicular to the plane in which the legs 43 are arranged midway. On the tip side of the extension of the resin flexible fixture 53, it bends again and extends parallel to the plane in which the legs 43 are arranged. The resin flexible fixture 53 acquires high elasticity due to such slender dimensions and bent shape, and functions as the flexible fixture 52. Incidentally, a metal fitting may be inserted into the resin flexible fixture 53 as an insert.

[0052] Furthermore, two of each of the four corner fixtures 5 are arranged so as to sandwich the center of gravity of each yoke portion 44. Thereby, the fixture 5 can support the yoke portion 44 at the center of gravity, the stability of the core portion 4 is enhanced, and it becomes difficult for the vibration direction of the reactor body 2 to become complicated.

[0053] The reactor body 2 is housed in the support case 9, and the fixture 5 is fixed to the fixing portion 92 of the support case 9, but the fixing destination of the fixture 5 is not limited to this. For example, the fixture 5 may be fixed to an external fastening location such as a bracket installed near the circuit on which the reactor body 2 is mounted. In this case, the support case 9 for housing the reactor body 2 is not essential.

[0054] Such an embodiment is presented as an example and is not limited to the above embodiment. The above embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. And the embodiment and its modifications are included in the scope of the present invention.

Explanation of Reference Numerals

[0055] 1 Reactor 2 Reactor Body 3 Coil 31 Conductive Wire 4 Core Portion 41 Core body 411 Core block 42 Core coating resin 421 Divided coating resin 43 Leg 44 Yoke part 45 Orthogonal axis 46 Center line 47 Divided core part 5 Fixture 51 Rigid fixture 511 Metal collar 52 Flexible fixture 521 Bolt hole 53 Resin flexible fixture 8 Filler 9 Support case 91 Opening 92 Fixed part

Claims

1. A reactor having a coil and a core portion on which the coil is mounted, wherein the core portion includes a core body containing a magnetic material, a core coating resin covering part or all of the core body, and a fixture provided on the core coating resin for fixing the core portion, the fixture is provided at at least four corners of the core coating resin, among the fixtures at the four corners, one set arranged in one diagonal is an inflexible fixture, and the other set arranged in the other diagonal is a flexible fixture, the core coating resin has a shape in which the shape of the core coating resin including the fixture is symmetric with respect to an orthogonal axis passing through the center of the core portion and orthogonal to a plane including the four corners, characterized by the reactor.

2. The core coating resin has a divided coating resin that is divided by a straight line passing through the center of the core portion and orthogonal to the orthogonal axis, and the fixtures at the four corners are arranged separately in two pieces each, the divided coating resins are of the same shape and size, characterized by the reactor according to Claim 1.

3. The core body includes a plurality of legs arranged in parallel and on which the coil is mounted, a pair of yoke portions that are divided and arranged at both ends of the plurality of legs, connect the ends of the plurality of legs, and define the core body as a closed magnetic circuit, and has the core coating resin has the divided coating resin divided by the straight line passing through the center of each of the plurality of legs, characterized by the reactor according to Claim 2.

4. The core body includes a plurality of legs arranged in parallel and on which the coil is mounted, a pair of yoke portions that are divided and arranged at both ends of the plurality of legs, connect the ends of the plurality of legs, and define the core body as a closed magnetic circuit, and has each two of the fixtures at the four corners are arranged sandwiching the center of gravity of each yoke portion, characterized by the reactor according to Claim 1 or 2.

5. comprising a support case that houses the coil and the core portion and fixes the core portion via the fixture, characterized by the reactor according to any one of Claims 1 to 4.

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