JP2023162685A - Reactor and reactor manufacturing method - Google Patents

Abstract

To provide a reactor and a reactor manufacturing method in which the amount of varnish fixed is increased and the adhesion strength between a core, an insulating material, and a coil is improved.SOLUTION: A reactor 1 includes an inner core portion 11A, a coil 31 arranged around the outer periphery of the inner core portion 11A, an insulating material 21 disposed between the inner core portion 11A and the coil 31, and a protective agent fixing material 41 disposed between the inner core portion 11A and the insulating material 21, and the inner core portion 11A is formed of one or more inner cores, and the protective agent fixing material 41 is impregnated with varnish that adheres the inner core portion 11A and the insulating material 21.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a reactor and a method for manufacturing the reactor.

In the reactor manufacturing process, the entire reactor is impregnated with varnish in order to fix the core, insulating material, and coil. A technique is known in which a reactor body in which a core whose outer peripheral surface is covered with an insulating sheet is placed inside a coil is impregnated with varnish (see, for example, Patent Document 1).

JP 2017-117817 Publication

In the reactor manufacturing process, if the amount of varnish fixed after varnish impregnation is insufficient, the adhesion strength between the core, insulating material, and coil may decrease. Therefore, it is desirable to increase the amount of varnish fixation and improve the adhesion strength between the core, insulating material, and coil.

An object of the present disclosure is to provide a reactor and a method for manufacturing the reactor in which the amount of varnish fixed is increased and the adhesion strength between a core, an insulating material, and a coil is improved.

According to the present disclosure, an inner core part, a coil disposed on the outer periphery of the inner core part, an insulating material disposed between the inner core part and the coil, and an inner core part and the insulating material a protective agent fixing material disposed between the inner core portion and the insulating material, the inner core portion being formed by one or more inner cores, and the protective agent fixing material disposed between the inner core portion and the insulating material. A reactor is provided impregnated with the protective agent to which the adhesive adheres.

According to the present disclosure, an inner core part, a coil disposed on the outer periphery of the inner core part, an insulating material disposed between the inner core part and the coil, and an inner core part and the insulating material a fixing material for a protective agent disposed between the insulating material, the fixing material for a protective agent being disposed on one surface of the insulating material, and a fixing material for a protective agent disposed between the insulating material. The inner core portion is disposed on a surface opposite to the surface in contact with the insulating material, and the inner core portion is wrapped with the insulating material and the protective agent fixing material and is disposed inside the coil; A method for manufacturing a reactor is provided, in which the fixing material for a protective agent is impregnated with a fixing material for a protective agent.

According to the present disclosure, a reactor and a method for manufacturing the reactor are provided in which the amount of varnish fixed is increased and the adhesion strength between a core, an insulating material, and a coil is improved.

FIG. 1 is a perspective view of a reactor according to a first embodiment. FIG. 2 is a front view of the reactor according to the first embodiment. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is a schematic diagram showing a protective agent fixing material disposed around the inner core. FIG. 5 is a partially enlarged view of the axial end portion of the inner core portion. FIG. 6 is a process diagram showing the method for manufacturing the reactor according to the first embodiment. FIG. 7 is a process diagram showing the method for manufacturing the reactor according to the first embodiment. FIG. 8 is a diagram showing a confirmation test of the adhesion strength of the protective agent disposed around the inner core part. FIG. 9 is a diagram showing the test results of a confirmation test of the adhesion strength of the protective agent disposed around the inner core part. FIG. 10 is a schematic diagram showing a modification of the protective agent fixing material disposed around the inner core portion. FIG. 11 is a schematic diagram showing a modification of the protective agent fixing material disposed around the inner core portion. FIG. 12 is a front view of a modified example of the reactor. FIG. 13 is a schematic diagram showing a modified example of the reactor.

Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings, but the present invention is not limited thereto. The components of the embodiments described below can be combined as appropriate. Furthermore, some components may not be used.

[First embodiment]
<Reactor>
FIG. 1 is a perspective view of a reactor according to a first embodiment. FIG. 2 is a front view of the reactor according to the first embodiment. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. The reactor 1 is used, for example, in a charger that charges a rechargeable battery of a work vehicle such as a small hydraulic excavator. The reactor 1 includes an inner core portion 11A, an outer core portion 11B, an insulating material 21, a coil 31, and a protective agent fixing material 41.

In this embodiment, the protective agent is, for example, varnish, but is not limited thereto. The protective agent may be any material as long as it can be impregnated into the protective agent fixing material 41. The protective agent may be any material as long as it has electrical insulation and heat resistance, for example. The protective agent may be any material as long as it is capable of fixing the inner core portion 11A and the insulating material 21.

In the following description, the direction parallel to the axial direction of the inner core portion 11A is referred to as the left-right direction. The direction perpendicular to the plane on which the reactor 1 is installed is referred to as the up-down direction. The left-right direction and the up-down direction are orthogonal. The direction perpendicular to the left-right direction and the up-down direction is called the front-back direction. The axis parallel to the front-rear direction is the X-axis, the axis parallel to the up-down direction is the Y-axis, and the axis parallel to the left-right direction is the Z-axis.

The reactor core 11 includes a pair of inner core parts 11A arranged along a first direction, that is, the left-right direction, and facing each other, and a pair of inner core parts 11A, arranged along a second direction, that is, the up-down direction, and facing each other. The outer core portion 11B is formed into a rectangular ring shape.

The pair of inner core portions 11A are spaced apart in the vertical direction. The upper inner core portion 11A and the lower inner core portion 11A are spaced apart from each other in the vertical direction. When there is no particular need to distinguish between the upper inner core portion 11A and the lower inner core portion 11A, they will be referred to as the inner core portion 11A.

The inner core portion 11A is formed by one or more inner cores. In this embodiment, the inner core portion 11A is formed by two inner cores arranged side by side in the left-right direction. More specifically, the upper inner core portion 11A is formed by an inner core 111 and an inner core 112. The lower inner core portion 11A is formed by an inner core 113 and an inner core 114. The individual inner cores, in this embodiment inner core 111, inner core 112, inner core 113 and inner core 114, are similarly constructed.

The pair of outer core portions 11B are spaced apart from each other in the left-right direction. The right outer core portion 11B and the left outer core portion 11B are spaced apart from each other in the left-right direction. When there is no particular need to distinguish between the right outer core part 11B and the left outer core part 11B, they will be referred to as outer core part 11B.

The outer core portion 11B is formed by one or more outer cores. In the embodiment, the outer core portion 11B is formed by one outer core. More specifically, the right outer core portion 11B is formed by the outer core 115. The left outer core portion 11B is formed by the outer core 116.

As shown in FIG. 2, the reactor core 11 is formed into a rectangular ring shape with an inner core 111, an inner core 112, an outer core 116, an inner core 114, an inner core 113, and an outer core 115 arranged clockwise. . A gap material 121 is arranged between the inner core 111 and the inner core 112. A gap material 122 is arranged between the inner core 112 and the outer core 116. A gap material 123 is arranged between the outer core 116 and the inner core 114. A gap material 124 is arranged between the inner core 114 and the inner core 113. A gap material 125 is arranged between the inner core 113 and the outer core 115. A gap material 126 is arranged between the outer core 115 and the inner core 111.

In this embodiment, the reactor core 11 is fixed in a rectangular annular shape with varnish. More specifically, the inner core 111, the inner core 112, and the gap material 121 are fixed with varnish. Inner core 112, outer core 116, and gap material 122 are fixed with varnish. The outer core 116, the inner core 114, and the gap material 123 are fixed with varnish. Inner core 114, inner core 113, and gap material 124 are fixed with varnish. Inner core 113, outer core 115, and gap material 125 are fixed with varnish. The outer core 115, the inner core 111, and the gap material 126 are fixed with varnish.

FIG. 4 is a schematic diagram showing a protective agent fixing material disposed around the inner core. As shown in FIG. 4, the insulating material 21 is disposed between the inner core portion 11A and the coil 31. The insulating material 21 is disposed so as to cover the circumferential direction, which is the outer circumferential direction of the inner core portion 11A when viewed in the axial direction. The insulating material 21 insulates the inner core portion 11A and the coil 31. The insulating material 21 is made of an electrically insulating material. The insulating material 21 is in the form of one sheet. The insulating material 21 is, for example, insulating paper.

The coil 31 is arranged around the outer periphery of the inner core portion 11A. A gap of, for example, several millimeters is created between the inner periphery of the coil 31 and the outer periphery of the inner core portion 11A. The insulating material 21 and the protective agent fixing material 41 are arranged in the gap between the inner periphery of the coil 31 and the outer periphery of the inner core portion 11A.

As shown in FIG. 4, the protective agent fixing material 41 is disposed between the inner core portion 11A and the insulating material 21. As shown in FIG. The protective agent fixing material 41 is impregnated with a protective agent that bonds the inner core portion 11A and the insulating material 21 together. In this embodiment, the protective agent fixing material 41 is impregnated with varnish. The protective agent fixing material 41 is more easily impregnated with the protective agent than the insulating material 21 . The protective agent fixing material 41 is, for example, a nonwoven fabric, but is not limited thereto. The protective agent fixing material 41 may be any material that has cushioning properties that can fill the gap between the inner core portion 11A and the coil 31, and that can impregnate and fix varnish.

As shown in FIG. 2, in this embodiment, the protective agent fixing material 41 is divided into a plurality of parts in the axial direction of the inner core portion 11A. More specifically, a total of four protective agent fixing materials 41 are arranged, one for each core of the upper inner core section 11A and one for each core of the lower inner core section 11A. A protective agent fixing material 41 ₁ and a protective agent fixing material 41 ₂ are arranged in the upper inner core portion 11A. The protective agent fixing material ₄₁₁ is wound around the inner core 111 of the upper inner core portion 11A. The protective agent fixing material ₄₁₂ is wound around the inner core 112 of the upper inner core portion 11A. Similarly, a protective agent fixing material 41 ₁ and a protective agent fixing material 41 ₂ are arranged in the lower inner core portion 11A. The protective agent fixing material ₄₁₁ is wound around the inner core 113 of the lower inner core portion 11A. The protective agent fixing material ₄₁₂ is wound around the inner core 114 of the lower inner core portion 11A. The fixing material for protective agent 41 ₁ and the fixing material for protective agent 41 ₂ are referred to as the fixing material for protective agent 41 unless it is particularly necessary to distinguish between the fixing material for protective agent 41 ₁ and the fixing material for protective agent 41 ₂ .

The axial length of the divided protective agent fixing material 41 wrapped around the inner core portion 11A is shorter than the axial length of each of the inner core 111, the inner core 112, the inner core 113, and the inner core 114. .

The length of the protective agent fixing material 41 in the lateral direction is shorter than the length of each core in the axial direction of the inner core portion 11A. In this embodiment, the length of the protective agent fixing material 41 in the lateral direction is shorter than the length of each of the inner core 111, the inner core 112, the inner core 113, and the inner core 114 in the axial direction, for example, by several mm.

FIG. 5 is a partially enlarged view of the axial end portion of the inner core portion. As shown in FIG. 5, there is a gap of distance d between the axial end of the protective agent fixing material 411 surrounding the inner core ₁₁₁ and the end of the gap material 126. Although not shown, a gap of distance d is provided between the axial end of the protective agent fixing material ₄₁₂ that wraps the inner core 112 and the end of the gap material 122 (see FIG. 2). have There is a gap of distance d between the axial end of the protective agent fixing material ₄₁₂ surrounding the inner core 113 and the end of the gap material 125 (see FIG. 2). There is a gap of distance d between the axial end of the protective agent fixing material ₄₁₂ surrounding the inner core 114 and the end of the gap material 123 (see FIG. 2).

In this embodiment, the protective agent fixing material 41 is in the form of one sheet, and a plurality of sheets are laminated between the inner core portion 11A and the insulating material 21. In FIGS. 3 and 4, since the protective agent fixing material 41 is schematically illustrated, the state in which a plurality of sheets are stacked is not illustrated. The protective agent fixing material 41 has an elongated rectangular shape. In the plurality of protective agent fixing materials 41, the distance between the protective agent fixing materials 41 increases in accordance with the gap between the insulating material 21 and the inner core portion 11A.

In this embodiment, the protective agent fixing material 41 is arranged as a single sheet folded. In this embodiment, the protective agent fixing material 41 is folded at two folds along the transverse direction that are spaced apart from each other in the longitudinal direction. By being folded, the protective agent fixing material 41 is in a state where a plurality of sheets are stacked. In the folded protective agent fixing material 41, the creases open and spread to fit the gap between the insulating material 21 and the inner core portion 11A.

The length of the protective agent fixing material 41 in the unfolded state in the longitudinal direction is longer than the circumference of the inner core portion 11A in the axial direction when the protective agent fixing material 41 is folded and wrapped around the inner core portion 11A. , for example, the length is about several mm shorter.

Bracket 61 and bracket 62 support reactor core 11. More specifically, the bracket 61 and the bracket 62 are arranged facing each other and separated from each other in the left-right direction. Bracket 61 and bracket 62 are plate-shaped. The bracket 61 and the bracket 62 sandwich the reactor core 11, which is arranged with the axial direction parallel to the left-right direction, from the left-right direction. Bolt 63 and bolt 64 extend along the left-right direction. Bolts 63 and bolts 64 fix reactor core 11 to brackets 61 and 62. The bolts 63 fix the upper sides of the brackets 61 and 62. The bolts 64 fix the lower sides of the brackets 61 and 62.

<Reactor manufacturing method>
Next, a method for manufacturing a reactor will be described with reference to FIGS. 6 and 7. FIG. 6 is a process diagram showing the method for manufacturing the reactor according to the first embodiment. FIG. 7 is a process diagram showing the method for manufacturing the reactor according to the first embodiment.

First, a sheet-shaped protective agent fixing material 41 is prepared (step S11). The length of the sheet-shaped protective agent fixing material 41 in the longitudinal direction in step S11 is approximately three times the circumferential length of the inner core portion 11A when viewed in the axial direction.

The sheet-shaped protective agent fixing material 41 is folded (step S12). In this embodiment, as an example, the protective agent fixing material 41 is folded into three by folding along the folds 41a and 41b along the transverse direction. Three sheets of the protective agent fixing material 41 folded in three are stacked. The length of the folded protective agent fixing material 41 is shorter, for example, by several millimeters than the circumferential length of the inner core portion 11A when viewed in the axial direction.

The folded protective agent fixing material 41 is placed on one surface of the insulating material 21, and the inner core portion 11A is placed on the surface of the protective agent fixing material 41 opposite to the surface in contact with the insulating material 21 (step S13). In the example shown in FIG. 6, a folded protective agent fixing material 41 ₁ and a protective agent fixing material 41 ₂ are arranged on one surface of the insulating material 21 . Then, the inner core 111 is placed on the folded protective agent fixing material ₄₁₁ . The inner core 112 is placed on the folded protective agent fixing material ₄₁₂ . A gap material 121 is arranged between the inner core 111 and the inner core 112.

The inner core portion 11A is wrapped with the insulating material 21 and the folded protective agent fixing material 41 (step S14). More specifically, the folded protective agent fixing material 41 ₁ is bent along the outer periphery of the inner core 111 so that the folds 41 a and 41 b are brought close to each other and wrapped so as to cover the exposed surface of the inner core 111 . A part of the inner core 111 is exposed in the circumferential direction from the protective agent fixing material ₄₁₁ . Similarly, the folded protective agent fixing material ₄₁₂ is bent along the outer periphery of the inner core 112 so that the folds 41a and 41b are brought close to each other and wrapped to cover the exposed surface of the inner core 112. A part of the inner core 112 is exposed from the protective agent fixing material ₄₁₂ in the circumferential direction. The protective agent fixing material 41 surrounding the inner core portion 11A is temporarily fixed using, for example, an adhesive tape. Then, the insulating material 21 is bent along the inner core 111 wrapped by the protective agent fixing material 41 ₁ and the inner core 112 wrapped by the protective agent fixing material 41 ₂ , and the left and right ends of the insulating material 21 are bent. The inner core 111 is wrapped by the fixing material 41 ₁ for the protective agent, and the inner core 112 is wrapped by the fixing material 41 ₂ for the protective agent. The insulating material 21 is wound in the circumferential direction so that the protective agent fixing material 41 ₁ surrounding the inner core 111 and the protective agent fixing material 41 ₂ surrounding the inner core 112 are not exposed. The insulating material 21 surrounding the inner core 111 wrapped by the protective agent fixing material 41 ₁ and the inner core 112 wrapped by the protective agent fixing material 41 ₂ is temporarily fixed using adhesive tape, for example. .

After step S14, the folded protective agent fixing material 41 opens its folds and spreads out in accordance with the gap between the insulating material 21 and the inner core portion 11A.

The inner core portion 11A is wrapped with the insulating material 21 and the protective agent fixing material 41 and placed inside the coil 31 (step S15).

The processes from step S11 to step S15 are performed twice to assemble a pair of inner core portions 11A wrapped with the insulating material 21 and the protective agent fixing material 41.

Then, a pair of inner core parts 11A surrounded by the insulating material 21 and a protective agent fixing material 41 are arranged facing each other, and a pair of outer core parts 11B are arranged facing each other, thereby forming a rectangular annular reactor core 11. do. A gap material is arranged when the pair of inner core parts 11A and the pair of outer core parts 11B are arranged in a rectangular annular shape. More specifically, a gap material 122 is disposed between the inner core 112 and the outer core 116. A gap material 123 is arranged between the outer core 116 and the inner core 114. A gap material 125 is arranged between the inner core 113 and the outer core 115. A gap material 126 is arranged between the outer core 115 and the inner core 111.

Then, the reactor core 11 formed in a rectangular annular shape is fixed with bolts 63 and 64 while being sandwiched between the brackets 61 and 62 from the left and right.

Then, the entire reactor core 11 fixed to the brackets 61 and 62 is dipped in varnish. As a result, the protective agent fixing material 41 is impregnated with a protective agent such as varnish. The protective agent fixing material 41 is impregnated with varnish and fixed with the folds opened and expanded to match the gap between the insulating material 21 and the inner core portion 11A. Since the varnish impregnates the protective agent fixing material 41, more varnish is fixed between the insulating material 21 and the inner core portion 11A than in the case where the protective agent fixing material 41 is not present. The adhesion strength between the insulating material 21 and the inner core portion 11A increases.

When the varnish has a strong adhesion force, the positions of the inner core portion 11A and the coil 31 are firmly fixed. If the adhesion force of the varnish is insufficient, there is a risk that the positions of the inner core portion 11A and the coil 31 may shift. If the positions of the inner core portion 11A and the coil 31 are misaligned, there is a risk that the corners of the inner core portion 11A and the insulating material 21 will come into contact with each other.

<Confirmation test of adhesive strength of protective agent>
Next, a confirmation test for the adhesion strength of the protective agent will be explained using FIGS. 8 and 9. FIG. 8 is a diagram showing a confirmation test of the adhesion strength of the protective agent disposed around the inner core part. FIG. 9 is a diagram showing the test results of a confirmation test of the adhesion strength of the protective agent disposed around the inner core part. In this confirmation test, the inner core portion 11A wrapped with the insulating material 21 and the protective agent fixing material 41, which was manufactured by performing the processes from step S11 to step S15, is used as a test piece.

A test is performed in which the inner core portion 11A of the test piece is pressed in the X-axis direction, the Y-axis direction, and the Z-axis direction to measure the displacement between the inner core portion 11A of the test piece and the coil 31. In the tests in the X-axis direction and the Y-axis direction, the test is performed with the inner core portion 11A of the test piece fixed between the jigs 200 and sandwiched in the axial direction. In the test in the X-axis direction, a load FX of, for example, 500 N or less is applied to the test piece in the X-axis direction via a push plate (not shown). Then, the relationship between the load FX and the displacement of the inner core portion 11A in the X-axis direction is measured. In the test in the Y-axis direction, a load FY of, for example, 500 N or less is applied to the test piece in the Y-axis direction via a push plate 201 shown in FIG. Then, the relationship between the load FY and the displacement of the inner core portion 11A in the Y-axis direction is measured. In the test in the Z-axis direction, a load FZ is applied to the test piece in the Z-axis direction via a push plate (not shown). The relationship between the load FZ and the inner core portion 11A in the Z-axis direction is measured.

The test results will be explained using FIG. 9. The test results in the X-axis direction are shown by a solid line. The test results in the Y-axis direction are shown by dashed lines. The test results in the Z-axis direction showed that the insulating material 21 peeled off from the inner core portion 11A in all test pieces when the load FZ was 150N. ◆ and ◇ are comparative examples with respect to the present embodiment, and test specimens of Comparative Example 1 and Comparative Example 2, in which the inner core portion 11A was wrapped with the insulating material 21 and impregnated with varnish, without the protective agent fixing material 41. Show the results. Black □, □, ●, ○, black △ and △ are the inner core portion 11A of this embodiment, and the inner core portion 11A is wrapped with a protective agent fixing material 41 and impregnated with varnish. The test results of the test pieces of Example 1, Example 2, Example 3, Example 4, Example 5, and Example 6 are shown. From the test results shown in FIG. 9, the amount of displacement of the test pieces of this embodiment is suppressed more than that of the test pieces of the comparative example.

<Effect>
In the embodiment, the varnish impregnates the protective agent fixing material 41 disposed between the insulating material 21 and the inner core portion 11A. According to the present embodiment, more varnish can be fixed between the insulating material 21 and the inner core portion 11A than in the case where the protective agent fixing material 41 is not present. According to this embodiment, the adhesion strength between the insulating material 21 and the inner core portion 11A can be increased. According to this embodiment, it is possible to suppress misalignment between the inner core portion 11A and the coil 31, and to suppress contact between the corners of the inner core portion 11A and the insulating material 21.

In this embodiment, a plurality of sheet-shaped protective agent fixing materials 41 are arranged between the inner core portion 11A and the insulating material 21. According to this embodiment, in the plurality of protective agent fixing materials 41, the distance between the protective agent fixing materials 41 increases in accordance with the gap between the insulating material 21 and the inner core portion 11A. According to this embodiment, since the protective agent fixing material 41 is spread out, the adhesion strength between the insulating material 21 and the inner core portion 11A can be increased.

In this embodiment, the sheet-shaped protective agent fixing material 41 is placed between the inner core portion 11A and the insulating material 21 in a folded state. According to the present embodiment, the protective agent fixing material 41 is folded so that a plurality of sheets overlap. In the folded protective agent fixing material 41, the creases open and spread to fit the gap between the insulating material 21 and the inner core portion 11A. According to this embodiment, the adhesive strength between the insulating material 21 and the inner core portion 11A can be increased by expanding the folded protective agent fixing material 41.

In this embodiment, the length of the protective agent fixing material 41 in the lateral direction is shorter than the length of each of the inner core 111, the inner core 112, the inner core 113, and the inner core 114 in the axial direction, for example, by several mm. According to this embodiment, when manufacturing the reactor core 11, it is possible to prevent the ends of the protective agent fixing material 41 from being caught in the gap material and the outer core portion 11B.

In this embodiment, the protective agent fixing material 41 is a nonwoven fabric. When manufacturing the reactor core 11, the tolerance between the inner core portion 11A and the coil 31 is large, making positioning difficult. In this embodiment, since the protective agent fixing material 41 is made of a nonwoven fabric, the gap between the inner core portion 11A and the coil 31 can be filled due to its cushioning properties. Further, in this embodiment, since the protective agent fixing material 41 is a nonwoven fabric, it is easily impregnated with varnish, and the amount of varnish fixed between the insulating material 21 and the inner core portion 11A can be increased.

<Modification 1>
FIG. 10 is a schematic diagram showing a modification of the protective agent fixing material disposed around the inner core portion. In FIG. 10, since the protective agent fixing material 41 is schematically illustrated, the state in which a plurality of sheets are stacked is not illustrated. In the example shown in FIG. 10, the protective agent fixing material 41 is divided in the circumferential direction of the inner core portion 11A. In the example shown in FIG. 10, the protective agent fixing material 41 is divided into four parts: protective agent fixing material 41 ₃ , protective agent fixing material 41 ₄ , protective agent fixing material 41 ₅ , and protective agent fixing material 41 ₆ . It is divided. The divided protective agent fixing material 41 is disposed to cover at least one circumferential corner of the inner core portion 11A. In this embodiment, the protective agent fixing material 41 ₃ , the protective agent fixing material 41 ₄ , the protective agent fixing material 41 ₅ and the protective agent fixing material 41 ₆ are arranged at four corners of the inner core portion 11A. ing. According to this modification, contact between the corners of the inner core portion 11A and the insulating material 21 can be suppressed.

<Modification 2>
FIG. 11 is a schematic diagram showing a modification of the protective agent fixing material disposed around the inner core portion. FIG. 12 is a front view of a modified example of the reactor. In FIG. 11, since the protective agent fixing material 41 is schematically illustrated, the state in which a plurality of sheets are stacked is not illustrated. In the example shown in FIGS. 11 and 12, the protective agent fixing material 41 is divided into two, a protective agent fixing material ₄₁₇ and a protective agent fixing material ₄₁₈ . The protective agent fixing material 41 is not divided in the axial direction. The axial length of the protective agent fixing material 41 wrapped around the inner core portion 11A is, for example, about several mm shorter than the axial length of the inner core portion 11A. The axial length of the protective agent fixing material 41 wrapped around the inner core portion 11A is shorter than the combined axial length of the inner core 111, the inner core 112, and the gap material 121. The axial length of the protective agent fixing material 41 wrapped around the inner core portion 11A is shorter than the respective axial lengths of the inner core 113, the inner core 114, and the gap material 124.

<Modification 3>
FIG. 13 is a schematic diagram showing a modified example of the reactor. In the example shown in FIG. 13, the reactor 1 does not include the insulating material 21. The reactor 1 includes an inner core portion 11A, a coil 31 disposed around the outer periphery of the inner core portion 11A, and a protective agent fixing material 41 disposed between the inner core portion 11A and the coil 31. The core portion 11A is formed of one or more inner cores, and the protective agent fixing material 41 is impregnated with varnish that adheres the inner core portion 11A and the coil 31. In this modification, the protective agent fixing material 41 also functions as an insulating material.

<Other variations>
In the above description, it is assumed that one sheet of the protective agent fixing material 41 is folded and used, but a plurality of protective agent fixing materials 41 may be arranged one on top of the other.

DESCRIPTION OF SYMBOLS 1...Reactor, 11...Reactor core, 11A...Inner core part, 11B...Outer core part, 111...Inner core, 112...Inner core, 113...Inner core, 114...Inner core, 115...Outer core, 116...Outer core , 121... Gap material, 122... Gap material, 123... Gap material, 124... Gap material, 125... Gap material, 126... Gap material, 21... Insulating material, 31... Coil, 41... Fixing material for protective agent, 61... Bracket, 62...Bracket, 63...Bolt, 64...Bolt.

Claims (10)

an inner core part;
a coil disposed around the outer periphery of the inner core portion;
a protective agent fixing material disposed between the inner core portion and the coil;
Equipped with
The inner core portion is formed by one or more inner cores,
The protective agent fixing material is impregnated with a protective agent that adheres the inner core portion and the coil.
reactor. an insulating material disposed between the coil and the protective agent fixing material;
The reactor according to claim 1, further comprising: The protective agent fixing material is in the form of a sheet, and a plurality of sheets are arranged between the inner core part and the insulating material.
The reactor according to claim 2. The protective agent fixing material is arranged in a folded state.
The reactor according to claim 3. The fixing material for the protective agent is a nonwoven fabric.
The reactor according to claim 4. The protective agent fixing material is divided in the circumferential direction of the inner core portion,
The divided protective agent fixing material is disposed to cover at least one circumferential corner of the inner core portion.
A reactor according to any one of claims 1 to 5. The protective agent fixing material is divided into a plurality of parts in the axial direction of the inner core part,
The axial length of the divided protective agent fixing material is shorter than the axial length of the inner core.
A reactor according to any one of claims 1 to 5. The length of the protective agent fixing material in the lateral direction is shorter than the length of the inner core in the axial direction.
A reactor according to any one of claims 1 to 5. A rectangular shape is formed by a pair of inner core parts arranged along a first direction and facing each other, and a pair of outer core parts arranged facing each other along a second direction different from the first direction. A reactor core formed in an annular shape,
The reactor according to any one of claims 1 to 5, comprising: an inner core part;
a coil disposed around the outer periphery of the inner core portion;
an insulating material disposed between the inner core portion and the coil;
a protective agent fixing material disposed between the inner core portion and the insulating material;
A method for manufacturing a reactor comprising:
disposing the protective agent fixing material on one surface of the insulating material, and disposing the inner core portion on the opposite surface of the protective agent fixing material from the surface in contact with the insulating material;
The insulating material and the protective agent fixing material are placed inside the coil in a state where the inner core portion is wrapped,
impregnating the protective agent fixing material with a protective agent fixing material;
How to manufacture a reactor.

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