Reactors, converters, and power conversion devices

Abstract

To provide a reactor which has the excellent assemblability of a coil to a core.SOLUTION: In a reactor which has a coil 2, a holding member 4 and a magnetic core, the coil has: a first terminal part 21a which is drawn from a first end 2a of the coil; and a second terminal part 21b which is drawn from a second end of the coil. The holding member has a first holding member 4a and a second holding member 4b. The first holding member has: a first body part 40a which comes into contact with the first end; and a first insertion part 41a which has a through hole to which the first terminal part is inserted. The second holding member has a second body part 40b which comes into contact with the second end. One of the first holding member and the second holding member has a first connection part 51 which is arranged along a part of an outer peripheral surface of the coil and connects the first body part with the second body part. One of the first body part and the second body part and the first connection part have a first coupling structure 53 in which they are fit to each other. The first coupling structure includes a first recess 551 and a first convex part 451.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a reactor, a converter, and a power conversion device.

Background Art

[0002] Patent Document 1 discloses a reactor including a coil, a magnetic core, and an end bobbin. The magnetic core has an inner core portion disposed inside the coil and an outer core portion disposed outside the coil. The end bobbin is disposed between the end face of the coil and the outer core portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When assembling the coil to the core, it is desired that the coil be disposed at a predetermined position of the core. The coil has springiness in terms of its structure. The coil is likely to be twisted during manufacture. Due to the springiness or twist of the coil, the coil is likely to be deformed. Since the shape of the coil is not stable, it is difficult to assemble the coil to the core. If the position of the coil with respect to the core is displaced, there is a possibility that variations will occur in the electromagnetic performance of the reactor.

[0005] One object of the present disclosure is to provide a reactor having excellent assemblability of a coil with respect to a core.

Means for Solving the Problems

[0006] The reactor of the present disclosure includes a coil, a holding member, and a magnetic core in which the coil is disposed. The coil The first terminal portion drawn out from the first end of the coil, It has a second terminal portion drawn out from the second end of the coil, The first terminal portion is drawn out from the first end in a direction perpendicular to the axis of the coil, The aforementioned retaining member is The first retaining member positioned at the first end, It has a second retaining member positioned at the second end, The first retaining member is The first main body portion that contacts the first end, It has a first insertion portion having a through hole into which the first terminal portion is inserted, The second retaining member is It has a second main body portion that is in contact with the second end, Either the first retaining member or the second retaining member is arranged along a part of the outer circumferential surface of the coil and has a first connecting portion that connects the first main body and the second main body. The first main body portion and the second main body portion and the first connecting portion have a first connecting structure that allows them to be fitted together. The first bonding structure comprises a first recess and a first protrusion. [Effects of the Invention]

[0007] The reactor of this disclosure offers excellent coil assembly relative to the core. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic plan view showing a reactor according to an embodiment. [Figure 2] Figure 2 is a schematic exploded view showing a reactor according to an embodiment. [Figure 3] Figure 3 is a schematic perspective view showing the coil provided in the reactor according to the embodiment. [Figure 4] Figure 4 is a schematic perspective view showing the coil and retaining member assembled in the reactor according to the embodiment. [Figure 5]FIG. 5 is a schematic end view showing a holding member provided in the reactor according to the embodiment. [Figure 6] FIG. 6 is a schematic right side view showing a holding member provided in the reactor according to the embodiment. [Figure 7] FIG. 7 is a schematic left side view showing a holding member provided in the reactor according to the embodiment. [Figure 8] FIG. 8 is a schematic bottom view showing a holding member provided in the reactor according to the embodiment. [Figure 9] FIG. 9 is a schematic perspective view showing a state in which a coil and a holding member provided in the reactor according to the modification are assembled. [Figure 10] FIG. 10 is a schematic right side view showing a holding member provided in the reactor according to the modification. [Figure 11] FIG. 11 is a schematic left side view showing a holding member provided in the reactor according to the modification. [Figure 12] FIG. 12 is a configuration diagram schematically showing a power supply system of a hybrid vehicle. [Figure 13] FIG. 13 is a circuit diagram schematically showing a power conversion device including a converter.

Embodiments for Carrying Out the Invention

[0009] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described.

[0010] (1) The reactor of the present disclosure includes a coil, a holding member, and a magnetic core in which the coil is disposed. The coil has a first terminal portion drawn from a first end of the coil and a second terminal portion drawn from a second end of the coil. The first terminal portion is drawn from the first end in a direction orthogonal to the axis of the coil. The holding member The first retaining member positioned at the first end, It has a second retaining member positioned at the second end, The first retaining member is The first main body portion that contacts the first end, It has a first insertion portion having a through hole into which the first terminal portion is inserted, The second retaining member is It has a second main body portion that is in contact with the second end, Either the first retaining member or the second retaining member is arranged along a part of the outer circumferential surface of the coil and has a first connecting portion that connects the first main body and the second main body. The first main body portion and the second main body portion and the first connecting portion have a first connecting structure that allows them to be fitted together. The first bonding structure comprises a first recess and a first protrusion.

[0011] The reactor of this disclosure can improve the ease of assembling the coil to the core by means of the retaining members. In the reactor of this disclosure, the first retaining member and the second retaining member are coupled to each other by the first coupling structure. Because the first retaining member and the second retaining member are positioned relative to each other, misalignment between the first body and the second body is less likely to occur. Because the first and second ends of the coil are positioned respectively, the shape of the coil is stabilized. Because the shape of the coil is stabilized, it is easier to assemble the coil to the core. As a result of improved positional accuracy of the coil relative to the core, variations in the electromagnetic performance of the reactor can be suppressed. Therefore, the productivity of the reactor is improved.

[0012] The first retaining member is assembled to the first end of the coil by sliding the coil in the direction from which the first end portion is pulled out. By sliding the coil relative to the first retaining member, the first end portion is inserted into the through hole of the first insertion portion. The position of the first end portion is restricted by its insertion into the through hole of the first insertion portion. This improves the positional accuracy of the first end portion. It also facilitates the connection work between the first end portion and the busbar.

[0013] (2) In the reactor described in (1) above, The shape of the aforementioned coil is a polygonal tube, The outer surface of the coil has a plurality of surfaces, including the first surface. The first terminal portion protrudes from the first surface when viewed from a direction along the axis of the coil, The second retaining member has the first connecting portion arranged along the first surface, The first main body portion has the first protrusion, The first connecting portion may have the first recess.

[0014] According to the configuration described in (2) above, when the coil is slid and assembled to the first holding member, the first surface of the coil is brought into contact with the first protrusion provided on the first main body. Since the outer surface of the coil is brought into contact with the first protrusion, it is easy to position the first main body at the first end.

[0015] (3) In the reactor described in (2) above, The second retaining member further has a second connecting portion that connects the first main body portion and the second main body portion. The second connecting portion is arranged along the second surface of the outer circumferential surface that is opposite to the first surface, The first main body and the second connecting part have a second connecting structure that fits together with each other. The second bonding structure may include a second recess and a second protrusion.

[0016] According to the configuration described in (3) above, the first and second retaining members are connected to each other by the first and second bonding structures. Because the first and second retaining members are positioned by the two bonding structures, misalignment between the first and second main body is less likely to occur. The shape of the coil is more stable.

[0017] (4) In the reactor described in (3) above, The first main body portion has the second protrusion, The second connecting portion has the second recess, The second protrusion may be smaller than the first protrusion.

[0018] According to the configuration described in (4) above, the second protrusion is less likely to get in the way when sliding the coil and assembling it to the first holding member. The first main body is easily positioned relative to the first end because the second surface is in contact with the second protrusion.

[0019] (5) In the reactor described in (1) above, The shape of the aforementioned coil is a polygonal tube, The outer surface of the coil has a plurality of surfaces, including the first surface. The first terminal portion protrudes from the first surface when viewed from a direction along the axis of the coil, The first retaining member may have the first connecting portion arranged along the first surface.

[0020] According to the configuration in (5) above, when the coil is slid and assembled to the first holding member, the first surface of the coil is brought into contact with the first connecting portion. Since the outer surface of the coil is brought into contact with the first connecting portion, it is easy to position the first main body at the first end.

[0021] (6) In any of the reactors described in (1) to (5) above, The second terminal portion is drawn out from the second end in a direction along the axis of the coil, The second retaining member may have a second insertion portion having a through hole into which the second terminal portion is inserted.

[0022] According to the configuration described in (6) above, the position of the second terminal is restricted by inserting it into the through-hole of the second insertion part. This improves the positional accuracy of the second terminal. It also makes it easier to connect the second terminal to the busbar.

[0023] (7) The converters of this disclosure The system comprises a reactor as described in any one of (1) to (6) above.

[0024] The converter of this disclosure, having the reactor of this disclosure, exhibits low variation in the electromagnetic performance of the reactor. The converter of this disclosure offers excellent productivity.

[0025] (8) The power converter of the present disclosure is The device is equipped with the converter described in (7) above.

[0026] The power conversion device of this disclosure is highly productive because it includes the converter of this disclosure.

[0027] [Details of the embodiments of this disclosure] Specific examples of embodiments of this disclosure will be described with reference to the drawings. The same reference numerals in the drawings indicate the same or corresponding parts. However, the present invention is not limited to these examples, and is intended to include all modifications within the meaning and scope of the claims as shown, and equivalents thereof.

[0028] <Reactor> A reactor 1 according to an embodiment will be described with reference to Figures 1 to 8. As shown in Figures 1 and 2, the reactor 1 comprises a coil 2, a magnetic core 3, and a retaining member 4. The retaining members 4 are located at both ends of the coil 2. The retaining member 4 has a first retaining member 4a and a second retaining member 4b. One of the features of the reactor 1 of this embodiment is that, as shown in Figure 5, the first retaining member 4a and the second retaining member 4b are connected to each other by a first connecting portion 51. The individual components of the reactor 1 will be described in detail below.

[0029] (coil) Referring to Figure 3, the configuration of coil 2 will be described. Coil 2 has a cylindrical shape. Coil 2 has a first end 2a and a second end 2b. In this embodiment, coil 2 is an edgewise coil in which a flat wire is wound in a spiral shape.

[0030] The shape of coil 2 may be polygonal or cylindrical. A polygonal shape means that the contour shape of the end face of coil 2 is polygonal. Polygonal shapes include, for example, quadrilaterals, hexagons, and octagons. A quadrilateral includes a rectangular shape. A rectangular shape also includes a square shape. For example, a quadrilateral is not limited to a geometric quadrilateral, but also includes quadrilaterals with modifications to the details, such as a shape in which at least one of the four corners is rounded. A cylindrical shape means that the contour shape of the end face of coil 2 is circular. A circular shape includes not only a perfect circle but also an oval shape. An oval shape also includes an ellipse shape.

[0031] In this embodiment, the shape of the coil 2 is polygonal. Specifically, the shape of the coil 2 is rectangular. The outer circumferential surface 23 of the coil 2 has multiple surfaces, including a first surface 231. Specifically, the outer circumferential surface 23 of the coil 2 has four surfaces and four corners. Each surface is a plane. Each corner is an arc-shaped curved surface. The four surfaces include the first surface 231, the second surface 232, the third surface 233, and the fourth surface 234. The first surface 231 and the second surface 232 are located on opposite sides of the coil 2 with respect to the central axis. The third surface 233 and the fourth surface 234 are located on opposite sides of the coil 2 with respect to the central axis. In this embodiment, the direction that the first surface 231 faces is to the right. The direction that the second surface 232 faces is to the left. The direction that the third surface 233 faces is upward. The direction that the fourth surface 234 faces is downward.

[0032] Coil 2 has a first end portion 21a and a second end portion 21b. The first end portion 21a is drawn out from the first end 2a. The second end portion 21b is drawn out from the second end 2b. In this embodiment, the first end portion 21a is drawn out from the first end 2a in the Y-axis direction perpendicular to the axis of coil 2. The second end portion 21b is drawn out from the second end 2b in the X-axis direction along the axis of coil 2. In this embodiment, the X-axis direction, Y-axis direction and Z-axis direction are defined as follows: The X-axis direction is the direction along the axis of coil 2, from the first end 2a to the second end 2b. The Y-axis direction is the direction perpendicular to the X-axis direction, from the second surface 232 to the first surface 231. The Y-axis direction is to the right. The Z-axis direction is the direction perpendicular to both the X-axis direction and the Y-axis direction, from the fourth surface 234 to the third surface 233. The Z-axis direction is upward.

[0033] In this embodiment, the first terminal portion 21a protrudes from the first surface 231 when viewed from a direction along the axis of the coil 2. The first terminal portion 21a protrudes in a direction perpendicular to the first surface 231. Specifically, the first terminal portion 21a protrudes in the Y-axis direction. That is, the first terminal portion 21a extends along a plane that extends the end face of the first end 2a in the Y-axis direction. The position from which the first terminal portion 21a is pulled out is the corner between the first surface 231 and the third surface 233 of the first end 2a. The second terminal portion 21b protrudes from the end face of the second end 2b. The second terminal portion 21b extends in a direction perpendicular to the end face of the second end 2b. The position from which the second terminal portion 21b is pulled out is the corner between the second surface 232 and the third surface 233 of the second end 2b.

[0034] Busbars (not shown) are connected to the first terminal section 21a and the second terminal section 21b. The connection between each terminal section and the busbar is made, for example, by welding. The busbars are components that electrically connect the coil 2 to external equipment (not shown).

[0035] (Magnetic core) The configuration of the magnetic core 3 will be described with reference to Figures 1 and 2. The coil 2 is arranged in the magnetic core 3. In this embodiment, the magnetic core 3 has a middle core portion 31, a side core portion 33, and an end core portion 35. As shown in Figure 1, the magnetic core 3 has a θ-shaped form in plan view.

[0036] The magnetic core 3 forms a θ-shaped closed magnetic circuit. When the coil 2 is energized, magnetic flux flows through the magnetic core 3. The magnetic flux generated by the coil 2 flows from the middle core section 31, through the end core section 35 and the side core section 33, and back to the middle core section 31.

[0037] (Middle core section) The middle core portion 31 is a part that is placed inside the coil 2, as shown in Figure 1. There is one middle core portion 31. Both ends of the middle core portion 31 may protrude from both ends of the coil 2. These protruding parts are also part of the middle core portion 31. In this embodiment, the shape of the middle core portion 31 is substantially a rectangular parallelepiped.

[0038] The middle core portion 31 is positioned between the first end core portion 35a and the second end core portion 35b. The first end core portion 35a and the second end core portion 35b will be described later. The first end of the middle core portion 31 is connected to the first end core portion 35a. The second end of the middle core portion 31 is connected to the second end core portion 35b.

[0039] In this embodiment, the middle core portion 31 has a first middle core portion 31a and a second middle core portion 31b. The first middle core portion 31a and the second middle core portion 31b are arranged in series in a direction along the length of the middle core portion 31. The direction along the length of the middle core portion 31 coincides with the direction along the axis of the coil 2, i.e., the X-axis direction. The first middle core portion 31a is coupled to the first end core portion 35a. The second middle core portion 31b is coupled to the second end core portion 35b. The boundary between the first middle core portion 31a and the second middle core portion 31b is located within the coil 2. The lengths of the first middle core portion 31a and the second middle core portion 31b can be set as appropriate. The lengths of the first middle core portion 31a and the second middle core portion 31b may be the same or different.

[0040] The middle core portion 31 may have a gap between the first middle core portion 31a and the second middle core portion 31b. Having a gap in the middle core portion 31 allows the inductance of the reactor 1 to be adjusted. The gap is located inside the coil 2. The gap may be an air gap. The gap may be made of a non-magnetic material, such as resin or ceramics. If there is no gap, the first middle core portion 31a and the second middle core portion 31b are in contact with each other, and there is substantially no gap between the first middle core portion 31a and the second middle core portion 31b.

[0041] (Side core section) As shown in Figure 1, the side core section 33 is positioned outside the coil 2. The side core section 33 is positioned on both sides of the coil 2. There are two side core sections 33. The side core section 33 has a first side core section 331 and a second side core section 332. The first side core section 331 and the second side core section 332 are spaced apart from each other in the Y-axis direction.

[0042] The side core portion 33 is arranged in parallel with the middle core portion 31. The first end of the side core portion 33 is connected to the first end core portion 35a, which will be described later. The second end of the side core portion 33 is connected to the second end core portion 35b, which will be described later.

[0043] (End core section) As shown in Figure 1, the end core portion 35 is positioned outside the coil 2. The end core portion 35 is positioned facing each end of the coil 2. There are two end core portions 35. The end core portion 35 has a first end core portion 35a and a second end core portion 35b. The first end core portion 35a faces the first end 2a of the coil 2. The second end core portion 35b faces the second end 2b of the coil 2. The first end core portion 35a and the second end core portion 35b are spaced apart in the X-axis direction.

[0044] (First core, second core) In this embodiment, the magnetic core 3 comprises a first core 3a and a second core 3b, as shown in Figure 2. The magnetic core 3 is formed by combining the first core 3a and the second core 3b. The shapes of the first core 3a and the second core 3b can be selected from various combinations. In this embodiment, the first core 3a has a T-shape, and the second core 3b has an E-shape. In other words, the magnetic core 3 is an ET-type core, which is a combination of an E-shaped core and a T-shaped core. The magnetic core 3 may be, for example, an EE-type core, an EI-type core, or a UT-type core. An EE-type core is a structure in which E-shaped cores are combined. An EI-type core is a structure in which an E-shaped core and an I-shaped core are combined. A UT-type core is a structure in which a U-shaped core and a T-shaped core are combined.

[0045] In this embodiment, the first core 3a has a first end core portion 35a and a first middle core portion 31a. The first end core portion 35a and the first middle core portion 31a are integrally molded. The first core 3a is a single molded product. The shape of the first core 3a is T-shaped in plan view. In Figure 2, the boundary between the first end core portion 35a and the middle core portion 31 is shown by a dashed line.

[0046] In this embodiment, the second core 3b has a second end core portion 35b, a second middle core portion 31b, a first side core portion 331, and a second side core portion 332. The second end core portion 35b, the second middle core portion 31b, the first side core portion 331, and the second side core portion 332 are integrally molded. The second core 3b is a single molded product. In plan view, the shape of the second core 3b is E-shaped. In Figure 2, the boundary between the second end core portion 35b and the middle core portion 31, and the boundary between the second end core portion 35b and the side core portion 33 are shown by dashed lines.

[0047] The first core 3a and the second core 3b are each composed of molded bodies of soft magnetic material. The molded bodies are, for example, compacted powder bodies or molded bodies of composite materials.

[0048] The compacted article is formed by compressing and molding raw material powder containing soft magnetic powder. The compacted article has a higher soft magnetic powder content compared to molded articles made of composite materials. Therefore, the compacted article has higher magnetic properties compared to molded articles made of composite materials. Magnetic properties include, for example, relative permeability and saturation magnetic flux density. The compacted article may contain, for example, either a binder resin or a molding aid. The soft magnetic powder content in the compacted article is, for example, 85% to 99.99% by volume when the compacted article is considered to be 100% by volume.

[0049] A molded composite material is formed by dispersing soft magnetic powder in a resin. The molded composite material is obtained by filling a mold with a fluid material containing dispersed soft magnetic powder in an unsolidified resin, and then solidifying the resin. The content of soft magnetic powder in the molded composite material can be easily adjusted. Therefore, the magnetic properties of the molded composite material are easily controlled. The content of soft magnetic powder in the molded composite material is, for example, 20% to 80% by volume, when the molded composite material is considered to be 100% by volume.

[0050] The particles constituting the soft magnetic powder are at least one selected from the group consisting of soft magnetic metal particles, coated particles having an insulating coating on the outer circumference of the soft magnetic metal particles, and soft magnetic nonmetal particles. The soft magnetic metal is, for example, pure iron or an iron-based alloy. The iron-based alloy is, for example, an Fe (iron)-Si (silicon) alloy or an Fe-Ni (nickel) alloy. The insulating coating is, for example, a phosphate. The soft magnetic nonmetal is, for example, ferrite.

[0051] The first core 3a and the second core 3b may be made of the same material or different materials. In this embodiment, the first core 3a is made of a molded composite material, and the second core 3b is made of a compacted powder molded body.

[0052] (Retaining member) The configuration of the retaining member 4 will be explained with reference to Figures 4 to 8. In the following explanation, Figures 2 and 3 will be referenced as appropriate for the configuration of the coil 2. Figures 1 and 2 will be referenced as appropriate for the configuration of the magnetic core 3. The coil 2 to which the retaining member 4 is assembled may be called the "coil assembly". Figure 6 is a view of the retaining member 4 from the right. Figure 7 is a view of the retaining member 4 from the left. Figure 8 is a view of the retaining member 4 from below. The retaining member 4 positions the coil 2 relative to the magnetic core 3 and ensures electrical insulation between the coil 2 and the magnetic core 3. The retaining member 4 is made of resin. As shown in Figures 4 and 5, the retaining member 4 has a first retaining member 4a and a second retaining member 4b. The first retaining member 4a and the second retaining member 4b are independent parts of each other. Either the first retaining member 4a or the second retaining member 4b has a first connecting portion 51. The first connecting portion 51 will be described later.

[0053] (First retaining member) The first retaining member 4a is a component positioned at the first end 2a of the coil 2 shown in Figure 2. As shown in Figures 4 and 5, the first retaining member 4a has a first main body portion 40a and a first insertion portion 41a. The first main body portion 40a is the part that contacts the first end 2a. The first insertion portion 41a is the part into which the first terminal portion 21a is inserted. The first main body portion 40a and the first insertion portion 41a are molded as a single unit.

[0054] <First main body section> The first main body portion 40a is positioned between the first end 2a and the first end core portion 35a. The first main body portion 40a ensures electrical insulation between the coil 2 and the first end core portion 35a. As shown in Figure 5, the first main body portion 40a has a frame-like shape corresponding to the end face of the first end 2a. In this embodiment, the shape of the first main body portion 40a is a rectangular frame.

[0055] The surface of the first main body portion 40a that contacts the end face of the first end 2a is an inclined surface that follows the spiral of the coil 2. In other words, the thickness of the four sides constituting the first main body portion 40a increases sequentially along the direction circumferential to the first main body portion 40a.

[0056] The first main body portion 40a has an opening 46. In the state shown in Figure 1, where the middle core portion 31 is arranged inside the coil 2, the first end of the middle core portion 31 is positioned in the opening 46. The shape of the opening 46 is roughly corresponding to the cross-section of the first middle core portion 31a. In this embodiment, the shape of the opening 46 is substantially rectangular.

[0057] Furthermore, the first main body portion 40a has a plurality of protrusions 47 that project into the opening 46. Each protrusion 47 protrudes from the inner circumferential surface of the first main body portion 40a that constitutes the opening 46. When the first holding member 4a is assembled to the coil 2, each protrusion 47 protrudes inward from the inner circumferential surface of the coil 2. When the middle core portion 31 is placed inside the coil 2, each protrusion 47 contacts the outer circumferential surface of the first end of the middle core portion 31. With this configuration, a gap is formed between the inner circumferential surface of the coil 2 and the outer circumferential surface of the middle core portion 31. This gap ensures electrical insulation between the coil 2 and the middle core portion 31. In this embodiment, of the four sides constituting the first main body portion 40a, one protrusion 47 is provided on each side facing each other in the Z-axis direction, and two protrusions 47 are provided on each side facing each other in the Y-axis direction. The size and shape of the protrusions 47 provided on the sides facing each other in the Z-axis direction are the same. The size and shape of the protrusions 47 provided on the sides facing each other in the Y-axis direction are the same. The shapes of the protrusions 47 on opposite sides in the Z-axis direction and the shapes of the protrusions 47 on opposite sides in the Y-axis direction are different. The shape, number, and position of the protrusions 47 on the first main body 40a may be changed as appropriate.

[0058] As shown in Figure 4, when the first retaining member 4a is assembled to the coil 2, the first main body portion 40a is positioned relative to the first end 2a.

[0059] <First Insertion Section> As shown in Figure 4, the first insertion portion 41a has a through hole 42a into which the first terminal portion 21a is inserted. The first insertion portion 41a is provided at a position from which the first terminal portion 21a is pulled out. In this embodiment, the first insertion portion 41a is provided at a position corresponding to the corner between the first surface 231 and the third surface 233 at the first end 2a of the coil 2 shown in Figure 3. In the first main body portion 40a, the portion where the first insertion portion 41a is provided is locally thickened.

[0060] The through-hole 42a penetrates in a direction perpendicular to the axis of the coil 2. Specifically, the through-hole 42a penetrates in the direction from which the first terminal portion 21a is pulled out. The through-hole 42a opens on the surface of the first insertion portion 41a that corresponds to the first surface 231 from which the first terminal portion 21a protrudes. The shape of the opening of the through-hole 42a corresponds to the shape of the cross-section of the first terminal portion 21a. In this embodiment, the through-hole 42a is a flat rectangular hole corresponding to the shape of the flat rectangular wire constituting the coil 2. The position of the first terminal portion 21a is restricted when the first terminal portion 21a is inserted into the through-hole 42a. The tip of the first terminal portion 21a protruding from the first insertion portion 41a is restricted from shifting in the direction along the axis of the coil 2, i.e., in the X-axis direction, relative to the first insertion portion 41a. This improves the positional accuracy of the first terminal portion 21a.

[0061] (Second retaining member) The second retaining member 4b is a component positioned at the second end 2b of the coil 2 shown in Figure 2. As shown in Figures 4 and 5, the second retaining member 4b has a second main body portion 40b. The second main body portion 40b is the part that contacts the second end 2b. In this embodiment, the second retaining member 4b further has a second insertion portion 41b. The second insertion portion 41b is the part into which the second terminal portion 21b is inserted. The second main body portion 40b and the second insertion portion 41b are molded integrally.

[0062] <Second body part> The second main body portion 40b is positioned between the second end 2b and the second end core portion 35b. The second main body portion 40b ensures electrical insulation between the coil 2 and the second end core portion 35b. As shown in Figure 5, the second main body portion 40b has a frame-like shape corresponding to the end face of the second end 2b. In this embodiment, the shape of the second main body portion 40b is a rectangular frame.

[0063] The surface of the second main body 40b that contacts the end face of the second end 2b is an inclined surface that follows the spiral of the coil 2. In other words, the thickness of the four sides constituting the second main body 40b increases sequentially along the direction that circles the second main body 40b.

[0064] The second main body portion 40b has an opening 46. In the state shown in Figure 1, where the middle core portion 31 is arranged inside the coil 2, the second end of the middle core portion 31 is positioned in the opening 46. The shape of the opening 46 is roughly corresponding to the cross-section of the second middle core portion 31b. In this embodiment, the shape of the opening 46 is substantially rectangular.

[0065] Furthermore, the second main body portion 40b has a plurality of protrusions 47 that project into the opening 46. Each protrusion 47 protrudes from the inner circumferential surface of the second main body portion 40b that constitutes the opening 46. When the second holding member 4b is assembled to the coil 2, each protrusion 47 protrudes inward from the inner circumferential surface of the coil 2. When the middle core portion 31 is placed inside the coil 2, each protrusion 47 contacts the outer circumferential surface of the second end of the middle core portion 31. With this configuration, a gap is formed between the inner circumferential surface of the coil 2 and the outer circumferential surface of the middle core portion 31. This gap ensures electrical insulation between the coil 2 and the middle core portion 31. In this embodiment, similar to the first main body portion 40a, one protrusion 47 is provided on each of the four sides constituting the second main body portion 40b that face each other in the Z-axis direction, and two protrusions 47 are provided on each of the sides that face each other in the Y-axis direction. The shape, number, and position of the protrusions 47 on the second main body portion 40b may be changed as appropriate.

[0066] As shown in Figure 4, when the second retaining member 4b is assembled to the coil 2, the second main body portion 40b is positioned relative to the second end portion 2b.

[0067] <Second Insertion> As shown in Figure 4, the second insertion portion 41b has a through hole 42b into which the second terminal portion 21b is inserted. The second insertion portion 41b is provided at a position from which the second terminal portion 21b is pulled out. In this embodiment, the second insertion portion 41b is provided at a position corresponding to the corner between the second surface 232 and the third surface 233 at the second end 2b of the coil 2 shown in Figure 3.

[0068] The through-hole 42b penetrates in a direction along the axis of the coil 2. The shape of the opening of the through-hole 42b corresponds to the shape of the cross-section of the second terminal portion 21b. In this embodiment, the through-hole 42b, like the through-hole 42a, is a flat rectangular hole corresponding to the shape of the flat wire. The position of the second terminal portion 21b is restricted when the second terminal portion 21b is inserted into the through-hole 42b. The tip of the second terminal portion 21b protruding from the second insertion portion 41b is restricted from shifting in a direction perpendicular to the axis of the coil 2 relative to the second insertion portion 41b, i.e., in the Y-axis direction. This improves the positional accuracy of the second terminal portion 21b.

[0069] <First connection part> The first connecting portion 51 will be described with reference to Figures 4 to 6. The first connecting portion 51 is arranged along a part of the outer circumferential surface 23 of the coil 2 shown in Figure 3. The first connecting portion 51 connects the first main body portion 40a and the second main body portion 40b. The first connecting portion 51 has a first coupling structure 53 that fits together with either the first main body portion 40a or the second main body portion 40b. The first holding member 4a and the second holding member 4b are coupled to each other by the first coupling structure 53. In this embodiment, the second holding member 4b has the first connecting portion 51. The first main body portion 40a and the first connecting portion 51 are coupled by the first coupling structure 53.

[0070] In this embodiment, the first connecting portion 51 is positioned along the first surface 231 of the outer circumferential surface 23 of the coil 2. The first connecting portion 51 is plate-shaped. The first connecting portion 51 covers a portion of the first surface 231. The first connecting portion 51 extends from the second main body portion 40b to the first main body portion 40a. The first connecting portion 51 is molded integrally with the second main body portion 40b. The tip of the first connecting portion 51 overlaps the outer circumferential surface of the first main body portion 40a. Unlike this embodiment, the first connecting portion 51 may be positioned along either the third surface 233 or the fourth surface 234.

[0071] <First bond structure> As shown in Figure 6, the first connecting structure 53 comprises a first recess 551 and a first protrusion 451 that fit together. In this embodiment, the first connecting portion 51 has the first recess 551, and the first main body portion 40a has the first protrusion 451. The first recess 551 is provided at the tip of the first connecting portion 51. The first protrusion 451 is provided on the outer circumferential surface of the first main body portion 40a at a position corresponding to the first recess 551. In this embodiment, the first protrusion 451 is provided on the same surface from which the through hole 42a opens. Of the four sides constituting the first main body portion 40a, the through hole 42a and the first protrusion 451 are provided on both sides of one side. The first protrusion 451 projects from the first main body portion 40a toward the second main body portion 40b. The first protrusion 451 projects in the direction along the axis of the coil 2, i.e., in the X-axis direction. Unlike this embodiment, the first protrusion 451 may not protrude in the X-axis direction, but may protrude only in the Y-axis direction from the outer circumferential surface of the first main body 40a. Unlike this embodiment, the first connecting portion 51 may be configured to have the first protrusion, and the first main body 40a may be configured to have the first recess. When the first connecting portion 51 has the first protrusion, the first protrusion protrudes from the tip of the first connecting portion 51 toward the first main body 40a.

[0072] The first retaining member 4a and the second retaining member 4b are positioned relative to each other by fitting the first recess 551 and the first protrusion 451 together. The first protrusion 451 does not need to be inserted all the way into the first recess 551. In other words, the tip of the first protrusion 451 does not need to be in contact with the first recess 551, and a clearance may be formed between the tip of the first protrusion 451 and the first recess 551.

[0073] The first connecting structure 53 may be a snap-fit ​​structure, in addition to the configuration in which the first recess 551 is simply inserted into the first protrusion 451 as in this embodiment. Although not shown, in the case of a snap-fit ​​structure, the first protrusion is provided so as to overlap the outer surface of the first connecting portion 51. The first recess is provided on the outer surface of the first connecting portion 51. The outer surface of the first connecting portion 51 is the surface opposite to the inner surface that faces the outer peripheral surface 23 of the coil 2 shown in Figure 4. The first protrusion has a claw that fits into the first recess. This claw is provided at the tip of the first protrusion. When the claw of the first protrusion is fitted into the first recess, the first protrusion is hooked into the first recess. The first recess is a through hole or blind hole into which the claw is fitted.

[0074] The first bonding structure 53 connects the first retaining member 4a and the second retaining member 4b to each other. Because the first retaining member 4a and the second retaining member 4b are positioned, misalignment between the first main body 40a and the second main body 40b is less likely to occur. The first end 2a and the second end 2b of the coil 2 are positioned, respectively, which stabilizes the shape of the coil 2.

[0075] <Second connection part> In this embodiment, the second retaining member 4b further has a second connecting portion 52. The second connecting portion 52 will be described with reference to Figures 4, 5, and 7. The second connecting portion 52 connects the first main body portion 40a and the second main body portion 40b. As shown in Figure 7, the first main body portion 40a and the second connecting portion 52 have a second coupling structure 54 that fits together with each other. The first main body portion 40a and the second connecting portion 52 are connected by the second coupling structure 54.

[0076] The second connecting portion 52 is positioned on a different surface of the outer circumferential surface 23 of the coil 2 from the surface on which the first connecting portion 51 is positioned. In this embodiment, the second connecting portion 52 is positioned along the second surface 232. The shape of the second connecting portion 52 is plate-like. The second connecting portion 52 covers a portion of the second surface 232. The second connecting portion 52 extends from the second main body portion 40b to the first main body portion 40a. The second connecting portion 52 is molded integrally with the second main body portion 40b. The tip of the second connecting portion 52 overlaps the outer circumferential surface of the first main body portion 40a. Unlike this embodiment, the second connecting portion 52 may be positioned along either the third surface 233 or the fourth surface 234.

[0077] <Second bond structure> As shown in Figure 7, the second coupling structure 54 comprises a second recess 552 and a second protrusion 452 that fit together. In this embodiment, the second connecting portion 52 has the second recess 552, and the first main body portion 40a has the second protrusion 452. The second recess 552 is provided at the tip of the second connecting portion 52. The second protrusion 452 is provided on the outer circumferential surface of the first main body portion 40a at a position corresponding to the second recess 552. The second protrusion 452 projects from the first main body portion 40a toward the second main body portion 40b. The second protrusion 452 projects in the direction along the axis of the coil 2, i.e., in the X-axis direction. Similar to the first coupling structure 53 described above, the second protrusion 452 may not project in the X-axis direction, but may project only in the direction opposite to the Y-axis direction from the outer circumferential surface of the first main body portion 40a. Unlike this embodiment, the second connecting portion 52 may be configured to have the second protrusion, and the first main body portion 40a may have the second recess.

[0078] The first retaining member 4a and the second retaining member 4b are positioned relative to each other by fitting the second recess 552 and the second protrusion 452 together. The second protrusion 452 does not need to be inserted all the way into the second recess 552. In other words, the tip of the second protrusion 452 does not need to be in contact with the second recess 552, and a clearance may be formed between the tip of the second protrusion 452 and the second recess 552.

[0079] The second coupling structure 54 may be a snap-fit ​​structure, similar to the first coupling structure 53 described above. Although not shown, in the case of a snap-fit ​​structure, the second protrusion is provided so as to overlap the outer surface of the second connecting portion 52. The second recess is provided on the outer surface of the second connecting portion 52. The outer surface of the second connecting portion 52 is the surface opposite to the inner surface that faces the outer peripheral surface 23 of the coil 2 shown in Figure 4. The second protrusion has a claw that fits into the second recess. This claw is provided at the tip of the second protrusion. When the claw of the second protrusion is fitted into the second recess, the second protrusion is hooked into the second recess. The second recess is a through hole or blind hole into which the claw is fitted.

[0080] In this embodiment, the first retaining member 4a and the second retaining member 4b are connected to each other by the first connecting structure 53 and the second connecting structure 54. Because the first retaining member 4a and the second retaining member 4b are positioned by the two connecting structures, misalignment between the first main body portion 40a and the second main body portion 40b is less likely to occur. The shape of the coil 2 is more stable.

[0081] In this embodiment, the first main body portion 40a has a first protrusion 451 and a second protrusion 452. As shown in Figure 8, the second protrusion 452 is smaller than the first protrusion 451. Specifically, the protrusion length of the second protrusion 452 is smaller than the protrusion length of the first protrusion 451. The protrusion length is the dimension in the X-axis direction. Specifically, the protrusion lengths of the first protrusion 451 and the second protrusion 452 are the distances from the surface 401 that contacts the end face of the first end 2a of the first main body portion 40a to the tips of the respective protrusions.

[0082] (Method of assembling the retaining member) The coil assembly shown in Figure 4 is obtained by assembling the retaining member 4 to the coil 2. The method for assembling the retaining member 4 to the coil 2 will now be explained. The retaining member 4 is assembled to the coil 2 by first assembling the first retaining member 4a to the coil 2, and then assembling the second retaining member 4b to the coil 2.

[0083] A method for assembling the first retaining member 4a to the coil 2 will now be described. The first main body portion 40a is slid along the end face of the first end 2a so that the first terminal portion 21a is inserted into the through hole 42a. In other words, the coil 2 is slid in a direction in which the first terminal portion 21a protrudes relative to the first retaining member 4a. This allows the first retaining member 4a to be assembled to the first end 2a. In this embodiment, the sliding direction of the coil 2 is the Y-axis direction.

[0084] A method for assembling the second retaining member 4b to the coil 2 will now be described. The second retaining member 4b is moved in a direction along the axis of the coil 2 so that the second terminal portion 21b is inserted into the through hole 42b. This allows the second retaining member 4b to be assembled to the second end 2b. When the second retaining member 4b is assembled to the coil 2, the first convex portion 451 and the second convex portion 452 are fitted into the first recess 551 and the second recess 552, respectively.

[0085] In this embodiment, when the coil 2 is slid and assembled to the first holding member 4a, the outer circumferential surface 23 of the coil 2 is brought into contact with the first protrusion 451 provided on the first main body portion 40a. Specifically, the first surface 231 is brought into contact with the first protrusion 451. By bringing the outer circumferential surface 23 of the coil 2 into contact with the first protrusion 451, it is easier to position the first main body portion 40a at the first end 2a. In addition, in this embodiment, the second surface 232 comes into contact with the second protrusion 452, which makes it easier to position the first main body portion 40a relative to the first end 2a.

[0086] Unlike this embodiment, the first retaining member 4a may have a first connecting portion 51. If the first retaining member 4a has a first connecting portion 51, the first surface 231 is pressed against the first connecting portion 51.

[0087] In this embodiment, as shown in Figure 8 above, the second protrusion 452 is smaller than the first protrusion 451. Therefore, the second protrusion 452 is less likely to get in the way when sliding the coil 2 and assembling it to the first holding member 4a. The protruding length of the second protrusion 452 is such that it does not hinder the sliding of the coil 2.

[0088] (Resin molded component) The reactor 1 may include a resin molded member (not shown). The resin molded member covers at least a portion of the outer circumferential surface of the magnetic core 3. The resin molded member integrates the first core 3a and the second core 3b. The resin molded member also integrates the coil 2 and the magnetic core 3. The resin molded member is formed with the coil 2 positioned relative to the magnetic core 3 by a holding member 4. The resin molded member may cover the outer circumferential surface 23 of the coil 2. The resin molded member may be formed so that either the third surface 233 or the fourth surface 234 of the coil 2 is exposed.

[0089] (How to assemble the reactor) The reactor 1 is manufactured by assembling the coil assembly described above onto the magnetic core 3. An example of how to assemble the reactor is described below. The first core 3a is positioned so that the first middle core portion 31a is inserted into the coil 2, and the second core 3b is positioned so that the second middle core portion 31b is inserted into the coil 2. In this way, the coil 2 is assembled onto the magnetic core 3. The first end and second end of the middle core portion 31 are inserted into the openings 46 of the first main body portion 40a of the first retaining member 4a and the second main body portion 40b of the second retaining member 4b, respectively. After assembling the coil 2 onto the magnetic core 3, the coil 2 and the magnetic core 3 may be integrated using the resin molded member described above. The resin molded member is formed by placing the assembly of the coil 2 and the magnetic core 3 in a mold and then filling the mold with resin. The resin molded member can be molded, for example, by injection molding. The gaps formed on both sides of the projections 47 in the first main body portion 40a and the second main body portion 40b are the resin molded portion Material During the molding process, it functions as an inlet for introducing resin between the coil 2 and the middle core section 31.

[0090] In this embodiment, the shape of the coil 2 is stabilized as described above by assembling the holding member 4 to the coil 2. The stabilization of the coil 2's shape makes it easier to assemble the coil 2 to the magnetic core 3. As a result of improved positional accuracy of the coil 2 relative to the magnetic core 3, variations in the electromagnetic performance of the reactor 1 can be suppressed. Therefore, the productivity of the reactor 1 is improved. The positions of the first terminal portion 21a and the second terminal portion 21b are restricted as described above by inserting them into the through-hole 42a of the first insertion portion 41a and the through-hole 42b of the second insertion portion 41b, respectively. As a result of improved positional accuracy of the first terminal portion 21a and the second terminal portion 21b, the ease of connecting each terminal portion to the busbar is improved.

[0091] [Differentiation] A modified example of the above-described embodiment will now be explained with reference to Figures 9 to 11. In the modified example, as shown in Figure 9, the direction in which the second terminal portion 21b is pulled out differs from that of the coil 2 described in the embodiment. Also, the configurations of the first retaining member 4a and the second retaining member 4b differ from those of the retaining member 4 described in the embodiment. The following explanation will focus on the differences from the embodiment. Components similar to those in the embodiment are denoted by the same reference numerals and their description is omitted.

[0092] The second terminal portion 21b is drawn out in a direction perpendicular to the axis of the coil 2. When viewed from a direction along the axis of the coil 2, the second terminal portion 21b protrudes from the second surface 232 shown in Figure 3. The direction in which the second terminal portion 21b is drawn out is opposite to the direction in which the first terminal portion 21a is drawn out.

[0093] In a modified example, as shown in Figures 9 and 10, the first retaining member 4a has a first connecting portion 51 arranged along the first surface 231. The first connecting portion 51 extends from the first main body portion 40a to the second main body portion 40b. The first connecting portion 51 is integrally molded with the first main body portion 40a. The tip of the first connecting portion 51 overlaps the outer circumferential surface of the second main body portion 40b. The second main body portion 40b and the first connecting portion 51 are connected by a first connecting structure 53. The first connecting portion 51 has a first recess 551, and the second main body portion 40b has a first protrusion 451. The first protrusion 451 projects from the second main body portion 40b toward the first main body portion 40a.

[0094] In a modified example, as shown in Figure 11, the second retaining member 4b has a second connecting portion 52 arranged along the second surface 232 shown in Figure 3. The first main body portion 40a and the second connecting portion 52 are connected by a second connecting structure 54. The second connecting portion 52 has a second recess 552, and the first main body portion 40a has a second protrusion 452.

[0095] The second insertion portion 41b of the second retaining member 4b has a through hole 42b into which the second terminal portion 21b is inserted. The second insertion portion 41b is provided at the position from which the second terminal portion 21b shown in Figure 9 is pulled out. The through hole 42b penetrates in the direction from which the second terminal portion 21b is pulled out. The through hole 42b opens on the surface of the second insertion portion 41b that corresponds to the second surface 232 from which the second terminal portion 21b protrudes.

[0096] The retaining member 4 is assembled to the coil 2 as follows: The first retaining member 4a is assembled to the first end 2a by sliding the coil 2 in the direction in which the first end portion 21a protrudes. Next, the second retaining member 4b is assembled to the second end 2b by sliding the coil 2 in the direction in which the second end portion 21b protrudes. The sliding direction of the coil 2 when assembling the second retaining member 4b is opposite to the sliding direction of the coil 2 when assembling the first retaining member 4a. The order in which the first retaining member 4a and the second retaining member 4b are assembled does not matter.

[0097] <Converters / Power Converters> The reactor 1 of this embodiment can be used for applications that meet the following energizing conditions. These conditions include, for example, a maximum DC current of approximately 100A to 1000A, an average voltage of approximately 100V to 1000V, and an operating frequency of approximately 5kHz to 100kHz. The reactor 1 of this embodiment can typically be used as a component of a converter mounted in vehicles such as electric vehicles and hybrid vehicles, and as a component of a power conversion device equipped with this converter. Because the reactor 1 of this embodiment has excellent productivity, it can improve the productivity of converters and power conversion devices.

[0098] As shown in Figure 12, a vehicle 1200 such as a hybrid vehicle or electric vehicle includes a main battery 1210, a power converter 1100 connected to the main battery 1210, and a motor 1220 that is driven by power supplied from the main battery 1210 and used for driving. The motor 1220 is typically a three-phase AC motor. The motor 1220 drives the wheels 1250 when driving and functions as a generator during regeneration. In the case of a hybrid vehicle, the vehicle 1200 is equipped with an engine 1300 in addition to the motor 1220. In Figure 12, an inlet is shown as the charging point of the vehicle 1200, but it can also be configured with a plug.

[0099] The power converter 1100 includes a converter 1110 connected to the main battery 1210 and an inverter 1120 connected to the converter 1110 that performs mutual conversion between DC and AC. In this example, the converter 1110 boosts the input voltage of the main battery 1210, which is approximately 200V to 300V, to approximately 400V to 700V when the vehicle 1200 is running, and supplies power to the inverter 1120. During regeneration, the converter 1110 steps down the input voltage output from the motor 1220 via the inverter 1120 to a DC voltage suitable for the main battery 1210, thereby charging the main battery 1210. The input voltage is a DC voltage. When the vehicle 1200 is running, the inverter 1120 converts the DC voltage boosted by the converter 1110 into a predetermined AC voltage and supplies power to the motor 1220. During regeneration, it converts the AC output from the motor 1220 into DC voltage and outputs it to the converter 1110.

[0100] As shown in Figure 13, the converter 1110 comprises a plurality of switching elements 1111, a drive circuit 1112 that controls the operation of the switching elements 1111, and a reactor 1115, and converts the input voltage by repeatedly switching ON / OFF. In this case, the input voltage conversion is step-up or step-down. Power devices such as field-effect transistors and insulated-gate bipolar transistors are used as switching elements 1111. The reactor 1115 utilizes the property of a coil that tries to oppose changes in the current that is about to flow through the circuit, and has the function of smoothing the change when the current tries to increase or decrease due to the switching operation. The reactor 1115 is provided as reactor 1 of the embodiment.

[0101] Vehicle 1200 includes, in addition to converter 1110, a power supply device converter 1150 connected to the main battery 1210, and an auxiliary power converter 1160 connected to the main battery 1210 and a sub-battery 1230 which serves as a power source for auxiliary equipment 1240, and which converts the high voltage of the main battery 1210 to low voltage. Converter 1110 typically performs DC-DC conversion, while the power supply device converter 1150 and the auxiliary power converter 1160 perform AC-DC conversion. Some power supply device converters 1150 also perform DC-DC conversion. The reactors of the power supply device converter 1150 and the auxiliary power converter 1160 have the same configuration as reactor 1 in the embodiment, and reactors with appropriately changed size or shape can be used. Furthermore, reactor 1 in the embodiment can also be used in converters that perform input power conversion, such as converters that only perform voltage boosting or converters that only perform voltage bucking. [Explanation of symbols]

[0102] 1 Reactor 2 coils 2a first end, 2b second end 21a First terminal section, 21b Second terminal section 23 outer peripheral surface, 231 first surface, 232 second surface, 233 third surface, 234 fourth surface 3 Magnetic core 3a First core, 3b Second core 31 Middle Core Section 31a First middle core section, 31b Second middle core section 33 Side core section 331 First side core section, 332 Second side core section 35 End core section 35a First end core section, 35b Second end core section 4. Retaining member 4a first holding member, 4b second holding member 40a first main body part, 40b second main body part 41a First insertion section, 41b Second insertion section 42a through hole, 42b through hole 46 openings, 47 protrusions 401 sides 51 First connection part, 52 Second connection part 53 First bond structure, 54 Second bond structure 451 First protrusion, 452 Second protrusion 551 First recess, 552 Second recess 1100 Power Converter, 1110 Converter 1111 Switching element, 1112 Drive circuit 1115 Reactor, 1120 Inverter 1150 Converter for power supply equipment, 1160 Converter for auxiliary power supply equipment 1200 vehicles 1210 main battery, 1220 motor 1230 Sub-battery, 1240 Auxiliary equipment, 1250 Wheels, 1300 Engine

Claims

1. Coil and, A retaining member and A magnetic core on which the coil is arranged, The aforementioned coil is The first terminal portion drawn out from the first end of the coil, It has a second terminal portion drawn out from the second end of the coil, The first terminal portion is drawn out from the first end in a direction perpendicular to the axis of the coil, The aforementioned retaining member is The first retaining member positioned at the first end, It has a second retaining member positioned at the second end, The first retaining member is The first main body portion that contacts the first end, It has a first insertion portion having a through hole into which the first terminal portion is inserted, The second retaining member is It has a second main body portion that is in contact with the second end, Either the first retaining member or the second retaining member is arranged along a part of the outer circumferential surface of the coil and has a first connecting portion that connects the first main body and the second main body. The first main body portion and the second main body portion and the first connecting portion have a first connecting structure that allows them to be fitted together. The first bonding structure comprises a first recess and a first protrusion, The shape of the aforementioned coil is a polygonal tube, The outer surface of the coil has a plurality of surfaces, including the first surface. The first terminal portion protrudes from the first surface when viewed from a direction along the axis of the coil, The second retaining member has the first connecting portion arranged along the first surface, The first main body portion has the first protrusion, The first connecting portion has the first recess, Reactor.

2. The second retaining member further has a second connecting portion that connects the first main body portion and the second main body portion. The second connecting portion is arranged along the second surface of the outer circumferential surface that is opposite to the first surface, The first main body and the second connecting part have a second connecting structure that fits together with each other. The reactor according to claim 1, wherein the second bonding structure comprises a second recess and a second protrusion.

3. The first main body portion has the second protrusion, The second connecting portion has the second recess, The reactor according to claim 2, wherein the second protrusion is smaller than the first protrusion.

4. The second terminal portion is drawn out from the second end in a direction along the axis of the coil, The reactor according to claim 1, wherein the second retaining member has a second insertion portion having a through hole into which the second terminal portion is inserted.

5. A reactor comprising the reactor described in any one of claims 1 to 4, converter.

6. A converter comprising the converter described in claim 5, Power conversion device.

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