Core unit

Abstract

To provide a core unit which can flow large current while securing high impedance.SOLUTION: A core unit includes a core having a through hole, a first conductor having conductivity and having a part penetrating through the through hole, and a spacer having insulating property. The first conductor includes a plate-like first member having a first projection region, a plate-like second member having a second projection region, and a plate-like third member having a first connection region electrically connected to the first projection region and a second connection region electrically connected to the second projection region. The first connection region overlaps the first projection region, and the second connection region overlaps the second projection region. The first member and the third member are connected to each other, and the second member and the third member are connected to each other. A nut is embedded in the spacer. The spacer penetrates through the through hole, and is connected to the first member.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a core unit.

Background Art

[0002] A technology relating to a common-mode choke coil using a composite magnetic core is disclosed (see, for example, Patent Document 1). According to the common-mode choke coil disclosed in Patent Document 1, a structure in which a conductive wire is wound around an annular core is adopted.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] In the method for manufacturing a noise filter by winding a conductive wire around an annular core to form a coil like the technology disclosed in Patent Document 1, it is necessary to make the conductive wire thin, and it is difficult to pass a large current through the conductive wire. Here, a method of removing noise by passing a relatively large conductor with a large cross-sectional area through a through hole provided in an annular magnetic core is conceivable. However, when large current and high voltage are required, noise is expected to increase, so it is required to ensure high impedance.

[0005] Therefore, an object of the present invention is to provide a core unit that can pass a large current while ensuring high impedance.

Means for Solving the Problem

[0006] A core unit according to this disclosure comprises a core having a through hole, and a first conductor having conductivity and a portion that penetrates the through hole. The first conductor includes a plate-shaped first member having a first protruding region that penetrates in a first direction which is the direction of penetration of the through hole and protrudes to the first side in the penetration direction, a plate-shaped second member arranged side by side with a gap between it and the first member in a second direction which is the width direction of the first member, having a second protruding region that penetrates in the first direction and protrudes to the second side in the penetration direction which is the opposite side to the first side, and a plate-shaped third member that passes on the outer circumference of the core and has a first connecting region electrically connected to the first protruding region and a second connecting region electrically connected to the second protruding region, thereby electrically connecting the first member and the second member. [Effects of the Invention]

[0007] According to the above core unit, it is possible to pass a large current while ensuring high impedance. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic perspective view showing the configuration of the core unit in Embodiment 1 of this disclosure. [Figure 2] Figure 2 is a schematic plan view of the core unit shown in Figure 1. [Figure 3] Figure 3 is a schematic side view of the core unit shown in Figure 1. [Figure 4] Figure 4 is a schematic front view of the core unit shown in Figure 1. [Figure 5] Figure 5 is a schematic cross-sectional view of the core unit shown in Figure 1. [Figure 6] Figure 6 is a schematic side view showing the core unit in Embodiment 2. [Figure 7] Figure 7 is a schematic front view of the core unit shown in Figure 6. [Figure 8] Figure 8 is a schematic perspective view showing the core unit in Embodiment 3. [Modes for carrying out the invention]

[0009] [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described. The core unit relating to this disclosure is: (1) The device comprises a core having a through hole and a first conductor having conductivity and a portion that penetrates the through hole. The first conductor includes a plate-shaped first member having a first protruding region that penetrates the through hole in a first direction which is the direction in which the through hole penetrates and protrudes to the first side in the direction in which the through hole penetrates; a plate-shaped second member arranged side by side with a gap between it and the first member in a second direction which is the width direction of the first member, having a second protruding region that penetrates the through hole in the first direction and protrudes to the second side in the direction in which the through hole penetrates, which is the opposite side to the first side; and a plate-shaped third member that passes on the outer circumference of the core and has a first connecting region electrically connected to the first protruding region and a second connecting region electrically connected to the second protruding region, thereby electrically connecting the first member and the second member.

[0010] According to the core unit described herein, the first member and the second member each have a portion that penetrates a through-hole provided in the core. Therefore, these first, second, and third members achieve a structure in which the first conductor wraps around the core, while the first and second members do not need to be flexible and can be flat. Thus, while a high impedance is ensured by the structure in which the first conductor wraps around the core, the use of flat members allows for handling of large currents. In summary, the above core unit can handle large currents while ensuring high impedance. Furthermore, since the first conductor can be assembled from either side of the through-hole in such a core unit, good workability can be ensured.

[0011] (2) In (1) above, when viewed from a third direction which is the thickness direction of the first member, the first connection region may overlap with the first protruding region, and the second connection region may overlap with the second protruding region. By doing so, the plate-like portions of the first member and the second member can be brought into contact with the third member, making it easier to efficiently pass a large current.

[0012] (3) In (1) or (2) above, the third member may be connected to at least one of the first member and the second member by fastening with bolts. By doing so, a strong connection can be achieved between at least one of the first member and the second member and the third member. Therefore, a large current can be carried while ensuring a more stable and high impedance.

[0013] (4) In any of (1) to (3) above, the third member may consist of a plurality of segmented members that are spaced apart in the second direction. The core unit may further include a plate-shaped intermediate member that penetrates a through hole in the first direction and has protruding regions that project out to the first side and the second side. The third member may electrically connect the first member and the second member via the plurality of segmented members and the intermediate member. In this way, the first member, second member, third member and intermediate member can achieve a structure in which the first conductor is wrapped around the core multiple times. Thus, an even higher impedance can be ensured.

[0014] (5) In any of (1) to (4) above, the core unit may further comprise a core case that houses the core and is insulating. The third member may pass around the outer circumference of the core case. In this way, the core can be protected by the core case while reducing the risk of contact between the core and the first conductor, thereby preventing damage to the core. Thus, the core unit can be used stably for a longer period of time.

[0015] In (6) above, the core case is annular and may include an inner wall portion that defines a space for accommodating the core. A groove extending in a first direction may be provided on the inner wall surface of the inner wall portion. At least one of the first member and the second member may have a portion fitted into the groove. With this configuration, at least one of the first portion and the second portion can be fitted by utilizing the groove provided on the inner wall surface of the inner wall portion of the core case, thereby improving assemblability, and the member fitted into the groove can be stably held by the core case.

[0016] In (7) above, in any one of (1) to (6) above, the core unit may further include a second conductor that has conductivity and has a portion penetrating the through hole. The second conductor comprises: a plate-shaped fourth member that penetrates the through hole in the first direction and has a third protruding region protruding to the first side; a plate-shaped fifth member that is arranged side by side with the fourth member at an interval in the second direction, penetrates the through hole in the first direction, and has a fourth protruding region protruding to the first side; and a plate-shaped sixth member that passes through the outer peripheral side of the core, has a third connection region electrically connected to the third protruding region and a fourth connection region electrically connected to the fourth protruding region, and electrically connects the fourth member and the fifth member. With this configuration, high impedance can be ensured while large currents in opposite directions flow through the first conductor and the second conductor. In this case, the first member and the fourth member, as well as the second member and the fifth member can be arranged to form parallel plates, so that magnetic fluxes can cancel each other out when reverse currents flow between the mutual conductors.

[0017] In (8) above, in (7) above, an insulating spacer that penetrates the through hole and is arranged between the first conductor and the second conductor may be further provided. With this configuration, the risk of contact between the first conductor and the second conductor can be greatly reduced. In addition, positioning using the spacer is facilitated, the respective postures of the first conductor and the second conductor are stabilized, and more stable use of the core unit can be ensured.

[0018] (9) In the above (7), at least one of the first conductor and the second conductor may be fixed to the spacer. With this configuration, the member fixed to the spacer can be handled as an integrated body, whereby assemblability can be improved. Further, the risk of the member fixed to the spacer falling off from the core unit can be greatly reduced.

[0019] (10) In any one of the above (7) to (9), the arrangement direction of the first protruding region and the fourth protruding region in the second direction may be opposite to the arrangement direction of the second protruding region and the third protruding region. With this configuration, for example, bolts can be respectively tightened from the third direction, and interference of tools during attachment of each member can be avoided. Therefore, productivity can be improved.

[0020] [Details of Embodiments of the Present Disclosure] Next, an embodiment of the core unit of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding portions are denoted by the same reference signs, and repeated description thereof will be omitted.

[0021] (Embodiment 1) The configuration of the core unit in Embodiment 1 of this disclosure will now be described. Figure 1 is a schematic perspective view showing the configuration of the core unit in Embodiment 1 of this disclosure. Figure 2 is a schematic plan view of the core unit shown in Figure 1. Figure 2 is a view from the direction indicated by arrow II in Figure 1. Figure 3 is a schematic side view of the core unit shown in Figure 1. Figure 3 is a view from the direction indicated by arrow III in Figure 1. Figure 4 is a schematic front view of the core unit shown in Figure 1. Figure 4 is a view from the direction indicated by arrow IV in Figure 1. Figure 5 is a schematic cross-sectional view of the core unit shown in Figure 1. Figure 5 is a cross-sectional view when cut along the line segment VV in Figures 1 and 2. In the drawings shown in Figure 1 and subsequent figures, the Y direction indicates the first direction, which is the core penetration direction described later; the Z direction indicates the second direction, which is the width direction of the first conductor described later; and the X direction indicates the third direction, which is the thickness direction of the first conductor. For ease of understanding, spacers described later may be shown with dashed lines in Figure 1 and other figures.

[0022] Referring to Figures 1 to 5, the core unit 10a in Embodiment 1 includes a first conductor 11a, a second conductor 12a, a core 13a, a core case 14a, and a spacer 15a. The core unit 10a is used, for example, as a common-mode noise filter. The first conductor 11a is used, for example, as an N-side busbar (a negative-side busbar for DC current), and the second conductor 12a is used, for example, as a P-side busbar (a positive-side busbar for DC current).

[0023] The core 13a has a through hole 16a (see Figure 5 in particular). That is, the core 13a is composed of an annular member. In this embodiment, the core 13a is a magnetic core, and specifically, for example, is manufactured by sintering multiple nanocrystalline foils that are wound circumferentially and stacked. The core 13a may also be composed of other materials, such as ferrite or amorphous material.

[0024] The core case 14a houses the core 13a. The core case 14a is insulating. The core case 14a is made of, for example, resin. The core case 14a is annular. The external shape of the core case 14a is a rectangular parallelepiped shape with a through hole 19a that penetrates in a first direction. When viewed from the Y direction, the through hole 19a of the core case 14a is smaller than the through hole 16a of the core 13a. This allows the core case 14a to house the core 13a. The core case 14a includes an inner wall portion 35a and an outer wall portion 36a that define the space for housing the core 13a. Furthermore, the core case 14a includes a pair of side walls located at both ends of the inner wall portion 35a and the outer wall portion 36a in the Y direction. The internal space of the core case 14a is sealed, and the core 13a is placed in that space. Grooves 17a and 18a are provided on the inner wall surface 37a of the inner wall portion 35a. Grooves 17a and 18a are provided so as to be recessed in the X direction toward the outer wall portion 36a. Grooves 17a and 18a are provided so as to extend along the first direction. Grooves 17a and 18a are provided so as to face each other in the X direction.

[0025] Next, the structure of the first conductor 11a will be described. The first conductor 11a is electrically conductive. The first conductor 11a has a portion that penetrates the through hole 16a. The first conductor 11a includes a first member 21a, a second member 22a, and a third member 23a. The first member 21a, the second member 22a, and the third member 23a are each made from a strip-shaped metal plate. The first member 21a and the second member 22a are each plate-shaped, specifically flat plates. The third member 23a is plate-shaped, and is formed, for example, by bending a flat metal plate.

[0026] The first member 21a is positioned to extend along a first direction. The first member 21a penetrates the through hole 16a of the core 13a in the first direction, Y direction. The arrow Y points from the second side to the first side. The first member 21a is fitted into the groove 17a. The first member 21a is provided with a first connection hole 31a on the first side and a first fastening hole 41a on the second side. The first connection hole 31a and the first fastening hole 41a penetrate through the first member 21a in the thickness direction. The first connection hole 31a is used, for example, when connecting another member that carries current to the first member 21a. The first member 21a has a first protruding region 51a that protrudes to the second side.

[0027] The second member 22a is arranged in the second direction, the Z direction, with a gap between it and the first member 21a. In this embodiment, in the second direction, the first member 21a is positioned on the upper side and the second member 22a is positioned on the lower side. The second member 22a is positioned to extend along the first direction, similar to the first member 21a. The second member 22a also penetrates the through hole 16a of the core 13a in the first direction. The second member 22a is fitted into the groove 18a. The second member 22a is provided with a second connection hole 32a on the second side and a second fastening hole 42a on the first side. The second connection hole 32a and the second fastening hole 42a penetrate through the second member 22a in the thickness direction. The second connection hole 32a is used, for example, when connecting another member that carries current to the second member 22a. The second member 22a has a second protruding region 52a that protrudes toward the first side.

[0028] The third member 23a passes through the outer circumference of the core 13a. In this embodiment, the third member 23a passes through the outer circumference of the core case 14a. The third member 23a includes a first connection region 61a electrically connected to the first protruding region 51a, and a second connection region 62a electrically connected to the second protruding region 52a. The first connection region 61a is a region that protrudes to the first side. The second connection region 62a is a region that protrudes to the second side. When viewed from the third direction, the X direction, the first connection region 61a overlaps with the first protruding region 51a. Also, when viewed from the X direction, the second connection region 62a overlaps with the second protruding region 52a. The first connection region 61a and the second connection region 62a are connected by a first inclined region 71a that is inclined with respect to the Y direction and the Z direction, respectively. The first connection region 61a and the second connection region 62a are each provided with through holes that penetrate in the thickness direction.

[0029] In this embodiment, the third member 23a is in contact with the first protruding region 51a of the first member 21a in the first connection region 61a. The third member 23a is fastened to the first member 21a by a bolt 81a. The fastening with the bolt 81a utilizes the first fastening hole 41a and a through hole provided in the first connection region 61a. Furthermore, the third member 23a is in contact with the second protruding region 52a of the second member 22a in the second connection region 62a. The third member 23a is fastened to the second member 22a by a bolt 82a. The fastening with the bolt 82a utilizes the second fastening hole 42a and a through hole provided in the second connection region 62a. With this configuration, in the first conductor 11a, the first member 21a and the second member 22a are electrically connected via the third member 23a. Then, current can be passed from the first member 21a through the third member 23a to the second member 22a.

[0030] Next, the structure of the second conductor 12a will be described. The second conductor 12a, like the first conductor 11a, is conductive. The second conductor 12a has a portion that penetrates the through hole 16a. The second conductor 12a is positioned at a distance from the first conductor 11a in the X direction. The second conductor 12a includes a fourth member 24a, a fifth member 25a, and a sixth member 26a. The fourth member 24a, the fifth member 25a, and the sixth member 26a are each made of a strip-shaped metal plate, similar to the first member 21a, the second member 22a, and the third member 23a. The fourth member 24a and the fifth member 25a are each plate-shaped, specifically flat plates. The sixth member 26a is plate-shaped, and is formed, for example, by bending a flat metal plate.

[0031] The fourth member 24a is positioned to extend along the first direction. The fourth member 24a penetrates the through hole 16a of the core 13a in the first direction. The fourth member 24a is fitted into the groove 18a. The fourth member 24a is provided with a third connection hole 33a on the second side and a third fastening hole on the first side. The third connection hole 33a and the third fastening hole penetrate through the fourth member 24a in the thickness direction. The third connection hole 33a is used, for example, when connecting another member that carries current to the fourth member 24a. The fourth member 24a has a third protruding region 53a that projects to the first side.

[0032] The fifth member 25a is arranged in the second direction with a gap between it and the fourth member 24a. In this embodiment, in the second direction, the fourth member 24a is positioned on the upper side and the fifth member 25a is positioned on the lower side. The fifth member 25a is arranged to extend along the first direction, similar to the fourth member 24a. The fifth member 25a also penetrates the through hole 16a of the core 13a in the first direction. The fifth member 25a is fitted into the groove 18a. The fifth member 25a is provided with a fourth connection hole 34a on the first side and a fourth fastening hole on the second side. The fourth connection hole 34a and the fourth fastening hole penetrate through the fifth member 25a in the thickness direction. The fourth connection hole 34a is used, for example, when connecting another member that carries current to the fifth member 25a. The fifth member 25a has a fourth protruding region 54a that protrudes to the second side.

[0033] The sixth member 26a passes along the outer circumference of the core 13a. In this embodiment, the sixth member 26a passes along the outer circumference of the core case 14a. Also in this embodiment, the sixth member 26a is positioned on the opposite side of the third member 23a, with the core case 14a in between, in the third direction. The sixth member 26a includes a third connection region 63a electrically connected to the third protruding region 53a, and a fourth connection region 64a electrically connected to the fourth protruding region 54a. The third connection region 63a is a region that protrudes to the second side. The fourth connection region 64a is a region that protrudes to the first side. When viewed from the third direction, the third connection region 63a overlaps with the third protruding region 53a. Also, when viewed from the X direction, the fourth connection region 64a overlaps with the fourth protruding region 54a. The third connection region 63a and the fourth connection region 64a are connected by a second inclined region 72a that is inclined with respect to the Y and Z directions, respectively. The third connection region 63a and the fourth connection region 64a are each provided with through holes that penetrate in the thickness direction.

[0034] In this embodiment, the sixth member 26a is in contact with the third protruding region 53a of the fourth member 24a in the third connection region 63a. The sixth member 26a is fastened to the fourth member 24a by a bolt 83a. The third fastening hole and a through hole provided in the third connection region 63a are used for fastening with the bolt 83a. The sixth member 26a is also in contact with the fourth protruding region 54a of the fifth member 25a in the fourth connection region 64a. The sixth member 26a is fastened to the fifth member 25a by a bolt 84a. The fourth fastening hole and a through hole provided in the fourth connection region 64a are used for fastening with the bolt 84a. With this configuration, the fourth member 24a and the fifth member 25a are electrically connected in the second conductor 12a via the sixth member 26a. Then, current can be passed from the fourth member 24a through the sixth member 26a to the fifth member 25a.

[0035] Here, regarding the arrangement of the first conductor 11a and the second conductor 12a, the orientation in which the first protruding region 51a and the fourth protruding region 54a are arranged in the second direction (Z direction) (opposite to the direction indicated by arrow Z) is opposite to the orientation in which the second protruding region 52a and the third protruding region 53a are arranged (opposite to the direction indicated by arrow Z) (see Figure 3 in particular).

[0036] Spacer 15a is insulating. Spacer 15a is made of, for example, resin. Spacer 15a is a flat plate with its thickness direction as the third direction. Spacer 15a is positioned to pass through the through hole 16a of core 13a and the through hole of core case 14a. Spacer 15a is positioned between the first conductor 11a and the second conductor 12a in the third direction. Nuts 85a, 86a, 87a, and 88a are embedded in spacer 15a. That is, nuts 85a, 86a, 87a, and 88a are inserted into spacer 15a. Viewed from the third direction, nuts 85a, 86a, 87a, and 88a are provided at positions corresponding to the first fastening hole 41a, the second fastening hole 42a, the third fastening hole, and the fourth fastening hole, respectively. Each nut 85a, nut 86a, nut 87a, and nut 88a is insulated from each other by a spacer 15a.

[0037] Next, the energization in the core unit 10a will be explained. First, for example, with respect to the first conductor 11a used as an N-side busbar, the current flowing from the first side of the first member 21a where the first connection hole 31a is provided flows through the first member 21a in a first direction, from the first protruding region 51a to the first connection region 61a of the third member 23a. Then, from the first connection region 61a, it flows through the interior of the third member 23a via the first inclined region 71a to the second connection region 62a. Then, from the second connection region 62a, it goes to the second protruding region 52a of the second member 22a and flows through the interior of the second member 22a. Finally, it reaches the second side of the second member 22a where the second connection hole 32a is located. Furthermore, for example, with respect to the second conductor 12a used as a P-side busbar, the current flowing from the second side of the fourth member 24a, where the third connection hole 33a is provided, flows through the fourth member 24a in the first direction, from the third protruding region 53a to the third connection region 63a of the sixth member 26a. Then, from the third connection region 63a, it flows through the interior of the sixth member 26a via the second inclined region 72a to the fourth connection region 64a. Then, from the fourth connection region 64a, it goes to the fourth protruding region 54a of the fifth member 25a and flows through the interior of the fifth member 25a. Finally, it reaches the first side of the fifth member 25a where the fourth connection hole 34a is located.

[0038] According to the core unit 10a, the first member 21a and the second member 22a each have portions that penetrate the through hole 16a provided in the core 13a. Therefore, these first, second, and third members achieve a structure in which the first conductor wraps around the core, while the first and second members do not need to be flexible and can be flat. Thus, while high impedance is ensured by the structure in which the first conductor wraps around the core, large currents can be handled by the use of flat members. In summary, the core unit 10a can handle large currents while ensuring high impedance. Furthermore, since the first conductor 11a and then the second conductor 12a can be assembled from either side of the through hole 16a in such a core unit 10a, good workability can be ensured.

[0039] In this embodiment, when viewed from a third direction which is the thickness direction of the first member 21a, the first connection region 61a overlaps with the first protruding region 51a, and the second connection region 62a overlaps with the second protruding region 52a. Therefore, the plate-shaped portions of the first member 21a and the second member 22a can be brought into contact with the third member 23a, making it easy to efficiently pass large currents. The same applies to the second conductor 12a.

[0040] In this embodiment, the third member 23a is connected to both the first member 21a and the second member 22a by fastening with bolts 81a and 82a. Therefore, a strong connection can be achieved between the first member 21a and the second member 22a and the third member 23a. The same applies to the second conductor 12a. As a result, a large current can be carried while ensuring a more stable and high impedance.

[0041] In this embodiment, the core unit 10a includes a core case 14a that houses the core 13a and is insulating. The third member 23a passes around the outer circumference of the core case 14a. Therefore, the core 13a can be protected by the core case 14a while reducing the risk of contact between the core 13a and the first conductor 11a and the second conductor 12a, respectively, thereby preventing damage to the core 13a. Consequently, the core unit 10a can be used stably for a longer period of time.

[0042] In this embodiment, the core case 14a is annular and includes an inner wall portion 35a that defines a space for housing the core 13a. The inner wall surface 37a of the inner wall portion 35a is provided with a groove 17a extending in a first direction. The first member 21a and the second member 22a have portions that fit into the groove 17a. Therefore, the first member 21a and the second member 22a can be fitted into the groove 17a provided on the inner wall surface 37a of the inner wall portion 35a of the core case 14a, improving ease of assembly and allowing the members fitted into the groove 17a to be stably held in the core case 14a. The same applies to the second conductor 12a, and the fourth member 24a and the fifth member 25a have portions that fit into the groove 18a.

[0043] In this embodiment, the core unit 10a includes a second conductor 12a that is conductive and has a portion that penetrates the through-hole 16a. The second conductor 12a includes a plate-shaped fourth member 24a having a third protruding region 53a that penetrates the through-hole 16a in a first direction and protrudes to the first side, a plate-shaped fifth member 25a that is arranged side by side with a gap between it and the fourth member 24a in a second direction, has a fourth protruding region 54a that penetrates the through-hole 16a in the first direction and protrudes to the first side, and a plate-shaped sixth member 26a that passes on the outer circumference of the core 13a and has a third connection region 63a electrically connected to the third protruding region 53a and a fourth connection region 64a electrically connected to the fourth protruding region 54a, and electrically connects the fourth member 24a and the fifth member 25a. Thus, a high impedance can be ensured while large currents in opposite directions flow through the first conductor 11a and the second conductor 12a. In this case, the first member 21a and the fourth member 24a, and the second member 22a and the fifth member 25a can be arranged to form parallel plates, so that when current flows in opposite directions between their conductors, the magnetic fluxes cancel each other out.

[0044] In this embodiment, a spacer 15a is included that penetrates the through-hole 16a and is positioned between the first conductor 11a and the second conductor 12a, and has insulating properties. Therefore, the risk of the first conductor 11a and the second conductor 12a coming into contact can be greatly reduced. In addition, positioning using the spacer 15a becomes easier, and the orientation of the first conductor 11a and the second conductor 12a can be stabilized, ensuring more stable use of the core unit 10a.

[0045] In this embodiment, the first conductor 11a and the second conductor 12a are each fixed to the spacer 15a. Therefore, the components fixed to the spacer 15a can be assembled as a single unit, improving ease of assembly. In addition, the risk of the components fixed to the spacer 15a falling off the core unit 10a can be greatly reduced.

[0046] In this embodiment, the orientation in which the first protruding region 51a and the fourth protruding region 54a are positioned in the second direction is opposite to the orientation in which the second protruding region 52a and the third protruding region 53a are positioned. Therefore, for example, bolts 81a, 82a, 83a, and 84a can be tightened from the third direction, respectively, and interference of tools during the installation of each component can be avoided. Thus, productivity can be improved.

[0047] (Embodiment 2) Another embodiment, Embodiment 2, will now be described. Figure 6 is a schematic side view showing the core unit in Embodiment 2. Figure 7 is a schematic front view of the core unit shown in Figure 6. The core unit 10b in Embodiment 2 has basically the same configuration as in Embodiment 1 and produces the same effects. However, the number of times the core unit in the first direction is folded differs from that in Embodiment 1.

[0048] Referring to Figures 6 and 7, the core unit 10b in Embodiment 2 includes a first conductor 11a, a second conductor 12a, a core 13a, a core case 14a, and a spacer 15a. The first conductor 11a includes a first member 21a, a second member 22a, and a third member 23b. The third member 23b is composed of a plurality of divided members that are spaced apart in a second direction. In this embodiment, the third member 23b is composed of a first divided member 91b, a second divided member 92b, and a third divided member 93b. That is, the third member 23b is divided into three divided members. The first divided member 91b, the second divided member 92b, and the third divided member 93b are each the same as the configuration of the third member 23a in Embodiment 1 described above.

[0049] The core unit 10b includes a plate-shaped intermediate member 27b that penetrates the through hole 16a in a first direction and has protruding regions that project to the first side and the second side. In this embodiment, the intermediate member 27b is composed of a first intermediate member 94b and a second intermediate member 95b. That is, there are two intermediate members 27b. The core unit 10b includes a plurality of bolts 81b, 82b, 83b, 84b, 85b, and 86b. The first member 21a and the first divided member 91b are electrically connected by fastening bolt 81b on the second side. The first divided member 91b and the first intermediate member 94b are electrically connected by fastening bolt 82b on the first side. The first intermediate member 94b and the second divided member 92b are electrically connected by fastening bolt 83b on the second side. The second divided member 92b and the second intermediate member 95b are electrically connected by fastening bolt 84b on the first side. The second intermediate member 95b and the third divided member 93b are electrically connected by fastening bolt 85b on the second side. The third divided member 93b and the second member 22a are electrically connected by fastening bolt 86b on the first side. The first member 21a and the second member 22a are electrically connected via the third member 23b, which is composed of the first divided member 91b, the second divided member 92b, and the third divided member 93b, and via the intermediate member 27b, which is composed of the first intermediate member 94b and the second intermediate member 95b.

[0050] In this way, the first member 21a, the second member 22a, the third member 23b, and the intermediate member 27b make it possible to achieve a structure in which the first conductor 11a is wrapped around the core 13a multiple times. Therefore, an even higher impedance can be ensured.

[0051] (Embodiment 3) Another embodiment, Embodiment 3, will now be described. Figure 8 is a schematic perspective view showing the core unit in Embodiment 3. The core unit 10c in Embodiment 3 has basically the same configuration as in Embodiment 1 and produces the same effects. However, the core unit in Embodiment 3 differs from that of Embodiment 1 in that it does not include a second conductor.

[0052] Referring to Figure 8, the core unit 10c in Embodiment 3, compared to the core unit 10a in Embodiment 1, includes a first conductor 11a, a core 13a, a core case 14a, and a spacer 15a. As described above, unlike Embodiment 1, the core unit 10c does not include a second conductor 12a. Furthermore, the core unit 10c does not include components or parts such as bolts 83a and nuts 87a, which are assumed to include a second conductor 12a. Even with this configuration, it is possible to carry a large current while ensuring high impedance.

[0053] (Other embodiments) In the above embodiment, at least one of the first member and the second member may have a portion that fits into a groove. By doing so, the groove can be used to improve ease of assembly, and the member that fits into the groove can be stably held in the core case.

[0054] Furthermore, in the above embodiment, the third member may be connected to at least one of the first member and the second member by fastening with bolts. By doing so, a strong connection can be achieved between at least one of the first member and the second member and the third member. Therefore, a large current can be carried while ensuring a more stable and high impedance.

[0055] In the above embodiment, at least one of the first conductor and the second conductor may be fixed to the spacer. By doing so, the components fixed to the spacer can be assembled as a single unit, improving ease of assembly. In addition, the risk of the components fixed to the spacer falling off the core unit can be greatly reduced.

[0056] The embodiments disclosed herein should be understood to be illustrative in all respects and not restrictive in any way. The scope of the present invention is defined not by the foregoing description but by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0057] 10a, 10b, 10c Core Unit 11a First conductor 12a Second conductor 13a core 14a Core Case 15a Spacer 16a,19a through hole 17a,18a groove 21a First Member 22a Second member 23a Third member 24a Fourth member 25a Fifth member 26a Sixth member 31a First connection hole 32a Second connection hole 33a Third connection hole 34a Fourth connection hole 35a Inner wall 36a Exterior wall 37a Inner wall surface 41a 1st fastening hole 42a 2nd fastening hole 51a 1st protrusion area 52a 2nd protruding area 53a Third protruding area 54a 4th protruding area 61a First connection area 62a Second connection area 63a Third connection area 64a Fourth connection area 71a 1st slope area 72a 2nd slope area 81a, 81b, 82a, 82b, 83a, 83b, 84a, 84b, 85b Bolts 85a, 86a, 86b, 87a, 88a nuts 91b First divided member 92b Second divided member 93b Third divided member 94b First intermediate member 95b Second intermediate member.

Claims

1. A core having through holes, A first conductor having conductivity and a portion that penetrates the through hole, A spacer having insulating properties is provided, The first conductor is A plate-shaped first member having a first protruding region that penetrates the through hole in a first direction which is the through-direction of the through-hole and protrudes to the first side in the through-direction, A plate-shaped second member is arranged in a second direction, which is the width direction of the first member, with a gap between it and the first member, and has a second protruding region that penetrates the through hole in the first direction and protrudes to the second side in the through direction, which is the opposite side from the first side. A plate-shaped third member is included, which passes through the outer circumference of the core and has a first connection region electrically connected to the first protruding region and a second connection region electrically connected to the second protruding region, thereby electrically connecting the first member and the second member. Viewed from a third direction, which is the thickness direction of the first member, The first connection region overlaps with the first protruding region, The second connection region overlaps with the second protruding region. The first member and the third member are connected using a hole that penetrates the first member in the thickness direction and a hole that penetrates the third member in the thickness direction. The second member and the third member are connected using a hole that penetrates the second member in the thickness direction and a hole that penetrates the third member in the thickness direction. The aforementioned spacer has a nut embedded in it. The spacer is a core unit that passes through the through hole and is connected to the first member.

2. The core unit according to claim 1, wherein the third member is connected to at least one of the first member and the second member by fastening with bolts.

3. The third member is composed of a plurality of divided members that are spaced apart in the second direction, The core unit further includes a plate-shaped intermediate member having a protruding region that penetrates the through hole in the first direction and protrudes to the first side and the second side, The core unit according to claim 1 or claim 2, wherein the third member electrically connects the first member and the second member via the plurality of divided members and the intermediate member.

4. The core further comprises an insulating core case that houses the aforementioned core, The core unit according to claim 1 or claim 2, wherein the third member passes through the outer circumference of the core case.

5. The core case is annular and includes an inner wall portion that defines a space for housing the core, The inner wall surface of the inner wall portion is provided with a groove extending in the first direction, The core unit according to claim 4, wherein at least one of the first member and the second member has a portion that fits into the groove.

6. The present invention further comprises a second conductor that is conductive and has a portion that penetrates the through-hole, The aforementioned second conductor is A plate-shaped fourth member having a third protruding region that penetrates the through hole in the first direction and protrudes toward the first side, A plate-shaped fifth member is arranged in the second direction at a distance from the fourth member, penetrates the through hole in the first direction, and has a fourth protruding region that protrudes toward the first side, A plate-shaped sixth member is included, which passes through the outer circumference of the core and has a third connection region electrically connected to the third protruding region and a fourth connection region electrically connected to the fourth protruding region, and electrically connects the fourth member and the fifth member. The core unit according to claim 1 or claim 2, wherein at least one of the first conductor and the second conductor is fixed to the spacer.

7. The core unit according to claim 6, wherein the spacer is disposed between the first conductor and the second conductor.

8. The core unit according to claim 6, wherein the orientation in which the first protruding region and the fourth protruding region are arranged in the second direction is opposite to the orientation in which the second protruding region and the third protruding region are arranged.

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