Electric equipment

Abstract

To shorten the physical distance of electric connection.SOLUTION: Electric equipment comprises: a coil 30 having one end 31 and the other end 32; a plate-shaped component 61 to which the one end 31 is physically and electrically connected; and a plate-shaped component 62 to which the other end 32 is physically and electrically connected, the plate-shaped component 62 is disposed behind the plate-shaped component 61 as viewed from the coil 30, and the plate-shaped component 61 has a through-hole 61C through which the other end 32 passes. The plate-shaped components 61 and 62 are plate-shaped and disposed parallel to each other, the one end 31 has a protrusion 31A and a connection surface 31B connected to the protrusion 31A. The plate-shaped component 61 has a positioning hole 61A into which the protrusion 31A is inserted to thereby position the coil 30, and is physically and electrically connected to the one end 31 by coming in contact with the connection surface 31B.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an electric device such as a power conversion device. [Background technology]

[0002] As disclosed in Patent Document 1 (particularly FIG. 1), a power conversion device is known in which a rectifier that rectifies AC power transformed by a transformer is arranged after the secondary coil of the transformer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7213938 Summary of the Invention [Problem to be solved by the invention]

[0004] In the power converter, the physical distance between the secondary coil and the diode constituting the rectifier is preferably short to reduce inductance, which is not limited to power converters but is applicable to electrical equipment in general.

[0005] An object of the present invention is to shorten the physical distance of electrical connections. [Means for solving the problem]

[0006] In order to solve the above problem, the electrical device of the present invention comprises a first electrical component having a first connection end and a second connection end, a first connection electrical component to which the first connection end is physically and electrically connected, and a second connection electrical component to which the second connection end is physically and electrically connected, wherein the second connection electrical component is arranged behind the first connection electrical component as viewed from the first electrical component, and the first connection electrical component has a through hole through which the second connection end passes. [Effects of the Invention]

[0007] According to the present invention, the second connection end of the first electrical component is connected to the second connection electrical component through the through hole of the first connection electrical component, so that the second connection end can reach the second connection electrical component without detouring around the first connection electrical component, thereby shortening the physical distance of the electrical connection between the first electrical component and the second connection electrical component. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of an electrical device according to an embodiment of the present invention. [Figure 2] FIG. 2 is an elevation view of the electrical device according to the embodiment of the present invention as viewed from the right. [Figure 3] FIG. 3 is a perspective view of a primary coil wound around a core. [Figure 4] FIG. 4 is a perspective view of the secondary coil wound around the core. [Figure 5] FIG. 5 is an elevation view of the two types of secondary coils as seen from the right. [Figure 6] FIG. 6 is an exploded perspective view of the secondary side of the electric device according to the embodiment of the present invention. [Figure 7] FIG. 7 is an exploded perspective view of the secondary side of the electric device according to the embodiment of the present invention. [Figure 8] FIG. 8 is an exploded perspective view of the secondary side of the electric device according to the embodiment of the present invention. [Figure 9] FIG. 9 is an exploded perspective view of the secondary side of the electric device according to the embodiment of the present invention. [Figure 10] FIG. 10 is an equivalent circuit diagram of an electric device according to an embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view schematically showing the configuration of an electric device according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, when a plurality of elements having the same function are shown, only some of the elements may be denoted by reference numerals.

[0010] As shown in FIGS. 1 and 2, an electric device 10 according to this embodiment includes a primary coil 20, multiple secondary coils 30, multiple secondary coils 40, and an annular core 50 that passes through the central space of the coils 20 to 40. Each of the elements 20 to 50 constitutes a transformer. The electric device 10 further includes a connection unit 60, multiple diodes 71 and 72, and electrode components 80 and 90. As shown in the circuit diagram of FIG. 10, the connection unit 60 connects one end 31 and one end 41 of the coils 30 and one end 42 of the coils 30 and one end 41 of the coils 40 (see FIG. 5, etc.; details will be described later) to the electrode component 80, and also connects the other end 32 and one end 42 of the coils 30 and one end 42 of the coils 40 (see FIG. 5, etc.; details will be described later) to the electrode component 90 via the diodes 71 and 72. To achieve this connection, the connection unit 60 includes plate-like components 61 to 65. The coils 20-40, the plate-like components 61-65 (described later) that constitute the connection sections, and the electrode components 80 and 90 are made of metal conductors, but insulating films are appropriately disposed in areas where electrical connection is not intended. Examples of such insulating films include insulating varnish and insulating paper. The electrical device 10 is configured as a power conversion device that transforms (here, steps down) AC power using the coils 20-40 and full-wave rectifies the transformed AC power using diodes 71 and 72.

[0011] In the following description, the former side of the coils 20 to 40 and the electrode components 80 and 90 will be referred to as the "rear" and the latter side will be referred to as the "front." Directions perpendicular to the front-to-rear direction and directions perpendicular to each other will be referred to as the up-down direction and the left-to-right direction. The front-to-rear direction, up-down direction, and left-to-right direction are set for the convenience of explaining the structure of the electric device 10, and these directions are not intended to indicate the installation direction of the electric device 10.

[0012] As shown in Figures 1 to 3, coil 20 includes a terminal coil 21 with one turn, a plurality (here, five) of intermediate coils 22 each with multiple turns, a terminal coil 23 with one turn, a terminal coil 24 with one turn, a plurality (here, five) of intermediate coils 25 each with multiple turns, a terminal coil 26 with one turn, and a connecting conductor 27 that electrically connects the coils.

[0013] Each of the coils 21 to 26 is made of a flat wire having a rectangular cross section. Each of the coils 21 to 26 is wound so that the short side of the cross section extends in a direction parallel to the central axis direction (left-right direction) of the portion of the core 50 through which the coil passes. Therefore, the central axes (centers of winding) of the coils 21 to 26 are aligned with the central axis of the core 50.

[0014] Coils 21 to 23 are arranged side by side in the left-right direction. Middle coil 22 is sandwiched between coil 21 located on the left and coil 23 located on the right. The upper part of core 50 extending in the left-right direction penetrates through coils 21 to 23. Coils 30 or 40 are arranged between adjacent coils 21 and 22, between two adjacent coils 22 of the multiple coils 22, and between adjacent coils 22 and 23, respectively.

[0015] As shown in FIG. 3 , one end 21A of coil 21 and one end 22A of coil 22 adjacent to coil 21 extend in directions perpendicular to each other, and one end 21A and one end 22A are connected to different inner surfaces of the L-shaped cross section of connecting conductor 27 by welding or the like. As a result, coil 21 and coil 22 are electrically connected via connecting conductor 27. Similarly, the other end 22B of coil 22 is electrically connected to one end 22A of another coil 22 adjacent to coil 22 via connecting conductor 27. Furthermore, the other end 22B of coil 22 on the right side is electrically connected to one end 23A of coil 23 adjacent to coil 22 via connecting conductor 27. With this connection, coils 21 to 23 are connected in series by multiple connecting conductors 27.

[0016] Coils 24-26 are arranged below coils 21-23 and are aligned in the left-right direction in the same manner as coils 21-23. Middle coil 25 is sandwiched between right-side coil 24 and left-side coil 26. The lower left-right extending portion of core 50 penetrates coils 24-26. As with coils 21-23, coil 30 or 40 is arranged between adjacent coils 24-26. One end 24A of coil 24 is electrically connected to one end 25A of the coil 25 adjacent to coil 24 via a connecting conductor 27. The other end 22B of coil 25 is electrically connected to one end 25A of the other coil 25 adjacent to coil 25 via the connecting conductor 27. The other end 25B of the leftmost coil 25 is electrically connected to one end 26A of the coil 26 adjacent to coil 25 via the connecting conductor 27. With this connection, coils 24-26 are connected in series by multiple connecting conductors 27.

[0017] The set of coils 21-23 and the set of coils 24-26, which are connected in series, are connected in series to a current supply source. For example, the other end 23B of coil 23 and the other end 24B of coil 24 are connected by a wire (not shown), and the other end 21B of coil 21 and the other end 26B of coil 26 are connected to an external current supply source. The set of coils 21-23 and the set of coils 24-26 may be connected in parallel to the current supply source. The coils may also be connected in any manner.

[0018] As shown in Figures 1, 2, and 4 to 8, each of the multiple coils 30 and 40 is plate-shaped extending in the up-down and front-rear directions, and is formed in a C-shape, i.e., one turn, when viewed from the left-right direction. Each of the coils 30 and 40 is disposed between adjacent coils among the multiple coils 21 to 26 that make up the primary coil 20. With this configuration, the coils 20 to 40 are wound in a bifilar manner.

[0019] The multiple (six) coils 30 are divided into multiple (three) units U1 (see FIG. 6) arranged at intervals in the left-right direction. Each unit U1 consists of two coils 30 arranged side by side in the up-down direction. Similarly, the multiple (six) coils 40 are divided into multiple (three) units U2 (see FIG. 7) arranged at intervals in the left-right direction. Each unit U2 consists of two coils 40 arranged side by side in the up-down direction. The multiple units U1 and multiple units U2 are arranged alternately in the left-right direction.

[0020] As shown in FIGS. 4 and 5, one end 31 and the other end 32 of the coil 30 (portions forward of the dashed dotted line in FIG. 5) respectively include protrusions 31A and 32A that protrude forward. The forward-facing end face (side face) of the one end 31 is connected to the protrusion 31A and includes a flat connection surface 31B that is physically and electrically connected to the plate-shaped part 61 as described below. The forward-facing end face (side face) of the other end 32 is connected to the protrusion 32A and includes a flat connection surface 32B that is physically and electrically connected to the plate-shaped part 62 as described below. The other end 32 of the coil 30 extends further forward than the one end 31. In other words, the protrusion 32A and the connection surface 32B are located further forward than the protrusion 31A and the connection surface 31B, respectively. The protrusions 31A and 32A are formed to have the same shape, but may be formed to have different shapes. The distance between connection surface 31B and connection surface 32B in the front-rear direction is defined as D1 (FIG. 5).

[0021] 6, the two coils 30 constituting each unit U1 are arranged in such a way that the vertical positional relationship between one end 31 and the other end 32 is opposite. Here, one end 31 of one coil 30 is arranged closer to the other coil 30 than the other end 32.

[0022] As shown in FIGS. 4 and 5 , the coil 40 has a similar configuration to the coil 30. That is, the coil 40 has one end 41 and the other end 42, each including a protrusion 41A and 42A that protrude forward. The one end 41 and the other end 42 have, on their end surfaces, connection surfaces 41B and 42B that connect to the protrusions 41A and 42A, respectively. As with the coil 30, the protrusion 42A and the connection surface 42B are located forward of the protrusion 41A and the connection surface 41B, respectively. The protrusions 41A and 42A are formed with the same shape, but may be formed with different shapes. If the distance between the connection surface 41B and the connection surface 42B in the front-to-rear direction is defined as D2, the distance D2 is set to be longer than the distance D1 of the coil 30.

[0023] 6, the two coils 40 constituting each unit U2 are arranged so that the vertical positional relationship between one end 41 and the other end 42 is opposite. Here, the other end 42 of one coil 40 is arranged closer to the other coil 40 than the one end 41.

[0024] As shown in FIGS. 1 and 2, the connection portion 60 includes plate-shaped components 61 to 63. As shown in FIGS. 6 and 7, one end 31 of the coil 30 and one end 41 of the coil 40 are physically and electrically connected to the plate-shaped component 61. The other end 32 of the coil 30 is physically and electrically connected to the plate-shaped component 62. The other end 42 of the coil 40 is physically and electrically connected to the plate-shaped component 63. The plate-shaped components 61 to 63 extend in a direction perpendicular to the coils 30 and 40. More specifically, the plate-shaped components 61 to 63 are arranged parallel to the central axes of the coils 30 and 40 (the central axis of the core 50), that is, extending in the up-down and left-right directions. The plate-shaped components 61 to 63 are arranged parallel to each other with a gap in the front-rear direction to ensure insulation. An insulating film may be arranged between the plate-shaped components 61 and 62 and between the plate-shaped components 62 and 63.

[0025] 6 and 7, the plate-shaped part 61 has a plurality of positioning holes 61A and a plurality of positioning holes 61B. The protrusion 31A of one end 31 of the coil 30 and the protrusion 41A of one end 41 of the coil 40 are fitted into the positioning holes 61A and 61B, respectively, to position the coils 30 and 40. At this time, the connection surface 31B of the one end 31 and the connection surface 41B of the one end 41 abut against and come into contact with the rear surface, which is the main surface of the plate-shaped part 61, thereby achieving physical and electrical connection between the coils 30 and 40 and the plate-shaped part 61.

[0026] In addition to or instead of the above-described connection configuration, electrical connection between the plate-shaped component 61 and the coils 30 and 40 may be ensured by contact between the protrusion 31A and the inner wall of the positioning hole 61A and between the protrusion 41A and the inner wall of the positioning hole 61B. In this case, the connection surfaces 31B and 41B may be non-contact surfaces that do not come into contact with the plate-shaped component 61. The connection surfaces 31B and 41B may be bonded to the plate-shaped component 61 using a conductive brazing material or the like. This type of bonding also achieves physical and electrical connection between the coils 30 and 40 and the plate-shaped component 61. When this bonding is employed, the positioning holes 61A and 61B and the protrusions 31A and 41A may be omitted. Here, the positioning holes 61A and 61B are through holes, but they may also be blind holes. These variations are also applicable to other protrusions, positioning holes, and connection surfaces, which will be described later.

[0027] The plate-shaped part 61 also has a plurality of through holes 61C through which the other ends 32 of the coils 30 pass and a plurality of through holes 61D through which the other ends 42 of the coils 40 pass. The through holes 61C and 61D are formed as slits extending in the vertical direction, which is the direction in which the coils 30 and 40 extend. The through hole 61D is configured to be large enough to accommodate the other ends 42 of the two coils 40 arranged vertically that make up the unit U2. The through holes 61C and 61D are formed so that their inner walls do not come into contact with the other ends 32 and 42, respectively, i.e., so that the other ends 32 and 42 of the coils 30 and 40 are not electrically connected to the plate-shaped part 61. An insulating film may be provided between the other ends 32 and 42 and the inner walls of the through holes 61C and 61D (the same applies to the relationship between the other ends and the through holes).

[0028] The portion of the other end 32 of the coil 30 that passes through the through hole 61C is located forward of the connection surface 31B of the one end 31. This is because, as described above, the connection surface 31B of the one end 31 of the coil 30 abuts on the plate-shaped part 61. The distance D1 is greater than the thickness of the plate-shaped part 61, and therefore, as shown in FIG. 8, the connection surface 32B of the other end 32 inserted into the through hole 61C is located forward of the plate-shaped part 61.

[0029] Similarly, the portion of the other end 42 of the coil 40 that passes through the through hole 61D is located forward of the connection surface 41B of the one end 41. The distance D2 is greater than the thickness of the plate-shaped part 61, and therefore, as shown in Fig. 8, the connection surface 42B of the other end 42 is located forward of the front surface of the plate-shaped part 61. Note that, as shown in Fig. 5, since the distance D1 is less than the distance D2, the connection surface 42B is located forward of the connection surface 32B, and the other end 42 protrudes forward more than the other end 32.

[0030] As shown in Fig. 6, the plate-shaped part 62 has a positioning hole 62A into which the protrusion 32A of the other end 32 of the coil 30, which passes through the through-hole 61C of the plate-shaped part 61, fits. The coil 30 is positioned by fitting the protrusion 32A into the positioning hole 62A, and the connection surface 32B of the other end 32 abuts against and comes into contact with the rear surface, which is the main surface, of the plate-shaped part 62. This contact establishes a physical and electrical connection between the coil 30 and the plate-shaped part 62. In addition, because the connection surface 32B is located forward of the plate-shaped part 61, a gap (see also Fig. 2) is provided between the plate-shaped part 61 and the plate-shaped part 62.

[0031] 7, the plate-shaped part 62 also has a plurality of through holes 62B that coincide with the through holes 61D of the plate-shaped part 61 when viewed from the front-rear direction and through which the other ends 32 of the coils 30 pass. The through holes 62B are slits similar to the through holes 61D. The through holes 62B are formed so that their inner walls do not come into contact with the other ends 42, that is, so that the other ends 42 of the coils 40 and the plate-shaped part 62 are not electrically connected. The other ends 42 of the coils 40 are configured in a shape such that the connection surface 42B is located forward of the plate-shaped part 62 (in particular, the distance D2 is adjusted).

[0032] The plate-shaped part 63 has a positioning hole 63A that fits over the protrusion 42A of the other end 42 of the coil 40, which passes through the through-holes 61C and 62B. The coil 40 is positioned by the engagement of this protrusion 42A, and the connection surface 42B of the other end 42 abuts against and contacts the rear surface, which is the main surface, of the plate-shaped part 63. This contact establishes a physical and electrical connection between the coil 40 and the plate-shaped part 63. Furthermore, because the connection surface 42B is located forward of the plate-shaped part 62, a gap (see also FIG. 2) is provided between the plate-shaped part 62 and the plate-shaped part 63.

[0033] As shown in FIGS. 1, 2, and 8, the connection portion 60 also includes plate-shaped components 64 and 65. The plate-shaped components 64 and 65 are arranged so as to be perpendicular to the plate-shaped components 61 to 63. Specifically, the plate-shaped components 64 and 65 extend in the front-rear and left-right directions. The plate-shaped components 64 and 65 are arranged parallel to each other with a gap between them in the vertical direction, with the plate-shaped component 65 located below the plate-shaped component 64. The plate-shaped component 64 is physically and electrically connected to the plate-shaped component 63, and the plate-shaped component 65 is physically and electrically connected to the plate-shaped component 62.

[0034] 8, plate-shaped parts 64 and 65 have protrusions 64A and 65A, respectively, at their rear ends. Furthermore, the rear-facing end face (side face) of plate-shaped part 64 includes a flat connecting surface 64B that connects to protrusion 64A. Similarly, the rear-facing end face (side face) of plate-shaped part 65 includes a flat connecting surface 65B that connects to protrusion 65A.

[0035] The protrusion 64A of the plate-shaped part 64 fits into the positioning hole 63B of the plate-shaped part 63, thereby positioning the plate-shaped part 64. At this time, the connection surface 64B of the plate-shaped part 64 abuts against and comes into contact with the front surface, which is the main surface, of the plate-shaped part 63. This contact establishes a physical and electrical connection between the plate-shaped part 64 and the plate-shaped part 63.

[0036] The protrusion 65A of the plate-shaped part 65 fits into a positioning hole 62C provided in the plate-shaped part 62, thereby positioning the plate-shaped part 65. Here, the plate-shaped part 63, which is in front of the plate-shaped part 62, is formed in a shape that does not cover the positioning hole 62C from the front (more specifically, a shape that is smaller than the plate-shaped part 62). Therefore, the plate-shaped part 65 can reach the plate-shaped part 62 without interfering with the plate-shaped part 63. When the protrusion 65A is fitted, the connection surface 65B of the plate-shaped part 65 comes into contact with the front surface, which is the main surface, of the plate-shaped part 62. This contact realizes a physical and electrical connection between the plate-shaped part 65 and the plate-shaped part 62. The reason why the plate-shaped part 63 in front of the plate-shaped part 62 does not cover the positioning hole 62C from the front is that the other end 42 of each coil 40 connected to the plate-shaped part 63 is positioned more inward in the direction in which the plate-shaped part 62 extends (here, the up-and-down direction) than the other end 32 of each coil 30 connected to the plate-shaped part 62.

[0037] The electrode part 80 is plate-shaped and is physically and electrically connected to the plate-shaped part 61. The electrode part 80 extends in a direction perpendicular to the plate-shaped part 61 and the like, and here, in particular, is arranged parallel to the plate-shaped part 64 and the like. The rear end of the electrode part 80 is made up of a plurality of protrusions 81 to 84. The protrusions 81 and 84 each have a protrusion 81A or 84A that protrudes rearward, and each have a flat connection surface 81B or 84B that connects to the protrusion 81 or 84, on each rear-facing end surface. The protrusions 82 and 83 each have a flat connection surface 82B or 83B as each rear-facing end surface.

[0038] The protrusions 81 to 84 pass through four through holes 62D, which are slits extending in the left-right direction of the plate-shaped component 62. The protrusions 81 to 84 are inserted into the four through holes 62D at intervals from the inner walls of the four through holes 62D so as not to be electrically connected to the plate-shaped component 62. Note that an insulating film may be provided between the protrusions 81 to 84 and each inner wall.

[0039] The protrusions 81A and 84A of the protrusions 81 and 84, which pass through the four through-holes 62D of the plate-shaped part 62, respectively, are fitted into the positioning holes 61E of the plate-shaped part 61, thereby positioning the electrode part 80. In addition, the connection surfaces 81B to 84B come into contact with the front surface, which is the main surface of the plate-shaped part 61, thereby achieving physical and electrical connection between the plate-shaped part 61 and the electrode part 80.

[0040] 9, electrode part 90, which is paired with electrode part 80, is sandwiched and held from above and below by plate-shaped parts 64 and 65 via diodes 71 and 72 (see also FIGS. 1, 2, and 6). Electrode part 90 is plate-shaped, and as shown in FIGS. 2 and 6, is disposed at a distance from plate-shaped part 63 and is insulated from plate-shaped part 63.

[0041] Referring again to FIG. 9 , four diodes 71 are arranged above the electrode part 90, and four diodes 72 are arranged below the electrode part 90. The diodes 71 and 72 are fastened to each other with a bolt B2 and a nut N1, sandwiching the electrode part 90 therebetween. The plate-shaped part 64 is fastened to the upper surface of the diode 71 with a bolt B1. The plate-shaped part 65 is fastened to the lower surface of the diode 72 with a bolt B3. The electrode part 90 and the plate-shaped parts 64 and 65 each have a through-hole through which one of the bolts B1 to B3 is inserted. Washers, rubber rings, etc. may be used for fastening the parts with the bolts B1 to B3. The diode 71 is fastened so that its anode is electrically and physically connected to the plate-shaped part 64, and its cathode is electrically and physically connected to the electrode part 90. The diode 72 is fastened and fixed so that its anode is electrically and physically connected to the plate-shaped component 65, and its cathode is electrically and physically connected to the electrode component 90. For fastening and fixing with the bolts B1 to B3, the plate-shaped components 64 and 65, the electrode component 90, and the diodes 71 and 72 are provided with through holes through which any of the bolts B1 to B3 passes. The positions of these through holes are arbitrary.

[0042] The electrode part 80 is provided with a plurality of through holes 89 through which the plurality of bolts B3 pass, respectively. The through holes 89 are formed to a size such that the inner walls thereof do not come into contact with the bolts B3. This prevents interference between the electrode part 80 and the bolts B3.

[0043] The electrode parts 80 and 90 are externally connected via through holes 80A and 90A. The electric device 10 is configured as, for example, a power conversion device for welding, and the electrode parts 80 and 90 are connected to electrodes for resistance welding or the like.

[0044] FIG. 10 shows an equivalent circuit of the configuration described above. As shown in FIG. 10, one end 31 of each of the multiple secondary-side coils 30 and one end 41 of each of the multiple secondary-side coils 40 are connected to an electrode component 80 via a plate-shaped component 61. The other end 32 of each of the multiple secondary-side coils 30 is connected to the anodes of multiple secondary-side diodes 71 via plate-shaped components 62 and 65. The other end 42 of each of the multiple secondary-side coils 40 is connected to the anodes of multiple secondary-side diodes 72 via plate-shaped components 63 and 64. The cathodes of each of the multiple secondary-side diodes 71 and 72 are connected to an electrode component 90. The multiple secondary-side diodes 71 are arranged in parallel, and the multiple secondary-side diodes 72 are also arranged in parallel. Power input to the primary-side coil 20 is transformed (here, stepped down) by the secondary-side coils 30 and 40. The transformed power is rectified by the parallel-connected diodes 71 and 72 and output from the electrode components 80 and 90.

[0045] As described above, in this embodiment, one end 31 of the coil 30 is physically and electrically connected to the plate-shaped part 61, while the other end 32 is physically and electrically connected to the plate-shaped part 62 located in front of the plate-shaped part 61, in other words, behind the plate-shaped part 61 as viewed from the coil 30, through the through-hole 61C of the plate-shaped part 61. This allows the other end 32 of the coil 30 to reach the plate-shaped part 62 without detouring around the plate-shaped part 61, thereby shortening the physical distance of the electrical connection between the coil 30 and the plate-shaped part 62. Note that "physically connected" in this embodiment means connecting two connection objects by bringing them into contact with each other. Contact includes direct contact and adhesion via an adhesive layer made of a brazing material or the like.

[0046] Furthermore, one end 41 of the coil 40 is connected to the plate-shaped part 61, while the other end 32 is physically and electrically connected to the front of the plate-shaped parts 61 and 62, in other words, to the plate-shaped part 63 behind the plate-shaped parts 61 and 62 as seen from the coil 40, through the through holes 61D and 62B of the plate-shaped parts 61 and 62. This allows the other end 42 of the coil 40 to reach the plate-shaped part 63 without detouring around the plate-shaped parts 61 and 62, and the physical distance of the electrical connection between the coil 40 and the plate-shaped part 63 can be shortened.

[0047] Furthermore, in this embodiment, the multiple coils 30 and 40 are connected to plate-shaped components 61-63 that are orthogonal to the coils 30 and 40. Furthermore, an electrode component 80 extending in an orthogonal direction perpendicular to the plate-shaped component 61 is connected to the plate-shaped component 61, and plate-shaped components 62 and 63 are connected to plate-shaped components 64 and 65, respectively, that extend in the orthogonal direction. An electrode component 90 extending in the orthogonal direction is connected between the plate-shaped components 64 and 65 and connected to them via diodes 71 and 72. This configuration shortens the physical distance of the electrical connection from the coils 30 and 40 to the electrode components 80 and 90. In particular, connecting the multiple coils 30 and 40 to the plate-shaped components 61-63 shortens the physical distance of the electrical connection compared to when each coil is individually connected to the diode 71 or 72 by wiring or the like. Furthermore, the end portion (protrusions 81-84) of the electrode component 80 passes through the through-hole 62D provided in the plate-shaped component 62 and is physically and electrically connected to the plate-shaped component 61, so that the electrode component 80 can reach the plate-shaped component 61 in a straight line without detouring around the plate-shaped component 62. This further shortens the physical distance. Also, the plate-shaped components 64-65 and the electrode components 80 and 90 are plate-shaped, which provides a heat dissipation effect for heat generated by current. Furthermore, heat from the diodes 71 and 72 is also effectively dissipated. Furthermore, by arranging the plate-shaped components 64-65 and the electrode components 80 and 90 in parallel with each other, the vertical size of the arrangement space for these components can be reduced.

[0048] By shortening the physical distance, the inductance of this portion can be reduced. This improves the controllability of the current output from the electrode components 80 and 90. In particular, the rise time required to obtain a large current and the recovery time from a sudden change in current are improved. Furthermore, the power conversion efficiency is also improved.

[0049] In this embodiment, various protrusions and connection surfaces are provided on the coils 30 and 40, the plate-like components 64 and 65, and the electrode component 80, and positioning holes are provided on the plate-like components 61 to 63. This allows the positioning of components such as the coil 30 by the protrusions and positioning holes, and the connection surfaces allow for a large area for electrical connection. This achieves low inductance and low impedance, improving the efficiency of electrode conversion.

[0050] The number of diodes 71 and 72 may be any number, provided that they are one or more. However, as described above, by connecting multiple diodes 71 and multiple diodes 72 in parallel, the electrical device 10 as a whole can achieve a high rated current, resulting in an electrical device 10 that can handle large currents. The diodes 71 and / or 72 may be, for example, rectifier diodes, Schottky diodes, or fast recovery diodes. However, to reduce losses and improve current controllability by reducing the recovery current, Schottky diodes or fast recovery diodes are preferably used. The multiple diodes 71 and / or 72 may be a combination of different types of diodes. For example, the one or more diodes 71 and / or the one or more diodes 72 may include one or more Schottky diodes, one or more fast recovery diodes, or both. The remaining diodes, if any, may be of any type. The multiple diodes 71 and / or 72 may include multiple Schottky diodes, multiple fast recovery diodes, or a combination of one or more Schottky diodes and one or more fast recovery diodes. By connecting these in parallel, the low rated current of the Schottky diodes or fast recovery diodes is compensated for, and a sufficient rated current is ensured for the electric device 10 as a whole. This allows the electric device 10 to handle large currents. All of the plurality of diodes 71 may be Schottky diodes or fast recovery diodes, or some of the plurality of diodes 71 may be Schottky diodes and the rest may be fast recovery diodes. Similarly, all of the plurality of diodes 72 may be Schottky diodes or fast recovery diodes, or some of the plurality of diodes 72 may be Schottky diodes and the rest may be fast recovery diodes.

[0051] (Addendum) Configurations as examples of the above-described embodiments and modified examples are appended. The appended configurations can be combined with each other. The reference numerals in parentheses in the following appendix indicate an example of the correspondence between the elements described in the appendix and the elements of the above-described embodiments and modified examples, and are not intended to limit the elements described in the appendix to the elements of the above-described embodiments and modified examples to which the reference numerals in parentheses are appended.

[0052] (Appendix 1) a first electrical component (30) having a first connecting end (31) and a second connecting end (32); a first connecting electric component (61) to which the first connecting end is physically and electrically connected; a second connection electrical component (62) to which the second connection end is physically and electrically connected, the second connection electrical component is disposed behind the first connection electrical component when viewed from the first electrical component; The first connecting electric part has a through hole (61C) through which the second connecting end passes. Electrical equipment (10).

[0053] Specific examples of the first electric component, the first connecting electric component, and the second connecting electric component are arbitrary. The first electric component may be, for example, a capacitor other than a coil. The first and second connecting electric components may be circuit boards. For example, as shown in FIG. 11 , two circuit boards 101 and 102 serving as the first and second connecting electric components may be arranged in parallel, and one end 103A of a component 103 serving as the first electric component, such as a capacitor, may be connected to the circuit board 101 by soldering or the like. Furthermore, the other end 103B of the electric component 103 may be extended through a through-hole 101A in the circuit board 101 to reach the circuit board 102 and connected to the circuit board 102.

[0054] With the configuration of Appendix 1, the second connection end of the first electrical component is connected to the second connection electrical component through the through hole of the first connection electrical component, so that the second connection end can reach the second connection electrical component without detouring the first connection electrical component, thereby shortening the physical distance of the electrical connection between the first electrical component and the second connection electrical component.

[0055] The physical connection described above includes, for example, a direct connection between two connection objects without the use of other components (particularly electrical components). This direct connection includes a connection where the two connection objects are in contact with each other, a connection via solder, and welding. The contact includes direct contact and adhesion via an adhesive layer made of a brazing material or the like. The through hole described above includes a through hole with a ring-shaped inner wall as well as, for example, a notch with a non-ring-shaped inner wall. The notch may be, for example, a notch with a U-shaped or C-shaped cross section. These also apply to the physical connections and through holes described below.

[0056] (Appendix 2) the first and second connecting electric components are plate-shaped and arranged parallel to each other; the first connecting end includes a protrusion (31A) and a connecting surface (31B) connected to the protrusion, the first connecting electric component has a first positioning hole (61A) into which the protrusion is inserted to position the first electric component, and is physically and electrically connected to the first connecting end by contacting the connecting surface; Electrical equipment as described in Appendix 1.

[0057] (Appendix 3) the first and second connecting electric components are plate-shaped and arranged parallel to each other; the second connecting end includes a protrusion (32A) and a connecting surface (32B) connected to the protrusion, the second connecting electric component has a second positioning hole (62A) into which the protrusion of the second connecting end is inserted to position the first electric component, and is physically and electrically connected to the second connecting end by contacting the connecting surface of the second connecting end; 1. An electrical device as set forth in Appendix 1 or 2.

[0058] According to the configurations of Supplementary Notes 2 and 3, the positioning hole determines the position of the first electrical component, facilitating assembly of the first electrical component. Furthermore, the connection surface increases the cross-sectional area of ​​the connection between the first electrical component and the first or second connecting electrical component, thereby achieving low inductance and low impedance. The first and second connecting electrical components do not have to be plate-shaped or parallel.

[0059] The configurations of Supplementary Notes 2 and 3 may be applied to the second electrical component, the first connecting electrical component, and the third connecting electrical component in Supplementary Note 4 described below (just read the first electrical component as the second electrical component, and the second connecting electrical component as the third connecting electrical component).

[0060] (Appendix 4) a second electrical component (40) having a first connection end (41) and a second connection end (42), the second electrical component being disposed on the same side of the first electrical component as the first electrical component, the first connection end being physically and electrically connected to the first electrical component; and a third connecting electric component (63) to which the second connecting end of the second electric component is physically and electrically connected, the third connection electrical component is disposed behind the first connection electrical component and the second connection electrical component when viewed from the second electrical component; The first connection electric component and the second connection electric component each have a through hole (61D, 62B) through which the second connection end of the second electric component passes. An electrical device according to any one of Supplementary Notes 1 to 3.

[0061] With the configuration of Appendix 4, the second connection end of the second electrical component is connected to the third connection electrical component through the through holes of the first and second connection electrical components, so that the second connection end can reach the third connection electrical component without detouring around the first and second connection electrical components, thereby shortening the physical distance of the electrical connection between the second electrical component and the third connection electrical component.

[0062] The second electric component and the third connecting electric component may be any specific example. The second electric component may be a capacitor or the like other than a coil. The third connecting electric component may be a circuit board or the like.

[0063] (Appendix 5) the first and second electrical components are a first coil (30) and a second coil (40) on the secondary side of a transformer, respectively; The first to third connecting electric components are plate-shaped conductors parallel to each other. Electrical equipment as described in Appendix 4.

[0064] Supplementary Note 5 makes it possible to shorten the physical distance of the electrical connection, particularly on the secondary side of the transformer.

[0065] (Appendix 6) a first conductor (64) that is physically and electrically connected to the third connection electric component from the side opposite to the second electric component and extends in a direction perpendicular to the first to third connection electric components; a second conductor (65) extending in the perpendicular direction and physically and electrically connected to the second connecting electrical component from the side opposite to the first electrical component; a first electrode (80) extending in the perpendicular direction and physically and electrically connected to the first connecting electrical component from the side opposite to the first electrical component; a second electrode (90) disposed between the first conductor and the second conductor and extending in the perpendicular direction; one or more first diodes (71) each having an anode connected to the first conductor and a cathode connected to the second electrode; one or more second diodes (72) each having an anode connected to the second conductor and a cathode connected to the second electrode; 6. The electrical device according to claim 5, further comprising:

[0066] According to Supplementary Note 6, the above components enable the physical distance of the electrical connection from the secondary coil to the first electrode and the second electrode to be shortened.

[0067] (Appendix 7) a third electrical component (30) comprising a secondary coil of a transformer, the third electrical component having a first connection end (31) physically and electrically connected to the first connection electrical component and a second connection end (32) physically and electrically connected to the second connection electrical component; a fourth electrical component (40) comprising a secondary coil of a transformer, the fourth electrical component having a first connection end (41) physically and electrically connected to the first connection electrical component and a second connection end (42) physically and electrically connected to the third connection electrical component; the first connecting electric component has a through hole (61C) through which the second connecting end of the third electric component passes; The first and second connection electric components have through holes (61D, 62B) through which the second connection end of the fourth electric component passes. Electrical equipment as described in Appendix 6.

[0068] According to Appendix 7, the first to fourth electrical components (plurality of coils 30 and plurality of coils 40) are connected to the first and second connecting electrical components or the first and third connecting electrical components, so that the physical distance of the electrical connection can be made shorter than when each electrical component is individually connected to the first or second diode by wiring or the like.

[0069] Specific examples of the third and fourth electrical components are arbitrary. The third and fourth electrical components may be components other than coils, such as capacitors. The third electrical component may be the same type as the first electrical component connected in parallel with the third electrical component. The fourth electrical component may be the same type as the second electrical component connected in parallel with the fourth electrical component. The through hole through which the second connecting end of the third electrical component passes may be the same as or different from the through hole in Supplementary Note 1. The through hole through which the second connecting end of the fourth electrical component passes may be the same as or different from the through hole in Supplementary Note 4.

[0070] (Appendix 8) The first conductor, the second conductor, the first electrode, and the second electrode are plate-shaped. 1. An electrical device as set forth in Appendix 6 or 7.

[0071] According to Supplementary Note 8, the plate shape provides a heat dissipation effect and also ensures the amount of current.

[0072] (Appendix 9) The second connection electrical component has a through hole through which an end of the first electrode passes. An electrical device according to any one of Supplementary Notes 6 to 8.

[0073] According to Supplementary Note 9, the first electrode can reach the first connection electric part without detouring the second connection electric part, thereby shortening the physical distance of the electrical connection between them.

[0074] (Appendix 10) At least one of the one or more first diodes and the one or more second diodes includes one or more Schottky diodes. An electrical device according to any one of Supplementary Notes 6 to 9.

[0075] (Appendix 11) At least one of the one or more first diodes and the one or more second diodes includes one or more fast recovery diodes. An electrical device according to any one of Supplementary Notes 6 to 10.

[0076] (Appendix 12) the one or more first diodes are a plurality of first diodes connected in parallel to the first conductor and the second electrode, the one or more second diodes are a plurality of second diodes connected in parallel to the second conductor and the second electrode; An electrical device according to any one of Supplementary Notes 6 to 11.

[0077] (Appendix 13) At least one of the plurality of first diodes and the plurality of second diodes includes a plurality of Schottky diodes connected in parallel, a plurality of fast recovery diodes connected in parallel, or a combination of one or more Schottky diodes and one or more fast recovery diodes connected in parallel; 1. An electrical device as described in Appendix 12.

[0078] As in Supplementary Notes 10, 11, and 13, the use of Schottky diodes or fast recovery diodes reduces losses (particularly when the AC frequency is high) and improves current controllability due to a reduction in recovery current. Furthermore, connecting diodes in parallel as in Supplementary Note 12 increases the rated current of the entire electrical device 10. Furthermore, connecting multiple Schottky diodes, multiple fast recovery diodes, or a combination thereof in parallel compensates for the low rated current, which is a general disadvantage of Schottky diodes or fast recovery diodes, and ensures a sufficient rated current for the entire electrical device.

[0079] (Scope of the present invention) Although the present invention has been described above with reference to the embodiments and modifications, the present invention is not limited to the above embodiments and modifications. For example, the present invention includes various modifications to the above embodiments and modifications that can be understood by a person skilled in the art within the scope of the technical concept of the present invention. The configurations listed in the above embodiments and modifications can be combined as appropriate within a range that does not contradict. Furthermore, the omission of each configuration is optional. [Explanation of symbols]

[0080] 10...electrical equipment, 20...coil, 21, 23, 24, 26...terminal coil, 22, 25...intermediate coil, 21A to 26A...one end, 21B to 26B...other end, 27...connecting conductor, 30, 40...coil, 31, 41...one end, 31A, 41A...convex portion, 31B, 41B...connecting surface, 32, 42...other end, 32A, 42A...convex portion, 32B, 42B...connecting surface, 50...core, 60...connecting portion, 61 to 65...plate-shaped part, 61A, 61B, 61E, 62A, 62C, 63A...positioning hole, 61C, 61D, 62B, 62D, 63B...through holes, 64A, 65A...protrusions, 64B, 65A...connection surfaces, 71, 72...diodes, 80, 90...electrode components, 80A...through holes, 81 to 84, 81A, 84A...protrusions, 81B to 84B...connection surfaces, 89...through holes, 90A...through holes, 101, 102...circuit boards, 101A...through holes, 103...electrical components, 103A...one end, 103B...other end, B1 to B3...bolts, N1...nut, U1, U2...units.

Claims

1. a first electrical component having a first connection end and a second connection end; a first connecting electrical component to which the first connecting end is physically and electrically connected; a second connection electrical component to which the second connection end is physically and electrically connected, the second connection electrical component is disposed behind the first connection electrical component when viewed from the first electrical component; The first connecting electrical component has a through hole through which the second connecting end passes. Electrical equipment.

2. the first and second connecting electric components are plate-shaped and arranged parallel to each other; the first connection end includes a protrusion and a connection surface connected to the protrusion, the first connecting electrical component has a first positioning hole into which the protrusion is inserted to position the first electrical component, and is physically and electrically connected to the first connecting end by contacting the connecting surface; The electrical device according to claim 1 .

3. the first and second connecting electric components are plate-shaped and arranged parallel to each other; the second connection end includes a protrusion and a connection surface connected to the protrusion, the second connecting electrical component has a second positioning hole into which the protrusion of the second connecting end is inserted to position the first electrical component, and is physically and electrically connected to the second connecting end by contacting the connection surface of the second connecting end; 3. The electrical device according to claim 1 or 2.

4. a second electrical component having a first connection end and a second connection end, the second electrical component being disposed on the same side of the first electrical component as the first electrical component, the first connection end being physically and electrically connected to the first electrical component; a third connecting electric component to which the second connecting end of the second electric component is physically and electrically connected, the third connection electrical component is disposed behind the first and second connection electrical components when viewed from the second electrical component; Each of the first and second connection electrical components has a through hole through which the second connection end of the second electrical component passes. The electrical device according to claim 1 .

5. the first and second electrical components are a first coil and a second coil on a secondary side of a transformer, respectively; the first to third connection electric components are plate-shaped conductors parallel to each other; 5. The electrical device according to claim 4.

6. a first conductor that is physically and electrically connected to the third connection electrical component from the side opposite to the second electrical component, the first conductor extending in a direction perpendicular to the first to third connection electrical components; a second conductor extending in the perpendicular direction and physically and electrically connected to the second connecting electrical component from a side opposite to the first electrical component; a first electrode extending in the perpendicular direction and physically and electrically connected to the first connecting electrical component from a side opposite to the first electrical component; a second electrode disposed between the first conductor and the second conductor and extending in the perpendicular direction; one or more first diodes each having an anode connected to the first conductor and a cathode connected to the second electrode; one or more second diodes each having an anode connected to the second conductor and a cathode connected to the second electrode; The electrical device of claim 5 further comprising:

7. a third electrical component comprising a secondary coil of a transformer, the third electrical component having a first connection end physically and electrically connected to the first connection electrical component and a second connection end physically and electrically connected to the second connection electrical component; a fourth electrical component comprising a secondary coil of a transformer, the fourth electrical component having a first connection end physically and electrically connected to the first connection electrical component and a second connection end physically and electrically connected to the third connection electrical component; the first connecting electric component has a through hole through which the second connecting end of the third electric component passes; the first and second connecting electrical components have through holes through which the second connecting end of the fourth electrical component passes; The electrical device according to claim 6.

8. the first conductor, the second conductor, the first electrode, and the second electrode are plate-shaped; The electrical device according to claim 6.

9. the second connection electrical component has a through hole through which an end of the first electrode passes; The electrical device according to claim 6.

10. at least one of the one or more first diodes and the one or more second diodes includes one or more Schottky diodes; The electrical device according to claim 6.

11. at least one of the one or more first diodes and the one or more second diodes includes one or more fast recovery diodes; 7. The electrical device according to claim 6.

12. the one or more first diodes are a plurality of first diodes connected in parallel to the first conductor and the second electrode, the one or more second diodes are a plurality of second diodes connected in parallel to the second conductor and the second electrode; 7. The electrical device according to claim 6.

13. At least one of the plurality of first diodes and the plurality of second diodes includes a plurality of Schottky diodes connected in parallel, a plurality of fast recovery diodes connected in parallel, or a combination of one or more Schottky diodes and one or more fast recovery diodes connected in parallel.

13. The electrical device according to claim 12.

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