Terminal block

Abstract

The invention provides a terminal block capable of improving surge resistance. A terminal block (1) according to one aspect of the present invention is provided with one or more bus bars (3), a block body (4), and a magnetic member (28). A load is connected to one end (3a) of the bus bar (3). The seat main body (4) supports the bus bar (3) and is fitted to an attachment partner (7). A magnetic member (28) is provided to the seat body (4) so as to surround the bus bar (3) from the periphery, and suppresses partial discharge caused by a surge voltage generated by load driving.

Description

Technical Field

[0001] The invention relates to a terminal block. Background Art

[0002] Conventionally, as disclosed in Patent Document 1, a terminal block mounted on a housing having a built-in rotating electric machine is known. The terminal block has a power connector for relaying electric power to the rotating electric machine. The power connector has three power terminal plates in a manner that crosses the base portion of the terminal block. In the case of vehicle-mounted use, the rotating electric machine in the housing is electrically connected to an inverter that controls the electric power of the vehicle battery through the terminal block. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2011-160619 Summary of the invention Problems to be solved by the invention

[0004] However, since the inverter performs waveform control at high speed, surge voltage is easily generated when driving the rotating electrical machine. At this time, partial discharge may occur due to the surge voltage, which may cause insulation degradation of the winding of the rotating electrical machine.

[0005] An object of the present invention is to provide a terminal block capable of improving surge resistance. Solutions to Solve Problems

[0006] The terminal block for solving the above-mentioned problem comprises: one or more bus bars connected to a load at one end of both ends; a block body supporting the bus bar and mounted on the other side; and a magnetic component arranged on the block body so as to surround the bus bar from all sides to suppress partial discharge caused by surge voltage generated by driving the load. Effects of the Invention

[0007] The present invention can improve the surge resistance in the terminal seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a perspective view of the terminal block in the first embodiment as seen from the front. Figure 2 This is a perspective view of the terminal block viewed from the back. Figure 3 yes Figure 4 The cross-sectional view along line III-III is shown. Figure 4 yes Figure 3 The cross-sectional view along line IV-IV is shown. Figure 5 This is a perspective view of a bus bar with magnetic components installed. Figure 6This is a perspective view showing a method of attaching a magnetic member to a bus bar. Figure 7 yes Figure 4 The VII-VII line cross-sectional view is shown. Figure 8 It is a cross-sectional view of the terminal block according to the second embodiment. Fig. 9 yes Figure 8 The IX-IX line cross-sectional view is shown. Fig.10 (a)~ Fig.10 (d) is an explanatory diagram of the assembly of the terminal block. Fig.11 It is a cross-sectional view of a terminal block according to a third embodiment. Fig.12 (a)~ Fig.12 (c) is an explanatory diagram of the assembly of the terminal block. Fig.13 It is a cross-sectional view of a terminal block according to a fourth embodiment. Fig.14 (a) Fig.14 (b) is an explanatory diagram of the assembly of the terminal block. Fig.15 This is a front view of a terminal block in another example. Fig.16 This is a perspective view of a bus bar to which a magnetic member is attached in still another example. Fig.17 This is a schematic diagram of a bus bar with a magnetic member mounted thereon in yet another example. Fig.18 This is an explanatory diagram of another example of defects in a conventional shape. DETAILED DESCRIPTION

[0009] First, embodiments of the present invention will be described by way of examples. [1] The terminal block of the present invention comprises: one or more bus bars connected to a load at one end of both ends; a block body supporting the bus bar and mounted on a mounting partner; and a magnetic member arranged on the block body so as to surround the bus bar from all sides to suppress partial discharge caused by a surge voltage generated by driving the load.

[0010] According to this structure, since the magnetic component is arranged around the bus bar, the magnetic component can be used to absorb the noise current caused by the surge voltage when the load is driven. Therefore, the magnetic component can be used to suppress the occurrence of partial discharge caused by the surge voltage. Therefore, the surge resistance can be improved.

[0011] [2] In the above [1], the magnetic component is formed into a shape capable of mounting the plurality of bus bars. According to this structure, since a plurality of bus bars are mounted on one magnetic component, the magnetic component can be used to offset noise currents that can be generated in each bus bar. Therefore, it further contributes to the improvement of surge resistance.

[0012] [3] In the above [2], the magnetic member has a hole for inserting the bus bar for each of the bus bars. According to this structure, it is easy to understand which hole of the magnetic member the bus bar should be mounted in.

[0013] [4] In the above [2], the magnetic component has a hole into which the plurality of bus bars can be inserted in a concentrated manner. According to this structure, since the plurality of bus bars can be concentratedly inserted into the hole of the magnetic component, it is easy to assemble the bus bars into the hole. In addition, the magnetic component can also be provided as an integral component structure rather than a split structure.

[0014] [5] In any one of [1] to [4] above, the seat body is a resin molded part formed integrally with the bus bar and the magnetic member. According to this structure, the bus bar, the seat body, and the magnetic member can be configured as an integral component (assembly).

[0015] [6] In the above [5], the seat body has an insulating portion formed by resin entering between the bus bar and the magnetic member. According to this structure, the insulation between the bus bar and the magnetic member can be ensured by the insulating portion.

[0016] [7] In the above [1], the bus bar and the seat body are an integral part formed as one component, and the magnetic member is formed in a manner to surround the integral part from all sides. According to this structure, when the shape of the magnetic member is a shape surrounding the bus bar, the inner diameter of the magnetic member can be suppressed to a minimum, so the impedance of the magnetic member can be set to be larger. Therefore, the noise elimination performance of the magnetic member can be improved.

[0017] [8] In the above [7], the magnetic member is a strip-shaped magnetic foil wound around the integral product a plurality of times. According to this structure, the magnetic member can be formed by a simple method of winding the strip-shaped magnetic foil around the integral product.

[0018] [9] In the above [7], the seat body is an insulating resin that insulates the bus bar, and the magnetic member is formed in a shape surrounding the insulating resin and is a magnetic resin containing magnetic powder. According to this structure, for example, a component having a magnetic member can be manufactured by a simple method such as resin insert molding.

[0019]

[10] In the above [1], the bus bar has an insulating layer on the surface, and the seat body is formed in a shape surrounding the bus bar and is a magnetic resin containing magnetic powder as the magnetic member. According to this structure, since the seat body itself contains magnetic powder, it is not necessary to install a magnetic member of another component on the seat body. Therefore, the seat body can be miniaturized.

[0020]

[11] The insulating layer is an enamel film. According to this structure, a general bus bar whose surface is covered with an enamel film can be used.

[12] In any one of [1] to

[11] above, a sealing portion is provided to seal the space between the bus bar and the seat body. According to this structure, the gap between the bus bar and the seat body is sealed by the sealing portion. Therefore, it is difficult for fluid or foreign matter to enter the gap between the bus bar and the seat body.

[0021]

[13] In any one of [1] to

[12] above, the seat body has: a mounting portion fixed to the mounting partner by a stopper; a first portion extending from the mounting portion toward the load; and a second portion extending from the mounting portion in a direction opposite to the load. According to this structure, the seat body can be mounted to the mounting partner by fixing the mounting portion to the mounting partner by a stopper.

[0022]

[14] In the above

[13] , the magnetic member is arranged at the first portion. According to this structure, even if the second portion is not large enough in the terminal block arrangement space and the magnetic member cannot be arranged at the second portion, the problem can be solved by arranging the magnetic member at the first portion.

[0023]

[15] In the above

[13] , the magnetic member is arranged at the second portion. According to this structure, even if the size of the first portion is insufficient in the configuration space of the terminal block and the magnetic member cannot be arranged at the first portion, the magnetic member can be arranged at the second portion to cope with the problem.

[0024]

[16] In the above

[13] , the terminal block includes a sealing portion that seals between the bus bar and the block body, and the sealing portion is disposed at the second portion. According to this structure, since the sealing portion can be disposed at a position away from the load, the distance between the load and the sealing portion can be lengthened. Therefore, it is difficult for fluid or foreign matter flowing out of the load to reach the sealing portion, which can further help prevent the fluid or foreign matter from leaking from the sealing portion.

[0025]

[17] In any one of the above [1] to

[16] , three busbars of U phase, V phase and W phase are provided, and three-phase AC signals with phases shifted by 120 degrees from each other flow through the busbars. According to this structure, since the three-phase AC signals with phases shifted by 120 degrees from each other flow through the three busbars, even if noise currents are generated in the three busbars, these are offset and easily become "0". Therefore, it is further helpful to improve the surge resistance.

[0026]

[18] In any one of [1] to

[17] above, the bus bar has: a rod-shaped portion at least a portion of which is inserted into the seat body; and a flat plate portion provided at both ends of the rod-shaped portion and processed into a flat plate shape as a connection, and the magnetic member is provided so as to surround the rod-shaped portion from all sides. According to this structure, since a portion of the bus bar is made into a rod shape, the bus bar can be reduced in diameter compared to, for example, a case where the entire bus bar is in a plate shape. Therefore, it helps to miniaturize the size of the terminal seat.

[0027]

[19] In any one of [1] to

[18] above, at least one of the plurality of bus bars has a bend in the portion surrounded by the magnetic member, and the bend is formed by bending in a manner close to the bus bar located at an adjacent position. According to this structure, in the portion surrounded by the magnetic member, the bend can be used to bring the adjacent bus bars as close as possible. Therefore, the size of the magnetic member can be reduced. Furthermore, this further contributes to the miniaturization of the terminal block.

[0028] (Details of the first embodiment of the present invention) The following is a specific example of the terminal block 1 of the present invention with reference to the accompanying drawings. In addition, the present invention is not limited to these examples, but is shown in the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. In each of the drawings, for the sake of convenience, a part of the structure is sometimes enlarged or simplified. In addition, the dimensional ratios of each part are sometimes different from the actual ones.

[0029] (Overview of terminal block 1) like Figure 1 As shown, the terminal block 1 includes one or more bus bars 3 connected to the load 2 at one end 3a of both ends and a base body 4 supporting the bus bars 3. The load 2 is, for example, a motor, and in this case, a three-phase AC motor. For example, three bus bars 3 of U phase, V phase, and W phase are provided. A three-phase AC signal with a phase difference of 120 degrees flows through the bus bars 3. The other end 3b of the bus bar 3 is connected to an inverter 5, and the inverter 5 controls the frequency of the power supplied to the load 2. The high voltage and large current required for the three-phase AC motor flow through the bus bars 3.

[0030] The seat body 4 is mounted on the mounting partner 7 by fitting. The mounting partner 7 is, for example, a housing that accommodates the load 2. The seat body 4 includes: a mounting portion 9 fixed to the mounting partner 7 by a stopper 8; a first portion 10 extending from the mounting portion 9 toward the load 2; and a second portion 11 extending from the mounting portion 9 in a direction opposite to the load 2.

[0031] The mounting portion 9 is formed in a flange shape, for example. Figure 1 A total of two holes 12 for passing the stopper 8 are provided at both ends of the Y-axis direction. The seat body 4 is mounted on the mounting partner 7 by passing the stopper 8 through the collar 13 inserted into the hole 12 and fixing the stopper 8 to the recess 14 of the mounting portion 9. The stopper 8 is, for example, a bolt.

[0032] The first portion 10 is formed in a block shape (e.g., a roughly rectangular parallelepiped shape) into which a plurality of bus bars 3 can be inserted. When the terminal block 1 is mounted on the mounting partner 7, the first portion 10 is engaged with a recess 15 formed on the mounting partner 7. A wall 17 for insulating the adjacent bus bars 3 is formed in the first portion 10. A plurality of (two in this example) holes 18 are formed in the first portion 10, and the holes 18 are used to insert positioning pins (not shown) of the mold when the terminal block 1 is formed by a mold.

[0033] The second portion 11 has a cylindrical portion 16 into which one bus bar 3 is inserted for each bus bar 3. In the case of this example, the second portion 11 has three cylindrical portions 16. like Figure 2 As shown, the terminal block 1 has an elastic member 19 that seals between the block body 4 and the mounting portion 9. The elastic member 19 is, for example, annular. The elastic member 19 is, for example, a rubber filler, and an acrylic material, a silicon filler, or the like is used. The elastic member 19 has a hole 20 for passing the block body 4 (the first portion 10). The elastic member 19 is fixed to the mounting portion 9, for example, by engaging a plurality of pins 21 formed on the back of the mounting portion 9 at the four corners.

[0034] (Shape of bus bar 3) like Figure 3 and Figure 4 As shown, the busbar 3 has: a rod-shaped portion 23 at least a portion of which is inserted into the seat body 4; and a flat plate portion 24, which is processed into a flat plate shape as a connection point for connecting an electric wire or a busbar of the other party (both are omitted in the figure). The rod-shaped portion 23 is formed in a cylindrical shape, for example. The flat plate portion 24 is provided at both ends of the rod-shaped portion 23, and is formed with a hole 25 for inserting a stopper (omitted in the figure) for fixing the electric wire. In the case of this example, the load 2 is electrically connected to one flat plate portion 24, and the inverter 5 is electrically connected to the other flat plate portion 24. The raw material of the busbar 3 is, for example, copper or aluminum.

[0035] (Overview of the Magnetic Member 28) like Figure 3 and Figure 4 As shown, the terminal block 1 includes a magnetic member 28 for suppressing partial discharge caused by a surge voltage generated by driving the load 2. The magnetic member 28 is provided on the block body 4 in a manner surrounding the bus bar 3. The magnetic member 28 is formed into a shape capable of mounting a plurality of bus bars 3. The magnetic member 28 is, for example, a ferrite core.

[0036] like Figure 3 to Figure 5 As shown, the magnetic member 28 has a hole 29 for inserting the bus bar 3 for each bus bar 3. In this example, the holes 29 are provided, for example, three, and are arranged in the long side direction ( Figure 3 The magnetic member 28 is arranged at equal intervals in the Y-axis direction (the Y-axis direction of the busbar 3). The magnetic member 28 is arranged in a manner that surrounds a part of the rod-shaped portion 23 of the busbar 3 from the periphery. The hole 29 is formed, for example, with a circular cross-section. A plurality of (two in this example) holes 30 are formed in the magnetic member 28, and the holes 30 are used to insert the positioning pins (not shown) of the mold when the terminal block 1 is formed by the mold.

[0037] like Figure 6 As shown, the magnetic member 28 is formed by combining two parts. Specifically, the magnetic member 28 is mounted on the bus bar 3 by sandwiching the bus bar 3 by the first part 33 and the second part 34. In addition, the first part 33 and the second part 34 are parts in which the magnetic member 28 is divided into two halves longitudinally and have the same shape.

[0038] like Figure 3 and Figure 4 As shown, the seat body 4 is a resin molded part formed integrally with the bus bar 3 and the magnetic member 28. Specifically, the bus bar 3 and the magnetic member 28 are assembled in a mold, and after the assembly, resin is injected into the mold and cured, thereby manufacturing an assembly of the bus bar 3, the seat body 4, and the magnetic member 28. In this way, the assembly in which the bus bar 3, the seat body 4, and the magnetic member 28 are integrated is manufactured by resin molding.

[0039] (Insulation of Bus Bar and Magnetic Member 28) like Figure 3 and Figure 4 As shown, the seat body 4 has an insulating portion 37, and the insulating portion 37 is formed by resin entering between the bus bar 3 and the magnetic member 28. The insulating portion 37 ensures electrical insulation between the bus bar 3 and the magnetic member 28. In the case of this example, the diameter of the hole 29 is set larger than the diameter of the bus bar 3 (specifically, the rod-shaped portion 23). Thus, the insulating portion 37 is formed by the resin flowing into the gap generated between the bus bar 3 and the magnetic member 28 during resin molding.

[0040] (Overview of the Sealing Section 39) like Figure 5 As shown, the terminal block 1 has a sealing portion 39 that seals the bus bar 3 and the block body 4. The sealing portion 39 is, for example, an adhesive (adhesive tape). The sealing portion 39 is, for example, provided in a ring shape. The sealing portion 39 is, for example, provided between the bus bar 3 and the cylinder 16. The sealing portion 39 ensures watertightness between the bus bar 3 and the block body 4 and tightness that firmly fixes the bus bar 3 to the block body 4.

[0041] (Arrangement Positions of Magnetic Member 28 and Sealing Section 39) like Figure 3 and Figure 4 As shown, the magnetic member 28 is, for example, arranged at the first portion 10 of the seat body 4. The sealing portion 39 is, for example, arranged at the second portion 11 (cylindrical portion 16) of the seat body 4. Thus, in the case of this example, the magnetic member 28 and the sealing portion 39 are arranged at positions opposite to each other with respect to the mounting portion 9 of the seat body 4.

[0042] (Function of the first embodiment) Next, the operation of the terminal block 1 according to the present embodiment will be described. like Figure 7 As shown, in the case of this example, a structure is formed in which the bus bar 3 (specifically, the rod-shaped portion 23) is surrounded by the magnetic member 28. Therefore, even if a surge voltage is generated by driving the load 2, the noise current generated by the surge voltage can be absorbed by the magnetic member 28. In this way, the partial discharge that can be generated by the surge voltage can be suppressed to a lower level through the magnetic shielding effect of the magnetic member 28. Therefore, the surge resistance of the terminal block 1 can be improved. Furthermore, by improving the surge resistance, it is also difficult for the winding of the load 2 to be degraded in insulation.

[0043] In addition, in the case of this example, three-phase AC signals of the U layer, V layer, and W layer flow through the three bus bars 3. In addition, since the three bus bars 3 through which the three-phase AC signals flow are formed into a shape that is collectively covered by one magnetic member 28, the noise currents of the three-phase AC can be offset from each other. Therefore, in the case where the three-phase AC signals flow through the three bus bars 3, as long as the surge resistance countermeasure is obtained by the magnetic member 28 of this example, a high absorption effect of the noise current can be achieved.

[0044] like Figure 3 , Figure 4As shown in the figures, a sealing portion 39 is provided between the bus bar 3 and the seat body 4 to block these gaps. Therefore, even if fluid or foreign matter flows out from the load 2, these can be blocked by the sealing portion 39. Therefore, the fluid or foreign matter flowing out of the load 2 can be suppressed from flowing out of the housing. In addition, since the sealing portion 39 is arranged at the second portion 11, the sealing portion 39 can be as far away from the load 2 as possible. Therefore, it is difficult for the fluid or foreign matter flowing out of the load 2 to reach the sealing portion 39, so it is also difficult for the fluid or foreign matter to leak from the sealing portion 39.

[0045] The bus bar 3 is not plate-shaped (flat plate-shaped) but is formed into a shape having a rod-shaped portion 23. Therefore, the bus bar 3 can be reduced in diameter compared to, for example, a case where the bus bar is entirely plate-shaped. Therefore, the size of the magnetic member 28 or the terminal block 1 can be miniaturized.

[0046] (Effects of the First Embodiment) According to the terminal block 1 of the above-described embodiment, the following effects can be obtained. (1.1) The terminal block 1 includes one or more bus bars 3, a block body 4, and a magnetic member 28. The bus bar 3 is connected to the load 2 at one end 3a of both ends. The block body 4 supports the bus bar 3 and is mounted on the mounting partner 7. The magnetic member 28 is provided on the block body 4 so as to surround the bus bar 3 from the periphery to suppress partial discharge caused by a surge voltage generated by driving the load 2.

[0047] According to this structure, since the magnetic member 28 is arranged around the bus bar 3, the magnetic member 28 can absorb the noise current caused by the surge voltage when the load is driven. Therefore, the magnetic member 28 can suppress the occurrence of partial discharge caused by the surge voltage. Therefore, the surge resistance can be improved.

[0048] (1.2) The magnetic member 28 is formed into a shape capable of mounting a plurality of bus bars 3. According to this structure, since a plurality of bus bars 3 are mounted on one magnetic member 28, the magnetic member 28 can be used to cancel out noise currents that can be generated in each bus bar 3. Therefore, it further contributes to the improvement of surge resistance.

[0049] (1.3) The magnetic member 28 has a hole 29 for inserting the bus bar 3 for each bus bar 3. According to this structure, it is easy to understand which hole 29 of the magnetic member 28 the bus bar 3 is to be mounted in.

[0050] (1.4) The seat body 4 is a resin molded product formed integrally with the bus bar 3 and the magnetic member 28. According to this structure, the bus bar 3, the seat body 4, and the magnetic member 28 can be configured as one integral component (assembly).

[0051] (1.5) The seat body 4 has the insulating portion 37 formed by resin entering between the bus bar 3 and the magnetic member 28. According to this structure, the insulating portion 37 can ensure insulation between the bus bar 3 and the magnetic member 28.

[0052] (1.6) The terminal block 1 includes a sealing portion 39 that seals the space between the bus bar 3 and the block body 4. According to this structure, the gap between the bus bar 3 and the block body 4 is sealed by the sealing portion 39. Therefore, it is difficult for fluid or foreign matter to enter the gap between the bus bar 3 and the block body 4.

[0053] (1.7) The seat body 4 has: a mounting portion 9 fixed to the mounting partner 7 by a stopper 8; a first portion 10 extending from the mounting portion 9 toward the load 2; and a second portion 11 extending from the mounting portion 9 in a direction opposite to the load 2. According to this structure, the seat body 4 can be mounted on the mounting partner 7 by fixing the mounting portion 9 to the mounting partner 7 by the stopper 8.

[0054] (1.8) The magnetic member 28 is disposed in the first portion 10. According to this structure, even if the second portion 11 is not large enough in the configuration space of the terminal block 1 and the magnetic member 28 cannot be disposed in the second portion 11, the magnetic member 28 can be disposed in the first portion 10 to cope with the problem.

[0055] (1.9) The seal portion 39 is disposed at the second portion 11. According to this structure, since the seal portion 39 can be disposed at a position away from the load 2, the distance between the load 2 and the seal portion 39 can be lengthened. Therefore, it is difficult for the fluid (such as oil of the motor) or foreign matter flowing out of the load 2 to reach the seal portion 39, which can further help prevent the fluid or foreign matter from leaking from the seal portion 39.

[0056] (1.10) Three bus bars 3 of U phase, V phase, and W phase are provided. Three-phase AC signals whose phases are shifted by 120 degrees from each other flow through the bus bars 3. According to this structure, since three-phase AC signals whose phases are shifted by 120 degrees from each other flow through the three bus bars 3, even if noise currents are generated in the three bus bars 3, these are offset from each other and easily become "0". Therefore, it further contributes to the improvement of surge resistance.

[0057] (1.11) The bus bar 3 has a rod-shaped portion 23 and a flat plate portion 24. At least one portion of the rod-shaped portion 23 is inserted into the seat body 4. The flat plate portion 24 is provided at both ends of the rod-shaped portion 23 and is processed into a flat plate shape as a connection portion. The magnetic member 28 is provided so as to surround the rod-shaped portion 23 from all sides. According to this structure, since a part of the bus bar 3 is made into a rod shape, the bus bar 3 can be reduced in diameter compared to, for example, a case where the entire bus bar is in a plate shape. Therefore, it helps to miniaturize the size of the terminal seat 1.

[0058] (Second embodiment) Next, the second embodiment is described. In addition, the second embodiment is an example in which the magnetic member 28 of the first embodiment is changed to another member. Therefore, the same reference numerals are attached to the same parts as the first embodiment and the description thereof is omitted, and the different parts are described in detail.

[0059] (Structure of terminal block 1) like Figure 8 As shown, the bus bar 3 and the seat body 4 are an integral part 44 formed as one component. In the case of this example, the integral part 44 is formed by, for example, insert molding of a resin. Specifically, the integral part 44 is formed by insert molding in which the bus bar 3 is assembled in a mold and filled with resin. In the case of this example, the seat body 4 is a resin molded part. In addition, the integral part 44 can also be formed by a method other than insert molding.

[0060] like Fig. 9 As shown, the magnetic member 28 is formed in a manner of surrounding the integral product 44 from all sides. In the case of this example, the magnetic member 28 is a strip-shaped magnetic foil 45 that is wound around the integral product 44 for multiple turns. In this way, the magnetic member 28 is formed by winding the strip-shaped magnetic foil 45 around the integral product 44. The magnetic foil 45 is, for example, wound around the outer surface of the first portion 10 of the seat body 4. The wound magnetic foil 45 is formed into a roughly cylindrical shape. The roughly cylindrical magnetic foil 45 is formed into a flat elliptical shape when viewed from the axial direction. As the material of the magnetic foil 45, for example, permalloy, nickel, nickel-molybdenum-iron superconducting magnetic alloy, iron, ferrite, or a combination of two or more of these can be used.

[0061] like Figure 8 As shown, the terminal block 1 is provided with a cover 46 for protecting the magnetic foil 45. The cover 46 has a cover body 47 covering the magnetic foil 45, and a flange portion 48 extending in a direction intersecting the cover body 47. The flange portion 48 is formed over the entire circumference of the opening 49 of the cover body 47. The flange portion 48 has a plurality of holes 50 for passing the collar 13. The elastic member 19 is arranged between the mounting counterpart 7 and the flange portion 48.

[0062] (Function of the Second Embodiment) Next, the operation of the terminal block 1 according to the present embodiment will be described. like Fig.10 As shown in (a), when manufacturing the terminal block 1, three-phase bus bars 3 for each of the U phase, V phase, and W phase are prepared. Fig.10 As shown in (b), the bus bars 3 are assembled in a mold and filled with resin by insert molding to produce an integrated product 44 in which the bus bars 3 and the seat body 4 are integrated. The three bus bars 3 are electrically insulated by the resin seat body 4 formed by insert molding.

[0063] Then, if Fig.10 As shown in (c), a strip-shaped magnetic foil 45 is wound multiple times on the outer surface of the integral product 44. The combination of the thickness, number of turns, material, etc. of the magnetic foil 45 is appropriately set according to the required degree of noise absorption. In addition, an adhesive may be applied to the surface of the magnetic foil 45. In this case, the overlapping magnetic foils 45 can be fixed to each other, so that the magnetic foil 45 can be prevented from accidentally falling off.

[0064] like Fig.10 As shown in (d), a cover 46 is attached to the integral product 44 on which the magnetic foil 45 is wound. The cover 46 is attached so as to surround the magnetic foil 45 from the periphery. As described above, the terminal block 1 is assembled.

[0065] (Effects of the Second Embodiment) According to the terminal block 1 of the above embodiment, in addition to the effects described in the above embodiment, the following effects can be obtained.

[0066] (2.1) The bus bar 3 and the seat body 4 are an integral part 44 formed as one component. The magnetic member 28 (the magnetic foil 45 in this example) is formed so as to surround the integral part 44 from the periphery. According to this structure, when the shape of the magnetic member 28 is a shape surrounding the bus bar 3, the inner diameter of the magnetic member 28 can be suppressed to a minimum, so the impedance of the magnetic member 28 can be set larger. Therefore, the noise elimination performance of the magnetic member 28 can be improved.

[0067] (2.2) The magnetic member 28 is the strip-shaped magnetic foil 45 wound multiple times around the integral product 44. According to this structure, the magnetic member 28 can be formed by a simple method of winding the strip-shaped magnetic foil 45 around the integral product 44.

[0068] (Third embodiment) Next, the third embodiment will be described. In the third embodiment, only the parts that are different from the first and second embodiments will be described in detail.

[0069] (Structure of terminal block 1) like Fig.11 As shown, the seat body 4 is an insulating resin 53 that insulates the bus bar 3. The bus bar 3 and the insulating resin 53 are formed, for example, by insert molding of resin. Specifically, the bus bar 3 and the insulating resin 53 are formed into an integral product 44 by insert molding, for example, by assembling the bus bar 3 in a mold and filling the mold with resin. In this example, the insulating resin 53 is a resin molded part.

[0070] The magnetic member 28 is formed in a shape surrounding the insulating resin 53, and is a magnetic resin 55 containing magnetic powder 54. The magnetic resin 55 is formed, for example, on the main part of the insulating resin 53, that is, the outer surface of the first part 10. The magnetic resin 55 is formed, for example, in a roughly cylindrical shape. In addition, the roughly cylindrical magnetic resin 55 is formed in a flat elliptical shape when viewed from the axial direction. As the material of the magnetic powder 54, for example, permalloy, nickel, nickel-molybdenum-iron superconducting magnetic alloy, iron, ferrite, or a combination of two or more of these are used. The insulating resin 53 and the magnetic resin 55 can be formed, for example, by insert molding, or by other methods.

[0071] (Function of the third embodiment) Next, the operation of the terminal block 1 according to the present embodiment will be described. like Fig.12 As shown in (a), when manufacturing the terminal block 1, three-phase bus bars 3 for each of the U phase, V phase, and W phase are prepared. Fig.12 As shown in (b), the bus bars 3 are placed in a mold and filled with resin by insert molding to produce an integrated product 44 in which the bus bars 3 and the insulating resin 53 are integrated. The three bus bars 3 are electrically insulated by the insulating resin 53 formed by insert molding.

[0072] Then, if Fig.12 As shown in (c), a magnetic resin 55 is insert-molded on the integral product 44 in which the bus bar 3 and the insulating resin 53 are integrated. Specifically, the integral product 44 is assembled into a mold, and a resin containing the magnetic powder 54 is filled into the mold, thereby forming an assembly in which the magnetic resin 55 is integrated. In this way, an assembly in which the integral product 44 is surrounded by the magnetic resin 55 is manufactured.

[0073] (Effects of the third embodiment) According to the terminal block 1 of the above embodiment, in addition to the effects described in the above embodiment, the following effects can be obtained.

[0074] (3.1) The socket body 4 is an insulating resin 53 that insulates the bus bar 3. The magnetic member 28 is formed into a shape surrounding the insulating resin 53 and is a magnetic resin 55 containing magnetic powder 54. According to this structure, for example, a component having the magnetic member 28 can be manufactured by a simple method such as resin insert molding.

[0075] (Fourth embodiment) Next, a fourth embodiment will be described. In the fourth embodiment, only the parts that are different from the first to third embodiments will be described in detail.

[0076] (Structure of terminal block 1) like Fig.13As shown, the bus bar 3 has an insulating layer 58 on the surface. The insulating layer 58 is, for example, an enamel film 59. The insulating layer 58 is preferably formed on the entire surface of the bus bar 3. In addition, the insulating layer 58 is not limited to the enamel film 59, and for example, a tube such as a heat shrink tube, a resin tape, etc. can also be used.

[0077] The seat body 4 is formed in a shape surrounding the bus bar 3, and is a magnetic resin 61 containing a magnetic powder 60 as a magnetic member 28. In this way, the seat body 4 of this example is a magnetic resin 61 containing a magnetic powder 60. The main part of the magnetic resin 61, that is, the first part 10 is formed in a flat elliptical shape when viewed from the axial direction of the bus bar 3. As the material of the magnetic powder 60, for example, the same material as that of the third embodiment is used. The magnetic resin 61 can be formed by, for example, insert molding or other methods.

[0078] (Function of the fourth embodiment) Next, the operation of the terminal block 1 according to the present embodiment will be described. Fig.14 As shown in (a), when manufacturing the terminal block 1, a three-phase (U phase, V phase, W phase) bus bar 3 having an insulating layer 58 formed on the surface is prepared. Fig.14 As shown in (b), the bus bars 3 are placed in a mold and filled with a resin containing magnetic powder 60 to produce an assembly in which the bus bars 3 and the magnetic resin 61 are integrated. The three bus bars 3 are electrically insulated from the magnetic resin 61 by the insulating layer 58 on the surface.

[0079] (Effects of the Fourth Embodiment) According to the terminal block 1 of the above embodiment, in addition to the effects described in the above embodiment, the following effects can be obtained.

[0080] (4.1) The bus bar 3 has an insulating layer 58 on the surface. The seat body 4 is formed in a shape surrounding the bus bar 3 and is a magnetic resin 61 containing magnetic powder 60 as the magnetic member 28. According to this structure, since the seat body 4 itself contains the magnetic powder 60, it is not necessary to install the magnetic member 28 of another component on the seat body 4. Therefore, the seat body 4 can be miniaturized.

[0081] (4.2) The insulating layer 58 is the enamel film 59. According to this structure, the general-purpose bus bar 3 whose surface is covered with the enamel film 59 can be used. (Other embodiments) In addition, this embodiment can be implemented as the following modifications. This embodiment and the following modifications can be implemented in combination with each other within the range that there is no technical contradiction.

[0082] ■ In the first and second embodiments, Fig.15As shown, the magnetic member 28 may be arranged in the second portion 11 instead of the first portion 10 of the seat body 4. In this case, the shape of the second portion 11 is set to be block-shaped, and the magnetic member 28 is arranged inside the second portion 11. According to this structure, even if the size of the first portion 10 is insufficient in the configuration space of the terminal seat 1 and the magnetic member 28 cannot be arranged in the first portion 10, it can be dealt with by arranging the magnetic member 28 in the second portion 11. In addition, when the magnetic member 28 is arranged in the second portion 11, it is preferred to arrange the sealing portion 39 in the first portion 10.

[0083] ■In the first embodiment, if Fig.16 As shown, the hole 29 for inserting the bus bar 3 may be formed into a shape that can collectively accommodate multiple bus bars 3, for example. That is, the magnetic component 28 may also have a hole 29 that can collectively insert multiple bus bars 3. As the shape of the hole 29 in this case, for example, a long hole shape viewed from the axial direction of the hole 29 can be listed. According to this structure, multiple bus bars 3 can be collectively placed in the hole 29 of the magnetic component 28, so it is easy to assemble the bus bar 3 in the hole 29. In addition, the magnetic component 28 can also be set as an integrated component structure instead of a split structure.

[0084] ■ In each embodiment, if Fig.17 As shown, at least one of the plurality of bus bars 3 may also have a bent portion 41 at a location surrounded by the magnetic member 28, and the bent portion 41 is bent so as to be close to the bus bar 3 located at an adjacent position. Fig.17 In the example of , a bent portion 41 is provided in the middle of the bus bars 3 on both sides relative to the central bus bar 3. According to this structure, in the portion surrounded by the magnetic member 28, the bent portions 41 can be used to make the bus bars 3 adjacent to each other as close as possible. Therefore, the size of the magnetic member 28 can be reduced. Furthermore, it further contributes to the miniaturization of the terminal block 1.

[0085] ■ In the second to fourth embodiments, Fig.18 As shown, in the case of using a bus bar 3 having a bent portion 41 and a cylindrical magnetic member 28, when the inner diameter of the magnetic member 28 is set to a minimum in order to make the magnetic member 28 have a higher noise elimination performance, when the magnetic member 28 is inserted into the seat body 4, the magnetic member 28 interferes with the end of the bus bar 3 and cannot be inserted. However, in the case where the magnetic member 28 is a magnetic foil 45, a magnetic resin 55, or 61, there is no need to insert the magnetic member 28 into the seat body 4, so the inner diameter of the magnetic member 28 can be set to a minimum. Therefore, the effect is also high in this regard.

[0086] ■ In the first embodiment, the magnetic member 28 is not limited to a shape that collectively covers the plurality of bus bars 3. For example, one magnetic member 28 may be provided for each bus bar 3. ■ In each embodiment, the magnetic member 28 is not limited to a ferrite core (made of ferrite), but may be a magnetic body such as a ferromagnetic body. The magnetic member 28 may be configured to consume or absorb noise current in the bus bar 3 near the bus bar 3 as, for example, iron loss or the like.

[0087] ■In each embodiment, the number of the bus bars 3 is not limited to three, and may be two or less, or may be four or more. ■ In each embodiment, when a plurality of bus bars 3 are provided, these bus bars 3 are not limited to all having the same shape, and at least one may have a different shape.

[0088] ■In the first and second embodiments, the assembly of the bus bar 3, the seat body 4, and the magnetic member 28 can be formed by a method other than resin molding. For example, a method of manually attaching the magnetic member 28 to the bus bar 3 and the seat body 4 can also be used. In this way, the assembly can also be formed by various working methods.

[0089] ■ In each embodiment, the rod-shaped portion 23 is not limited to a cylindrical shape, and may be a polygonal column shape such as a quadrangular column shape, for example. ■ In each embodiment, the insulating portion 37 is not limited to a resin portion that is a part of the resin mold, and may be, for example, a dedicated component that is separate from the seat body 4 .

[0090] ■In each embodiment, both the magnetic member 28 and the sealing portion 39 may be provided in the first portion 10 (or the second portion 11 ). ■In each embodiment, the sealing portion 39 may be a sealing ring (rubber ring).

[0091] ■In each embodiment, the terminal block 1 may be formed into a shape having only the mounting portion 9 , for example, and the magnetic member 28 may be disposed on the mounting portion 9 . ■ In each embodiment, the terminal block 1 may be configured to have, for example, only the first portion 10 , and the first portion 10 may be fixed to the mounting partner 7 . The same may be said about the second portion 11 .

[0092] ■In each embodiment, the signal flowing through the bus bar 3 is not limited to a three-phase AC signal, but may be a signal other than this. ■In each embodiment, the device connected to the other end 3 b of the bus bar 3 is not limited to the inverter 5 , and may be other devices such as a transformer, for example.

[0093] ■In each embodiment, the load 2 is not limited to a motor, and may be, for example, a resistance load, a solenoid, a lamp, or the like. ■ In each embodiment, the terminal block 1 is not limited to being mounted on a vehicle, but can also be used in equipment or devices in other fields.

[0094] ■In each embodiment, the expression "at least one" used in the present invention means "one or more" of the desired options. As an example, the expression "at least one" used in the present invention means "only one option" or "both options" if the number of options is two. As another example, the expression "at least one" used in the present invention means "only one option" or "a combination of two or more options" if the number of options is three or more.

[0095] ■ In each embodiment, the present invention is described according to an embodiment, but it should be understood that the present invention is not limited to the embodiment or structure. The present invention also includes various modifications or modifications within the equivalent range. In addition, various combinations or methods, as well as other combinations or methods including only one element, above or below, also belong to the scope or concept of the present invention.

[0096] ■ Figures 3 to 12 As shown, the rod-shaped portion 23 of the bus bar 3 may not have a non-metallic insulating layer, which may be an enamel film, on its surface. Figures 3 to 12 The seat body 4 may not contain magnetic powder. Figures 3 to 7 As shown, the length portion of the rod-shaped portion 23 of the bus bar 3 without the non-metallic insulating layer and the entire magnetic member 28 may also be buried in the seat body 4. Figures 8 to 12 As shown, the magnetic member 28 (magnetic foil 45, magnetic resin 55) may be mounted on the outer surface of the seat body 4 in such a manner as to surround the length portion of the rod-shaped portion 23 of the bus bar 3 without the non-metallic insulating layer that is buried in the seat body 4 without the magnetic powder. Fig.13 , 14 As shown, the insulating layer 58 and the rod-shaped portion 23 of the bus bar 3 may be buried in the seat body 4 containing the magnetic powder 60 as the magnetic member 28. The seat body 4 may not be in direct contact with the rod-shaped portion 23 of the bus bar 3, but may be in direct contact with the insulating layer 58.

[0097] The flat plate portion 24 and the rod-shaped portion 23 of the bus bar 3 in the illustrated embodiment may be referred to as a flat electrical connection end portion and a non-flat intermediate rod, respectively. The seat body 4 in the illustrated embodiment may be referred to as a bus bar support block.

[0098] [Supplementary Note 1] According to several aspects of the present invention, the terminal block may include: a plurality of metal bus bars; a bus bar supporting block fixedly supporting the plurality of metal bus bars; and A magnetic member for improving the surge resistance of the terminal block, Each of the plurality of bus bars may include two flat-shaped electrical connection ends and a non-flat-shaped intermediate bar having a bar length and a bar thickness between the two flat-shaped electrical connection ends. The magnetic member may be fixed to the bus bar support block at a position capable of surrounding at least a portion of the bar length of the non-flat intermediate bar of each bus bar.

[0099] According to the structure of Supplementary Note 1, the magnetic member can be positioned in the non-flat intermediate rod of the entire length of each bus bar where the influence of the surge voltage is easily manifested, so it is advantageous to reduce the manifestation of the influence of the surge voltage and reduce the rod thickness (conductor cross-sectional area) of the non-flat intermediate rod of the bus bar. For example, it is advantageous to reduce the margin of the conductor cross-sectional area of ​​the bus bar with respect to the voltage.

[0100] [Supplementary Note 2] In some aspects of the present invention, the entire magnetic member may be embedded in the bus bar support block, or the magnetic member may not be visually recognized from the outside of the bus bar support block.

[0101] [Supplementary Note 3] In some embodiments of the present invention, the magnetic member may be a foil wound around the bus bar support block, the foil may be buried in the bus bar support block, may be visually confirmed from the outside of the bus bar support block, and may be replaceable, for example.

[0102] [Supplementary Note 4] In several embodiments of the present invention, the magnetic member may be a tube that accommodates a portion of the bus bar support block. The tube may be buried in the bus bar support block, may be visually confirmed from the outside of the bus bar support block, and may be replaceable, for example. Description of Reference Numerals

[0103] 1 Terminal block 2 Load 3 Busbars 3a One end 3b The other end 4-seat main body 5 Inverter 7 Install the other party 8 Stopper 9 Installation 10 Part 1 11 Part 2 12 holes 13 Ring 14 concavity 15 concavity 16 Barrel 17 walls 18 holes 19 Elastic member 20 holes 21 Pins 23 Rod-shaped part 24 Flat Plate 25 holes 28 Magnetic components 29 holes 30 holes 33 Part 1 34 Part 2 37 Insulation 39 Sealing part 41 Bending part 44 Integrated Products 45 Magnetic Foil 46 Hood 47 Cover body 48 Flange 49 Opening 50 holes 53 Insulating resin 54 Magnetic powder 55 Magnetic resin 58 Insulation layer 59 Enamel film 60 Magnetic powder 61 Magnetic resin

Claims

1. A terminal block having: One or more bus bars, connected to loads at one end of each end; a seat body supporting the bus bar and mounted on the mounting partner; and The magnetic member is provided on the socket body so as to surround the bus bar from the periphery to suppress partial discharge caused by a surge voltage generated by driving the load.

2. The terminal block according to claim 1, wherein: The magnetic member is formed in a shape capable of mounting the plurality of bus bars.

3. The terminal block according to claim 2, wherein: The magnetic member has a hole for inserting the bus bar for each of the bus bars.

4. The terminal block according to claim 2, wherein: The magnetic member has one hole into which the plurality of bus bars can be collectively inserted.

5. The terminal block according to any one of claims 1 to 4, wherein: The seat body is a resin molded part formed integrally with the bus bar and the magnetic member.

6. The terminal block according to claim 5, wherein: The seat body has an insulating portion formed by resin entering between the bus bar and the magnetic member.

7. The terminal block according to claim 1, wherein: The bus bar and the seat body are an integral part. The magnetic member is formed so as to surround the integral product from all sides.

8. The terminal block according to claim 7, wherein: The magnetic member is a belt-shaped magnetic foil wound a plurality of times around the integral product.

9. The terminal block according to claim 7, wherein: The seat body is an insulating resin that insulates the bus bar. The magnetic member is formed in a shape surrounding the insulating resin and is a magnetic resin containing magnetic powder.

10. The terminal block according to claim 1, wherein: The bus bar has an insulating layer on the surface, The seat body is formed in a shape surrounding the bus bar and is a magnetic resin containing magnetic powder as the magnetic member.

11. The terminal block according to claim 10, wherein: The insulating layer is an enamel film.

12. The terminal block according to any one of claims 1 to 11, wherein: A sealing portion is provided to seal between the bus bar and the seat body.

13. The terminal block according to any one of claims 1 to 12, wherein: The seat body has: A mounting portion, fixed to the mounting counterpart by a stopper; a first portion extending from the mounting portion toward the load; and The second portion extends from the mounting portion in a direction opposite to the load.

14. The terminal block according to claim 13, wherein: The magnetic member is arranged at the first portion.

15. The terminal block according to claim 13, wherein: The magnetic member is arranged at the second portion.

16. The terminal block according to claim 13, wherein: A sealing portion is provided for sealing between the bus bar and the seat body, The sealing portion is disposed at the second location.

17. The terminal block according to any one of claims 1 to 16, wherein: The three bus bars of the U phase, the V phase and the W phase are provided, A three-phase AC signal having phases that are 120 degrees different from each other flows through the bus bar.

18. The terminal block according to any one of claims 1 to 17, wherein: The bus bar has: A rod-shaped portion at least partially inserted into the seat body; and The flat plate portion is disposed at both ends of the rod-shaped portion and is processed into a flat plate shape as a connection. The magnetic member is provided so as to surround the rod-shaped portion from all sides.

19. The terminal block according to any one of claims 1 to 18, wherein: At least one of the plurality of bus bars has a bent portion at a location surrounded by the magnetic member, and the bent portion is bent so as to approach the bus bar located at an adjacent position.

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