WO2025057415A1 - Electronic apparatus and inverter device - Google Patents

Abstract

Provided is an electronic apparatus capable of forming, with busbars, a complex electroconductive path on a substrate. This electronic apparatus has: a substrate on which a plurality of electronic components are mounted in rows; and a first electrode busbar and a second electrode busbar that are provided in said order and spaced apart on the substrate. The first electrode busbar and the second electrode busbar each have: two conductor plates that are parallel to each other; a connection conductor plate that electrically connects the two conductor plates; and an input electrode that supplies power to the two conductor plates. Each of the conductor plates is disposed adjacent to the electronic components and electrically connected to the electronic components. The connection conductor plate of the first electrode busbar is disposed so as to overlap with the connection conductor plate of the second electrode busbar.

Description

Electronic equipment and inverter device

The present invention relates to electronic devices and inverter devices.

An inverter device has been proposed in which multiple capacitors are mounted in a row on the upper board of two vertically arranged boards, and multiple power elements are mounted in a row on the lower board (see Patent Document 1). In the inverter device described in Patent Document 1, a bus bar arranged near the center of the lower board is electrically connected to the copper foil pattern on the upper board. When power is supplied from the edge of the lower board to the power element mounted in the center of the lower board, power is supplied to the power element arranged in the center of the lower board via the copper foil pattern.

JP 2014-023181 A

When power is supplied to the power elements via the copper foil pattern on the upper board, the upper board can be heated by the current flowing through the copper foil pattern, which can adversely affect heat-sensitive electronic components such as capacitors placed on the upper board.

One aspect of the disclosed technology aims to provide electronic devices and inverter devices that can form complex conductive paths on a substrate using bus bars.

One aspect of the disclosed technology is exemplified by the following electronic device. This electronic device has a substrate on which a number of electronic components are mounted in a row, and a first electrode bus bar and a second electrode bus bar arranged in sequence and spaced apart on the substrate, and each of the first electrode bus bar and the second electrode bus bar has two conductor plates parallel to each other, a connection conductor plate electrically connecting the two conductor plates, and an input electrode supplying power to the two conductor plates. Each of the conductor plates is disposed adjacent to the electronic components and electrically connected to the electronic components, and the connection conductor plate of the first electrode bus bar is disposed so as to overlap the connection conductor plate of the second electrode bus bar.

The disclosed technology makes it possible to provide electronic devices that can form complex conductive paths on a substrate using bus bars.

FIG. 1 is a perspective view illustrating an example of the appearance of an inverter device according to an embodiment. FIG. 2 is a diagram illustrating an inverter circuit of the inverter device according to the embodiment. FIG. 3 is a top view illustrating a state in which a control board is removed in the inverter circuit. FIG. 4 is a side view illustrating a state in which a control board is removed in the inverter circuit. FIG. 5 is a top view illustrating a state in which a control board and a capacitor board are removed in the inverter circuit. FIG. 6A is a first diagram illustrating an example of an input electrode bus bar. FIG. 6B is a second diagram illustrating an example of an input electrode bus bar. FIG. 7A is a third diagram illustrating an example of an input electrode bus bar. FIG. 7B is a fourth diagram illustrating an example of an input electrode bus bar. FIG. 8A is a first diagram illustrating an arrangement of input electrodes in an inverter circuit. FIG. 8B is a second diagram illustrating the arrangement of input electrodes in the inverter circuit. FIG. 9 is a diagram showing a schematic diagram of a flow of a current input from an input electrode. FIG. 10 is a diagram illustrating an arrangement of the extension portion, the output electrode bus bar, and the power element in the embodiment. FIG. 11A is a first diagram illustrating variations in the shape of the extension portion as viewed in the Z direction. FIG. 11B is a second diagram illustrating variations in the shape of the extension portion as viewed in the Z direction.

<Embodiment>
Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing an example of the appearance of an inverter device 100 according to an embodiment. The inverter device 100 includes a housing 11, a heat sink 12, and a lid 13. The housing 11 is attached to the lid 13 by engaging claws 111, 112, and 113 formed on the housing 11 with claws 136, 137, and 138 formed on the lid 13. The heat sink 12 is arranged so as to be in thermal contact with the board housed in the housing 11 in order to dissipate heat generated by the board and various electronic components housed in the housing 11. A connection terminal 15 for connecting an external device such as a computer is provided on the outer surface of the housing 11. In FIG. 1, the direction from the heat sink 12 toward the lid 13 is the +Y direction, the direction from the input electrode 421 toward the input electrode 411 is the +X direction, and the direction perpendicular to the X direction and the Y direction and from the output electrode 521 toward the breathing valve 14 is the +Z direction. Moreover, the +Y direction is the upward direction, and the opposite direction is the downward direction.

The lid 13 is formed with through holes 131, 132, 133, 134, and 135 that penetrate the lid 13 in the thickness direction. An input electrode 411 is provided in the through hole 131 so as to protrude from the lid 13. An input electrode 421 is provided in the through hole 132 so as to protrude from the lid 13. An input terminal 412 is provided in the input electrode 411, and an input terminal 422 is provided in the input electrode 421. The input terminals 412 and 422 are, for example, screw holes. For example, a screw-shaped terminal of a power supply is fixed to the input terminals 412 and 422. An output electrode 511 is provided in the through hole 133 so as to protrude from the lid 13. An output electrode 521 is provided in the through hole 134 so as to protrude from the lid 13. An output electrode 531 is provided in the through hole 135 so as to protrude from the lid 13.

The inverter device 100 converts the DC power input via the input electrodes 411 and 421 into three-phase AC power in an inverter circuit inside the inverter device 100, and outputs the converted three-phase AC power via output electrodes 511, 521, and 531. In the inverter device 100, for example, positive DC power is input to the input electrode 411, and negative DC power is input to the input electrode 421. That is, the positive terminal of the power supply is connected to the input terminal 412 of the input electrode 411, and the negative terminal of the power supply is connected to the input terminal 422 of the input electrode 421. In addition, in the inverter device 100, for example, U-phase AC power is output from the output electrode 511, V-phase AC power is output from the output electrode 521, and W-phase AC power is output from the output electrode 531. For example, when the inverter device 100 is connected to a motor, the output electrode 511 is connected to the U-phase terminal of the motor, the output electrode 521 is connected to the V-phase terminal of the motor, and the output electrode 531 is connected to the W-phase terminal. The direction of the current flowing through the input electrodes 411, 421 and the output electrodes 511, 521, 531 changes depending on the switching state of the power element 40 (see FIG. 5). The positive and negative terminals are examples of "power supply terminals."

FIG. 2 is a diagram illustrating an inverter circuit 200 of an inverter device 100 according to an embodiment. In the inverter device 100, the inverter circuit 200 is housed in a main body formed by a housing 11, a heat sink 12, and a lid portion 13. The inverter circuit 200 includes a control board 2, a capacitor board 3, and a power board 4. The control board 2, the capacitor board 3, and the power board 4 are arranged in a row in the Y direction.

The control board 2 is a board on which a circuit is mounted that controls the conversion of DC power to AC power by the inverter device 100. For example, the control board 2 is mounted with a circuit that turns the power of the inverter device 100 on and off and a circuit that controls the start and end of the conversion of the DC power input from the input electrodes 411, 421 to AC power.

The capacitor board 3 is a board on which a plurality of capacitors 30 are arranged. FIG. 3 is a top view illustrating the inverter circuit 200 with the control board 2 removed. FIG. 4 is a side view illustrating the inverter circuit 200 with the control board 2 removed. The capacitor board 3 is formed, for example, in a substantially rectangular plate shape when viewed in the Y direction. Recesses 31, 32, 33, 34, 35, and 36 are formed at positions corresponding to the input electrodes 411 and 421 and the output electrodes 511, 521, and 531 of the capacitor board 3, respectively. The input electrodes 411 and 421 and the output electrodes 511, 521, and 531 protrude upward from the capacitor board 3 via the recesses 31, 32, 33, 34, 35, and 36. The capacitor board 3 is fixed to the input electrode bus bars 41 and 42 by, for example, screws 91. The capacitor board 3 is an example of an "upper board".

The power board 4 is a board on which multiple power elements 40 are arranged. FIG. 5 is a top view illustrating the inverter circuit 200 with the control board 2 and capacitor board 3 removed. The power board 4 is formed, for example, in the shape of a substantially rectangular plate when viewed in the Y direction. The power board 4 is provided with input electrode bus bars 41, 42, output electrode bus bars 51, 52, 53, and multiple power elements 40. The power elements 40 include, for example, switching elements with diodes connected in parallel.

The input electrode busbars 41, 42 are plate-shaped members that receive DC power input from the input electrodes 411, 421. The input electrode busbars 41, 42 are formed of a conductor such as metal. The input electrode busbars 41, 42 are fixed to the power board 4 by screws 92. Figures 6A and 6B are diagrams showing an example of the input electrode busbar 41. Figure 6A is a top view of the input electrode busbar 41, and Figure 6B is a side view of the input electrode busbar 41. The input electrode busbar 41 has extensions 413, 414 that are parallel to each other, and a connection portion 415 that connects the extensions 413 and 414. The extensions 413, 414 are members that extend in the Z direction. The connection portion 415 is a member that extends in the X direction. The connection portion 415 connects the end of the extension portion 413 in the +Z direction to the end of the extension portion 414 in the +Z direction, and the input electrode bus bar 41 is formed in a U-shape when viewed from above. The extension portions 413 and 414 are formed with screw holes 418, for example, arranged in the Z direction, into which screws 92 for fixing the input electrode bus bar 41 to the power board 4 are inserted. The extension portions 413 and 414 are formed with screw holes 419, for example, arranged in the Z direction, into which screws 91 for fixing the capacitor board 3 to the power board 4 are inserted. The end of the input electrode 411 on the extension portion 413 side is formed with a reinforcing portion 417 for reinforcing the connection between the input electrode 411 and the extension portion 413. Since the input electrode bus bar 41 is formed of a conductor, the power input through the input electrode 411 is supplied to the extension portions 413 and 414 and the connection portion 415.

The input electrode 411 is erected so as to protrude upward from the end of the extension 413 in the +Z direction. The connection portion 415 includes a thin portion 416A and a base portion 416B. The base portion 416B is disposed on the extension 413 side of the connection portion 415. The thin portion 416A is disposed on the extension 414 side of the connection portion 415. The thin portion 416A is formed to be thinner in the Y direction than the base portion 416B. As can be seen from FIG. 6B, the extensions 413 and 414 are formed in a trapezoidal shape when viewed in the Z direction, and the width W1 of the upper base is larger than the width W2 of the lower base. The width W1 of the upper base is determined so that the distance between the screw hole 418 and the ends 413A and 414A of the extensions 413 and 414 is a predetermined distance that ensures the rigidity of the input electrode busbar 41. That is, the opening of the screw hole 418 on the surface (top surface) opposite to the surface (bottom surface) of the input electrode bus bar 41 facing the power board 4 is formed smaller than the width W1 of the upper bottom. Also, the opening of the screw hole 418 on the surface of the input electrode bus bar 41 facing the power board 4 is formed smaller than the width W2 of the lower bottom. As can be understood by referring to FIG. 5, the connection portion 415 is disposed in an area of the power board 4 where the power element 40 is not disposed (an area different from the power element 40). In other words, the connection portion 415 is disposed in an area of the power board 4 that does not overlap with the power element 40 in the Y direction.

7A and 7B are diagrams showing an example of the input electrode busbar 42. FIG. 7A is a top view of the input electrode busbar 42, and FIG. 7B is a side view of the input electrode busbar 42. The input electrode busbar 42 has extensions 423 and 424 parallel to each other, and a connection portion 425 connecting the extensions 423 and 424. The extensions 423 and 424 are members extending in the Z direction. The connection portion 425 is a member extending in the X direction. The connection portion 425 connects one end of the extension 423 to one end of the extension 424, and the input electrode busbar 42 is formed in a U-shape when viewed from above. The extensions 423 and 424 have screw holes 428, for example, two each, arranged side by side in the Z direction, into which screws 92 are inserted to fix the input electrode busbar 42 to the power board 4. Further, the extensions 423 and 424 have screw holes 429, into which screws 91 for fixing the capacitor board 3 to the power board 4 are inserted, formed side by side in the Z direction, for example. A reinforcing portion 427 for reinforcing the connection between the input electrode 421 and the extension 423 is formed at the end of the input electrode 421 on the extension 423 side. Since the input electrode bus bar 42 is formed of a conductor, the power input via the input electrode 421 is supplied to the extensions 423 and 424 and the connection portion 425. The height H3 of the extensions 413, 414, 423 and 424 is higher than the height H2 of the output electrode bus bars 51, 52 and 53, and the capacitor board 3 is supported by the extensions 413, 414, 423 and 424, so that a gap C1 (see FIG. 4 ) that ensures an insulation distance is formed between the capacitor board 3 and the output electrode bus bars 51, 52 and 53. The extensions 413, 414, 423, and 424, which are formed higher than the output electrode bus bars 51, 52, and 53, are an example of a "substrate support portion."

The input electrode 421 is erected so as to protrude upward from the end of the extension 423 in the +Z direction. The connection portion 425 includes a thin portion 426A and a base portion 426B. The base portion 426B is disposed on the extension 423 side of the connection portion 425. The thin portion 426A is disposed on the extension 424 side of the connection portion 425. The thin portion 426A is formed to be thinner in the Y direction than the base portion 426B. As can be seen from FIG. 7B, the extensions 423 and 424 are formed in a trapezoidal shape when viewed in the Z direction, and the width W1 of the upper base is larger than the width W2 of the lower base. The width W1 of the upper base is determined so that the distance between the screw hole 428 and the ends 423A and 424A of the extensions 423 and 424 is a predetermined distance that ensures the rigidity of the input electrode busbar 42. That is, the opening of the screw hole 428 on the surface (top surface) opposite to the surface (bottom surface) of the input electrode bus bar 42 facing the power board 4 is formed smaller than the width W1 of the upper bottom. Also, the opening of the screw hole 428 on the surface of the input electrode bus bar 42 facing the power board 4 is formed smaller than the width W2 of the lower bottom. As can be understood by referring to FIG. 5, the connection portion 425 is disposed in an area of the power board 4 where the power element 40 is not disposed (an area different from the power element 40). In other words, the connection portion 425 is disposed in an area of the power board 4 where the power element 40 does not overlap with the power element 40 in the Y direction. The input electrode bus bars 41 and 42 are examples of "input electrode bus bars". The extension portions 413, 414, 423, and 424 are examples of "conductor plates". The connection portions 415 and 425 are examples of "connection conductor plates". The thin-walled portions 416A and 426A are examples of "first portions". Base portions 416B and 426B are examples of the "second portion."

8A and 8B are diagrams illustrating the arrangement of input electrodes 411, 421 in inverter circuit 200. Input electrodes 411, 421 are arranged so that extensions 413, 414, 423, 434 are parallel to each other. Here, input electrodes 411, 421 are arranged so that thin-walled portions 416A, 426A are stacked vertically. Between thin-walled portions 416A and 426A, a gap C2 is formed that ensures an insulating distance. Therefore, input electrodes 411, 421 are insulated from each other even when thin-walled portions 416A, 426A are stacked vertically. As a result of this arrangement, extension 424 is arranged between extensions 413 and 414, and extension 414 is arranged between extensions 423 and 424. That is, the extensions 413, 414 of the input electrode bus bar 41 and the extensions 423, 424 of the input electrode bus bar 42 are arranged alternately.

Returning to FIG. 5, the output electrode busbars 51, 52, and 53 are plate-shaped members extending in the Z direction parallel to the extension 413. The output electrode busbars 51, 52, and 53 are formed of a conductor such as metal. The output electrode busbar 51 is disposed between the extensions 413 and 424. An output electrode 511 is erected at the end of the output electrode busbar 51 in the -Z direction so as to protrude upward. The output electrode busbar 52 is disposed between the extensions 424 and 414. An output electrode 521 is erected at the end of the output electrode busbar 52 in the -Z direction so as to protrude upward. The output electrode busbar 53 is disposed between the extensions 414 and 423. An output electrode 531 is erected at the end of the output electrode busbar 53 in the -Z direction so as to protrude upward.

In the power board 4, the electrode groups D1, D2, D3, D4, D5, and D6, in which the power elements 40 are arranged in a row in the Z direction, are arranged so as to be parallel to each other. The electrode groups D1, D2, D3, D4, D5, and D6 are used as switching elements for the upper and lower arms of each phase of the three-phase AC output by the inverter device 100. The electrode group D1 is arranged between the extension 413 and the output electrode bus bar 51. The power elements 40 belonging to the electrode group D1 are electrically connected to the extension 413 and the output electrode bus bar 51. It can be said that the extension 413 is arranged adjacent to the electrode group D1. The electrode group D2 is arranged between the output electrode bus bar 51 and the extension 424. The power elements 40 belonging to the electrode group D2 are electrically connected to the output electrode bus bar 51 and the extension 424. It can be said that the extension 424 is arranged adjacent to the electrode group D2. The electrode group D3 is disposed between the extension 424 and the output electrode bus bar 52. The power elements 40 belonging to the electrode group D3 are electrically connected to the extension 424 and the output electrode bus bar 52. It can be said that the extension 424 is disposed adjacent to the electrode group D3. The electrode group D4 is disposed between the output electrode bus bar 52 and the extension 414. The power elements 40 belonging to the electrode group D4 are electrically connected to the output electrode bus bar 52 and the extension 414. It can be said that the extension 414 is disposed adjacent to the electrode group D4. The electrode group D5 is disposed between the extension 414 and the output electrode bus bar 53. The power elements 40 belonging to the electrode group D5 are electrically connected to the extension 414 and the output electrode bus bar 53. It can be said that the extension 414 is disposed adjacent to the electrode group D5. The electrode group D6 is disposed between the output electrode bus bar 53 and the extension 423. The power elements 40 belonging to electrode group D6 are electrically connected to the output electrode bus bar 53 and the extension portion 423. The extension portion 423 can be said to be disposed adjacent to electrode group D6.

In other words, output electrode busbar 51 including output electrode 531 that outputs the U phase is arranged sandwiched between electrode group D1 that forms the upper arm of the U phase and electrode group D2 that forms the lower arm of the U phase. Output electrode busbar 52 including output electrode 521 that outputs the V phase is arranged sandwiched between electrode group D4 that forms the upper arm of the V phase and electrode group D3 that forms the lower arm of the V phase. Output electrode busbar 53 including output electrode 531 that outputs the W layer is arranged sandwiched between electrode group D5 that forms the upper arm of the W layer and electrode group D6 that forms the lower arm of the W layer.

9 is a diagram showing the flow of current input from the input electrode 411. In FIG. 9, the flow of current input from the input electrode 411 to the output electrode 531 is shown by arrows A1, A2, and A3. The current input from the input electrode 411 is input to each of the power elements 40, 40, and 40 via the connection portion 415 and the extension portion 414. The current input to each of the power elements 40, 40, and 40 flows into the output electrode bus bar 51. The current that flows into the output electrode bus bar 51 is output from the output electrode 531. In this embodiment, the input electrode 411 and the output electrode 531 are arranged opposite to each other on the power board 4, so that the distance of the current path between the input electrode 411 and the output electrode 531 passing through the power elements 40, 40, and 40 is averaged. Therefore, the current flowing through the power elements 40, 40, and 40 is also averaged, which in turn improves the reliability of the power elements 40, 40, and 40. Note that in FIG. 9, the current path that is input from the input electrode 411 and flows to the output electrode 531 is described, but the same applies to the current paths for other combinations of input electrodes and output electrodes.

10 is a diagram showing a schematic arrangement of the extension 413, the output electrode busbar 51, and the power element 40 in the embodiment. FIG. 10 illustrates the arrangement of the extension 413, the output electrode busbar 51, and the power element 40 as viewed from the side. FIG. 10 also illustrates by dotted lines the screw hole 418 formed in the extension 413 of the input electrode busbar 41, the screw 92 inserted into the screw hole, and the insulating washer 93. The screw hole 418 is formed with a wider diameter at the top, and receives the screw head of the screw 92. The screw hole 418 is also formed with a narrower diameter at the bottom, and the threaded portion of the screw 92 is inserted into it. That is, the screw hole 418 is formed in a staircase shape when viewed in the Z direction. The insulating washer 93 is a washer formed of an insulator. The screw 92 is inserted into the screw hole 418 while being inserted into the insulating washer 93. That is, an insulating washer 93 is placed between the screw 92 and the screw hole 418, and the screw 92 and the screw hole 418 do not come into contact with each other. Therefore, the screw 92 and the screw hole 418 are insulated from each other. The screw 92 penetrates the power board 4 in the thickness direction and reaches the heat sink 12, fixing the power board 4 and the heat sink 12 together. The screw hole 418 is an example of a "step-shaped through hole."

In the example of FIG. 10, the output electrode busbar 51 is also formed in a trapezoidal shape when viewed in the Z direction, similar to the extension portion 413, and the width W3 of the upper base is larger than the width W4 of the lower base. In addition, the height H2 of the output electrode busbar 51 is larger than the height H1 of the power element 40.

By forming the extension 413 and the output electrode busbar 51 in this manner, the power element 40 can be arranged so as to slip under the -X direction end 413A of the extension 413, and can also be arranged so as to slip under the +X direction end 51A of the output electrode busbar 51. In other words, the power element 40 is arranged so that a partial area of the power element 40 overlaps with the extension 413 and the output electrode busbar 51 when viewed in the Y direction. As a result, the mounting density of the extension 413, power element 40, and output electrode busbar 51 can be increased.

When manufacturing the inverter device 100, the input electrode bus bars 41, 42 and the power board 4 are fixed together with the screws 92 inserted into the screw holes 418, 428, and then the positive terminal of the power supply is connected to the input terminal 412 and the negative terminal of the power supply is connected to the input terminal 422.

<Effects of the embodiment>
In this embodiment, the input electrode bus bars 41, 42 arranged on the power board 4 have extensions 413, 414 and extensions 423, 424 that are parallel to each other. The extension 424 is arranged between the extensions 413 and 414, and the extension 414 is arranged between the extensions 423 and 424. The input electrode bus bars 41, 42 are arranged so that the thin portions 416A, 426A of the connection portions 415, 425 overlap each other. By arranging the input electrode bus bars 41, 42 in this manner, for example, even to the power element 40 arranged near the center of the power board 4, power can be supplied from the input electrodes 411, 421 via the connection portions 415, 425 and the extensions 414, 424 without the need to use copper foil to pass through another board such as the capacitor board 3. According to the present embodiment, the power supply path to the power element 40 can be formed by the power board 4, and power can be supplied through a conductive path with low electrical resistance. Therefore, the influence of heat on the capacitor board 3 and the capacitor 30 can be suppressed compared to the case where power is supplied to the power element 40 via the capacitor board 3 using copper foil.

In this embodiment, the thin-walled portions 416A, 426A that are stacked in the Y direction are formed thinner than the base portions 416B, 426B. Therefore, according to this embodiment, the increase in the height direction (Y direction) of the inverter device 100 can be suppressed. In addition, in this embodiment, a gap C2 is formed between the thin-walled portions 416A, 426A, so that the input electrode bus bars 41, 42 can be insulated from each other without using an insulating spacer or the like.

In this embodiment, a plurality of power elements 40 are arranged between the extensions 413, 423, 414, 424 in parallel with the extensions 413, 423, 414, 424, and the output electrode bus bars 51, 52, 53 are arranged in parallel with the extensions 413, 423, 414, 424. The input electrodes 411, 421 and the output electrodes 511, 521, 531 are arranged to sandwich the power elements 40 in the direction in which the power elements 40 are arranged. By arranging the input electrodes 411, 421 and the output electrodes 511, 521, 531 in this manner, the distance of the current path between the input electrodes 411, 421 and the output electrodes 511, 521, 531 via each power element 40 is averaged. As a result, the current flowing through each power element 40 is also averaged, which in turn improves the reliability of the power elements 40.

In this embodiment, the connection parts 415, 425 of the input electrode bus bars 41, 42 are arranged in an area of the power board 4 that is different from the area in which the power elements 40 are arranged. By arranging the connection parts 415, 425 in this manner, it is possible to suppress an increase in the height direction (Y direction) of the inverter device 100.

In this embodiment, the capacitor substrate 3 is supported by the extensions 413, 414, 423, and 424 of the input electrodes 411 and 421 so that a gap C1 is formed between the output electrode bus bars 51, 52, and 53 and the capacitor substrate 3. By forming the gap C1, the capacitor substrate 3 and the output electrode bus bars 51, 52, and 53 can be insulated from each other without using an insulating spacer or the like.

In this embodiment, the width W1 of the upper base of the input electrode busbars 41, 42 is made larger than the width W2 of the lower base. In other words, the width W2 of the lower base of the input electrode busbars 41, 42 is made narrower than the width W1 of the upper base. Therefore, the area in which the power elements 40 are mounted between the extensions 413, 423, 414, 424 can be expanded as much as possible, and thus the mounting density of the power elements 40 can be increased as much as possible.

In this embodiment, the power element 40 is arranged so that a portion of the power element 40 overlaps with the extension portion 413 when viewed in the Y direction. As a result, this embodiment makes it possible to increase the mounting density of the power element 40.

In this embodiment, the width W1 of the upper base is determined so that the distance between the screw hole 418 and the ends 413A, 414A of the extensions 413, 414 is a predetermined distance that ensures the rigidity of the input electrode bus bar 41. Therefore, even if torque is generated by turning the screw 92 inserted into the screw hole 418, the rigidity against the torque can be ensured.

In this embodiment, the screw 92 is inserted into the screw hole 418 while being inserted into the insulating washer 93. In other words, the insulating washer 93 is disposed between the screw 92 and the screw hole 418, and the screw 92 and the screw hole 418 do not come into contact with each other. Therefore, according to this embodiment, the screw 92 and the screw hole 418 can be insulated from each other.

In this embodiment, screw holes 419, 429 for fixing the capacitor board 3 to the input electrode bus bars 41, 42 are formed in the extensions 413, 423. Therefore, according to this embodiment, the capacitor board 3 can be easily fixed to the power board 4.

<Modification>
In the embodiment, the extensions 413, 414, 423, and 424 of the input electrode bus bars 41 and 42 are formed in a trapezoidal shape when viewed in the Z direction, but the extensions 413, 414, 423, and 424 may be formed in a shape other than a trapezoid. FIG. 11 is a diagram illustrating a variation in the shape of the extension 413 when viewed in the Z direction. In FIG. 11A, a step portion 4132 is provided above a base portion 4131 formed in a trapezoidal shape. The step portion 4132 is formed so that the extension 413 gradually expands in diameter toward the +Y direction. In FIG. 11B, an inclined surface 4133 is formed on the surface of the extension 413 facing the power element 40. The inclined surface 4133 is formed so that the extension 413 gradually expands in diameter toward the +Y direction. The extension 413 illustrated in FIG. 11A and FIG. 11B can also increase the mounting density of the power element 40 while ensuring the strength around the screw hole 428. The same is true for extensions 414, 423, and 424.

In the embodiment described above, electronic components such as the capacitor 30 and power element 40 are mounted on each of the control board 2, the capacitor board 3, and the power board 4. However, the inverter device 100 is not limited to this configuration. For example, the inverter device 100 may consolidate the boards that the inverter device 100 has into a single board by mounting the electronic components mounted on the control board 2 and the capacitor board 3 on the power board 4.

In addition, in the above-described embodiment and modified example, the extensions 413, 414, 423, 424 are formed so that the width W1 of the upper base is larger than the width W2 of the lower base, but the entire input electrode busbars 41, 42 may be formed so that the width W1 of the upper base is larger than the width W2 of the lower base in a cross-sectional view.

As an appendix, the features of the present invention are as follows:
(Appendix 1)
A substrate on which a plurality of electronic components are mounted in a row;
a first electrode bus bar and a second electrode bus bar provided in sequence and spaced apart on the substrate;
The first electrode bus bar and the second electrode bus bar each have
Two conductor plates parallel to each other, and a connecting conductor plate electrically connecting the two conductor plates;
an input electrode for supplying power to the two conductor plates;
each of the conductor plates is disposed adjacent to the electronic component and electrically connected to the electronic component;
the connection conductor plate of the first electrode bus bar is arranged to overlap with the connection conductor plate of the second electrode bus bar.
(Appendix 2)
the first portion of the connection conductor plate arranged to overlap the first portion is formed thinner than a second portion of the connection conductor plate other than the first portion;
2. The electronic device of claim 1.
(Appendix 3)
a gap is formed between the first portion of one of the first electrode bus bar and the second electrode bus bar and the first portion of the other of the first electrode bus bar and the second electrode bus bar.
3. The electronic device according to claim 2.
(Appendix 4)
the first electrode bus bar and the second electrode bus bar are input electrode bus bars,
an output electrode bus bar including an output electrode is disposed between the conductor plates in parallel with the conductor plates;
a plurality of power elements are arranged between the conductor plate and the output electrode bus bar in parallel with the conductor plate;
the input electrode and the output electrode are arranged to sandwich the power element in the direction in which the power elements are arranged.
2. The electronic device of claim 1.
(Appendix 5)
the connection conductor plate is disposed in a region of the substrate different from a region in which the power element is disposed.
5. The electronic device according to claim 4.
(Appendix 6)
The power element is
disposed between adjacent ones of the input electrode bus bar and the output electrode bus bar;
5. The electronic device according to claim 4.
(Appendix 7)
an upper substrate disposed on the surface of the substrate on which the output electrodes are disposed;
a substrate support portion for supporting the upper substrate at a height that forms a gap between the upper substrate and the output electrode bus bar is formed in the input electrode.
6. The electronic device according to claim 4 or 5.
(Appendix 8)
the input electrode bus bar is formed so that a width of a first surface in contact with the substrate is narrower than a width of a second surface opposite to the first surface;
8. An electronic device according to any one of claims 1 to 7.
(Appendix 9)
The electronic device is an inverter.
2. The electronic device of claim 1.
(Appendix 10)
A substrate on which a plurality of electronic components are mounted in a row;
a first input electrode bus bar and a second input electrode bus bar provided in sequence and spaced apart from each other on the substrate;
The first input electrode bus bar and the second input electrode bus bar each have
Two conductor plates parallel to each other, and a connecting conductor plate electrically connecting the two conductor plates;
an input electrode for supplying power to the two conductor plates;
the conductor plates are disposed adjacent to the electronic components and electrically connected to the electronic components,
the connection conductor plate of the first input electrode bus bar is arranged to overlap the connection conductor plate of the second input electrode bus bar,
the two conductor plates of the first input electrode bus bar and the two conductor plates of the second input electrode bus bar are arranged alternately in parallel,
an output electrode bus bar including an output electrode is disposed between each of the conductive plates arranged alternately in parallel with the conductive plates;
a plurality of power elements are arranged parallel to the conductor plate between each of the conductor plates and the output electrode bus bars;
the input electrode and the output electrode are arranged to sandwich the power element in the direction in which the power elements are arranged,
a first input electrode of the first input electrode bus bar connected to a positive electrode of a power source;
a second input electrode of the second input electrode bus bar connected to a negative electrode of the power source;
The output electrode bus bar is
a first output electrode bus bar including a first output electrode that outputs U-phase AC power of the three-phase AC power;
a second output electrode bus bar including a second output electrode that outputs V-phase AC power of the three-phase AC power;
a third output electrode bus bar including a third output electrode that outputs a W-phase AC power of the three-phase AC power,
Inverter device.

DESCRIPTION OF SYMBOLS 2: Control board 3: Capacitor board 4: Power board 11: Housing 12: Heat sink 13: Cover 14: Breathing valve 15: Connection terminal 30: Capacitor 31: Recess 32: Recess 33: Recess 35: Recess 36: Recess 40: Power element 41: Input electrode bus bar 42: Input electrode bus bar 51: Output electrode bus bar 52: Output electrode bus bar 53: Output electrode bus bar 111: Claw portion 112: Claw portion 113: Claw portion 131: Through hole 132: Through hole 133: Through hole 134: Through hole 135: Through hole 136: Claw portion 137: Claw portion 138: Claw portion 100: Inverter device 200: Inverter circuit 411: Input electrode 412: Input terminal 413: Extension portion 414: Extension portion 415: Connection portion 416A: Thin portion 416B: Base portion 417: Reinforcement portion 421: Input electrode 422: Input terminal 423: Extension portion 424: Extension portion 425: Connection portion 426A: Thin portion 426B: Base portion 427: Reinforcement portion 511: Output electrode 512: Output terminal 521: Output electrode 522: Output terminal 531: Output electrode 532: Output terminal 91: Screw 92: Screw 93: Insulating washer D1: Electrode group D2: Electrode group D3: Electrode group D4: Electrode group D5: Electrode group D6: Electrode group

Claims (10)

A substrate on which a plurality of electronic components are mounted in a row;
a first electrode bus bar and a second electrode bus bar provided in sequence and spaced apart on the substrate;
The first electrode bus bar and the second electrode bus bar each have
Two conductor plates parallel to each other, and a connecting conductor plate electrically connecting the two conductor plates;
an input electrode for supplying power to the two conductor plates;
the conductor plates are disposed adjacent to the electronic components and electrically connected to the electronic components,
the connection conductor plate of the first electrode bus bar is arranged to overlap with the connection conductor plate of the second electrode bus bar. the first portion of the connection conductor plate arranged to overlap the first portion is formed thinner than a second portion of the connection conductor plate other than the first portion;
2. The electronic device according to claim 1. a gap is formed between the first portion of one of the first electrode bus bar and the second electrode bus bar and the first portion of the other of the first electrode bus bar and the second electrode bus bar.
3. The electronic device according to claim 2. the first electrode bus bar and the second electrode bus bar are input electrode bus bars,
an output electrode bus bar including an output electrode is disposed between the conductor plates in parallel with the conductor plates;
a plurality of power elements are arranged between the conductor plate and the output electrode bus bar in parallel with the conductor plate;
the input electrode and the output electrode are arranged to sandwich the power element in the direction in which the power elements are arranged.
2. The electronic device according to claim 1. the connection conductor plate is disposed in a region of the substrate different from a region in which the power element is disposed.
5. The electronic device according to claim 4. The power element is
disposed between adjacent ones of the input electrode bus bar and the output electrode bus bar;
5. The electronic device according to claim 4. an upper substrate disposed on the surface of the substrate on which the output electrodes are disposed;
a substrate support portion for supporting the upper substrate at a height that forms a gap between the upper substrate and the output electrode bus bar is formed in the input electrode.
6. The electronic device according to claim 4 or 5. the input electrode bus bar is formed so that a width of a first surface in contact with the substrate is narrower than a width of a second surface opposite to the first surface;
The electronic device according to claim 1 . The electronic device is an inverter.
2. The electronic device according to claim 1. A substrate on which a plurality of electronic components are mounted in a row;
a first input electrode bus bar and a second input electrode bus bar provided in sequence and spaced apart from each other on the substrate;
The first input electrode bus bar and the second input electrode bus bar each have
Two conductor plates parallel to each other, and a connecting conductor plate electrically connecting the two conductor plates;
an input electrode for supplying power to the two conductor plates;
the conductor plates are disposed adjacent to the electronic components and electrically connected to the electronic components,
the connection conductor plate of the first input electrode bus bar is arranged to overlap the connection conductor plate of the second input electrode bus bar,
the two conductor plates of the first input electrode bus bar and the two conductor plates of the second input electrode bus bar are arranged alternately in parallel,
an output electrode bus bar including an output electrode is disposed in parallel with the conductor plates between the conductor plates that are alternately arranged,
a plurality of power elements are arranged parallel to the conductor plate between each of the conductor plates and the output electrode bus bars;
the input electrode and the output electrode are arranged to sandwich the power element in the direction in which the power elements are arranged,
a first input electrode of the first input electrode bus bar connected to a positive electrode of a power source;
a second input electrode of the second input electrode bus bar connected to a negative electrode of the power source;
The output electrode bus bar is
a first output electrode bus bar including a first output electrode that outputs U-phase AC power of the three-phase AC power;
a second output electrode bus bar including a second output electrode that outputs V-phase AC power of the three-phase AC power;
a third output electrode bus bar including a third output electrode that outputs a W-phase AC power of the three-phase AC power,
Inverter device.

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