JP7183363B1 - power converter - Google Patents

Abstract

An object of the present invention is to obtain a power conversion device having a compact, low-cost cooling structure while maintaining the function of dissipating heat generated in a bus bar. A plurality of bus bars and a first fastening member that fastens a connection portion where at least two bus bars are overlapped and electrically connected to each other, is thermally connected to the connection portion, and has thermal conductivity. , a cooler having a cooling surface facing a plurality of busbars, and an insulating member provided between the cooling surface and the busbars and having thermal conductivity and electrical insulation, the first fastening member comprising: It has a first extension extending in the direction of the cooler from the connecting portion and thermally connected to the cooling surface via an insulating member. [Selection drawing] Fig. 2

Description

The present application relates to a power converter.

2. Description of the Related Art An electric vehicle that uses a motor as a drive source, such as a hybrid vehicle or an electric vehicle, is equipped with a plurality of power converters. A power converter is a device that converts an input current from DC to AC, AC to DC, or an input voltage to a different voltage. As a power converter installed in an electric vehicle, specifically, a charger that converts commercial AC power into DC power and charges the high-voltage battery, and a charger that converts the DC power of the high-voltage battery into DC power of a different voltage. Examples include a DC/DC converter, an inverter that converts DC power from a high-voltage battery into AC power for a motor, and the like.

The DC/DC converter includes, for example, a transformer having a primary coil and a secondary coil, an electronic component that rectifies the voltage induced in the secondary coil of the transformer, and a choke connected to the secondary coil of the transformer. Equipped with a coil. 2. Description of the Related Art In vehicle-mounted devices, which are becoming increasingly electrified, the number of power converters is increasing and the power of the power converters is increasing. 2. Description of the Related Art In order to efficiently transmit electric power converted by a coil or the like, means for connecting components with a bus bar has come to be often used in a power conversion apparatus for increasing power.

For the purpose of increasing the space inside the vehicle, improving fuel and electricity consumption, and reducing costs, there is a demand for miniaturization of the power converters and the parts mounted on the power converters used in the above-described electric vehicles. Among the components mounted on the power conversion device, for example, coils and busbars, when miniaturized, have increased loss and increased loss density, resulting in higher temperatures. Therefore, a cooling structure is provided to actively cool the coils and busbars to lower their temperatures, thereby realizing downsizing of the coils and busbars.

As a specific cooling structure, a cooling structure is disclosed in which a part of the busbar is enlarged for cooling and connected to the cooler via an insulating sheet or the like, so that the heat of the busbar is dissipated to the cooler ( For example, see Patent Document 1).

JP 2020-22239 A

In Patent Document 1, the enlarged portion of the busbar is thermally connected to the cooler, so that the heat of the busbar can be radiated to the cooler. However, since it is a cooling structure in which a part of the busbar is enlarged and the enlarged part is used to dissipate the heat of the busbar to the cooler, there is a problem that the busbar is enlarged. In addition, there is a problem that the cost of the busbar is increased because the busbar is enlarged.

SUMMARY OF THE INVENTION Accordingly, an object of the present application is to obtain a power conversion apparatus having a compact, low-cost cooling structure while maintaining the function of dissipating heat generated by the busbar.

The power conversion device disclosed in the present application fastens a plurality of bus bars and a connection portion in which at least two bus bars are overlapped and electrically connected to each other, is thermally connected to the connection portion, and has thermal conductivity. a first fastening member, a cooler having a cooling surface facing the plurality of busbars, and an insulating member provided between the cooling surface and the busbars and having thermal conductivity and electrical insulation; The one fastening member has a first extension part that extends in the direction of the cooler from the connection part and is thermally connected to the cooling surface via the insulating member , and has a non-connection other than the connection part of the bus bar. The portion has a projecting portion that is bent toward the cooler from a portion spaced from the cooler, and the projecting portion is thermally connected to the cooling surface via an insulating member.

According to the power conversion device disclosed in the present application, a plurality of bus bars and at least two bus bars overlap and fasten the electrically connected connecting portions and are thermally connected to the connecting portions to improve thermal conductivity. a cooler having a cooling surface facing a plurality of busbars; and an insulating member provided between the cooling surface and the busbars and having thermal conductivity and electrical insulation. , the first fastening member has a first extension part that extends in the direction of the cooler from the connecting part and is thermally connected to the cooling surface via the insulating member. Since the outlet portion is thermally connected to the cooling surface via the insulating member, the heat generated by the plurality of bus bars can be cooled while ensuring insulation between the plurality of bus bars fastened by the first fastening member and the cooler. heat can be dissipated into the vessel. In addition, since the end portions of the plurality of busbars fastened by the first fastening member have the same width as the other portions of the busbars, there is no need to increase the width of the busbars at the connecting portions, so that the heat generated in the busbars can be dissipated. It is possible to obtain a small-sized power converter having a low-cost cooling structure while maintaining the function of dissipating heat.

1 is a schematic perspective view of a power converter according to Embodiment 1; FIG. FIG. 2 is a cross-sectional view schematically showing the power conversion device taken along line AA in FIG. 1; 1 is a schematic perspective view of a main part of a power converter according to Embodiment 1; FIG. FIG. 4 is a cross-sectional view schematically showing a main part of another power conversion device according to Embodiment 1; FIG. 4 is a cross-sectional view schematically showing a main part of another power conversion device according to Embodiment 1; FIG. 4 is a cross-sectional view schematically showing a main part of another power conversion device according to Embodiment 1; FIG. 4 is a cross-sectional view showing a main part of another power conversion device according to Embodiment 1; FIG. 10 is a cross-sectional view showing an outline of a main part of a power conversion device according to Embodiment 2; FIG. 11 is a cross-sectional view schematically showing a main part of another power conversion device according to Embodiment 2; FIG. 11 is a cross-sectional view schematically showing a main part of another power conversion device according to Embodiment 2; FIG. 7 is a cross-sectional view showing an outline of a power conversion device according to Embodiment 3; FIG. 11 is a diagram showing an outline of a circuit of a power conversion device according to Embodiment 4; FIG. 11 is a perspective view showing an outline of a main part of a power conversion device according to Embodiment 4; FIG. 11 is a perspective view showing an outline of a main part of a power conversion device according to Embodiment 4; FIG. 11 is a perspective view schematically showing a magnetic core of another power conversion device according to Embodiment 4;

Power converters according to embodiments of the present application will be described below with reference to the drawings. In each figure, the same or corresponding members and parts are denoted by the same reference numerals.

Embodiment 1.
FIG. 1 is a perspective view showing an outline of a power conversion device 1 according to Embodiment 1, and is a portion for connecting electrical components provided in the power conversion device 1 . 2 is a cross-sectional view showing an outline of the power conversion device 1 cut at the cross-sectional position of AA in FIG. 1, and FIG. It is the figure which abbreviate|omitted and showed the container 5. FIG. The power converter 1 is a device that converts an input current from DC to AC, vice versa, or converts an input voltage to a different voltage.

<Power converter 1>
The power converter 1 includes a plurality of busbars, first fastening members 21 , second fastening members 22 , fixing members 23 , insulating members 4 , coolers 5 , and electronic components 7 . The power conversion device 1 includes a resin member 6 in which one or more of a plurality of busbars, first fastening members 21 and second fastening members 22 are integrally molded. In this embodiment, the power conversion device 1 includes bus bars 11 and 12 as the plurality of bus bars. Further, in the present embodiment, the bus bar 12, the first fastening member 21, the second fastening member 22, and the fastening portions 21a, 22a, 23a of the fixing member 23 are integrally molded with the resin member 6. As shown in FIG. The positions of the bus bar 12 , the first fastening member 21 , the second fastening member 22 , and the fixing member 23 are determined by being integrally molded with the resin member 6 . Further, the positions of the busbars 11 connected to the busbars 12 and the positions of the electronic components 7 connected to the busbars 11 are determined.

A heat radiation path by the first fastening member 21 will be described. As shown in FIG. 2 , the first fastening member 21 fastens a connection portion 30 where the ends of the busbars 11 and 12 are electrically connected to each other and is thermally connected to the connection portion 30 . The first fastening member 21 has thermal conductivity. At least two busbars are required. The number of busbars is not limited to two, and the first fastening member 21 may be used to fasten the portions where three busbars overlap each other and are electrically connected. The width of the ends of busbars 11 and 12 fastened by first fastening member 21 is the same as the width of other portions of busbars 11 and 12 . Cooler 5 has a cooling surface 5 a facing bus bars 11 and 12 . In FIG. 2, the direction perpendicular to the cooling surface 5a is the Z direction, and the direction in which the cooling surface 5a is formed is the XY direction. The insulating member 4 is provided between the cooling surface 5a and the busbars 11 and 12, and has thermal conductivity and electrical insulation. The first fastening member 21 has a first extending portion 21a1 that extends in the direction of the cooler 5 from the connection portion 30 and is thermally connected to the cooling surface 5a via the insulating member 4. .

With this configuration, the first extending portion 21a1 of the first fastening member 21 that fastens the busbars 11 and 12 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4. Therefore, heat generated by the busbars 11 and 12 can be radiated to the cooler 5 while ensuring insulation between the busbars 11 and 12 and the cooler 5 . Since the ends of the busbars 11 and 12 fastened by the first fastening member 21 have the same width as the other portions of the busbars 11 and 12, there is no need to increase the width of the busbars 11 and 12 at the connection portion 30. , while maintaining the function of dissipating heat generated in the bus bars 11 and 12, it is possible to obtain the power converter 1 having a small and low-cost cooling structure.

Details of each part will be described. The busbars 11 and 12 are made of, for example, copper or aluminum with high electrical conductivity. The busbars 11 and 12 are made of sheet metal by punching out a flat metal plate having a certain thickness using a press die or the like. The bus bar 12 is manufactured by further bending a sheet metal. The method of manufacturing the busbars 11 and 12 is not limited to punching with a press die, and the busbars 11 and 12 may be manufactured by subjecting a metal flat plate to laser processing, etching, or the like. Busbars 11 and 12 can be easily manufactured by using these manufacturing methods.

The first fastening member 21 is composed of a fastening portion 21a having a screw hole and a screw 21b. A portion of the fastening portion 21a on the side of the cooling surface 5a is the first extending portion 21a1. The second fastening member 22 is composed of a fastening portion 22a having a screw hole and a screw 22b. The fixing member 23 is composed of a cylindrical fastening portion 23a integrally formed with the resin member 6 and a screw 23b. A screw hole 5 b is formed in the cooler 5 , and the resin member 6 is fixed to the cooling surface 5 a by a fixing member 23 . The first fastening member 21, the second fastening member 22, and the fixing member 23 are made of metal such as iron or stainless steel, for example.

The resin member 6 is made of a resin material having excellent insulating properties such as PBT (polybutylene terephthalate), for example, by injection molding. By injection molding the resin member 6, the bus bar 12, the first fastening member 21, the second fastening member 22, and the fastening portions 21a, 22a, and 23a of the fixing member 23 are easily integrated. By fixing the integrated molded product to the cooler 5 , the bus bar 12 and the fastening portions 21 a , 22 a and 23 a can be easily fixed to the cooler 5 . Fixing the molded product to the cooler 5 simplifies the manufacturing process of fixing a plurality of members such as the busbar 12 to the cooler 5 , so that the productivity of the power converter 1 can be improved. Since the productivity of the power conversion device 1 is improved, the manufacturing cost of the power conversion device 1 can be reduced.

The cooler 5 is made by die casting, for example, from aluminum. Fins may be provided on the surface of the cooler 5 opposite to the cooling surface 5a. Alternatively, a channel through which the coolant flows may be provided. The cooling surface 5a has at least two recesses 5c, and the resin member 6 has at least two protrusions 6a. In this embodiment, the cooling surface 5a has two recesses 5c, and the resin member 6 has two protrusions 6a. The two recesses 5c of the cooling surface 5a and the two projections 6a of the resin member 6 are fitted to each other to position the cooler 5 and the resin member 6 in the XY directions. The configuration for positioning the cooler 5 and the resin member 6 is not limited to this, and the configuration shown in FIG. 7 may be used. FIG. 7 is a cross-sectional view showing a main part of another power conversion device 1 according to Embodiment 1. As shown in FIG. The cooling surface 5a has two protrusions 5d, and the resin member 6 has two recesses 6b. FIG. 7 shows only one protrusion 5d and one recess 6b that fits into it. The two projections 5d of the cooling surface 5a and the two recesses 6b of the resin member 6 are fitted to each other to position the cooler 5 and the resin member 6 in the XY directions. By configuring in this way, it is possible to easily position the cooler 5 and the resin member 6 in the XY directions. Since the positioning can be easily performed, the process of assembling the resin member 6 to the cooler 5 is facilitated, and the productivity of the power converter 1 can be improved.

The insulating member 4 is made of a heat-dissipating sheet or the like having excellent thermal conductivity and electrical insulation. The insulating member 4 has a function of radiating heat from the busbars 11 and 12 to the cooler 5 while ensuring insulation between the busbars 11 and 12 and the cooler 5 . The insulating member 4 may be made of a material, such as silicone rubber, which is deformable in the thickness direction. If the insulating member 4 is deformable in the thickness direction, the deformation of the insulating member 4 can absorb variations in dimensional tolerance of the first fastening member 21 and the second fastening member 22 in the Z direction. Further, when the insulating member 4 is deformable in the thickness direction, when molding a molded product in which the bus bar 12, the first fastening member 21, the second fastening member 22, and a part of the fixing member 23 are integrated, The variation in dimensional tolerance in the Z direction that occurs can be absorbed by the deformation of the insulating member 4 .

When the resin member 6 integrally molds at least the first fastening member 21 and the second fastening member 22, as shown in FIG. may project from the resin member 6 to the cooler 5 side and be thermally connected to the cooling surface 5a via the insulating member 4 . By configuring in this way, it is possible to reliably thermally connect the first fastening member 21 and the second fastening member 22 to the cooling surface 5a. Since the first fastening member 21 and the second fastening member 22 and the cooling surface 5 a can be reliably thermally connected, the heat generated by the bus bars 11 and 12 can be reliably radiated to the cooler 5 . In addition, the first fastening member 21 and the second fastening member 22 that are integrally molded are not limited to the configuration in which the first fastening member 21 and the second fastening member 22 protrude from the resin member 6 toward the cooler 5 side. The surfaces of the member 22 and the resin member 6 on the side of the cooler 5 may have the same height in the Z direction. Even if the surface of the first fastening member 21, the second fastening member 22, and the surface of the resin member 6 on the side of the cooler 5 are at the same height, the integrated molded product does not press the insulating member 4. Since the first and second fastening members 21 and 22 can be thermally connected to the cooling surface 5a.

<Second fastening member 22>
The power conversion device 1 according to the present embodiment includes a heat radiation path by the second fastening member 22 in addition to the heat radiation path by the first fastening member 21 . The power converter 1 includes electronic components 7 and second fastening members 22 that thermally or electrically connect the electronic components 7 to non-connecting portions other than the connecting portions 30 of the busbars 11 . The second fastening member 22 has thermal conductivity. In this embodiment, the electronic component 7 is, for example, a temperature sensor. A temperature sensor is thermally connected to the busbar 11 . The temperature sensor measures the temperature of busbar 11 during operation of power converter 1 . The electronic component 7 is not limited to a temperature sensor, and may be a component electrically connected to the bus bar 11 such as a diode. The second fastening member 22 extends in the direction of the cooler 5 from the non-connected portion to which the second fastening member 22 is connected, and is thermally connected to the cooling surface 5a via the insulating member 4. It has a second extending portion 22a1. The width of the portion of the busbar 11 that thermally or electrically connects the electronic component 7 with the second fastening member 22 is the same as the width of the other portion of the busbar 11 . When the fastening portion 22 a of the second fastening member 22 is integrated with the resin member 6 as in the present embodiment, the bus bar 11 is fixed to the resin member 6 with the second fastening member 22 .

With this configuration, the second extending portion 22a1 of the second fastening member 22 connecting the electronic component 7 to the busbar 11 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4. Therefore, heat generated by the busbar 11 can be radiated to the cooler 5 while ensuring insulation between the busbar 11 and the cooler 5 . Since the width of the portion of the busbar 11 to which the electronic component 7 is connected by the second fastening member 22 is the same as the width of the other portion of the busbar 11, there is no need to increase the width of the busbar 11. It is possible to obtain the power conversion device 1 having a compact and low-cost cooling structure while maintaining the function of radiating the heat. By providing a heat dissipation path by the second fastening member 22 on the busbar 11 provided at a position farther from the cooler 5 than the busbar 12, the heat generated by the busbar 11 provided at a position where heat is difficult to radiate is efficiently cooled. Heat can be dissipated to the vessel 5.

<Busbar 12>
The power converter 1 according to the present embodiment includes a heat dissipation path by the projecting portion 12 a of the bus bar 12 in addition to the heat dissipation path by the first fastening member 21 and the second fastening member 22 . A non-connecting portion other than the connecting portion 30 of the bus bar 12 has a protruding portion 12 a that is bent toward the cooler 5 from a portion spaced apart from the cooler 5 . The projecting portion 12a is thermally connected to the cooling surface 5a via the insulating member 4. As shown in FIG. The projecting portion 12a is provided between the connecting portion 30 and the end portion 12b on the side opposite to the connecting portion 30. As shown in FIG. The width of the projecting portion 12a of the busbar 12 is the same as the width of the other portions of the busbar 12, as shown in FIG. The height of the projecting portion 12a on the cooler 5 side in the Z direction is the same as the height of the first fastening member 21 and the second fastening member 22 on the cooler 5 side.

With this configuration, the projecting portion 12a of the busbar 12 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4, so that the insulation between the busbar 12 and the cooler 5 is ensured. Heat generated by the busbar 12 can be radiated to the cooler 5 . Since the width of the projecting portion 12a of the busbar 12 is the same as the width of the other portions of the busbar 12, the width of the busbar 12 does not need to be increased. Moreover, it is possible to obtain the power conversion device 1 having a small size and a low-cost cooling structure.

In the present embodiment, busbar 12 is integrally molded with resin member 6 , but busbar 12 having projecting portion 12 a may not be integrally molded with resin member 6 . When the resin member 6 integrally molds at least the busbar 12, as shown in FIG. It has a molded bus bar protruding portion 12a1 that protrudes by being bent in the direction of . The molded bus bar projecting portion 12 a 1 projects from the resin member 6 toward the cooler 5 and is thermally connected to the cooling surface 5 a via the insulating member 4 . By configuring in this way, it is possible to reliably thermally connect the molded bus bar projecting portion 12a1 and the cooling surface 5a. Since the molded busbar projecting portion 12 a 1 and the cooling surface 5 a can be reliably thermally connected, the heat generated by the busbar 12 can be easily radiated to the cooler 5 . It should be noted that the molded bus bar projecting portion 12 a 1 of the integrally molded bus bar 12 is not limited to projecting from the resin member 6 toward the cooler 5 side. may have the same height in the Z direction. Even if the molded bus bar protruding portion 12a1 and the surface of the resin member 6 facing the cooler 5 have the same height, the integrated molded product is fixed to the cooler 5 by pressing the insulating member 4. Therefore, it is possible to thermally connect the molded bus bar projecting portion 12a1 and the cooling surface 5a.

The power conversion device 1 according to the present embodiment can be provided with a heat dissipation path by the first fastening member 21 , the second fastening member 22 , and the projecting portion 12 a of the busbar 12 . When the power conversion device 1 has a plurality of heat dissipation paths in this way, the heat of the busbars 11 and 12 can be efficiently dissipated. Since the heat of busbars 11 and 12 can be efficiently dissipated, the cross-sectional areas of busbars 11 and 12 can be reduced. Since the cross-sectional areas of busbars 11 and 12 can be reduced, the cost of busbars 11 and 12 can be reduced.

<Modification 1>
A modification of this embodiment will be described. In the embodiment shown in FIG. 2, the bus bar 12, the first fastening member 21, the second fastening member 22, and the fastening portions 21a, 22a, and 23a of the fixing member 23 are integrally molded with the resin member 6. However, the configuration is not limited to the configuration in which all of these members are integrally molded, and the configuration shown in FIG. 4 may also be used. FIG. 4 is a cross-sectional view schematically showing a main part of another power conversion device 1 according to Embodiment 1. As shown in FIG. In the power conversion device 1 shown in FIG. 4 , the bus bar 12 and the fastening portions 21 a and 22 a of the first fastening member 21 and the second fastening member 22 are not integrally molded with the resin member 6 . Fastening portion 21a and bus bar 12 are connected by welding or the like. The fastening portion 22a and the busbar 11 are connected by welding or the like. One or both of the busbar 11 and the busbar 12 are fixed to the resin member 6 by adhesion or the like. By fixing the resin member 6 to the cooler 5 , the busbar 11 , the busbar 12 , the first fastening member 21 , and the second fastening member 22 are fixed to the cooler 5 .

By configuring in this way, the bus bar 12 that is not integrally molded with the resin member 6 and the fastening portions 21 a and 22 a of the first fastening member 21 and the second fastening member 22 that are not integrally molded with the resin member 6 are connected to the power converter 1 . can be used for Since the busbar 12 and the fastening portions 21a and 22a are not integrally molded, when a problem occurs in these members, only the member in which the problem occurs can be easily replaced. In the embodiment shown in FIG. 2, busbar 11 is not integrally molded with resin member 6, but busbar 11 may be integrally molded with resin member 6. FIG. When the busbar 11 is integrally molded with the resin member 6, the work of assembling the busbar 11 to the cooler 5 is simplified, so the productivity of the power converter 1 can be improved. Since the productivity of the power conversion device 1 is improved, the manufacturing cost of the power conversion device 1 can be reduced.

<Modification 2>
In the embodiment shown in FIG. 2, only the busbar 12 is provided with the protruding portion of the busbar. However, the busbar provided with the protruding portion is not limited to the busbar 12. I do not care. 5 and 6 are cross-sectional views schematically showing main parts of another power conversion device 1 according to Embodiment 1. FIG. In the power conversion device 1 shown in FIG. 5, the busbar 12 has a projecting portion 12a, and the busbar 11 has a projecting portion 11a. In power converter 1 shown in FIG. 6, bus bar 12 does not have a projecting portion, and bus bar 11 has projecting portion 11a. With this configuration, the protruding portion 11a of the busbar 11 is thermally connected to the cooling surface 5a of the cooler 5 through the insulating member 4. Therefore, while ensuring insulation between the busbar 11 and the cooler 5, Heat generated by the busbar 11 can be radiated to the cooler 5 . Since the heat of busbar 11 can be radiated more efficiently, the cross-sectional area of busbar 11 can be reduced. Since the cross-sectional area of the busbar 11 can be reduced, the cost of the busbar 11 can be reduced.

As described above, in power conversion device 1 according to Embodiment 1, bus bars 11 and 12 and bus bars 11 and 12 overlap and electrically connect connection portion 30, which fastens and thermally connects connection portion 30. A first fastening member 21 connected and having thermal conductivity, a cooler 5 having a cooling surface 5a facing the busbars 11 and 12, and provided between the cooling surface 5a and the busbars 11 and 12, The first fastening member 21 extends in the direction of the cooler 5 from the connecting portion 30 and is connected to the cooling surface 5a via the insulating member 4. Since the first extension portion 21a1 is thermally connected to the cooling surface 5a through the insulating member 4, the first extension portion 21a1 is thermally connected to the cooling surface 5a. The heat generated by the busbars 11 and 12 can be radiated to the cooler 5 while ensuring the insulation of the device 5 . In addition, since the ends of the busbars 11 and 12 fastened by the first fastening member 21 have the same width as the other portions of the busbars 11 and 12, it is necessary to increase the width of the busbars 11 and 12 at the connection portion 30. Therefore, it is possible to obtain the power converter 1 having a compact and low-cost cooling structure while maintaining the function of dissipating the heat generated by the bus bars 11 and 12 .

A non-connecting portion of the bus bar 12 other than the connecting portion 30 has a protruding portion 12a that is bent and protrudes toward the cooler 5 from a portion spaced apart from the cooler 5, and the protruding portion 12a extends through the insulating member 4 to the cooling surface. 5a, the projecting portion 12a of the busbar 12 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4, thereby ensuring insulation between the busbar 12 and the cooler 5. The heat generated by the bus bar 12 can be radiated to the cooler 5 while the heat is generated. In addition, since the width of the protruding portion 12a of the busbar 12 is the same as the width of the other portions of the busbar 12, there is no need to increase the width of the busbar 12. It is possible to obtain the power conversion device 1 having a compact, low-cost cooling structure while maintaining the above.

The second fastening member 22 thermally or electrically connects the electronic component 7 to the electronic component 7 and the non-connecting portion of the bus bar 11 other than the connecting portion 30, and has thermal conductivity. The fastening member 22 extends in the direction of the cooler 5 from the non-connected portion to which the second fastening member 22 is connected, and is thermally connected to the cooling surface 5 a via the insulating member 4 . When the extending portion 22a1 is provided, the second extending portion 22a1 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4, so insulation between the bus bar 11 and the cooler 5 is ensured. The heat generated by the bus bar 11 can be radiated to the cooler 5 while the heat is generated. Further, since the width of the portion of the busbar 11 to which the electronic component 7 is connected by the second fastening member 22 is the same as the width of the other portion of the busbar 11, there is no need to increase the width of the busbar 11. It is possible to obtain the power conversion device 1 having a compact and low-cost cooling structure while maintaining the function of dissipating the heat generated in .

When one or more of the busbars 11 and 12, the first fastening member 21, and the second fastening member 22 are provided and the resin member 6 is integrally molded, and the resin member 6 is fixed to the cooling surface 5a, the individual members Since an integrated molded product can be fixed to the cooler 5 instead of the other, the molded member can be easily fixed to the cooler 5 . Fixing the molded product to the cooler 5 simplifies the manufacturing process of fixing each member to the cooler 5 , so the productivity of the power converter 1 can be improved. Since the productivity of the power conversion device 1 is improved, the manufacturing cost of the power conversion device 1 can be reduced.

The cooling surface 5a has at least two recesses 5c, the resin member 6 has at least two protrusions 6a, and the at least two recesses 5c of the cooling surface 5a and the at least two protrusions 6a of the resin member 6 are When the cooler 5 and the resin member 6 are positioned in the XY directions by fitting each other, the cooler 5 and the resin member 6 can be easily positioned in the XY directions.

The resin member 6 integrally molds at least the first fastening member 21 and the second fastening member 22 , and the integrally molded first fastening member 21 and the second fastening member 22 are formed from the resin member 6 to the cooler 5 . and is thermally connected to the cooling surface 5a through the insulating member 4, the first fastening member 21 and the second fastening member 22 are reliably thermally connected to the cooling surface 5a. be able to. In addition, the resin member 6 integrally molds at least the busbar 12, and the non-connecting portion of the integrally molded busbar 12 other than the connecting portion 30 is bent toward the cooler 5 from a portion spaced apart from the cooler 5 and protrudes. When the molded busbar projecting portion 12a1 projects from the resin member 6 toward the cooler 5 side and is thermally connected to the cooling surface 5a via the insulating member 4, the molded busbar projecting portion 12a1 The portion 12a1 and the cooling surface 5a can be reliably thermally connected.

Embodiment 2.
A power converter 1 according to Embodiment 2 will be described. FIG. 8 is a cross-sectional view schematically showing a main part of the power conversion device 1 according to Embodiment 2, and is a cross-sectional view of the main part of the power conversion device 1 cut at a position equivalent to the AA cross-sectional position in FIG. be. In the first embodiment, the second fastening member 22 for fixing the electronic component 7 and the busbar 11 is provided. configuration.

The power conversion device 1 includes a third fastening member 24 having a portion integrally molded with the resin member 6 and having thermal conductivity. The third fastening member 24 is composed of a fastening portion 24a having a screw hole and a screw 24b. The fastening portion 24 a is integrally formed with the resin member 6 . A non-molded bus bar, which is the bus bar 11 that is not integrally molded with the resin member 6 , is fixed to the resin member 6 by a third fastening member 24 . The fastening portion 24a of the third fastening member 24 extends in the direction of the cooler 5 from the portion of the non-molded bus bar to which the third fastening member 24 is connected, and the portion exposed from the resin member 6 is located close to the insulating member 4. It has a third extending portion 24a1 that is thermally connected to the cooling surface 5a via. A portion of the fastening portion 24a on the side of the cooling surface 5a is the third extending portion 24a1. The width of the portion of busbar 11 connected to third fastening member 24 is the same as the width of the other portion of busbar 11 .

As described above, in the power conversion device 1 according to Embodiment 2, the third extension portion 24a1 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4, so that the bus bar 11 and the cooling The heat generated by the bus bar 11 can be radiated to the cooler 5 while ensuring the insulation of the device 5 . Since the width of the portion of the busbar 11 connected to the third fastening member 24 is the same as the width of the other portion of the busbar 11, there is no need to increase the width of the busbar 11, so the heat generated in the busbar 11 can be dissipated. It is possible to obtain the power conversion device 1 having a compact and low-cost cooling structure while maintaining the heat dissipation function.

In the embodiment shown in FIG. 8, the third fastening member 24 is provided only on the busbar 11, but the busbar on which the third fastening member 24 is provided is not limited to the busbar 11. The configuration shown may also be used. 9 and 10 are cross-sectional views schematically showing essential parts of another power conversion device 1 according to Embodiment 2, and the power conversion device 1 cut at a position equivalent to the AA cross-sectional position in FIG. FIG. 4 is a cross-sectional view of a main part; The power converter 1 shown in FIG. 9 has a third fastening member 25 to which the busbar 12 is fixed, and has a third fastening member 24 to which the busbar 11 is fixed. The third fastening member 25 is composed of a fastening portion 25a having a screw hole and a screw 25b. The fastening portion 25 a is integrally formed with the resin member 6 . A portion of the fastening portion 25a on the side of the cooling surface 5a is the third extending portion 25a1. The power conversion device 1 shown in FIG. 10 has only the third fastening member 25 to which the busbar 12 is fixed, and does not have the third fastening member to which the busbar 11 is fixed.

With this configuration, the third extending portion 25a1 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4, so insulation between the bus bar 12 and the cooler 5 is ensured. , the heat generated in the busbar 12 can be further radiated to the cooler 5 . Since the heat generated by the busbars 12 can be dissipated further to the cooler 5, the cross-sectional area of the busbars 12 can be reduced. Since the cross-sectional area of the busbar 12 can be reduced, the cost of the busbar 12 can be reduced.

Embodiment 3.
A power converter 1 according to Embodiment 3 will be described. FIG. 11 is a cross-sectional view schematically showing the power conversion device 1 according to Embodiment 3, and is a cross-sectional view of the power conversion device 1 cut at a position equivalent to the AA cross-sectional position in FIG. A power conversion device 1 according to Embodiment 3 is configured such that a bus bar 12 and a resin member 6 are positioned in the XY directions.

The non-molded busbar, which is the busbar 12 that is not integrally molded with the resin member 6, has at least two recesses 12c, and the resin member 6 has at least two protrusions 6c. In this embodiment, bus bar 12 has two recesses 12c, and resin member 6 has two protrusions 6c. The two recesses 12c of the busbar 12 and the two protrusions 6c of the resin member 6 are fitted to each other, so that the busbar 12 and the resin member 6 are positioned in the XY directions. In addition, the shape of the concave portion 12c may be a through hole. If the shape of recess 12 c is a through hole, projection 6 c may be formed with a height that penetrates bus bar 12 .

The configuration for positioning the bus bar 12 and the resin member 6 is not limited to this. A configuration having two concave portions may also be used. At least two projections of the non-molded bus bar and at least two recesses of the resin member 6 are fitted to each other, so that the bus bar and resin member 6 are positioned in the XY directions.

As described above, in power conversion device 1 according to Embodiment 3, bus bar 12 and resin member 6 are positioned in the XY directions by the recesses and projections, so that bus bar 12 and resin member 6 can be easily positioned in the XY directions. can be done. Since the busbar 12 and the resin member 6 can be easily positioned in the XY directions, the process of assembling the busbar 12 to the resin member 6 is facilitated, and the productivity of the power conversion device 1 can be improved. Since the productivity of the power conversion device 1 is improved, the manufacturing cost of the power conversion device 1 can be reduced.

Embodiment 4.
A power converter 1 according to Embodiment 4 will be described. 12 is a diagram showing an outline of the circuit of the power conversion device 1 according to Embodiment 4, FIG. 13 is a perspective view showing an outline of the main part of the power conversion device 1, and FIG. 14 is an outline of the main part of the power conversion device 1. 1 is a perspective view showing a part of a resin member 6 and a transformer core 81 and a reactor core 91 removed. A power conversion device 1 according to Embodiment 4 includes a transformer 8 and a reactor 9, and has a configuration in which bus bars 11 and 12 have coil portions 13 and .

The power conversion device 1 includes a transformer 8, a reactor 9, a plurality of diodes 100, and a capacitor 110, as shown in FIG. FIG. 13 shows the structure of the transformer 8 and reactor 9 shown in FIG. 12 and the connection portion of the transformer 8 and reactor 9, omitting other members. The transformer 8 and reactor 9 are magnetic parts.

<Transformer 8>
The transformer 8 has a transformer core 81 that is a magnetic core and a coil portion 13 . The transformer core 81 has an annular outer core and a columnar central core 81a connecting two opposing portions of the outer core. The central core 81a extends away from the cooling surface 5a. Transformer core 81 is made of a magnetic material such as ferrite. In the present embodiment, two E-shaped split cores 81b and 81c are stacked in the Z direction to form transformer core 81 having a closed magnetic circuit structure. The configuration of the transformer core 81 is not limited to the two E-shaped split cores 81b and 81c, and may be the configuration shown in FIG. FIG. 15 is a perspective view schematically showing a transformer core 81 of another power conversion device 1 according to Embodiment 4. FIG. A transformer core 81 having a closed magnetic circuit structure is formed by stacking two split cores 81d and 81e formed in an E-shape and an I-shape in the Z direction. The transformer core 81 is thermally connected to the cooling surface 5a.

The bus bar 11 has a coil portion 13 that is curved around the central core 81a along the cooling surface 5a and wound around the central core 81a. The busbar 11 and the coil portion 13 are made of the same material and integrated. The busbar 11 and the coil portion 13 of the busbar 11 are collectively referred to as a busbar coil 15 . The busbar coil 15 is integrally formed with the resin member 61 with the busbar 11 portion exposed. The resin member 61 is fixed to the cooler 5 with a fixing member 231 . By fixing the resin member 61 to the cooler 5 , the split core 81 c is positioned in the XY direction and fixed to the cooler 5 . The split core 81b is pressed by a pressing member (not shown) such as a spring, positioned in the Z direction, and fixed to the cooler 5 .

With this configuration, the transformer core 81 is thermally connected to the cooling surface 5 a , so heat generated in the transformer 8 can be easily radiated to the cooler 5 . Further, since the transformer 8 is formed from the transformer core 81 and the coil portion 13 of the bus bar 11, the transformer 8 can be easily manufactured. Since the transformer 8 can be easily manufactured, the productivity of the power converter 1 can be improved. A member made of a material different from that of the core, such as resin, may be provided between the split cores 81b and 81c forming the closed magnetic circuit. Thus, by adjusting the dimension between the transformer core 81 and the coil portion 13, the electromagnetic characteristics of the transformer 8 can be adjusted to desired characteristics while maintaining insulation between the members.

Magnetic components having a magnetic core and a coil portion are not limited to the transformer 8 and the reactor 9, and filters and the like can also be configured in this manner. The power conversion device 1 may include a plurality of magnetic components each having a magnetic core and a coil portion. By configuring the plurality of magnetic components in this manner, the heat generated by the plurality of magnetic components can be easily dissipated to the cooler 5 . Moreover, since each of the plurality of magnetic components is formed from the magnetic core and the coil portion, each of the plurality of magnetic components can be easily manufactured.

A busbar 11 having a coil portion 13 is fastened to another busbar 12 by a first fastening member 21 . In this embodiment, the other busbar 12 has a coil portion 14 as will be described later, but the busbar 12 may be a busbar that does not have a coil portion. The width of the ends of busbars 11 and 12 fastened by first fastening member 21 is the same as the width of other portions of busbars 11 and 12 . The first fastening member 21 has a first extending portion 21a1 thermally connected to the cooling surface 5a via the insulating member 4 . The first extending portion 21 a 1 presses the insulating member 4 by fixing the resin member 61 integrally formed with the busbar coil 15 to the cooler 5 with the fixing member 231 .

With this configuration, the first extending portion 21a1 of the first fastening member 21 that fastens the busbars 11 and 12 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4. Therefore, heat generated by the busbars 12 , the busbar coil 15 and the transformer 8 can be radiated to the cooler 5 while ensuring insulation between the busbars 11 and 12 and the cooler 5 . Since the ends of the busbars 11 and 12 fastened by the first fastening member 21 have the same width as the other portions of the busbars 11 and 12, the heat generated by the busbar 12, the busbar coil 15, and the transformer 8 is dissipated. It is possible to obtain the power conversion device 1 having a compact, low-cost cooling structure while maintaining the functions.

<Reactor 9>
In this embodiment, the reactor 9, which is another magnetic component included in the power converter 1, will be described. Hereinafter, the transformer core 81 described above will be referred to as a second magnetic core, the coil portion 13 will be referred to as a second coil portion, and the busbar 11 will be referred to as a second busbar. The reactor 9 has a reactor core 91 that is a first magnetic core and a coil portion 14 that is a first coil portion. The reactor core 91 has an annular outer core and a columnar central core 91a connecting two opposing portions of the outer core. The central core 91a extends away from the cooling surface 5a. Reactor core 91 is made of a magnetic material such as ferrite. In the present embodiment, reactor core 91 having a closed magnetic circuit structure is formed by stacking two E-shaped split cores 91b and 91c in the Z direction. The structure of the reactor core 91 is not limited to the two E-shaped split cores 91b and 91c, and may be two E-shaped and I-shaped split cores. The reactor core 91 is thermally connected to the cooling surface 5a.

The bus bar 12, which is the first bus bar, has a coil portion 14 that is curved around the central core 91a along the cooling surface 5a and wound around the central core 91a. The busbar 12 and the coil portion 14 are made of the same material and integrated. The busbar 12 and the coil portion 14 of the busbar 12 are collectively referred to as a busbar coil 16 . The busbar coil 16 is integrally formed with the resin member 62 with the busbar 12 portion exposed. The resin member 62 is fixed to the cooler 5 with a fixing member 232 . By fixing the resin member 62 to the cooler 5 , the split core 91 c is positioned in the XY direction and fixed to the cooler 5 . The split core 91 b is pressed by a pressing member (not shown) such as a spring, positioned in the Z direction, and fixed to the cooler 5 .

The busbar 12 and the busbar 11 are fastened by a first fastening member 21 . The width of the ends of busbars 11 and 12 fastened by first fastening member 21 is the same as the width of other portions of busbars 11 and 12 . The first fastening member 21 has a first extending portion 21a1 thermally connected to the cooling surface 5a via the insulating member 4 .

With this configuration, the first extending portion 21a1 of the first fastening member 21 that fastens the busbars 11 and 12 is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4. Therefore, while ensuring insulation between the busbars 11 and 12 and the cooler 5, the transformer 8 and the reactor 9 are electrically connected to cool the heat generated by the busbar coil 15, the busbar coil 16, the transformer 8, and the reactor 9. Heat can be dissipated to the vessel 5. Since the heat generated by the busbar coil 15, the busbar coil 16, the transformer 8, and the reactor 9 can be dissipated to the cooler 5, the width and thickness of each coil can be reduced. Since the width and thickness of each coil can be reduced, the size of the transformer 8 and the reactor 9 can be reduced, and the weight of the transformer 8 and the reactor 9 can be reduced. Since the transformer 8 and the reactor 9 can be made smaller, the cost of the transformer 8 and the reactor 9 can be reduced. In addition, since the ends of the busbars 11 and 12 fastened by the first fastening member 21 have the same width as the other portions of the busbars 11 and 12, the busbar coils 15, 16, transformer 8, and reactor 9 It is possible to obtain the power converter 1 having a compact and low-cost cooling structure while maintaining the function of dissipating the generated heat.

In this embodiment, an additional bus bar 17 that the reactor 9 further has will be described. The additional bus bar 17 has an additional coil portion 18 that is curved around the central core 91a along the cooling surface 5a and wound around the central core 91a. Additional busbar 17 and busbar coil 16 are made from the same material. A portion of the additional coil portion 18 of the additional bus bar 17 is integrally molded with the resin member 62 . Between the split cores 91b and 91c forming a closed magnetic circuit, a member made of a material other than the core, such as resin, may be provided. Thereby, the dimensions between the reactor core 91, the coil portion 14, and the additional coil portion 18 can be adjusted, and the electromagnetic characteristics of the reactor 9 can be adjusted to desired characteristics while maintaining insulation between the respective members.

The power conversion device 1 fastens an additional connection portion 31 in which the busbar 12 and the additional busbar 17 are overlapped and electrically connected to each other, and a fourth fastening member 26 thermally connected to the additional connection portion 31. Prepare. The fourth fastening member 26 has thermal conductivity. The coil portion 14 and the additional coil portion 18 have the same current flowing direction around the central core 91a of the reactor core 91 . The width of the ends of the busbar 12 and the additional busbar 17 fastened by the fourth fastening member 26 is the same as the width of the other portions of the busbar 12 and the additional busbar 17 . The fourth fastening member 26 extends in the direction of the cooler 5 from the additional connection portion 31 and has a fourth extension portion 26a1 thermally connected to the cooling surface 5a via the insulating member 4. there is The fourth fastening member 26 is composed of a fastening portion 26a having a screw hole and a screw 26b. A portion of the fastening portion 26a on the side of the cooling surface 5a is the fourth extending portion 26a1. The fourth fastening member 26 is made of metal such as iron or stainless steel, for example. The fourth extending portion 26 a 1 presses the insulating member 4 by fixing the resin member 62 integrally formed with the additional bus bar 17 to the cooler 5 with the fixing member 232 .

With this configuration, the additional connection portion 31 in which the busbar 12 and the additional busbar 17 are overlapped and electrically connected to each other cools the cooler 5 through the insulating member 4 by the fourth extension portion 26a1. Since it is thermally connected to the surface 5a, the heat can be directly dissipated from the middle portion of the coil where the temperature rise is the largest and the heat is difficult to dissipate. Since heat can be directly dissipated in the middle of the coil, the temperature of the busbar coil 16 and the additional busbar 17 that constitute the reactor 9 can be reduced. Since the temperature of the busbar coil 16 and the additional busbar 17 can be reduced, the width and thickness of the busbar coil 16 and the additional busbar 17 can be reduced, and the reactor 9 can be miniaturized. Since the reactor 9 is miniaturized, the power converter 1 is miniaturized, and the cost of the power converter 1 can be reduced.

Downsizing of the transformer 8 and the reactor 9 will be described. The sizes of the magnetic cores of the transformer 8 and the reactor 9 are determined by the inner diameter, outer diameter, thickness, electromagnetic characteristics, etc. of the coil portions 13 and 14 wound around the central cores 81a and 91a. be. Specifically, the electromagnetic properties determine the cross-sectional area of the magnetic core in the closed magnetic circuit. The distance in the Y direction from the central cores 81a, 91a to the outer pillars 82, 92 of the outer core shown in FIG. The outer column of the outer core is a portion of the outer core that extends away from the cooling surface 5a. The height of the magnetic core is determined according to the thickness of the coil portions 13 and 14 so as to secure a space in which the coil portions 13 and 14 can be accommodated. Therefore, as the width and thickness of the coil portions 13 and 14 are reduced, the overall size of the magnetic core can be reduced. Since the size of the magnetic core can be reduced, the size of the transformer 8 and the reactor 9 can be reduced. Since the transformer 8 and the reactor 9 are miniaturized, the power conversion device 1 can be miniaturized. In addition, since equipment including the power conversion device 1 is also downsized, the cost of the equipment can be reduced.

In addition to miniaturization of the transformer 8 and the reactor 9, since the busbar coil 15, the busbar coil 16, and the additional busbar 17 are integrally molded with the resin members 61 and 62, it is possible to manufacture fixing of each member to the cooler 5. Since the steps are simplified, the productivity of the power converter 1 can be improved. Since the productivity of the power conversion device 1 is improved, the manufacturing cost of the power conversion device 1 can be reduced. In the present embodiment, the busbar coil 15, the busbar coil 16, and the additional busbar 17 are integrally molded with the resin members 61 and 62, but these structures are not limited to the integrally molded structure. Each member may be individually stacked and assembled to the cooler 5 . When each member is individually stacked and assembled, the resin member 6 can be formed without integrally molding a plurality of members, so the molding process can be simplified.

As described above, the power converter 1 according to Embodiment 4 includes the transformer core 81 having the annular outer core and the columnar central core 81a, and the bus bar 11 extends around the central core 81a along the cooling surface 5a. Since the transformer core 81 is thermally connected to the cooling surface 5 a , the heat generated in the transformer 8 can be easily radiated to the cooler 5 . Further, since the transformer 8 is formed from the transformer core 81 and the coil portion 13 of the bus bar 11, the transformer 8 can be easily manufactured.

When the power conversion device 1 includes a plurality of magnetic components such as a transformer 8 having a magnetic core and a coil portion, each of the plurality of magnetic components is thermally connected to the cooling surface 5a. The generated heat can be easily radiated to the cooler 5 . Further, when the busbar 11 having the coil portion 13 is fastened to the other busbar 12 by the first fastening member 21, the first extending portion 21a1 of the first fastening member 21 fastening the busbars 11, 12 is , is thermally connected to the cooling surface 5a of the cooler 5 via the insulating member 4, the busbar coil 15 including the busbar 11, the busbar 12, and Heat generated in the transformer 8 can be radiated to the cooler 5 .

A bus bar 12 having a reactor core 91, a coil portion 14 curved around the center core 91a of the reactor core 91, a transformer core 81, and a bus bar 11 having a coil portion 13 curved around the center core 81a of the transformer core 81. and when the busbars 12 and 11 are fastened together by the first fastening member 21, the first extending portion 21a1 of the first fastening member 21 fastening the busbars 11, 12 moves the insulating member 4. is thermally connected to the cooling surface 5a of the cooler 5 via the busbar coils 15, 15, 15, 15, 15, 16, 17, 18, 18, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, Heat generated by the busbar coil 16 , the transformer 8 , and the reactor 9 can be radiated to the cooler 5 . Since the heat generated by the busbar coil 15, the busbar coil 16, the transformer 8, and the reactor 9 can be dissipated to the cooler 5, the width and thickness of each coil can be reduced. Since the width and thickness of each coil can be reduced, the size of the transformer 8 and the reactor 9 can be reduced, and the weight of the transformer 8 and the reactor 9 can be reduced.

An additional busbar 17 having an additional coil portion 18 curved around a central core 91a of a reactor core 91, and an additional connection portion 31 in which the busbar 12 and the additional busbar 17 are overlapped and electrically connected are fastened. and a fourth fastening member 26 thermally connected to the additional connection portion 31, the fourth fastening member 26 extending in the direction of the cooler 5 from the additional connection portion 31, and through the insulating member 4 In the case of having a fourth extending portion 26a1 thermally connected to the cooling surface 5a, the additional connection portion 31 is connected to the cooling surface 5a of the cooler 5 via the insulating member 4 by the fourth extending portion 26a1. Since it is thermally connected, heat can be directly dissipated from the middle portion of the coil where the temperature rise is the largest and heat is difficult to dissipate. Since heat can be directly dissipated in the middle of the coil, the temperature of the busbar coil 16 and the additional busbar 17 that constitute the reactor 9 can be reduced. Since the temperature of the busbar coil 16 and the additional busbar 17 can be reduced, the width and thickness of the busbar coil 16 and the additional busbar 17 can be reduced, and the reactor 9 can be miniaturized.

Also, while this application has described various exemplary embodiments and examples, various features, aspects, and functions described in one or more of the embodiments may vary from particular embodiment to specific embodiment. The embodiments are applicable singly or in various combinations without being limited to the application.
Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

1 power converter, 11 busbar, 11a protrusion, 12 busbar, 12a protrusion, 12a1 molded busbar protrusion, 12b end, 12c recess, 13 coil section, 14 coil section, 15 busbar coil, 16 busbar coil, 17 addition bus bar 18 additional coil portion 21 first fastening member 21a fastening portion 21a1 first extension portion 21b screw 22 second fastening member 22a fastening portion 22a1 second extension portion 22b screw , 23 fixed member, 23a fastening portion, 23b screw, 24 third fastening member, 24a fastening portion, 24a1 third extension portion, 24b screw, 25 third fastening member, 25a fastening portion, 25a1 third extension portion , 25b screw, 26 fourth fastening member, 26a fastening portion, 26a1 fourth extension portion, 26b screw, 30 connecting portion, 31 additional connecting portion, 4 insulating member, 5 cooler, 5a cooling surface, 5b screw hole, 5c recess 5d projection 6 resin member 6a projection 6b recess 6c projection 7 electronic component 8 transformer 81 transformer core 81a center core 81b split core 81c split core 81d split core 81e Split core, 82 Outer column, 9 Reactor, 91 Reactor core, 91a Center core, 91b Split core, 91c Split core, 92 Outer column, 100 Diode, 110 Capacitor

Claims (8)

a plurality of busbars;
a thermally conductive first fastening member that fastens a connecting portion where at least two bus bars are electrically connected to each other and is thermally connected to the connecting portion;
a cooler having a cooling surface facing the plurality of busbars;
an insulating member provided between the cooling surface and the bus bar and having thermal conductivity and electrical insulation;
the first fastening member has a first extending portion that extends in the direction of the cooler from the connecting portion and is thermally connected to the cooling surface via the insulating member ;
a non-connecting portion other than the connecting portion of the bus bar has a protruding portion that protrudes by being bent toward the cooler from a portion spaced apart from the cooler;
The power conversion device , wherein the projecting portion is thermally connected to the cooling surface via the insulating member . a plurality of busbars;
a thermally conductive first fastening member that fastens a connecting portion where at least two bus bars are electrically connected to each other and is thermally connected to the connecting portion;
a cooler having a cooling surface facing the plurality of busbars;
an insulating member provided between the cooling surface and the bus bar and having thermal conductivity and electrical insulation;
electronic components;
a second fastening member that thermally or electrically connects the electronic component to a non-connecting portion of the bus bar other than the connecting portion, and has thermal conductivity;
the first fastening member has a first extending portion that extends in the direction of the cooler from the connecting portion and is thermally connected to the cooling surface via the insulating member;
The second fastening member extends in the direction of the cooler from the portion of the unconnected portion to which the second fastening member is connected, and is thermally connected to the cooling surface via the insulating member. a power converter having a curved second extension. a resin member in which one or more of the plurality of busbars, the first fastening member, and the second fastening member are integrally molded;
The power converter according to claim 2 , wherein the resin member is fixed to the cooling surface. a thermally conductive third fastening member having a portion integrally molded with the resin member;
The non-molded bus bar, which is the bus bar that is not integrally molded with the resin member, is fixed to the resin member by the third fastening member,
A portion of the third fastening member integrally molded with the resin member extends in the direction of the cooler more than a portion of the non-molded bus bar to which the third fastening member is connected, and is exposed from the resin member. 4. The power converter according to claim 3 , further comprising a third extending portion thermally connected to said cooling surface via said insulating member at said portion. A non-molded bus bar, which is the bus bar that is not integrally molded with the resin member, has at least two projections, the resin member has at least two recesses, and the non-molded bus bar has at least two projections. The portion and the at least two recesses of the resin member are fitted to each other and positioned,
Alternatively, the non-molded bus bar, which is the bus bar that is not integrally molded with the resin member, has at least two recesses, the resin member has at least two protrusions, and the non-molded bus bar has at least two protrusions. 5. The power converter according to claim 3 or 4 , wherein said recessed portion and said at least two projections of said resin member are fitted to each other and positioned. The cooling surface has at least two recesses, the resin member has at least two protrusions, and the at least two recesses of the cooling surface and the at least two protrusions of the resin member each fitted to each other and positioned,
Alternatively, the cooling surface has at least two protrusions, the resin member has at least two recesses, and the at least two protrusions of the cooling surface and the at least two recesses of the resin member 6. The power conversion device according to any one of claims 3 to 5 , wherein the power converters are positioned so as to fit each other. The resin member integrally molds at least the first fastening member and the second fastening member,
The first fastening member and the second fastening member integrally molded project from the resin member toward the cooler and are thermally connected to the cooling surface via the insulating member. 7. The power converter according to any one of items 3 to 6 . The resin member integrally molds at least the bus bar,
A non-connecting portion other than the connecting portion of the integrally molded bus bar has a formed bus bar protruding portion that protrudes by being bent in a direction toward the cooler from a portion spaced apart from the cooler,
8. The molded busbar projecting portion according to any one of claims 3 to 7 , wherein the molded busbar projecting portion projects from the resin member toward the cooler and is thermally connected to the cooling surface via the insulating member. Power converter.

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