JP7419963B2 - power converter - Google Patents

Description

The disclosure described in this specification relates to a power conversion device.

Patent Document 1 discloses a power conversion device having a circuit board and a connector terminal for connecting the circuit board and an external circuit. These are housed in a case provided with terminal insertion holes. A portion of the connector terminal is passed through the terminal insertion hole.

JP2019-62651A

The board is located closer to the bottom of the case than the terminal insertion hole. Therefore, the length of the connector terminal extending from the board to the outside of the case through the terminal communication hole can be easily extended.

Furthermore, when current flows through the connector terminal, electromagnetic noise is generated from the connector terminal. As described above, since the length of the connector terminal is easily extended, the section where electromagnetic noise is generated from the connector terminal is becoming longer. This makes it easier for electromagnetic noise generated from the connector terminals to pass through the circuit board.

Therefore, an object of the present disclosure is to provide a power conversion device in which electromagnetic noise generated from a conductive member is suppressed from being transmitted through a substrate.

A power conversion device according to one aspect of the present disclosure includes:
a substrate (700);
a conductive member (830) connecting the board and an external power source (910);
a case (600) that is made of a first high magnetic permeability material that has higher magnetic permeability than air and stores the substrate and the conductive member in a storage space;
The case is formed with an opening (625) that opens to an inner surface (620a) that partitions a part of the storage space at the side (620) of the case and an outer surface (620b) on the back thereof. A peripheral edge portion (640) is formed that extends annularly around the outer surface side and stands up in the direction in which the inner surface side openings and the outer surface side openings of the opening are lined up,
The peripheral portion is formed of a second high magnetic permeability material that has higher magnetic permeability than air,
At least a portion of the substrate is located in a projection area in the direction in which the openings are arranged,
The conductive member extends from the substrate housed in the housing space to the outside of the housing space through the hollows of the opening and the peripheral edge.

In this manner, in the present disclosure, at least a portion of the substrate (700) is located in the projection area in the direction in which the openings (625) are arranged. Therefore, the extension of the conductive member (830) extending from the substrate (700) stored in the storage space to the outside of the storage space through the opening (625) and the hollow of the peripheral edge (640) is easily suppressed. There is.

When a current flows through the conductive member (830), electromagnetic noise is generated from the conductive member (830). In contrast, in the present disclosure, as described above, the conductive member (830) passes through the hollow portion of the peripheral portion (640) that extends annularly around the opening (625). Therefore, electromagnetic noise generated from the conductive member (830) easily passes through the peripheral portion (640).

Further, extension of the conductive member (830) is suppressed. Therefore, the section in which electromagnetic noise is generated from the conductive member (830) is shortened. These make it difficult for electromagnetic noise generated from the conductive member (830) to pass through the substrate (700).

Note that in the present disclosure, at least a portion of the substrate (700) is located in the projection area in the direction in which the openings (625) are arranged. Therefore, there is a concern that electromagnetic noise that has entered the storage space from outside through the opening (625) may be transmitted through the substrate (700).

On the other hand, in the present disclosure, peripheral portions (640) that stand up in the direction of alignment around the outer surface (620b) side of the opening (625) are connected. Therefore, the peripheral edge (640) and the opening (625) are lined up in a direction intersecting the arrangement direction, and at least a portion of the opening (625) is easily covered by the peripheral edge (640). This makes it difficult for electromagnetic noise directed toward the opening (625) from outside the storage space to pass through the substrate (700).

Note that the reference numbers in parentheses above merely indicate correspondence with the configurations described in the embodiments described later, and do not limit the technical scope in any way.

FIG. 1 is a block diagram showing an in-vehicle system. FIG. 3 is a top view of the power conversion device. 3 is a sectional view taken along line III-III in FIG. 2. FIG. FIG. 2 is a side view of the power conversion device. FIG. 5 is a side view of the power converter shown in FIG. 4 with the second connector removed. It is a sectional view of a power conversion device for explaining a modification. It is a sectional view of a power conversion device for explaining a modification. It is a sectional view of a power conversion device for explaining a modification.

Hereinafter, a plurality of embodiments for carrying out the present disclosure will be described with reference to the drawings. In each form, parts corresponding to matters explained in the preceding form may be given the same reference numerals and redundant explanation may be omitted. When only a part of the configuration is described in each form, the other forms previously described can be applied to other parts of the structure.

In addition, combinations of parts that are specified in each embodiment as being possible in combination are also possible. It is also possible to partially combine embodiments, embodiments and modified examples, and modified examples together, even if not explicitly stated, as long as there is no particular problem in the combination.

(First embodiment)
An in-vehicle system 100 provided with a power conversion device 500 will be described based on FIG. 1. The in-vehicle system 100 constitutes a system for electric vehicles. In-vehicle system 100 includes a battery 200, a power converter 500, a motor 400, and a plurality of ECUs 900.

The plurality of ECUs 900 mutually transmit and receive signals via bus wiring. The plurality of ECUs 900 cooperate to control the electric vehicle. Under the control of the plurality of ECUs 900, regeneration and power running of the motor 400 are controlled according to the SOC of the battery 200. ECU900 is an abbreviation for electronic control unit. SOC is an abbreviation for state of charge.

Battery 200 includes a plurality of secondary batteries. These plurality of secondary batteries constitute a battery stack connected in series. The SOC of this battery stack corresponds to the SOC of the battery 200. As the secondary battery, a lithium ion secondary battery, a nickel hydride secondary battery, an organic radical battery, etc. can be employed.

The inverter 300 included in the power converter 500 has three or more phases connected in parallel between a P bus bar electrically connected to the positive electrode of the battery 200 and an N bus bar electrically connected to the negative electrode of the battery 200. It has legs. Each phase leg includes a plurality of switch elements connected in series between a P bus bar and an N bus bar.

Further, these plurality of switch elements are sealed with a sealing member to constitute a plurality of electronic modules. The plurality of switch elements are PWM-controlled by the MGECU of the plurality of ECUs 900. Electric power is supplied to the ECU 900 from an external power supply 910.

By subjecting the power converter 500 to PWM control, DC power supplied from the battery 200 is converted to AC power. This AC power is supplied to motor 400. Furthermore, AC power generated by the motor 400 is converted into DC power by the power conversion device 500. This DC power is supplied to the battery 200 and other on-vehicle equipment (not shown). In addition to the inverter 300, the power conversion device 500 may include a converter that increases or decreases the voltage level of the input DC power.

<Mechanical configuration of power converter>
Next, the mechanical configuration of power conversion device 500 will be explained. In this regard, hereinafter, three directions that are orthogonal to each other will be referred to as an x direction, a y direction, and a z direction. The x direction corresponds to the alignment direction. The y direction corresponds to the plane direction. Note that in the drawings, "directions" are omitted and are simply indicated as x, y, and z.

In addition to the components of the power conversion circuit described above, the power conversion device 500 includes a case 600, a substrate 700, a first connector 810, a second connector 820, wiring 830, and a fixing bolt 840 shown in FIG. . The wiring 830 corresponds to a conductive member.

Case 600 is a housing made of metal. As shown in FIG. 3, the case 600 has a bottom portion 610, side portions 620, and a lid portion 630. The bottom portion 610 has a flat shape with a small thickness in the z direction. The bottom portion 610 has an inner bottom surface 610a arranged in the z direction and an outer bottom surface 610b on the back side thereof.

The side portion 620 is connected to the inner bottom surface 610a. The side portion 620 stands annularly in the z direction.

The side portion 620 has a first wall portion 621 and a third wall portion 623 that are spaced apart and opposed to each other in the x direction, and a second wall portion 622 and a fourth wall portion 624 that are spaced apart and opposed to each other in the y direction. .

These first wall portion 621, second wall portion 622, third wall portion 623, and fourth wall portion 624 are connected in an annular manner in the circumferential direction around the z direction. Openings are defined at the tips spaced apart from the bottom 610 of the four walls.

The lid portion 630 has a flat shape with a small thickness in the z direction. The lid portion 630 is connected to a tip of the side portion 620 that is spaced apart from the bottom portion 610. As a result, the openings defined on the tip sides of the four walls are closed by the lid 630.

With the configuration described above, a storage space is defined in the case 600 by the bottom portion 610, the side portions 620, and the lid portion 630. Specifically, a storage space is defined in the case 600 by an inner bottom surface 610a of the bottom portion 610, an inner surface 620a of the side portion 620, and a lid bottom surface 630a of the lid portion 630 on the bottom portion 610 side. Note that the case 600 does not have to be made of metal. The case 600 may be formed of a high magnetic permeability material that has higher magnetic permeability than air. The high magnetic permeability material forming the case 600 corresponds to the first high magnetic permeability material.

The substrate 700 has a flat shape with a small thickness in the z direction. The above-described ECU 900 is mounted on the board 700. In addition to the ECU 900, the board 700 is equipped with a capacitor for noise processing, an IC chip, and the like. An electric circuit including an ECU 900, a capacitor, and an IC chip is formed on the substrate 700.

The first connector 810 includes a first resin member and a first conductive member inserted into the first resin member. One end and the other end of the first conductive member are exposed from the first resin member. One end of the first conductive member exposed from the first resin member is electrically and mechanically connected to an electric circuit formed on the substrate 700. The other end of the first conductive member exposed from the first resin member is connected to one end of the wiring 830. Note that the first resin member has a lower magnetic permeability than metal.

The second connector 820 includes a second resin member and a second conductive member inserted into the second resin member. The second resin member has a base portion 821 and a connecting portion 822. As shown in FIG. 2, the base 821 has a first bonding surface 821a and a second bonding surface 821b arranged in the x direction. The coupling portion 822 is coupled to the first coupling surface 821a side of the base portion 821. The coupling portion 822 stands up in the x direction in a manner that it moves away from the first coupling surface 821a. Note that the second resin member has a lower magnetic permeability than metal.

The connecting portion 822 is connected to the center side of the base portion 821 in a direction perpendicular to the x direction. A second conductive member is inserted into a connecting portion where the base portion 821 and the connecting portion 822 are connected. One end and the other end of the second conductive member are exposed from the connection portion. One end of the second conductive member is electrically and mechanically connected to the other end of the wiring 830. The other end of the second conductive member is electrically connected to an external power source 910 (not shown).

Note that, as shown in FIG. 2, a first fixing hole 823 penetrating in the x direction is formed in an unconnected portion of the base portion 821 that is not connected to the coupling portion 822 located on the end side in the direction orthogonal to the x direction. . A shaft portion of a fixing bolt 840 is passed through this first fixing hole 823 . The second connector 820 is fixed to the case 600 by the shaft portion of the fixing bolt 840.

The wiring 830 includes a conductive wire and an insulating resin member covering the surface of the wire. As described above, the wiring 830 is electrically and mechanically connected to the first connector 810 at one end. The wiring 830 is electrically and mechanically connected to the second connector 820 at the other end. Note that the wiring 830 does not need to include an electric wire and a resin member covering the surface thereof. The wiring 830 may be a bus bar or the like manufactured by pressing a metal flat plate.

<Case storage space>
As shown in FIG. 3, a board 700, a first connector 810, and a wiring 830 are housed in the housing space of the case 600. Although not shown, the case 600 also houses an inverter 300 and the like.

The substrate 700 has a first substrate surface 700a and a second substrate surface 700b that are aligned in the z direction. The substrate 700 is housed in the case 600 in such a manner that the second substrate surface 700b is aligned with the inner bottom surface 610a of the bottom portion 610.

The board 700 is connected to the case 600 via bolts (not shown). As described above, the first connector 810 is electrically and mechanically connected to the substrate 700.

A first connector 810 is connected to the first board surface 700a of the board 700. One end of a wiring 830 is connected to the first connector 810. The wiring 830, one end of which is connected to the first connector 810, extends toward the first wall 621 of the case 600.

The first wall 621 of the case 600 has an opening 625 that opens to an inner surface 620a and an outer surface 620b on the back side thereof. A peripheral edge portion 640 extending annularly is connected around the opening on the outer surface 620b side of the opening portion 625. The peripheral portion 640 is made of the same metal as the case 600. Note that the peripheral portion 640 may be formed of a high magnetic permeability material having higher magnetic permeability than air. The high magnetic permeability material forming the peripheral portion 640 corresponds to the second high magnetic permeability material. The peripheral portion 640 may be a separate member from the case 600.

The peripheral edge 640 extends away from the outer surface 620b of the first wall 621. The hollow portion of the peripheral portion 640 and the opening portion 625 are aligned in the x direction and communicate with each other. The above-mentioned second connector 820 is provided on the distal end surface 640a of the peripheral edge portion 640, which is spaced apart from the outer surface 620b. The other end of a wiring 830 extending toward the first wall portion 621 is connected to the second connector 820 .

For this purpose, a wiring 830 is connected between the first connector 810 and the second connector 820 through the opening 625 and the hollow portion of the peripheral edge 640. Power is supplied from an external power source 910 to the board 700 via the second connector 820, the wiring 830, and the first connector 810.

<Connection form to the periphery of the second connector>
As shown in FIGS. 3 and 4, the second coupling surface 821b of the base portion 821 of the second connector 820 is aligned with the distal end surface 640a of the peripheral portion 640 in the x direction. As described above, the base portion 821 is formed with the first fixing hole 823 that penetrates in the x direction.

A second fixing hole 645 is formed in the peripheral portion 640 and is recessed in the x direction from the distal end surface 640a. A threaded groove for fastening the shaft portion of the fixing bolt 840 is formed in the inner wall defining the second fixing hole 645 .

These first fixing holes 823 and second fixing holes 645 are lined up in communication in the x direction. The shaft portion of the fixing bolt 840 is inserted into this communication hole. The second connector 820 is fixed to the peripheral portion 640 by fastening the shaft portion to the second fixing hole 645 and the screw groove.

Note that a sealing material (not shown) is provided between the tip surface 640a and the second coupling surface 821b. Therefore, it is difficult for water or foreign matter to enter the storage space from the outside through the gap between the distal end surface 640a and the second coupling surface 821b.

Furthermore, as described above, the peripheral portion 640 extends away from the outer surface 620b of the first wall portion 621. Therefore, even if water or foreign matter enters the storage space from the outside, it is easy to prevent them from adhering to the substrate 700.

<Opening and substrate>
As described above, the first wall 621 of the case 600 is formed with an opening 625 that opens to the inner surface 620a and the outer surface 620b on the back side thereof. As shown in FIG. 5, the opening 625 includes a first opening surface 625a on the bottom 610 side of the first wall 621, a second opening surface 625b on the second wall 622 side, and a third opening on the lid 630 side. It is divided by a surface 625c and a fourth opening surface 625d on the fourth wall 624 side.

The length of the second opening surface 625b and the fourth opening surface 625d in the y direction is longer than the length of the first opening surface 625a and the third opening surface 625c in the z direction.

As described above, the substrate 700 is housed in the case 600 with the second substrate surface 700b aligned with the inner bottom surface 610a. As shown in FIGS. 3 and 5, the distance in the z direction between the inner bottom surface 610a and the second substrate surface 700b is longer than the distance in the z direction between the inner bottom surface 610a and the first opening surface 625a. The distance in the z direction between the inner bottom surface 610a and the first substrate surface 700a is shorter than the distance in the z direction between the inner bottom surface 610a and the third opening surface 625c.

The substrate 700 has a first substrate surface 700a and a second substrate surface 700b that are spaced apart from each other in the z direction, and also have a third substrate surface 700c and a fourth substrate surface 700d that are spaced apart from each other in the y direction. As shown in FIGS. 2 and 5, the distance in the y direction between the third substrate surface 700c and the fourth substrate surface 700d is greater than the distance in the y direction between the second opening surface 625b and the fourth opening surface 625d. It's getting longer.

For this purpose, a portion of the substrate 700 is located in the projection area of the opening 625 in the x direction. Specifically, the central portion of the substrate 700 in the y direction is located in the projection area of the opening 625 in the x direction. The end portion on the second wall portion 622 side in the y direction and the end portion on the fourth wall portion 624 side are lined up facing the first wall portion 621 in the x direction.

Further, as shown in FIGS. 3 and 5, a first connector 810 is provided on the first board surface 700a at the center of the board 700. For this purpose, the first connector 810 is located in the projection area of the opening 625 in the x direction.

Note that the entire first connector 810 does not need to be located in the projection area of the opening 625 in the x direction. A portion of the first connector 810 may be located in the projection area of the opening 625 in the x direction.

<periphery and opening>
As shown in FIG. 5, the peripheral edge 640 has a first edge 641 and a third edge 643 that are spaced apart from each other in the z direction, and a second edge 642 and a fourth edge 644 that are spaced apart from each other in the y direction.

Each of the first edge 641 to the fourth edge 644 is connected in an annular manner around the opening on the outer surface 620b side of the opening 625. The first edge 641 is connected to the first opening surface 625a side around this opening. The second edge 642 is connected to the second opening surface 625b side around this opening. The third edge 643 is connected to the third opening surface 625c side around this opening. The fourth edge 644 is connected to the fourth opening surface 625d side around this opening.

The inner edge surfaces of the hollow side of the peripheral edge 640 in the first edge 641 to the fourth edge 644 are flush with the first opening surface 625a to the fourth opening surface 625d, respectively.

Note that, as shown in FIG. 5, the distance between the second edge 642 and the fourth edge 644 in the y direction is longer than the distance between the first edge 641 and the third edge 643 in the z direction. There is.

The distance between the first edge 641 and the third edge 643 in the z direction is constant at any position where the peripheral edge 640 extends. The distance between the second edge 642 and the fourth edge 644 in the y direction is constant at any position where the peripheral edge 640 extends.

The cross-sectional area of the peripheral edge portion 640 on the first wall portion 621 side perpendicular to the x direction is the same as the cross-sectional area of the peripheral edge portion 640 on the side remote from the side portion 620 perpendicular to the x direction.

<Electromagnetic noise>
The power conversion device 500 described so far is mounted, for example, in the engine room of a vehicle. In addition to the power converter 500, an engine, a transaxle, and various electrical components are mounted in the engine room. The transaxle is a device that combines a motor 400, a power distribution mechanism, and a differential gear. Hereinafter, these electrical components stored in the engine room will be collectively referred to as electrical equipment. Electromagnetic noise is unintentionally radiated from these electrical devices.

Further, as described above, the second connector 820 is electrically connected to an external power source 910 (not shown). Power is supplied from this external power supply 910 to the board 700 via the second connector 820, the wiring 830, and the first connector 810. Therefore, electromagnetic noise is unintentionally input to the wiring 830 from the external power supply 910.

<Effect>
As described above, the wiring 830 is connected between the first connector 810 and the second connector 820 through the opening 625 and the hollow portion 640. A first connector 810 is connected to the board 700. A second connector 820 is connected to the peripheral portion 640.

A portion of the substrate 700 is located in the projection area of the opening 625 in the x direction. Therefore, the extension of the length of the wiring 830 passing through the opening 625 and the hollow part of the peripheral edge 640 is suppressed.

When current flows through the wiring 830, electromagnetic noise is generated from the wiring 830. As described above, the wiring 830 passes through the opening 625 and the hollow part 640. Therefore, electromagnetic noise generated from the wiring 830 easily passes through the peripheral portion 640.

As described above, the extension of the length of the wiring 830 is suppressed. Therefore, the section in which electromagnetic noise is generated from the wiring 830 is shortened. These make it difficult for electromagnetic noise generated from the wiring 830 to pass through the substrate 700.

A capacitor for processing noise is mounted on the board 700. Therefore, electromagnetic noise transmitted through the substrate 700 is easily passed through the capacitor. Electromagnetic noise is less likely to pass through the ECU 900 and IC chip mounted on the board 700.

As described above, the peripheral portion 640 is connected in an annular manner around the opening on the outer surface 620b side of the opening 625. The peripheral portion 640 and the opening 625 are lined up in a direction intersecting the x direction. This makes it easier for at least a portion of the opening 625 to be covered by the peripheral edge 640. Electromagnetic noise directed toward the opening 625 from electrical equipment outside the storage space is difficult to pass through the substrate 700.

As described above, the first connector 810 is provided at the center of the board 700. The first connector 810 is located in the x-direction in the projection area of the opening 625 in the x-direction. Therefore, extension of the length of the wiring 830 is easily suppressed. The section where electromagnetic noise is generated from the wiring 830 is shortened. Electromagnetic noise generated from the wiring 830 is difficult to pass through the substrate 700.

As explained above, the distance in the y direction between the third substrate surface 700c and the fourth substrate surface 700d is longer than the distance in the y direction between the second opening surface 625b and the fourth opening surface 625d. There is. Therefore, the end portion on the second wall portion 622 side in the y direction and the end portion on the fourth wall portion 624 side are lined up facing the first wall portion 621 in the x direction. This makes it easier to suppress transmission of electromagnetic noise from the electrical equipment to the end portion of the board 700. Electromagnetic noise is less likely to pass through the substrate 700.

(First modification)
As shown in FIG. 6, the substrate 700 has a fifth substrate surface 700e and a sixth substrate surface 700f, which connect the third substrate surface 700c and the fourth substrate surface 700d, in addition to the first substrate surface 700a to the fourth substrate surface 700d. . The fifth substrate surface 700e is located on the first wall portion 621 side. The sixth substrate surface 700f is located on the third wall portion 623 side.

As shown in FIG. 6, the distance between the fifth substrate surface 700e of the substrate 700 and the inner surface 620a of the first wall portion 621 may be shorter than the length of the peripheral portion 640 in the x direction.

In that case, the distance between the first connector 810 and the second connector 820 in the x direction becomes shorter. Accordingly, the extension of the length of the wiring 830 is easily suppressed. This makes it difficult for electromagnetic noise generated from the wiring 830 to pass through the substrate 700.

(Second modification)
As shown in FIG. 7, the distance between the fifth substrate surface 700e of the substrate 700 and the inner surface 620a of the first wall portion 621 may be longer than the length of the peripheral portion 640 in the x direction.

In that case, the distance between the second connector 820 and the board 700 in the x direction tends to become long. Electromagnetic noise generated in the electric circuit on the substrate 700 can easily pass through the case 600 and the peripheral part 640 before exiting from the opening on the tip side of the peripheral part 640 to the outside of the storage space. This makes it difficult for electromagnetic noise generated by the board 700 to leak out of the storage space.

(Third modification)
As shown in FIG. 8, when the configuration of the distal end side of the peripheral edge portion 640 is adjusted to the standard of the second connector 820, the distance between the first edge portion 641 and the third edge portion 643 in the z direction is equal to the distal end surface in the x direction. The length may become shorter from the 640a side toward the opening 625 side. Similarly, although not shown, when the configuration of the distal end side of the peripheral edge portion 640 is adjusted to the standard of the second connector 820, the distance between the second edge portion 642 and the fourth edge portion 644 in the y direction is determined from the distal end surface in the x direction. The length may become shorter from 640a toward the opening 625 side.

With the configuration of the distal end side of the peripheral edge part 640 in accordance with the standard of the second connector 820, the cross-sectional area of the peripheral edge part 640 perpendicular to the x direction on the first wall part 621 side is spaced apart from the side part 620 of the peripheral edge part 640. It is smaller than the cross-sectional area perpendicular to the x-direction on the side.

In this case, electromagnetic noise generated from an external electronic device passes through the second connector 820 and easily passes through the peripheral portion 640 before passing through the opening 625. This makes it difficult for electromagnetic noise generated from external electronic equipment to pass through the substrate 700.

Further, it becomes easier to suppress transmission of electromagnetic noise to the substrate 700 without changing the specifications of the second connector 820. It is possible to suppress an increase in the number of parts.

(Fourth modification)
In this embodiment, the board 700 is connected to the external power supply 910 via the first connector 810, the wiring 830, and the second connector 820. It may be connected to, etc. In that case, a plurality of first connectors 810 may be provided on the board 700. Accordingly, a plurality of wirings 830 may be provided. A plurality of wiring lines 830 may pass through each of the hollow portions of the opening portion 625 and the peripheral portion 640.

(Other variations)
In this embodiment, an example in which the inverter 300 is included in the power conversion device 500 is shown. However, power conversion device 500 may include a converter in addition to inverter 300.

In this embodiment, an example is shown in which the power conversion device 500 is included in the in-vehicle system 100 for an electric vehicle. However, the application of the power conversion device 500 is not particularly limited to the above example. For example, a configuration may be adopted in which the power converter 500 is included in a hybrid system including a motor 400 and an internal combustion engine.

In this embodiment, an example is shown in which one motor 400 is connected to the power conversion device 500. However, a configuration in which a plurality of motors 400 are connected to the power conversion device 500 may also be adopted. In this case, power conversion device 500 has a plurality of three-phase switch modules for configuring inverter 300.

600...case, 610...bottom, 620...side, 620a...inner surface, 620b...outer surface, 625...opening, 640...periphery, 700...board, 810...first connector, 820...second connector, 830...wiring , 910...External power supply

Claims (7)

a substrate (700);
a conductive member (830) connecting the substrate and an external power source (910);
a case (600) that stores the substrate and the conductive member in a storage space, the case (600) being made of a first high magnetic permeability material having higher magnetic permeability than air;
The case is formed with an opening (625) that opens to an inner surface (620a) that partitions a part of the storage space in a side portion (620) of the case and an outer surface (620b) on the back side thereof; A peripheral edge part (640) is formed that extends annularly around the outer surface side of the opening and stands up in the direction in which the inner surface side opening and the outer surface side opening of the opening are lined up,
The peripheral portion is formed of a second high magnetic permeability material having higher magnetic permeability than air,
At least a portion of the substrate is located in a projection area of the openings in the alignment direction,
In the power conversion device, the conductive member extends from the substrate housed in the housing space to the outside of the housing space through the hollows of the opening and the peripheral edge.
a first connector (810) provided on the substrate and connecting the substrate and the conductive member;
The power conversion device according to claim 1, further comprising a second connector (820) provided at a tip spaced apart from the outer surface of the peripheral portion and connecting the external power source and the conductive member.
The power conversion device according to claim 2, wherein at least a portion of the first connector is located in a projection area of the opening in the alignment direction.
The power conversion device according to claim 1, wherein a distance between the opening and the substrate is shorter than a length of the peripheral edge in the alignment direction.
The power conversion device according to any one of claims 1 to 3 , wherein a distance between the opening and the substrate is longer than a length of the peripheral edge in the alignment direction. A cross-sectional area of the hollow space on the outer surface side of the peripheral edge portion perpendicular to the alignment direction is smaller than a cross-sectional area of the hollow space on the tip side of the peripheral edge portion that is spaced from the outer surface and perpendicular to the alignment direction. 6. The power conversion device according to any one of 1 to 5.
The power conversion device according to any one of claims 1 to 6, wherein a part of the substrate is located in a projection area of the openings in the alignment direction.

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