JP2019187083A - Power conversion device - Google Patents

Abstract

To provide a power conversion device that easily prevents deformation of an electronic circuit board.SOLUTION: The power conversion device includes: an electronic circuit board 2; a connector 3 that is mounted on an upper surface of the electronic circuit board 2; and a support member 4 that supports the electronic circuit board 2 from the lower side of the electronic circuit board 2. At least part of the support member 4 has an overlapping part 40 arranged at a position overlapping the connector 3 in a vertical direction Z.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power conversion device.

  Vehicles such as electric vehicles and hybrid vehicles are equipped with a power conversion device that performs power conversion between DC power and AC power. Patent Document 1 discloses a power conversion device having a plurality of electronic circuit boards and stays arranged between the plurality of electronic circuit boards. In the power conversion device described in Patent Document 1, the stays are arranged along a pair of end edges constituting sides facing each other in the electronic circuit board in order to suppress deformation of the electronic circuit board.

JP 2009-159767 A

  A connector for electrically connecting the electronic circuit board and other electronic components may be mounted on the electronic circuit board. In this case, a force is applied from the connector to the electronic circuit board when the connector and the counterpart connector are connected.

  However, in the power conversion device described in Patent Document 1, the electronic circuit board is supported by the stay only at the edge thereof, and other regions are not supported by the stay. Therefore, when a connector is mounted on a portion of the electronic circuit board that is not supported by the stay, the electronic circuit board may be deformed by a force acting on the electronic circuit board when the connector is fitted.

  This invention is made | formed in view of this subject, and it is going to provide the power converter device which is easy to prevent a deformation | transformation of an electronic circuit board.

One aspect of the present invention is an electronic circuit board (2),
A connector (3) mounted on the upper surface of the electronic circuit board;
A support member (4) disposed under the electronic circuit board and supporting the electronic circuit board, wherein at least a part of the support member is disposed at a position overlapping the connector in the vertical direction (Z). The power converter (1) has the overlapped part (50).

  In the power conversion device of this aspect, at least a part of the support member has an overlapping portion arranged at a position overlapping the connector in the vertical direction. Therefore, even when a force is applied from the connector to the electronic circuit board side, the overlapping portion of the support member can suppress deformation of the electronic circuit board.

As mentioned above, according to the said aspect, the power converter device which is easy to prevent a deformation | transformation of an electronic circuit board can be provided.
In addition, the code | symbol in the parenthesis described in the means to solve a claim and a subject shows the correspondence with the specific means as described in embodiment mentioned later, and limits the technical scope of this invention. It is not a thing.

The side view of the power converter device in Embodiment 1. FIG. FIG. 3 is a plan view of a support member, an electronic circuit board, and a connector in the first embodiment. FIG. 3 is a schematic cross-sectional view showing a state in which the connector is fastened to the support member in the first embodiment. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 2. The top view of a supporting member, an electronic circuit board, and a connector in Embodiment 2. The top view of a supporting member, an electronic circuit board, and a connector in Embodiment 3.

(Embodiment 1)
An embodiment of a power conversion device will be described with reference to FIGS.
As shown in FIG. 1, the power conversion device 1 according to the present embodiment is arranged on an electronic circuit board 2, a connector 3 mounted on the upper surface of the electronic circuit board 2, and an electronic circuit board 2. 2 and a support member 4 that supports 2. As shown in FIGS. 2 and 3, at least a part of the support member 4 has an overlapping portion 40 arranged at a position overlapping the connector 3 in the vertical direction Z. Hereinafter, this embodiment will be described in detail.

  In the present specification, the thickness direction of the electronic circuit board 2 is referred to as the vertical direction Z. The side where the connector 3 is arranged with respect to the electronic circuit board 2 in the vertical direction Z is referred to as the upper side, and the opposite side is referred to as the lower side. The upper and lower expressions are for convenience, and do not limit the arrangement posture of the power conversion device 1 with respect to the vertical direction. One direction orthogonal to the vertical direction Z is referred to as a horizontal direction X, and a direction orthogonal to both the vertical direction Z and the horizontal direction X is referred to as a vertical direction Y. Moreover, in FIG. 2, the external position of each of the electronic circuit board 2 and the connector 3 is represented by a two-dot chain line.

  The power conversion device 1 of the present embodiment is mounted on, for example, an electric vehicle or a hybrid vehicle, and can be used as an inverter that converts power supply power to drive power necessary for driving a drive motor.

  As illustrated in FIG. 1, the power conversion device 1 includes a stacked unit 100 including a plurality of semiconductor modules 5 that constitute a power conversion circuit and a cooler 6 that cools the plurality of semiconductor modules 5. Each semiconductor module 5 has a main body 51 formed by resin-molding a semiconductor element such as a switching element such as IGBT or a diode such as FWD, and a control terminal 52 protruding upward from the main body 51. The control terminal 52 of each semiconductor module 5 is connected to a drive board 11 described later.

  In the cooler 6, a plurality of cooling pipes 61 for circulating the refrigerant in the vertical direction Y are stacked at a constant interval in the horizontal direction X, and both ends of the adjacent cooling pipes 61 in the vertical direction Y are connected by a connecting pipe 62. Is. And the main-body part 51 of the semiconductor module 5 is clamped between the adjacent cooling pipes 61. Thereby, the main-body part 51 of the semiconductor module 5 is cooled from both surfaces.

  The laminated unit 100 is accommodated in a case 7 having thermal conductivity. The case 7 is made of a metal such as aluminum. The case 7 has a front wall portion 71, a rear wall portion 72, and a bottom wall portion 73. The front wall portion 71 is in surface contact with the cooling pipe 61 disposed at one end portion in the lateral direction X in the laminated unit 100. Thereby, the cooler 6 is disposed in the case 7 so as to be in thermal contact with the case 7.

  The rear wall 72 is opposed to the cooling pipe 61 arranged at the end opposite to the front wall 71 in the lateral direction X in the laminated unit 100 with a predetermined interval in the lateral direction X. The bottom wall 73 is formed in a planar shape orthogonal to the vertical direction Z, and is connected to each of the lower end of the front wall 71 and the lower end of the rear wall 72. The bottom wall portion 73 is disposed so as to face the stacked unit 100 in the vertical direction Z.

  An elastic member 12 that is elastically deformable in the lateral direction X is disposed between the laminated unit 100 and the rear wall 72 in the case 7. The elastic member 12 is disposed between the stacked unit 100 and the rear wall 72 in a state compressed in the lateral direction X, and pressurizes the stacked unit 100 toward the front wall 71. Thereby, the contact area between each semiconductor module 5 and the cooling pipe 61 is ensured, and the cooling performance of the semiconductor module 5 is improved. In addition, the contact area between the cooling pipe 61 and the front wall 71 that are in surface contact with the front wall 71 in the laminated unit 100 is also ensured.

  The elastic member 12 can be a leaf spring made of, for example, a metal plate. By configuring the elastic member 12 from a member having thermal conductivity such as a metal, the rear wall portion 72 is in thermal contact with the cooling pipe 61 via the elastic member 12 to improve the cooling performance of the case 7. Can do.

  The support member 4 described above is disposed on the upper surfaces of the front wall portion 71 and the rear wall portion 72 in the case 7. The support member 4 is arranged so as to cover the laminated unit 100 accommodated in the case 7 from above.

  As shown in FIG. 2, the support member 4 has a frame body portion 41 and a beam portion 42. The frame body 41 has a rectangular frame shape that opens on both sides in the vertical direction Z. The frame body portion 41 has a short outer shape when viewed in the vertical direction Z in the vertical direction Y perpendicular to the vertical direction Z. The frame 41 has a rectangular shape whose outer shape when viewed in the vertical direction Z is long in the horizontal direction X. The frame part 41 extends in the horizontal direction X and faces a pair of long sides 421 that extend in the longitudinal direction Y, and a pair of short sides that extend in the lengthwise direction Y and face each other in the transverse direction X. 422.

  A pair of short side portions 422 of the frame body portion 41 is formed with a frame body flange 423 that protrudes toward the outside of the frame body portion 41 in the lateral direction X. The frame flange 423 is formed with a connector side insertion hole 424 for inserting a bolt for fixing the support member 4 to the case 7 described later. The support member 4 is fixed to the case 7 by being bolted to the case 7 described later at the frame flange 423. Further, board screw holes 425 for fastening the electronic circuit board 2 to the support member 4 by bolts are formed at the four corners of the frame body part 41 and at both sides of the beam part 42 in the longitudinal direction Y. The board screw hole 425 is a female screw that opens upward.

  Both ends of the beam portion 42 are connected to the frame body portion 41. That is, the beam portion 42 is connected to the frame body portion 41 in a so-called both-sided state. The beam portion 42 is connected to a pair of long side portions 421 facing the vertical direction Y in the frame body portion 41. The frame part is formed straight so as to extend in the vertical direction Y. The beam portion 42 is located in a region on one side in the horizontal direction X from the center in the horizontal direction X in the frame body portion 41.

  The support member 4 has an auxiliary member 43 connected to both the beam portion 42 and the frame body portion 41. That is, the auxiliary member 43 is connected to the beam portion 42 and the frame body portion 41 in a so-called both-sided state. The auxiliary member 43 extends from the short side portion 422 closest to the beam portion 42 among the short side portions 422 facing the beam portion 42 in the frame body portion 41. The beam portion 42 side from the branch portion 431 located in the central portion in the lateral direction X of the auxiliary member 43 has a pair of branch sides 432 branched from the branch portion 431 into two branches. An end portion of each branch side 432 opposite to the branch portion 431 is connected to the beam portion 42.

  The support member 4 has connector fastening portions 45 for fastening the connector 3 at three or more locations. The connector fastening portion 45 is a female screw that opens upward. In the present embodiment, the connector fastening portions 45 are formed at a total of three locations, two on the beam portion 42 and one on the auxiliary member 43. Each of the connector fastening portions 45 formed in the beam portion 42 is formed on an extension line of the branch side 432 in the beam portion 42. Further, the connector fastening portion 45 formed on the auxiliary member 43 is formed on the branch portion 431 of the pair of branch sides 432.

A portion connecting the frame body portion 41 and the connector fastening portion 45 in the support member 4 is formed so as to connect the frame body portion 41 and the connector fastening portion 45 with the shortest distance. That is, the part connecting the frame body part 41 and the connector fastening part 45 in the beam part 42 is formed along the shortest path among all the paths formed between the frame body part 41 and the connector fastening part 45. ing.

  The upper surfaces of all the connector fastening portions 45 of the support member 4 are formed on the same plane. The upper surfaces of all the connector fastening portions 45 are formed on a surface orthogonal to the vertical direction Z, and are formed in parallel with the lower surface of the electronic circuit board 2 disposed on the upper surface of the support member 4.

  The support member 4 has a reinforcing portion 44 formed so as to fill the inner space of the outer shape of the virtual figure formed by connecting all the connector fastening portions 45 with straight lines when viewed from the vertical direction Z. In the present embodiment, the reinforcing portion 44 is formed so as to fill an inner space of a triangular shape that connects the three connector fastening portions 45 with a straight line when viewed from the vertical direction Z.

  As shown in FIGS. 2 and 4, the reinforcing portion 44 is formed with ribs 441 for ensuring its strength. In the present embodiment, the rib 441 includes a pair of branch sides 432. The rib 441 is formed at the edge of the reinforcing portion 44 and is formed in a convex shape protruding upward.

  As shown in FIG. 2, at least a part of the beam portion 42 has an overlapping portion 40 disposed at a position overlapping the connector 3 in the vertical direction Z. In addition, at least a part of the auxiliary member 43 has an auxiliary overlapping portion 430 that constitutes the overlapping portion 40. Each of the overlapping portion 40 and the auxiliary overlapping portion 430 is in contact with each of the connector 3 and the electronic circuit board 2. For example, a slight gap may be formed between the overlapping portion 40 and the auxiliary overlapping portion 430 and the electronic circuit board 2. In this case, when the electronic circuit board 2 is pushed by the connector 3 and tries to bend, the electronic circuit board 2 is supported by the overlapping portion 40 or the auxiliary overlapping portion 430 without being greatly bent.

  In FIG. 2, the region inside the outer shape of the connector 3 in the beam portion 42 is the overlapping portion 40 other than the auxiliary overlapping portion 430, and the region inside the outer shape of the connector 3 in the auxiliary member 43 is the auxiliary overlapping portion 430. The beam portion 42 has an overlapping portion 40 around the two connector fastening portions 45 formed there. The auxiliary member 43 has an auxiliary overlapping portion 430 around the connector fastening portion 45 formed on the pair of branch sides 432 and the auxiliary member 43.

  As shown in FIG. 1, the electronic circuit board 2 is bolted to the upper surface of the support member 4, and the drive board 11 is bolted to the lower surface of the support member 4. That is, a pair of substrates is fixed to the support member 4 on both surfaces in the vertical direction Z. The drive substrate 11 fixed to the lower surface of the support member 4 is a substrate that has a drive circuit for switching the plurality of semiconductor modules 5 and is applied with a relatively high voltage. On the other hand, the electronic circuit board 2 is a board to which a relatively low voltage is applied while controlling the switching driving state based on various vehicle information.

  As shown in FIG. 2, the electronic circuit board 2 has a rectangular plate shape, and its edge is formed along the frame part 41 of the support member 4. As shown in FIG. 3, in the electronic circuit board 2, a board side insertion hole 21 is formed at a position overlapping with the connector fastening portion 45 formed in the support member 4 in the vertical direction Z. The electronic circuit board 2 is supported by the support member 4 by inserting the bolt B into the board side insertion hole 21 and screwing into the board screw hole 425.

  As shown in FIGS. 1 and 3, the connector 3 is mounted on the upper surface of the electronic circuit board 2. The connector 3 is connected to an external control device such as an ECU. As shown in FIG. 3, the connector 3 is configured to open upward and a mating connector (not shown) connected to the connector 3 is connected from the upper side to the lower side of the connector 3. That is, the connector 3 and the mating connector are configured to be fitted in the vertical direction Z.

  As shown in FIGS. 1 and 3, a connector flange 31 protruding in the lateral direction X is formed at the lower end portion of the connector 3. The connector flange 31 is formed at a position overlapping the connector fastening portion 45 in the vertical direction Z. The connector flange 31 has a connector side insertion hole 311 through which the bolt B is inserted. The connector 3 is fixed to the support member 4 by inserting the bolt B into the connector side insertion hole 311 of the connector flange 31 and the board side insertion hole 21 of the electronic circuit board 2 and screwing it into the connector fastening portion 45. Yes. Thereby, a part of the electronic circuit board 2 is located between the connector 3 and the support member 4.

  As shown in FIGS. 1 and 3, the connector 3 is provided with a shaft seal 32 from the outer periphery. As shown in FIG. 3, the shaft seal 32 is for watertightness between the connector 3 in the radial direction perpendicular to the vertical direction Z and other components. In the present embodiment, the shaft seal 32 seals between the inner peripheral surface of the opening 101 formed in the cover 10 of the power conversion device 1 and the outer peripheral surface of the connector 3.

  As shown in FIG. 2, when viewed from the vertical direction Z, the center of the shaft seal 32 is located inside the outer shape of the virtual figure formed by connecting all the connector fastening portions 45 with straight lines. When viewed from the vertical direction Z, the center of the shaft seal 32 is located at a position overlapping the reinforcing portion 44.

Next, the effect of this embodiment is demonstrated.
In the power conversion device 1 of the present embodiment, at least a part of the support member 4 has an overlapping portion 40 arranged at a position overlapping the connector 3 in the vertical direction Z. Therefore, even when a force is applied from the connector 3 to the electronic circuit board 2 side, the overlapping portion 40 of the support member 4 can suppress deformation of the electronic circuit board 2.

  In addition, the connector 3 is configured to open toward the upper side, and a mating connector connected to the connector 3 is connected from the upper side to the lower side of the connector 3. Therefore, when the mating connector is fitted to the connector 3, the force is more easily applied from the connector 3 to the electronic circuit board 2 side. However, in the present embodiment, the support member 4 overlaps as described above. Since the portion 40 is provided, the deformation of the electronic circuit board 2 can be effectively suppressed.

  The support member 4 includes a frame body portion 41 that opens on both sides in the vertical direction Z, and a beam portion 42 that is connected to the frame body portion 41 at both ends and has an overlapping portion 40 at least partially. In other words, the overlapping portion 40 is formed in the beam portion 42 connected to the frame body portion 41 in a so-called both-sided state. Therefore, the rigidity of the entire support member 4 can be increased. Therefore, even if the beam portion 42 receives a force acting from the connector 3 toward the electronic circuit board 2, the beam portion 42 can be prevented from being bent.

  In addition, the frame body 41 has an outer shape as viewed in the vertical direction Z that is short in the vertical direction Y, and the beam 42 is formed to extend in the vertical direction Y. Therefore, it is easy to shorten the length of the beam portion 42. Also by this, the strength of the beam portion 42 can be secured, and it is easy to prevent the beam portion 42 from being bent by a force acting from the connector 3 to the electronic circuit board 2 side. Further, it is possible to reduce the weight of the beam portion 42 and reduce the material cost of the beam portion 42 while ensuring the rigidity of the beam portion 42. Moreover, the shortening of the beam portion 42 facilitates the handling thereof, leading to an improvement in the productivity of the support member 4.

  The support member 4 has an auxiliary member 43 connected to both the beam portion 42 and the frame body portion 41, and at least a part of the auxiliary member 43 has an auxiliary overlapping portion 430 constituting the overlapping portion 40. . Thus, in addition to the overlapping portion 40 formed on the beam portion 42, the auxiliary overlapping portion 430 formed on the auxiliary member 43 can receive a force acting from the connector 3 side, so that the electronic circuit is further connected from the connector 3 to one layer. The durability of the support member 4 against the force acting on the substrate 2 side can be improved.

  Further, when viewed from the vertical direction Z, the beam portion 42 is arranged at a position shifted from the center of the frame body portion 41, and the auxiliary member 43 is a part of the frame body portion 41 facing the beam portion 42. , Extending from the portion closest to the beam portion 42. Therefore, it is easy to shorten the length of the auxiliary member 43. Thereby, the strength of the auxiliary member 43 can be secured. Therefore, it is easy to prevent the auxiliary member 43 from being bent, and it is easy to ensure the rigidity of the entire support member 4.

  Further, the support member 4 has a connector fastening portion 45 for fastening the connector 3. Therefore, the force acting on the electronic circuit board 2 side from the connector 3 is reliably received by the connector fastening portion 45 of the support member 4. Therefore, it is easy to suppress deformation of the electronic circuit board 2.

  Further, the portion of the beam portion 42 that connects the frame body portion 41 and the connector fastening portion 45 is formed so as to connect the frame body portion 41 and the connector fastening portion 45 with the shortest distance. Therefore, it is possible to shorten the distance from the connector fastening portion 45 that is easily subjected to a load from the connector 3 side in the beam portion 42 to the beam portion 42. Also by this, it is easy to prevent the beam portion 42 from being bent by the force acting from the connector 3 side. Further, the beam portion 42 can be reduced in weight by shortening the beam portion 42. Furthermore, by shortening the distance from the connector fastening portion 45 to the frame body portion 41 in the beam portion 42, it is easy to suppress the application of the thermal stress to the connector 3 connected to the connector fastening portion 45. That is, since the thermal expansion or thermal contraction of the part from the connector fastening part 45 to the frame body part 41 in the beam part 42 accompanying the change in heat can be reduced, the connector 3 connected to the connector fastening part 45 is Hard to get cold stress.

  The support member 4 has connector fastening portions 45 at three or more locations. Therefore, since the force acting on the electronic circuit board 2 side from the connector 3 can be distributed and received by the three or more connector fastening portions 45, it is easy to prevent the deformation of the electronic circuit board 2 and the support member 4. . Further, by fixing the connector 3 to the connector fastening portion 45 of the support member 4 at three or more locations, the connector 3 can be easily fastened to the support member 4 stably.

  When viewed in the vertical direction Z, the center of the shaft seal 32 is located inside the outer shape of the virtual figure formed by connecting all the connector fastening portions 45 with straight lines. Therefore, the force acting on the electronic circuit board 2 side from the connector 3 is equally applied to the plurality of connector fastening portions 45 when fitting to the seal. This also makes it easy to prevent the support member 4 from being deformed by the force from the connector 3 side.

  A part of the electronic circuit board 2 is located between the connector 3 and the support member 4, and the upper surfaces of all the connector fastening portions 45 of the support member 4 are formed on the same plane. Therefore, the electronic circuit board 2 is stably fixed to the upper surface of the connector fastening portion 45 formed on the same plane. On the other hand, when the positions of the upper surfaces of the plurality of connector fastening portions 45 are shifted in the vertical direction Z, a torsional stress is generated in the electronic circuit board 2 or the electronic circuit board 2 is rotated and difficult to position.

  Further, the support member 4 has a reinforcing portion 44 formed so as to fill the inner space of the outer shape of the virtual figure formed by connecting all the connector fastening portions 45 with straight lines when viewed from the vertical direction Z. That is, a part of the support member 4 is formed at a portion where the force acting from the connector 3 is easily concentrated. Therefore, the rigidity of the portion where the force acting from the connector 3 in the support member 4 tends to concentrate can be increased.

  In addition, ribs 441 are formed on the reinforcing portion 44. Therefore, it is easier to secure the strength of the reinforcing portion 44. Furthermore, since the surface area of the reinforcing portion 44 disposed in the vicinity of the connector 3 can be secured, the heat received from the connector 3 can be easily radiated.

  The power conversion device 1 further includes a case 7 having thermal conductivity, and a cooler 6 disposed in the case 7 so as to be in thermal contact with the case 7, and the support member 4 is fixed to the case 7. Has been. Therefore, the heat of the connector 3 can be radiated to the cooler 6 via the support member 4 and the case 7.

  As described above, according to the present embodiment, it is possible to provide the power converter 1 that can easily prevent the deformation of the electronic circuit board 2.

(Embodiment 2)
As shown in FIG. 5, the present embodiment is an embodiment in which the shapes of the connector 3 and the support member 4 are changed with respect to the first embodiment.

  In the present embodiment, the support member 4 is not formed with an auxiliary member (see reference numeral 43 in FIG. 2 or the like) and a reinforcing portion (see reference numeral 44 in FIG. 2 or the like). One connector fastening portion 45 is formed at the central portion in the longitudinal direction of the beam portion 42. Further, the connector 3 is arranged so as to overlap the beam portion 42 in the vertical direction Z, and for inserting a bolt for fastening the connector 3 to the support member 4 in the center when viewed from the vertical direction Z. A connector side insertion hole (not shown) is provided.

Others are the same as in the first embodiment.
Of the reference numerals used in the second and subsequent embodiments, the same reference numerals as those used in the above-described embodiments represent the same components as those in the above-described embodiments unless otherwise indicated.

  Also in the present embodiment, the same effects as those of the first embodiment are obtained by the configuration common to the first embodiment.

(Embodiment 3)
As shown in FIG. 6, the present embodiment is an embodiment in which the reinforcing portion (see reference numeral 44 in FIG. 2) is eliminated from the first embodiment.

The auxiliary member 43 is connected to the central portion in the longitudinal direction Y of the beam portion 42 and the central portion in the longitudinal direction Y of the short side portion 422 closer to the beam portion 42 of the pair of short side portions 422. Yes. The auxiliary member 43 is formed straight in the vertical direction Y.
Others are the same as in the first embodiment.

  Also in the present embodiment, the same effects as those of the first embodiment are obtained due to the configuration common to the first embodiment.

  The present invention is not limited to the embodiments described above, and can be applied to various embodiments without departing from the scope of the invention. For example, in each of the above embodiments, one beam member is used, but a plurality of beam members may be formed. In Embodiments 1 and 3, the number of auxiliary members is one, but a plurality of auxiliary members may be formed. Further, in each of the above embodiments, the frame body portion has shown an example in which the outer shape viewed from the vertical direction Z is a rectangular shape, but is not limited thereto, and as a different shape such as a circle, an ellipse, a polygon, etc. Also good.

DESCRIPTION OF SYMBOLS 1 Power converter 2 Electronic circuit board 3 Connector 4 Support member 40 Overlapping part Z Vertical direction

Claims (14)

An electronic circuit board (2);
A connector (3) mounted on the upper surface of the electronic circuit board;
A support member (4) disposed under the electronic circuit board and supporting the electronic circuit board, wherein at least a part of the support member is disposed at a position overlapping the connector in the vertical direction (Z). Power converter (1) having an overlapped portion (40).   The power converter according to claim 1, wherein the connector opens toward the upper side and is configured such that a counterpart connector connected to the connector is connected from the upper side to the lower side of the connector.   The support member includes a frame body portion (41) that is open on both sides in the vertical direction, and a beam portion (42) that is connected to the frame body portion at both ends and has the overlapping portion at least in part. The power conversion device according to claim 1 or 2.   The external shape when the said frame body part is seen from an up-down direction is short in one direction (Y), The said beam part is formed so that it may extend in the said one direction. Power conversion device.   The support member includes an auxiliary member (43) connected to both the beam portion and the frame body portion, and at least a part of the auxiliary member forms an auxiliary overlapping portion (430) constituting the overlapping portion. The power converter according to claim 3 or 4 which has.   When viewed from above and below, the beam portion is disposed at a position shifted from the center of the frame body portion, and the auxiliary member is the beam of the portion of the frame body portion that faces the beam portion. The power conversion device according to claim 5, wherein the power conversion device extends from a portion closest to the portion.   The power converter according to any one of claims 1 to 6, wherein the support member includes a connector fastening portion (45) for fastening the connector. The support member includes a frame body portion (41) that is open on both sides in the vertical direction, and a beam portion (42) that is connected to the frame body portion at both ends and has the overlapping portion at least partially. And
The power converter according to claim 7, wherein a portion of the support member that connects the frame body portion and the connector fastening portion is formed to connect the frame body portion and the connector fastening portion at a shortest distance. .   The power converter according to claim 7 or 8, wherein the support member has the connector fastening portion at three or more locations.   The connector is provided with a shaft seal (32) for watertightness with other parts in the radial direction orthogonal to the vertical direction, and when viewed from the vertical direction, all the connector fastening portions are straight. The power conversion device according to claim 9, wherein a center of the shaft seal is located inside an outer shape of a virtual figure formed by connecting.   The part of the electronic circuit board is located between the connector and the support member, and the upper surfaces of all the connector fastening portions of the support member are formed on the same plane. Or the power converter device of 10.   The said support member has a reinforcement part (44) formed so that the inner space of the external shape of the virtual figure which connects all the said connector fastening parts with a straight line when it sees from an up-down direction may be filled. 11. The power conversion device according to claim 11.   The power converter according to claim 12, wherein a rib (441) is formed in the reinforcing portion.   The power converter further includes a case (7) having thermal conductivity, and a cooler (6) disposed in the case so as to be in thermal contact with the case, and the support member includes the case The power conversion device according to any one of claims 1 to 13, wherein the power conversion device is fixed to the power.

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