JP6121890B2 - Power conversion device for vehicle and railway vehicle - Google Patents

Description

  Embodiments described herein relate generally to a vehicle power converter and a railway vehicle.

In general railway vehicles, a vehicle power conversion device is provided, for example, under a vehicle body floor as a device for controlling a driving main motor in the railway vehicle.
2. Description of the Related Art Conventionally, a vehicular power conversion device is installed under a floor of a vehicle body and has a control box in which the inside is a sealed space, and a power unit unit housed in the control box (power conversion using a switching operation of a semiconductor element). And a heat radiating part attached to the control box in a state opened to the outside of the control box and radiating heat generated in the power unit part.

  As this type of vehicle power conversion device, for example, the power unit portion and the heat radiating portion are integrated, and the power unit portion is arranged so that the fins constituting the heat radiating portion protrude through the bottom wall of the control box and protrude downward. Those installed on the bottom wall of the control box are known.

  However, in the conventional vehicle power conversion device, the power unit portion and the heat radiating portion are integrated, so when removing the power unit portion including the semiconductor element for maintenance, for example, it is necessary to remove the heat radiating portion at the same time, There was room for improvement in detachability operability. In particular, when the power unit is installed on the bottom wall of the control box, it is difficult to easily perform the operation because it is necessary to lift the heavy power unit in the vertical direction.

Even if the power unit part and the heat radiating part are configured to be separable, there is no change in lifting the heavy power unit part in the vertical direction, so there is still room for improvement in detachability operability. It was.
Furthermore, when the power unit part and the heat radiating part are configured to be separable, it is generally necessary to take measures to interpose a packing between the power unit part and the heat radiating part. The problem which becomes complicated will also arise.

JP 2013-154758 A

  The problem to be solved by the present invention is to provide a vehicular power conversion device and a railway vehicle that can obtain stable cooling performance and have improved detachability operability of the power conversion unit.

  The power conversion device for a vehicle according to the embodiment is generated by the power conversion unit that is fixed to the lower surface of the box having a bottom wall, a power conversion unit housed in the box, and the bottom wall. A heat dissipating unit that dissipates heat outside the box, a support rail that is placed on the top surface of the bottom wall portion and supports the power conversion unit so as to be slidable, and stands on the top surface of the bottom wall portion. A guide member which is provided and guides the support rail so as to be movable in the vertical direction, and can be fixed in a state where the power conversion unit is pressed against the upper surface of the bottom wall portion via the support rail. And a fixing member that can fix the support rail spaced apart from the bottom wall portion at an arbitrary height.

  The railway vehicle according to the embodiment has a vehicle body on which the vehicle power conversion device is attached under the floor.

It is a figure showing a rail car of an embodiment. It is a block diagram of the power converter device for vehicles shown in FIG. 1, Comprising: It is a perspective view in the state seen from the left side of the rail vehicle. It is a disassembled perspective view of the vehicle power converter device shown in FIG. It is AA sectional drawing of the power converter device for vehicles shown in FIG. FIG. 3 is a top view of the vehicle power conversion device shown in FIG. 2. It is a figure which shows the state which lifted the power conversion unit from the state shown in FIG.

Hereinafter, a power converter for vehicles and a railway vehicle of an embodiment are explained with reference to drawings.
The configuration of the railway vehicle will be described.
As shown in FIG. 1, the railway vehicle 1 of the present embodiment includes a vehicle body 2 and a vehicle power conversion device 3 installed under the floor of the vehicle body 2.
The vehicular power conversion device 3 converts DC power supplied from the overhead line 4 through the pantograph 5 or DC power supplied from a power supply source (not shown) into AC power, for example, the left and right wheels 6 are pivotally supported. The apparatus is configured to supply AC power to the vehicle main motor 8 attached to the carriage 7 and each electric equipment (air conditioner, etc.) (not shown) in the railway vehicle 1. The wheels 6 travel on a track installed on the ground (not shown).

  In the present embodiment, the direction connecting the front and rear of the vehicle body 2 is referred to as “front-rear direction L1”, the vehicle width direction of the vehicle body 2 is referred to as “left-right direction L2”, and the height direction of the vehicle body 2 is referred to as “vertical direction L3”. Further, the right side of the vehicle body 2 with respect to the traveling direction is referred to as “right vehicle side R”, and the left side of the vehicle body 2 with respect to the traveling direction is referred to as “left vehicle side L”.

The configuration of the vehicle power conversion device will be described.
As shown in FIGS. 2 and 3, the vehicle power conversion device 3 includes a box (control box) 10 attached under the floor of the vehicle body 2, a power conversion unit 20 accommodated in the box 10, A pair of support rails 30 that slidably support the power conversion unit 20, a screw rod (guide member) 40 that guides the support rail 30 so as to be movable in the vertical direction L3, and a nut (fixing member) that fixes the support rail 30 ) 41 and a heat dissipating unit 50 attached to the outside of the box 10.

  The box 10 includes a top wall portion 11 facing the lower floor of the vehicle body 2, a bottom wall portion 12 facing the track side (not shown), and four side wall portions 13 facing the front-rear direction L1 and the left-right direction L2. And a metal box surrounded by these wall portions (the top wall portion 11, the bottom wall portion 12, and the four side wall portions 13) in a rectangular parallelepiped shape.

The box 10 is attached so as to be suspended under the floor of the vehicle body 2 via a plurality of attachment pieces (suspending ears) 14 attached to the top wall 11. Specifically, the box body 10 is attached, for example, under the floor near the left vehicle side L so as to be within an outfitting limit (not shown). For example, in the railway field, the outfit limit is a restriction on equipment installed under the floor of the vehicle body, and is defined as the upper, lower, left, and right limits that should not protrude any part of the installed equipment.
In addition, the attachment piece 14 is formed so that it may protrude toward the outer side of the left-right direction L2 from the four corners in the top wall part 11. FIG. However, the attachment position of the box 10 and the number of attachment pieces 14 are not limited to the above case, and may be changed as appropriate.

Of the four side wall portions 13 in the box body 10, the side wall portion 13 of the box body 10 facing the left side L is formed with an opening 15 for taking in and out the power conversion unit 20 accommodated in the inside of the box body 10. Has been. Normally, the opening 15 is closed by a cover (not shown).
An opening 16 having a rectangular shape in plan view that is longer in the left-right direction L2 than in the front-rear direction L1 is formed in the bottom wall 12 of the box 10. The power conversion unit 20 and the heat dissipation unit 50 are arranged so as to face each other with the opening 16 interposed therebetween.

  In addition, inside the box 10, not only the power conversion unit 20, but also various other power conversion devices (not shown) (for example, filter capacitors, gate amplifiers, etc.) and various types (not shown) necessary for running the railway vehicle 1. The device may be accommodated.

The heat dissipation unit 50 will be described in detail.
The heat radiating unit 50 is a unit that radiates heat generated in the power conversion unit 20 outside the box body 10, and includes a heat radiating plate 51 and a plurality of cooling fins 52 formed integrally with the heat radiating plate 51. It has.

As shown in FIG. 2 to FIG. 4, the heat radiating plate 51 is formed in a rectangular shape in a plan view that is longer in the left-right direction L2 than in the front-rear direction L1 by a metal material excellent in thermal conductivity (for example, aluminum). The size is larger than the opening 16 formed in the bottom wall 12 of the box 10. And this heat sink 51 is attached to the lower surface of the bottom wall part 12 of the box 10 so that the opening part 16 may be block | closed from the downward direction.
At this time, the heat radiating plate 51 may be fixed by a general fastening means using screws, bolts, or the like, or may be fixed by welding, adhesion, or the like.

  In addition, the opening periphery in the opening part 16 is sealed over the perimeter by the sealing material 17 (refer FIG. 4). Thereby, the clearance gap between the opening periphery of the opening part 16 and the heat sink 51 is sealed reliably, and the airtightness inside the box 10 is ensured.

The cooling fins 52 are plate-like fins that are formed long in the front-rear direction L <b> 1, which is the traveling direction of the vehicle body 2, using a metal material that is excellent in thermal conductivity, like the heat radiating plate 51. The cooling fins 52 are arranged perpendicular to the heat radiating plate 51 so as to protrude downward from the heat radiating plate 51, and are arranged in parallel in the left-right direction L2 with a certain interval. Yes. Thereby, when the vehicle body 2 is traveling, the traveling wind easily passes between the cooling fins 52.
The plurality of cooling fins 52 may be integrally attached to the heat radiating plate 51 by, for example, caulking or brazing, or may be integrally attached by other methods. .

Next, the power conversion unit 20 will be described in detail.
As shown in FIGS. 2 to 5, the power conversion unit 20 is housed inside the box body 10 while being placed on the heat dissipation unit 50 through the opening 16 formed in the bottom wall portion 12. Yes. Specifically, the heat conductive sheet 45 is placed on the upper surface of the heat radiating plate 51 in the heat radiating unit 50 with the heat conductive sheet 45 interposed therebetween.

  The power conversion unit 20 includes a heat receiving plate 21 that is slidably supported in a left-right direction L2 by a pair of support rails 30, a plurality of semiconductor elements 22 attached to the heat receiving plate 21, and an illustration of each semiconductor element 22. A conductor (not shown) that forms a predetermined power conversion circuit pattern by conducting to a terminal portion that is not connected, a smoothing capacitor 23, and a gate substrate 24.

  The heat receiving plate 21 is formed in a rectangular shape in plan view, which is longer in the left-right direction L2 than in the front-rear direction L1, by a metal material having excellent thermal conductivity like the heat radiating plate 51. The size of the heat receiving plate 21 is slightly smaller than the opening 16 formed in the bottom wall portion 12. Accordingly, the entire lower surface or substantially the entire lower surface of the heat receiving plate 21 is placed on the upper surface of the heat radiating plate 51 with the heat conductive sheet 45 interposed therebetween.

In the heat receiving plate 21, a guide groove 25 is formed in each of a pair of side edge portions (a pair of side edge portions extending along the slide direction) 21A (see FIG. 3) facing in the front-rear direction L1.
The guide groove 25 is a groove that is recessed in a square shape toward the inside of the heat receiving plate 21 in a side view as viewed from the left-right direction L2, and is formed over the entire length of the side edge portion 21A along the left-right direction L2. Yes. Therefore, the guide groove 25 is opened toward the left vehicle side L and the right vehicle side R.

  The guide groove 25 is formed in an intermediate portion in the thickness direction of the heat receiving plate 21 and is not opened upward and downward. Therefore, an upper flange 21a and a lower flange 21b that face each other in the vertical direction L3 across the guide groove 25 are formed on the pair of side edge portions 21A of the heat receiving plate 21 (see FIG. 3).

In addition, two handles 26 are attached to the side edge portion 21B facing the left vehicle side L of the heat receiving plate 21 so as to be arranged at intervals in the front-rear direction L1. Thus, for example, the power conversion unit 20 can be attached / detached and carried while holding the handle 26.
However, the handle 26 is not essential and may not be provided. Moreover, when attaching the handle 26, the number of the handles 26 is not limited to two.

The plurality of semiconductor elements 22 are elements that perform power conversion by being switched by turning on / off a gate amplifier (not shown), and are attached to the upper surface of the heat receiving plate 21.
In the example shown in the figure, a total of six semiconductor elements 22 are attached to the heat receiving plate 21 in a state where three semiconductor elements 22 are arranged at intervals in the front-rear direction L1 and two are arranged at intervals in the left-right direction L2. However, the number of semiconductor elements 22 is not limited to this case.

  A frame frame 27 is attached to the upper surface of the heat receiving plate 21 so as to surround the plurality of semiconductor elements 22. The frame frame 27 has four wall portions facing in the front-rear direction L1 and the left-right direction L2, and is formed in a square shape in plan view that opens upward.

The smoothing capacitor 23 and the gate substrate 24 are attached to the frame frame 27.
Specifically, the smoothing capacitor 23 is fixed in a state of being accommodated inside the frame frame 27 and is positioned above the plurality of semiconductor elements 22. The gate substrate 24 is attached to the upper part on the outer surface side of the wall portion facing the left vehicle side L among the wall portions of the frame frame 27.
In addition, the lower side of the wall portion to which the gate substrate 24 is attached is open, and for example, it is possible to access the plurality of semiconductor elements 22 from the outside of the frame frame 27 without removing the smoothing capacitor 23. Has been.

The power conversion unit 20 configured as described above is placed on the upper surface of the heat radiating plate 51 with the heat conductive sheet 45 interposed therebetween, as described above.
As shown in FIG. 4, the heat conductive sheet 45 is a sheet having high heat conductivity by mixing a heat conductor (not shown) such as a metal filler inside, and having excellent flexibility and adhesion. Has been. Moreover, in the heat conductive sheet 45, the heat conductor is oriented in the thickness direction, and has higher heat conductivity in the thickness direction than in the plane direction.

  In addition, the heat conductive sheet 45 is formed in a rectangular shape in plan view having the same size as the heat receiving plate 21, and is in contact with the entire lower surface of the heat receiving plate 21. The heat conductive sheet 45 is composed of a sheet body 45a and a non-adhesive layer (for example, a layer made of aluminum) 45b. The non-adhesive layer 45b is disposed on the heat receiving plate 21 side. The sheet main body 45a has a slight adhesiveness, and can be temporarily fixed to the upper surface of the heat radiating plate 51 by adhesion.

As shown in FIGS. 2 to 5, the pair of support rails 30 are formed longer in the left-right direction L <b> 2 than the heat receiving plate 21, and are arranged in parallel in the front-rear direction L <b> 1 with the heat receiving plate 21 interposed therebetween. It is placed on the upper surface of the bottom wall portion 12 of the box 10.
At this time, each support rail 30 is arranged at a position where the first end portion 30A located in the left vehicle side L direction is substantially flush with the side edge portion 21B of the heat receiving plate 21 to which the handle 26 is attached. And the 2nd end part (end part located in the direction opposite to the 1st end part 30A in the longitudinal direction) 30B located in the right-car side R direction is further separated in the right-car side R direction rather than the heat receiving plate 21. It is mounted on the upper surface of the bottom wall portion 12 so as to be positioned.

On the side of the heat receiving plate 21 of each support rail 30, a recess formed so as to be recessed from the upper surface has the same length as the guide groove 25 of the heat receiving plate 21 from the first end 30 </ b> A to the second end 30 </ b> B. Is formed. As a result, the support rail 30 is formed to be thinner than other portions of the support rail 30 and can enter the guide groove 25 of the heat receiving plate 21 to slide the heat receiving plate 21 along the left-right direction L2. A rail portion 31 is formed to be supported.
That is, the pair of support rails 30 supports the heat receiving plate 21 from the front-rear direction L <b> 1 via the rail portions 31.

  Therefore, it is possible to remove the heat receiving plate 21 from the support rail 30 in the left vehicle side L direction by sliding movement, and conversely, by sliding the removed heat receiving plate 21 from the left vehicle side L direction. The support rail 30 can be supported again.

  In addition, the wall surface facing the left vehicle side L direction among the wall surfaces of a recessed part functions as the stopper wall 32 with which the upper flange 21a in the heat receiving plate 21 contacts. Thereby, it is possible to restrict the heat receiving plate 21 from sliding over the stopper wall 32 in the right vehicle side R direction, and the heat receiving plate 21 can be positioned in the sliding direction.

Further, a guide hole 33 that penetrates the support rail 30 in the vertical direction L3 is formed on the first end 30A side of the support rail 30.
As shown in FIG. 3, the guide hole 33 is formed in an elliptical shape in plan view that is long in the left-right direction L2. Further, the support rail 30 is formed with a storage chamber 34 that communicates with the guide hole 33 and that opens in the left vehicle side L direction. A nut 41 screwed into the screw rod 40 is housed in the housing chamber 34.

As shown in FIGS. 2, 3, and 5, the pair of support rails 30 configured as described above are connected via a connection bar (connection member) 35 fixed to the upper surface of the bottom wall portion 12 of the box 10. Are connected to each other.
The connecting bar 35 is a long member extending along the front-rear direction L <b> 1, and is fixed to the upper surface of the bottom wall portion 12 in a state of being positioned in the R direction on the right side of the pair of support rails 30. At this time, the connecting bar 35 may be fixed to the upper surface of the bottom wall portion 12 by general fastening means such as screws and bolts (not shown), welding, adhesion, or the like.

And the connection bar 35 and the 2nd end part 30B of each support rail 30 are mutually connected via the hinge part 36 by which the rotating shaft M is arrange | positioned along the front-back direction L1. Each support rail 30 is movable in the vertical direction L3 by rotating around the hinge portion 36 (centering on the rotation axis M). In the illustrated example, a hinge is exemplified as the hinge portion 36, but the hinge portion 36 is not limited to this case, and may be a thin hinge piece, for example.
In particular, each support rail 30 is rotated so that the first end 30 </ b> A greatly moves in the vertical direction L <b> 3 while being guided by the screw rod 40.

As shown in FIGS. 2 to 5, the screw rod 40 is a cylindrical rod having a threaded portion formed on the outer peripheral surface, and is erected on the upper surface of the bottom wall portion 12 of the box 10 by, for example, welding or the like. Yes. In the illustrated example, the threaded portion is formed over the entire length from the proximal end portion to the distal end portion of the threaded rod 40.
The screw rod 40 is disposed on the first end 30A side of the pair of support rails 30 and is inserted into the guide hole 33 so as to penetrate the support rail 30 from below. At this time, the length of the screw rod 40 is set to such a length that the tip end portion of the screw rod 40 protrudes greatly above the support rail 30.

  Further, as described above, since the guide hole 33 is formed in an elliptical shape in plan view that is long in the left-right direction L2, a gap is secured in the left-right direction L2 between the screw rod 40 and the guide hole 33. (See FIG. 5). The clearance allows the support rail 30 to rotate around the hinge portion 36 with the screw rod 40 still inserted into the guide hole 33. That is, the pair of support rails 30 are rotatable around the hinge portion 36 along the screw rod 40.

  The nut 41 is accommodated in an accommodation chamber 34 formed in the support rail 30 in a state of being screwed to the screw rod 40. Accordingly, the support rail 30 can be pushed up or down through the nut 41 by rotating the nut 41 and moving it up and down along the screw rod 40.

In particular, by moving the nut 41 downward along the screw rod 40, the heat receiving plate 21 of the power conversion unit 20 is interposed via the support rail 30, and the heat radiating plate 51 of the heat radiating unit 50 with the heat conductive sheet 45 interposed therebetween. It is possible to press against. As a result, the power conversion unit 20 is housed in a state in which sliding movement is restricted and is stably fixed inside the box 10.
Further, by moving the nut 41 upward along the screw rod 40, the pair of support rails 30 can be rotated upward about the hinge portion 36. Therefore, the pressing of the power conversion unit 20 can be released, and the support rail 30 spaced from the bottom wall portion 12 along the screw rod 40 can be fixed at an arbitrary height.

Next, the operation of the vehicular power conversion device 3 configured as described above will be described.
It should be noted that at a normal stage (when the railway vehicle 1 is in operation), the nut 41 presses the power conversion unit 20 against the heat dissipation unit 50 via the support rail 30 with the heat conductive sheet 45 interposed therebetween. Thereby, the power conversion unit 20 is stably installed inside the box 10 in a state where sliding movement is restricted.

  In particular, in this embodiment, since it is not a structure which fixes the power conversion unit 20 using general fastening means, such as a screw and a volt | bolt, a structure can be simplified and the space which installs a fastening means is also available. This space becomes unnecessary, and this space can be used effectively.

  When DC power is supplied to the vehicle power converter 3 from the overhead line 4 or a power supply source (not shown), this DC power is supplied to the semiconductor element 22 in the power conversion unit 20 in a state where an inrush current is prevented. The Then, the semiconductor element 22 performs switching by turn-on / turn-off from the gate amplifier, and performs power conversion from DC power to AC power. Thereby, the electric power required for operation of the railway vehicle 1 is ensured.

  The heat generated from the semiconductor element 22 during the power conversion is transmitted to the heat radiating unit 50 disposed outside the box 10 via the heat receiving plate 21 and the heat conductive sheet 45. The heat radiating unit 50 radiates the heat to the outside air. The power conversion unit 20 accommodated in the box 10 can be cooled by heat exchange by this heat radiation.

At this time, since the heat dissipating unit 50 includes the plurality of cooling fins 52, heat exchange with the outside air can be performed smoothly, and the power conversion unit 20 can be quickly cooled by improving heat dissipation. . Moreover, since the traveling wind accompanying the traveling of the railway vehicle 1 flows between the plurality of cooling fins 52, positive heat dissipation can be performed and stable cooling can be performed.
From these things, the stable and outstanding cooling performance can be obtained and the temperature rise inside the power conversion unit 20 and the box 10 can be suppressed effectively.

  In particular, since the heat conductive sheet 45 is provided between the power conversion unit 20 and the heat dissipation unit 50, the heat generated from the semiconductor element 22 can be transmitted to the heat dissipation unit 50 with less resistance. In addition, since the heat conductive sheet 45 is sandwiched between the heat receiving plate 21 and the heat radiating plate 51, the surface of the heat receiving plate 21 and the heat radiating plate 51 can have their own flexibility (elasticity). It can be absorbed and utilized, and is in close contact with the heat receiving plate 21 and the heat radiating plate 51 without any gap. Therefore, heat can be efficiently transferred from the power conversion unit 20 to the heat dissipation unit 50. Therefore, excellent cooling performance can be exhibited.

  Furthermore, in this embodiment, the heat receiving plate 21 is directly attached to the heat radiating plate 51 with the heat conductive sheet 45 interposed therebetween, and the heat conductive sheet 45 has a higher heat conductivity in the thickness direction than in the planar direction. have. From these things, the heat which generate | occur | produced in the power conversion unit 20 can be more efficiently transmitted to the thermal radiation unit 50, and high cooling performance can be anticipated.

Next, the attachment / detachment work of the power conversion unit 20 will be described.
In this case, the nut 41 in the accommodation chamber 34 opened in the left-car side L direction is accessed, and the nut 41 is rotated to move upward along the screw rod 40. The nuts 41 attached to the pair of support rails 30 are moved upward by the same amount.
By moving the nut 41 upward, the pressing of the power conversion unit 20 via the support rail 30 can be released, and the support rail 30 can be moved upward along the screw rod 40, so that the bottom wall portion 12 of the box body 10 can be moved. Can be separated from

  Specifically, as shown in FIG. 6, by moving the nut 41 upward, the pair of support rails 30 can be rotated around the hinge portion 36 and inclined with respect to the bottom wall portion 12. In this state, the pair of support rails 30 can be moved upward. At this time, the pair of support rails 30 are inclined so that the first end portion 30 </ b> A side positioned in the left vehicle side L direction is lifted greatly.

  Then, when the first end 30A of the support rail 30 reaches a desired height, the rotation operation of the nut 41 is finished. Thereby, a pair of support rail 30 can be fixed in the state inclined, for example by several degrees. Therefore, the power conversion unit 20 supported by the pair of support rails 30 can be maintained in a state where the power conversion unit 20 is lifted from the bottom wall portion 12 (floating in the air).

Next, the power conversion unit 20 floating in the air can be pulled out from the inside of the box 10 through the opening 15 to the outside by sliding the heat receiving plate 21 along the support rail 30 in the left vehicle side L direction. . Thereby, the removal operation | work of the power conversion unit 20 can be performed, and replacement | exchange operation | work of each component including the semiconductor element 22, a maintenance operation | work, etc. can be performed. Moreover, since the handle 26 attached to the heat receiving plate 21 can be used, it is possible to easily remove the power conversion unit 20.
Moreover, the installation work of the power conversion unit 20 can be performed by performing the reverse operation | work mentioned above.

  In particular, when the power conversion unit 20 is attached or detached, the power conversion unit 20 can be maintained in a state of being suspended in the air. For example, a series of continuous operations such as pulling out the power conversion unit 20 from the inside of the box 10 while lifting the power conversion unit 20 vertically. There is no need to perform routine work. Therefore, the attaching / detaching work of the power conversion unit 20 which is a heavy object can be easily performed as compared with the conventional one, and the attaching / detaching operability can be improved.

  Further, by simply rotating the nut 41, the power conversion unit 20 can be pressed against the heat conducting sheet 45 with an arbitrary pressure via the support rail 30, and the support rail 30 can be finely adjusted to an arbitrary height. Is possible. Moreover, when the support rail 30 is moved in the vertical direction L3, it is possible to prevent the support rail 30 from unexpectedly sliding down using the engagement of the nut 41 with the screw rod 40. Also in this respect, the detachability operability can be improved.

  Further, when the power conversion unit 20 is removed, the power conversion unit 20 is once lifted via the support rail 30, so that the power conversion unit 20 is not moved so as to be dragged on the heat conductive sheet 45. Therefore, wrinkles, rubbing, tearing, and the like can be suppressed from occurring in the heat conductive sheet 45, and the heat conductive sheet 45 can be continuously used for a long time in a good state.

Further, since the pair of support rails 30 supports the heat receiving plate 21 at both ends, the entire power conversion unit 20 can be stably supported with less shakiness and is excellent in stability.
Moreover, since the heat receiving plate 21 is supported at both ends, when the power conversion unit 20 is lifted, the heat receiving plate 21 is warped so that the central portion swells downward from both sides supported by the support rail 30 ( It tends to be a bent shape). Therefore, when the support rail 30 is moved downward and the lower surface of the heat receiving plate 21 is brought into contact with the heat conductive sheet 45, the central portion of the heat receiving plate 21 can be contacted first, and the remaining portions can be gradually contacted.
Therefore, it is difficult for a gap to be formed between the heat receiving plate 21 and the heat conductive sheet 45, and the entire lower surface of the heat receiving plate 21 can be brought into close contact with the heat conductive sheet 45. It is easy to ensure excellent thermal conductivity.

Furthermore, in this embodiment, since the power conversion unit 20 and the heat radiating unit 50 are disposed so as to face each other with the bottom wall portion 12 of the box 10 interposed therebetween, the inside of the box 10 is sealed with a packingless structure. Is possible. Therefore, it is easy to simplify the overall configuration by the packingless structure.
In addition, since the power conversion unit 20 and the heat dissipation unit 50 are separable, each can be designed individually, and the configuration of both the units 20 and 50 can be easily simplified and downsized.

  Furthermore, since the heat conductive sheet 45 includes the non-adhesive layer 45b, when removing the power conversion unit 20, the heat conductive sheet 45 and the heat receiving plate 21 can be easily separated. Also in this respect, it is easy to improve the detachability operability.

As described above, according to the present embodiment, the heat generated in the power conversion unit 20 can be efficiently transmitted to the heat dissipation unit 50, and the power conversion unit 20 and the box can be exhibited with a stable and excellent cooling performance. The temperature rise in the body 10 can be effectively prevented. In addition, the detachability operability of the power conversion unit 20 can be improved, maintenance and the like can be performed efficiently, and the heat conduction sheet 45 can be prevented from being broken, and the heat conduction sheet 45 can be kept in a good condition for a long time. Can continue to be used.
And since the vehicle power converter device 3 which has such an effect is comprised, it can be set as the rail vehicle 1 by which electric power supply was made stably and excellent in driving performance.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  For example, in the above-described embodiment, the configuration in which the power conversion unit 20 is placed on the heat dissipation unit 50 through the opening 16 formed in the bottom wall portion 12 with the heat conductive sheet 45 interposed therebetween is taken as an example. However, the present invention is not limited to this case.

For example, without forming the opening 16 in the bottom wall portion 12, the power conversion unit 20 is placed on the upper surface of the bottom wall portion 12 of the box body 10, and the heat dissipation unit 50 is mounted on the bottom wall portion 12 of the box body 10. It may be configured to be fixed to the lower surface.
Even in this case, the detachability operability of the power conversion unit 20 can be improved as in the above embodiment. Moreover, since the heat generated in the power conversion unit 20 can be transmitted to the heat radiating unit 50 disposed outside the box 10 through the bottom wall portion 12, the power conversion unit 20 can be exchanged by smooth heat exchange with the outside air. It can be cooled efficiently.

  However, from the viewpoint of cooling efficiency, it is preferable that the heat receiving plate 21 of the power conversion unit 20 and the heat radiating plate 51 of the heat radiating unit 50 are brought into contact with each other through the opening 16 formed in the bottom wall portion 12. It is more preferable that the heat receiving plate 21 and the heat radiating plate 51 are brought into contact with each other while being sandwiched therebetween.

Moreover, in the said embodiment, although it was set as the structure which rotates a pair of support rail 30 centering on the hinge part 36, it is not limited to this case. For example, you may comprise so that the whole support rail 30 may be translated in the up-down direction L3 along the screw rod 40. FIG. Even in this case, the same effect can be achieved.
However, since the number of nuts 41 to be rotated is smaller in the case of rotating around the hinge portion 36 than in the case of moving the entire support rail 30 in parallel, it is easier to improve the detachability operability. In addition, since the support rail 30 can be inclined, the power conversion unit 20 can be easily attached and detached.

L ... Left car side,
R ... Right car side,
M: Rotation axis L1 of the hinge part: the front-rear direction,
L2 ... left-right direction,
L3: Up and down direction,
1 ... Railcar,
2 ... the car body,
3 ... Vehicle power conversion device,
4 ... overhead lines,
5 ... Pantograph,
6 ... wheels,
7 ... cart,
8 ... Vehicle main motor,
10 ... box (control box),
11 ... the top wall,
12 ... bottom wall,
13 ... side wall,
14: Mounting piece (hanging ear),
15 ... opening of side wall,
16 ... the opening of the bottom wall,
17 ... Sealing material,
20 ... Power conversion unit,
21 ... heat receiving plate,
21A, 21B ... side edges,
21a ... upper flange,
21b ... lower flange,
22 ... Semiconductor element,
23: Smoothing capacitor,
24. Gate substrate,
25 ... Guide groove,
26 ... Toride,
27 ... Frame frame,
30 ... support rail,
30A ... first end,
30B ... second end,
31 ... Rail part,
32 ... stopper wall,
33 ... guide hole,
34 ... Containment room,
35 ... connecting bar (connecting member),
36 ... Hinge part,
40: Screw rod (guide member),
41 ... nut (fixing member),
45 ... heat conduction sheet,
45a ... seat body,
45b ... non-adhesive layer,
50 ... Heat dissipation unit,
51 ... heat sink,
52 ... cooling fins,

Claims (7)

A box having a bottom wall,
A power conversion unit housed inside the box;
A heat dissipating unit that is fixed to the lower surface of the bottom wall portion and dissipates heat generated by the power conversion unit outside the box;
A support rail mounted on the upper surface of the bottom wall and supporting the power conversion unit so as to be slidable;
A guide member that is erected on the upper surface of the bottom wall portion and guides the support rail so as to be movable in the vertical direction;
The power conversion unit can be fixed in a state of being pressed against the upper surface of the bottom wall portion via the support rail, and the support rail separated from the bottom wall portion along the guide member can be fixed at an arbitrary height. A vehicle power conversion device comprising: a fixing member that can be fixed. The vehicle power converter according to claim 1,
The bottom wall is formed with an opening,
The power conversion unit is placed with respect to the heat radiating unit through the opening while sandwiching a heat conductive sheet therebetween,
The fixed member is a vehicle power conversion device that presses the power conversion unit against the heat dissipation unit via the support rail. In the vehicle power converter according to claim 1 or 2,
A connecting member that is fixed to the upper surface of the bottom wall portion and that connects one end portion of the support rail along the sliding direction via a hinge portion;
The support rail is a vehicle power conversion device that rotates around the hinge portion along the guide member. In the vehicle power converter device according to any one of claims 1 to 3,
The guide member is a threaded rod formed with a threaded portion,
The power conversion device for a vehicle, wherein the fixing member is a nut provided on the support rail and screwed to the screw rod. In the vehicle power converter device according to any one of claims 1 to 4,
The power conversion unit includes a heat receiving plate, and a semiconductor element fixed on the heat receiving plate and performing power conversion,
The said support rail is a vehicle power converter device which supports the said heat receiving plate so that sliding movement is possible. In the vehicle power converter according to claim 5,
The heat receiving plate is formed in a rectangular shape in plan view having a pair of side edges extending along the sliding direction,
The said support rail is a vehicle power converter device which supports the said heat receiving plate both-ends via said pair of side edge part.   A rail vehicle provided with the vehicle body in which the vehicle power converter device of any one of Claim 1 to 6 was attached under the floor.

Images