JP6892003B2 - Power converter for railroad vehicles - Google Patents

Description

The present invention relates to a power converter for railway vehicles.

Conventionally, a power conversion device for a railway vehicle including a fan as a heat radiating unit is known (see, for example, Patent Document 1).

The above-mentioned Patent Document 1 discloses a power conversion device for a railroad vehicle including a plurality of electric products including a power conversion unit, a control unit, and the like, a ventilation path, and a cooling fan. In this power conversion device for railway vehicles, a plurality of electric appliances, ventilation passages, and cooling fans are all arranged in the same room in the housing. Further, the ventilation passage of the power conversion device for a railway vehicle is formed so as to extend along the wall surface of the housing. As a result, in the power conversion device for railroad vehicles, the air flowing through the ventilation passage is cooled by heat exchange with the wall surface of the housing, and the cooled air is configured to cool a plurality of electric parts. There is.

Here, among the electrical components included in the power conversion device, the power conversion unit has a large amount of heat generated by applying a high voltage, while the control unit has a power conversion unit by not applying a very large voltage. The calorific value is small compared to. An electric product having a large calorific value generally has a high permissible temperature (upper limit of the temperature recognized as not hindering operation), and an electric product having a small calorific value generally has a low permissible temperature.

Japanese Unexamined Patent Publication No. 2013-166501

However, in the power conversion device for a railroad vehicle described in Patent Document 1, since an electric product having a large heat generation amount and an electric product having a small heat generation amount are arranged in the same room in the housing, the inside of the housing is contained. It is considered that the temperature of air is easily affected by the heat from electrical products that generate a large amount of heat, and the temperature of air inside the housing tends to be high. Therefore, there is a problem that the temperature of an electric product (control unit (control unit)) having a low permissible temperature may become higher than the permissible temperature due to the high temperature of the air in the housing. it is conceivable that. In particular, in a miniaturized electric power conversion device for a railway vehicle, since a plurality of electric products are densely arranged, the temperature of the electric products having a low permissible temperature tends to be higher than the permissible temperature.

The present invention has been made to solve the above problems, and one object of the present invention is that the temperature of an electric device (electric device including a control unit) having a low permissible temperature exceeds the permissible temperature. It is to provide the electric power conversion apparatus for railroad vehicles which can suppress the increase.

In order to achieve the above object, in the electric power conversion device for a railroad vehicle according to one aspect of the present invention, the electric power is converted by arranging the first chamber, the housing including the second chamber, and the first chamber. It is arranged in the second chamber and the first electric device including the main circuit section, which has a smaller calorific value than the first electric device, has a lower allowable temperature than the first electric device, and controls the main circuit section. A second electrical device including a control unit, a partition wall for thermally separating the first room and the second room, and heat dissipation provided in the second room to release the heat of the air in the second room. A unit and a fan for the first room which is arranged in the first room and circulates the air in the first room are provided, and wiring for connecting the first electric device and the second electric device is provided on the partition wall. A wiring hole through which the wiring hole passes is formed, and the wiring hole is arranged at a position where the air circulated in the first chamber by the fan for the first chamber flows in a direction away from the second chamber.

In the electric power conversion device for railway vehicles according to one aspect of the present invention, as described above, the first room in which the first electric device including the main circuit portion in which the electric power is converted is arranged and the first electric device are more than the first electric device. The amount of heat generated is small, the permissible temperature is lower than that of the first electric device, and the second chamber including the control unit that controls the main circuit unit is arranged to be thermally separated from the second room. Provide a partition wall. As a result, it is possible to suppress the temperature of the air in the second room from rising due to the heat of the air in the first room warmed by the first electric device, so that the permissible temperature arranged in the second room is low. It is possible to prevent the temperature of the second electric device (control unit) from rising. Further, a heat radiating portion for releasing the heat of the air in the second room is provided in the second room. As a result, the heat radiating unit can release the heat generated in the second electric device from the second electric device. As a result, it is possible to prevent the temperature of the second electric device (control unit) having a low permissible temperature from becoming higher than the permissible temperature. As a result, the electric devices can be arranged densely, so that the power conversion device for railway vehicles can be easily miniaturized. Further, even if a partition wall for thermally separating the first room and the second room is provided, the first electric device and the second electric device can be easily connected by passing the wiring through the wiring hole. Can be done.

In the electric power conversion device for railway vehicles according to the above one aspect, the heat radiating unit is preferably arranged in the second chamber and includes a fan for the second chamber that circulates the air in the second chamber. With this configuration, the air is circulated in the second chamber by the fan for the second chamber, so that the heat generated in the second electrical equipment can be effectively dissipated from the second electrical equipment, which is permissible. It is possible to reliably prevent the temperature of the second electric device having a low temperature from becoming higher than the allowable temperature.

In this case, preferably, the heat dissipation unit further includes a heat dissipation promotion unit that promotes the heat of the air circulated in the second chamber by the fan for the second chamber to be released to the outside of the housing. With this configuration, the heat dissipation promotion unit can easily release the heat of the air circulated in the second chamber to the outside of the housing. Therefore, the air circulating in the second chamber can be used to release the heat of the air circulated in the second chamber to the outside of the housing. Can be effectively cooled.

In the configuration in which the heat radiating portion further includes the heat radiating promoting portion, the heat radiating promoting portion is preferably arranged in the air circulation path by the fan for the second chamber so as to project from the inner surface of the housing toward the second chamber. It has a plurality of ribs provided. With this configuration, the heat of the air in the second chamber can be efficiently absorbed by the plurality of ribs arranged in the air circulation path, and the air in the second chamber can be cooled. Then, the cooled air is circulated in the second chamber, so that the second electric device can be cooled more effectively.

In the configuration in which the heat dissipation promoting portion has a plurality of ribs, the plurality of ribs are preferably integrally provided on the inner surface of the housing. With this configuration, the heat absorbed by the plurality of ribs can be easily transferred to the housing, so that the heat of the air in the second chamber can be absorbed more efficiently and the air in the second chamber can be absorbed. Can be cooled. Then, the cooled air is circulated in the second chamber, so that the second electric device can be cooled more effectively.

In the configuration in which the heat radiating unit includes the fan for the second chamber, preferably, the control unit is composed of a plurality of control plates extending in the vertical direction, and the fan for the second chamber is downward between the control plates. It is arranged below the control unit so that air flows upward from the control unit. With this configuration, the second chamber fan can more effectively cool the control unit composed of the plurality of control plates. Further, the fan for the second chamber is arranged below the control unit so that air flows from the lower side to the upper side. As a result, the air that has passed between the control plates of the control unit and has been warmed is cooled by circulating in the second chamber, and the air is sucked into the fan for the second chamber. The temperature of the air sucked into the fan can be lowered. As a result, it is possible to prevent the service life of the second chamber fan from being shortened due to the high temperature air.

In the electric power conversion device for railroad vehicles according to the above one aspect, preferably, the partition wall is first by blocking the air circulating in the first chamber from flowing into the second chamber by the fan for the first chamber. The room and the second room are thermally separated. With this configuration, the partition wall blocks the air circulating in the first chamber from flowing into the second chamber by the fan for the first chamber, so that the first chamber and the second chamber can be easily separated from each other. Can be thermally separated. Further, since the air in the first chamber is circulated by the fan for the first chamber, it is possible to prevent the air in the first chamber from becoming excessively high temperature. As a result, even a first electric device having a high permissible temperature can be prevented from causing a problem due to being exposed to an excessively high temperature environment.

According to the present invention, as described above, it is possible to prevent the temperature of the second electric device (electric device including the control unit) having a low permissible temperature from becoming higher than the permissible temperature.

It is a schematic side view which showed the high-speed rail car of the knitting state by one Embodiment of this invention. It is a perspective view which looked at the high-speed railway vehicle by one Embodiment of this invention from the bottom. It is a perspective view which looked at the power conversion apparatus by one Embodiment of this invention from the bottom. It is an exploded perspective view excluding the top plate of the power conversion apparatus according to one Embodiment of this invention. It is a top view which showed the state which the top plate of the power conversion apparatus by one Embodiment of this invention was removed. It is sectional drawing along the line 300-300 of FIG. It is a side view which showed the state which the side plate on the control room side of the power conversion apparatus by one Embodiment of this invention was removed. It is a side view of the power conversion apparatus by the modification of one Embodiment of this invention.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

[Structure of high-speed railway vehicles]
With reference to FIGS. 1 to 3, a configuration of a high-speed railway vehicle 10 in which a power conversion device 100 for a railway vehicle (hereinafter referred to as a power conversion device 100) according to an embodiment of the present invention is installed will be described.

The high-speed railway vehicle 10 is a high-speed railway vehicle that travels at, for example, 180 km / h or more in a state where a plurality of vehicles are organized. As shown in FIG. 1, the high-speed railway vehicle 10 is configured to travel by electric power supplied from the overhead wire 1 as an AC power source. In this embodiment, a case where the high-speed railway vehicle 10 travels from the X1 direction side to the X2 direction side in the traveling direction (X direction) will be described. Further, the high-speed railway vehicle 10 is an example of a "railroad vehicle" within the scope of claims.

As shown in FIGS. 1 and 2, the high-speed rail vehicle 10 includes a vehicle body 11, a pantograph 12, a power conversion device 100, and an electric device 13 such as an induction motor and an air conditioner.

As shown in FIG. 3, the bottom portion 11a of the vehicle body 11 is provided with a pair of rails 11b for attaching the power conversion device 100 in a suspended state. As a result, the power conversion device 100 is attached below the bottom portion 11a (Z2 direction) of the vehicle body 11 of the high-speed railway vehicle 10.

As shown in FIG. 1, the pantograph 12 has a role of receiving electric power from the overhead wire 1. The power conversion device 100 has a role of converting an AC voltage from a pantograph 12 transformed by a transformer (not shown) into a desired three-phase AC voltage and frequency and outputting the AC voltage to an electric device 13 or the like.

[Power converter configuration]
Next, with reference to FIGS. 3 to 7, a detailed configuration of the power conversion device 100 according to the embodiment of the present invention will be described.

As shown in FIG. 3, the power conversion device 100 includes a metal housing 20, a power conversion device main body 30 (see FIG. 4) arranged inside the housing 20, and a rail of the vehicle body 11 with the housing 20. It includes a plurality of mounting portions 40 for mounting on 11b.

As shown in FIGS. 4 to 6, the housing 20 is divided into three rooms (main circuit room 20a, control room 20b, and auxiliary equipment room 20c). The main circuit room 20a is located in the center of the housing 20 in the sleeper direction (Y direction), the control room 20b is located on one side (Y1 direction side) of the housing 20 in the sleeper direction, and the auxiliary equipment room 20c is located. , Is located on the other side (Y2 direction side) of the housing 20 in the sleeper direction. The main circuit room 20a is an example of the "first room" in the claims, and the control room 20b is an example of the "second room" in the claims.

The housing 20 includes a top plate 21 and side plates 22, 23, 24, and 25. As shown in FIG. 6, the top plate 21 is arranged on the upper side (Z1 direction side) and constitutes the upper surface portion of the housing 20. As shown in FIGS. 4 and 5, the side plates 22 and 23 form a side surface portion of the housing 20 on one side (X1 direction side) and the other side (X2 direction side) in the traveling direction (X direction), respectively. doing. The side plates 24 and 25 form the side surface portions of the housing 20 on the Y1 direction side and the Y2 direction side in the sleeper direction (Y direction), respectively.

Further, when the high-speed railway vehicle 10 travels, as shown in FIG. 3, traveling wind flows on the outside of the side plates 24 and 25 and the outside of the lower surface portion of the housing 20.

As shown in FIGS. 4 and 5, the power conversion device main body 30 includes a main circuit unit 31, a control unit 32, a first auxiliary electric device 33, and a second auxiliary electric device 34. The main circuit unit 31 is an example of the "first electric device" in the claims, and the control unit 32 is an example of the "control unit" and the "second electric device" in the claims.

The main circuit unit 31 includes an inverter and a converter, and has a function of converting an AC voltage from the pantograph 12 (see FIG. 1) into a desired three-phase AC voltage and frequency. Further, the main circuit unit 31 cools the transistor unit 31a in which a plurality of filter transistors (not shown) are arranged, the plurality of semiconductor element units 31b in which semiconductor elements such as switching elements are arranged, and the semiconductor element unit 31b. The cooling unit 31c is included. The cooling unit 31c is provided with a plurality of cooling fins 31d that are formed so as to be exposed to the outside from the lower part of the housing 20 and that release the heat of the main circuit unit 31 to the outside.

The control unit 32 has a function of controlling the entire power conversion device 100 such as switching of a gate (not shown) of the main circuit unit 31. Further, the control unit 32 is formed by arranging a plurality of plate-shaped control plates 32a extending in the vertical direction (Z direction) side by side in the traveling direction (X direction). As a result, the control unit 32 is configured so that air can flow in the vertical direction between the control plates 32a.

The first auxiliary electric device 33 includes a gate power source that supplies power to the gate, and a plurality of electric devices such as a grounding detection circuit (GCT) that detects grounding (ground fault). The second auxiliary electric device 34 includes a plurality of electric devices such as an overvoltage protection circuit (OVT) and a charging circuit for suppressing an overvoltage from being applied to the main circuit unit 31.

Further, the main circuit unit 31 is arranged in substantially the entire area in the main circuit room 20a of the housing 20 in a plan view. The control unit 32 is arranged in the control chamber 20b of the housing 20 at substantially the center of the traveling direction (X direction) and on the Y2 direction side in a plan view. The first auxiliary electric device 33 is arranged on the X1 direction side and the X2 direction side of the control unit 32 in the control chamber 20b of the housing 20 in a plan view, respectively. The second auxiliary electric device 34 is arranged in the auxiliary device room 20c of the housing 20.

Further, the main circuit unit 31 is a so-called high-voltage device, and a large amount of heat is generated by applying a high voltage during driving. Further, the main circuit unit 31 and the second auxiliary electric device 34 have high permissible temperatures. On the other hand, the control unit 32 is a so-called low-voltage device, and the amount of heat generated is small when a low voltage is applied. Further, the control unit 32 has a low allowable temperature.

Here, in the present embodiment, as shown in FIGS. 4 and 5, a plurality of inner surfaces 22a of the side plate 22 on the X1 direction side of the housing 20 project from the inner surface 22a toward the X2 direction side (inside the control chamber 20b). Ribs 22b are provided. The plurality of ribs 22b are formed in a portion 22c of the side plate 22 that constitutes a side surface portion of the control chamber 20b among the side plates 22. Similarly, the inner surface 23a of the side plate 23 on the X2 direction side of the housing 20 is provided with a plurality of ribs 23b protruding from the inner surface 23a toward the X1 direction side (inside the control chamber 20b). The plurality of ribs 23b are formed in a portion 23c of the side plate 23 that constitutes a side surface portion of the control chamber 20b among the side plates 23. Further, the plurality of ribs 22b and 23b are both formed side by side in the sleeper direction (Y direction), and are formed in a plate shape extending in the vertical direction (Z direction) along the inner surfaces 22a and 23a, respectively. There is. The ribs 22b and 23b are examples of the "heat dissipation promoting portion" and the "heat dissipation portion" in the claims, and the inner surfaces 22a and 23a are examples of the "inner side surface" in the claims.

Further, a plurality of ribs 24b protruding from the inner surface 24a to the Y2 direction side (inside the control chamber 20b) are provided on the inner surface 24a of the side plate 24 on the Y1 direction side of the housing 20. Further, the plurality of ribs 24b are formed side by side in the traveling direction (X direction), and are formed in a plate shape extending in the vertical direction along the inner surface 24a. The rib 24b is an example of the "heat dissipation promoting portion" and the "radiating portion" in the claims, and the inner surface 24a is an example of the "inner side surface" in the claims.

Further, the plurality of ribs 22b, 23b and 24b are all made of metal and are made of a member that easily absorbs heat. Further, the plurality of ribs 22b, 23b and 24b are integrally provided on the inner surface 22a of the side plate 22, the inner surface 23a of the side plate 23 and the inner surface 24a of the side plate 24, respectively. As a result, the heat absorbed by the plurality of ribs 22b, 23b and 24b is efficiently transferred to the side plates 22, 23 and 24, respectively, and discharged from the side plates 22, 23 and 24 to the outside of the power conversion device 100. To.

Further, as shown in FIG. 4, the housing 20 includes plate members 26 and 27 bent in an L shape. The plate member 26 is Y1 from the lower end of the wall portion 26a so as to form a wall portion 26a extending in the vertical direction (Z direction) so as to partition the main circuit chamber 20a and the control chamber 20b and a bottom portion of the control chamber 20b. It has a bottom plate portion 26b extending in the direction side. The plate member 27 extends in the Y2 direction from the lower end of the wall portion 27a so as to form a wall portion 27a extending in the vertical direction so as to partition the main circuit chamber 20a and the control chamber 20c and a bottom portion of the control chamber 20c. It has a bottom plate portion 27b. The wall portion 26a is an example of a “partition wall” within the scope of the claims.

The wall portion 26a of the plate member 26 is provided with a wiring hole 26c for passing the wiring 50. The wiring hole 26c is formed on the X1 direction side and the Z1 direction side of the wall portion 26a so as to penetrate the wall portion 26a in the sleeper direction (Y direction). The wiring hole 26c is an example of a “hole” within the scope of the claims.

The wiring 50 connects the main circuit unit 31 in the main circuit room 20a and the control unit 32 in the control room 20b. Although the wiring 50 is shown in FIG. 4, the wiring 50 is actually routed along the inner surface of the top plate 21 of the housing 20 in the main circuit room 20a.

The board member 26 (wall portion 26a) is not provided with a fan arranged so as to penetrate the board member 26 in the direction of the sleepers.

As shown in FIGS. 4 and 5, the plate member 27 is provided with two fans 51a and 51b. The fans 51a and 51b are attached to the plate member 27 so as to penetrate the wall portion 27a of the plate member 27 in the sleeper direction (Y direction). The fan 51a is arranged on the X2 direction side and the Z1 direction side of the wall portion 27a, and is configured to circulate air in the Y1 direction from the auxiliary equipment room 20c toward the main circuit room 20a. The fan 51b is arranged on the X1 direction side and the Z1 direction side of the wall portion 27a, and is configured to circulate air in the Y2 direction from the main circuit room 20a toward the auxiliary equipment room 20c. Further, a fan 51c that circulates air in the X2 direction is arranged at substantially the center of the auxiliary equipment room 20c in the traveling direction (X direction) and on the Z1 direction side. The fans 51a to 51c are examples of "fans for the first room" in the claims.

As a result, the three fans 51a to 51c are configured to circulate air between the main circuit chamber 20a and the auxiliary equipment chamber 20c. That is, on the X1 direction side of the housing 20, air flows from the Y1 direction side toward the Y2 direction side, and on the X2 direction side of the housing 20, air flows from the Y2 direction side toward the Y1 direction side. Further, on the Y1 direction side of the housing 20 (main circuit room 20a), air flows from the X2 direction side toward the X1 direction side, and on the Y2 direction side of the housing 20 (auxiliary equipment room 20c), the air flows. It flows from the X1 direction side toward the X2 direction side. Since the fans 51a and 51b are both arranged on the Z1 direction side, the air flowing through the main circuit chamber 20a is configured to circulate above the main circuit chamber 20a.

Further, the air circulating between the main circuit chamber 20a and the auxiliary equipment chamber 20c is cooled by exchanging heat with the housing 20. In the side plate 25, heat exchange between the side plate 25 and the outside air is likely to be performed more efficiently due to the traveling wind of the high-speed railway vehicle 10. As a result, the air circulating between the main circuit chamber 20a and the auxiliary equipment chamber 20c is mainly cooled in the auxiliary equipment chamber 20c.

Here, in the present embodiment, as shown in FIGS. 4 and 5, the wall portion 26a of the plate member 26 has a function of blocking the air circulating in the main circuit chamber 20a from flowing into the control chamber 20b. ing. As a result, the main circuit chamber 20a and the control chamber 20b are thermally separated by the wall portion 26a of the plate member 26. Further, since the wiring hole 26c is provided on the X1 direction side and the Z1 direction side of the wall portion 26a, the air in the main circuit chamber 20a is controlled from the main circuit chamber 20a through the wiring hole 26c. The inflow into the chamber 20b is suppressed. That is, in the main circuit chamber 20a, the direction of air flow on the X1 direction side is the direction from the Y1 direction side to the Y2 direction side (the direction away from the wiring hole 26c), so that the wall portion 26a is provided on the X1 direction side. The inflow of air from the main circuit chamber 20a into the wiring hole 26c is suppressed. As a result, even when the wiring hole 26c is provided in the plate member 26 (wall portion 26a), the state in which the main circuit chamber 20a and the control chamber 20b are thermally separated by the wall portion 26a is maintained. There is.

Further, as shown in FIG. 7, the control chamber 20b of the housing 20 is provided with a holding portion 60 and two fans 61 and 62. The fans 61 and 62 are arranged side by side in the traveling direction (X direction). Further, the fans 61 and 62 have a function of circulating the air in the control chamber 20b. The fans 61 and 62 are examples of the "fan for the second chamber" and the "heat dissipation unit" in the claims.

The holding portion 60 has a support portion 63 that supports the control unit 32 from below (Z2 direction), and side plate portions 64 and 65 arranged on both sides of the control unit 32 in the traveling direction, respectively. The support portion 63 is formed in a frame shape, and an opening 63a is formed substantially in the center in a plan view. Two fans 61 and 62 that blow air from below to above are attached to the lower surface of the support portion 63 through the opening 63a. That is, the fans 61 and 62 are arranged below the control unit 32 so that air flows between the control plates 32a of the control unit 32 from the bottom to the top. Further, as shown in FIG. 5, the fans 61 and 62 are arranged below the control unit 32 so as to overlap the control unit 32 as a whole when viewed in a plane.

As shown in FIG. 7, the side plate portions 64 and 65 are formed so as to extend in the vertical direction (Z direction) from the support portion 63 to the top plate 21. Further, as shown in FIG. 4, the side plate portions 64 and 65 are composed of plate-shaped members extending in the sleeper direction (Y direction). Further, the side plate portions 64 and 65 are formed so as to cover the entire control unit 32 when viewed from the side in the traveling direction.

Holes 64a and 65a are formed in the upper portion of the side plate portion 64 and the upper portion of the side plate portion 65, respectively. The holes 64a and 65a are formed in a circular shape when viewed from the side in the traveling direction. Further, at least a part of the holes 64a and 65a is formed so as to be exposed above the upper surface 32b of the control unit 32. It is preferable that at least the upper half of the holes 64a and 65a is exposed above the upper surface 32b of the control unit 32.

Next, the air circulation path (flow) in the control chamber 20b will be described.

The air flowing upward from the two fans 61 and 62 passes between the plurality of control plates 32a of the control unit 32 arranged above the fans 61 and 62. As a result, the air absorbs the heat of the control plate 32a and is warmed, and the control unit 32 is cooled. Then, the warmed air is discharged to the outside of the control unit 32 from the upper surface 32b of the control unit 32.

After that, a part of the air warmed by the control unit 32 passes through the hole portion 64a of the side plate portion 64 from the central space in the traveling direction of the control chamber 20b where the control unit 32 is located in the X1 direction of the side plate portion 64. It flows into the space on the side. Then, the air flowing into the space on the X1 direction side of the side plate portion 64 flows from the upper side to the lower side along the side plate 22 while cooling the first auxiliary electric device 33. At that time, the air is cooled by absorbing heat from the warmed air by the plurality of ribs 22b integrally formed on the side plate 22. The heat absorbed by the plurality of ribs 22b is released to the outside of the power conversion device 100 via the side plate 22. After reaching the lower part of the side plate 22, the cooled air flows toward the Y1 direction side. After that, the air flows along the side plate 24 toward the X2 direction side (control unit 32 side).

Further, a part of the air warmed by the control unit 32 passes through the hole portion 65a of the side plate portion 65 from the central space in the traveling direction of the control chamber 20b where the control unit 32 is located in the X2 direction of the side plate portion 65. It flows into the space on the side. Then, the air flowing into the space on the X2 direction side of the side plate portion 65 flows from the upper side to the lower side along the side plate 23 while cooling the first auxiliary electric device 33. At that time, the air is cooled by absorbing heat from the warmed air by the plurality of ribs 23b integrally formed on the side plate 23. The heat absorbed by the plurality of ribs 23b is released to the outside of the power conversion device 100 via the side plate 23. After reaching the lower part of the side plate 23, the cooled air flows toward the Y1 direction side. After that, the air flows along the side plate 24 toward the X1 direction side (control unit 32 side).

Further, a part of the air warmed by the control unit 32 flows in the Y1 direction along the side plate portions 64 and 65, reaches the side plate 24, and flows from the upper side to the lower side along the side plate 24. At that time, the air is cooled by absorbing heat from the warmed air by the plurality of ribs 24b integrally formed on the side plate 24. The heat absorbed by the plurality of ribs 24b is released to the outside of the power conversion device 100 via the side plate 24. At this time, due to the running wind of the high-speed railway vehicle 10 flowing outside the side plate 24, the endothermic efficiency of the side plate 24 (rib 24b) is higher than that of the side plate 22 (rib 22b) and the side plate 23 (rib 23b). growing. After that, the cooled air reaches the lower part of the side plate 24 and then flows along the side plate 24 toward the control unit 32 side.

Then, the air cooled by the side plates 22 to 24 flows from the lower portion on the Y1 direction side toward the two fans 61 and 62, and again upward so as to cool the control unit 32 by the fans 61 and 62. It is blown.

As a result, air is circulated by the fans 61 and 62 in the control chamber 20b. At that time, the air warmed by absorbing the heat of the control unit 32 and the first auxiliary electric device 33 is cooled by the plurality of ribs 22b, the plurality of ribs 23b, and the plurality of ribs 24b located in the air circulation path. ..

[Effect of this embodiment]
In this embodiment, the following effects can be obtained.

In the present embodiment, as described above, the amount of heat generated in the main circuit section 20a in which the main circuit section 31 in which the power is converted is arranged is smaller than that in the main circuit section 31, and is smaller than that in the main circuit section 31. A wall portion 26a is provided to thermally separate the inside of the control chamber 20b in which the control unit 32 that controls the main circuit portion 31 is arranged while the allowable temperature is low. As a result, it is possible to suppress the temperature of the air in the control chamber 20b from rising due to the heat of the air in the main circuit chamber 20a warmed by the main circuit unit 31, so that the air is arranged in the control chamber 20b. It is possible to suppress an increase in the temperature of the control unit 32 having a low allowable temperature. Further, ribs 22b, 23b, 24b, fans 61 and 62 for releasing the heat of the air in the control chamber 20b are provided in the control chamber 20b. Thereby, the heat generated in the control unit 32 can be released from the control unit 32 by the ribs 22b, 23b, 24b, the fans 61 and 62. As a result, it is possible to prevent the temperature of the control unit 32, which has a low permissible temperature, from becoming higher than the permissible temperature. As a result, the main circuit unit 31, the control unit 32, the first auxiliary electric device 33, and the second auxiliary electric device 34 can be arranged densely, so that the power conversion device 100 can be easily miniaturized. ..

Further, in the present embodiment, as described above, the inside of the main circuit chamber 20a and the inside of the control chamber 20b are thermally separated, so that the fan is sufficiently cooled to the allowable temperature or less. There is no need to increase the size, and there is no need to install many fans. As a result, the power conversion device 100 can be easily miniaturized while suppressing an increase in the number of parts.

Further, in the present embodiment, as described above, the fans 61 and 62 for circulating the air in the control chamber 20b are provided in the control chamber 20b. As a result, the air is circulated in the control chamber 20b by the fans 61 and 62, so that the heat generated in the control unit 32 can be effectively dissipated from the control unit 32, so that the control unit 32 having a low allowable temperature can be effectively released. It is possible to surely prevent the temperature of the above from exceeding the permissible temperature.

Further, in the present embodiment, as described above, the ribs 22b, 23b, and 24b that promote the heat of the air circulated in the control chamber 20b by the fans 61 and 62 to be released to the outside of the housing 20 are provided. Provide. As a result, the ribs 22b, 23b, and 24b can easily release the heat of the air circulated in the control chamber 20b to the outside of the housing 20, so that the air circulating in the control chamber 20b controls the heat. The unit 32 can be effectively cooled.

Further, in the present embodiment, as described above, the plurality of ribs 22b, the plurality of ribs 23b, and the plurality of ribs 24b are arranged in the air circulation path by the fans 61 and 62, and the inner surface 22a of the housing 20 is arranged. , 23a and 24a so as to project into the control chamber 20b, respectively. As a result, the heat of the air in the control chamber 20b is efficiently absorbed by the plurality of ribs 22b, the plurality of ribs 23b, and the plurality of ribs 24b arranged in the air circulation path, and the heat in the control chamber 20b is efficiently absorbed. The air can be cooled. Then, the cooled air is circulated in the control chamber 20b, so that the control unit 32 can be cooled more effectively.

Further, in the present embodiment, as described above, the plurality of ribs 22b, the plurality of ribs 23b, and the plurality of ribs 24b are formed on the inner surface 22a of the side plate 22, the inner surface 23a of the side plate 23, and the inner surface 24a of the side plate 24, respectively. Provided integrally. As a result, the heat absorbed by the plurality of ribs 22b, the plurality of ribs 23b, and the plurality of ribs 24b integrally provided in the housing 20 can be easily transferred to the housing 20, so that the control chamber can be used. The heat of the air in the control chamber 20b can be absorbed more efficiently to cool the air in the control chamber 20b. Then, the cooled air is circulated in the control chamber 20b, so that the control unit 32 can be cooled more effectively.

Further, in the present embodiment, as described above, the control unit 32 is composed of a plurality of control plates 32a extending in the vertical direction (Z direction), and the fans 61 and 62 are moved downward between the control plates 32a. It is arranged below the control unit 32 so that air flows upward from the control unit 32. Thereby, the fans 61 and 62 can more effectively cool the control unit 32 composed of the plurality of control plates 32a. Further, the fans 61 and 62 are arranged below the control unit 32 so that air flows from the lower side to the upper side. As a result, the air that has passed between the control plates 32a of the control unit 32 and is warmed by circulating in the control chamber 20b is cooled by circulating in the control chamber 20b, and the air is sucked into the fans 61 and 62. The temperature of the air sucked into 61 and 62 can be lowered. As a result, it is possible to suppress the shortening of the useful life of the fans 61 and 62 due to the high temperature air.

Further, in the present embodiment, as described above, the wall portion 26a blocks the air circulating in the main circuit chamber 20a by the fans 51a to 51c from flowing into the control chamber 20b, thereby blocking the main circuit chamber 20a. The power conversion device 100 is configured so as to thermally separate the inside and the inside of the control chamber 20b. As a result, the wall portion 26a blocks the air circulating in the main circuit chamber 20a from flowing into the control chamber 20b by the fans 51a to 51c, so that the inside of the main circuit chamber 20a and the inside of the control chamber 20b can be easily facilitated. Can be thermally separated. Further, since the air in the main circuit chamber 20a is circulated by the fans 51a to 51c, it is possible to prevent the air in the main circuit chamber 20a from becoming excessively high in temperature. As a result, even the main circuit unit 31 having a high permissible temperature can be prevented from causing a problem due to being exposed to an excessively high temperature environment.

Further, in the present embodiment, as described above, the wall portion 26a is provided with a wiring hole 26c through which the wiring 50 for connecting the main circuit portion 31 and the control unit 32 passes. As a result, even if the wall portion 26a that thermally separates the inside of the main circuit chamber 20a and the inside of the control chamber 20b is provided, the main circuit portion 31 and the control unit 32 can be separated by passing the wiring 50 through the wiring hole 26c. Can be easily connected.

(Modification example)
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is shown by the scope of claims rather than the description of the above-described embodiment, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment, as an example of the "heat dissipation promoting portion of the heat radiating portion" in the claims, a plurality of ribs 22b, a plurality of ribs 23b, and a plurality of ribs 24b protruding toward the inside of the control chamber 20b are provided. As shown, the present invention is not limited to this. In the present invention, for example, a rib as an example of the "heat dissipation promotion part of the heat dissipation part" in the claims may be provided so as to project to the outside of the power conversion device for a railway vehicle. As a specific example, as in the railroad vehicle power conversion device 200 of the modified example of the embodiment of the present invention shown in FIG. 8, the bottom plate portion 126b of the plate member 126 is lowered toward the outside of the housing 120. A plurality of outer ribs 126d may be provided so as to project to the outer rib 126d. As a result, the heat transferred to the bottom plate portion 126b can be quickly released to the outside of the housing 120 via the plurality of outer ribs 126d. The outer rib 126d is an example of the "heat dissipation promoting portion" and the "heat dissipation portion" in the claims.

When the ribs are provided so as to project outward from the housing, they are preferably provided at the bottom or side surfaces of the housing through which the running wind flows in order to efficiently exchange heat. When the ribs are provided so as to project outward from the housing, the ribs are not provided so as to extend in the vertical direction but extend in the traveling direction and the sleeper direction in order to reduce the traveling resistance of the railway vehicle. It is preferable to provide it in.

Further, in the above embodiment, as an example of the "heat dissipation promoting portion of the heat radiating portion" in the claims, a plurality of ribs (s) are formed on the side plate 22 on the X1 direction side, the side plate 23 on the X2 direction side, and the side plate 24 on the Y1 direction side. An example in which a plurality of ribs 22b, a plurality of ribs 23b, and a plurality of ribs 24b) are provided is shown, but the present invention is not limited thereto. In the present invention, the ribs may be provided only on any one or two of the side plates. Further, the rib may be provided on the top plate of the housing. Further, instead of providing a plurality of ribs on the side plate, only one rib may be provided on the side plate (bottom plate or top plate).

Further, in the above embodiment, ribs 22b, 23b, 24b, fans 61 and 62 are shown as an example of the "radiating part" in the claims, but the present invention is not limited to this. In the present invention, a heat radiating portion other than the rib and the fan that radiates the air in the second chamber may be provided in the second chamber. For example, a heat exchanger that dissipates heat from the air in the second room may be provided in the second room as a heat radiating unit.

Further, in the above embodiment, ribs 22b, 23b, 24b, fans 61 and 62 are shown as an example of the "radiating part" in the claims, but the present invention is not limited to this. In the present invention, only the fan may be provided without providing the rib in the second chamber.

Further, in the above embodiment, an example in which two fans 61 and 62 are arranged in the control chamber 20b is shown, but the present invention is not limited to this. In the present invention, the number of fans may be one or three or more. It is preferable that the number of fans is two or more because the control unit can be continuously cooled by another fan even if one fan has a problem. That is, it is preferable that the number of fans is a plurality and a small number from the viewpoint of suppressing the number of parts and maintaining the cooling of the control unit.

Further, in the above embodiment, an example in which the two fans 61 and 62 are arranged below the control unit 32 (control unit) is shown, but the present invention is not limited to this. In the present invention, the fan may be arranged in the second chamber. For example, the fan may be placed above the control unit. In addition, in order to cool the control unit efficiently, it is preferable to arrange a fan in the vicinity of the control unit.

Further, in the above embodiment, the main circuit unit 31 is shown as an example of the "first electric device" in the claims, and the control unit 32 (control unit) is shown as an example of the "second electric device" in the claims. ), But the present invention is not limited to this. In the present invention, the "first electric device" in the claims may include an electric device other than the main circuit unit, and the "second electric device" in the claims may include an electric device other than the control unit. You may. Further, the main circuit room 20a is shown as an example of the "first room" in the claims, and the control room 20b is shown as an example of the "second room" in the claims. Not limited. In the present invention, the "first room" in the claims may include a room other than the main circuit room (for example, the auxiliary equipment room 20c of the above embodiment), or the "second room" in the claims may be included. May include a room other than the control room.

10 High-speed rail vehicle (railroad vehicle)
20, 120 Housing 20a Main circuit room (1st room)
20b Control room (2nd room)
22a, 23a, 24a Inner surface (inner side surface)
22b, 23b, 24b ribs (heat dissipation promotion part, heat dissipation part)
26a Wall (partition wall)
26c Wiring hole 31 Main circuit (1st electrical equipment)
32 Control unit (control unit, second electrical equipment)
32a Control plate 50 Wiring 51a, 51b, 51c Fan (Fan for room 1)
61, 62 fans (fan for the second room, heat dissipation part)
100, 200 Electric power converter for railway vehicles 126d Outer rib (heat dissipation promotion part, heat dissipation part)

Claims (7)

A housing including the first room and the second room,
A first electrical device that is arranged in the first room and includes a main circuit unit that converts electric power.
A second electric device arranged in the second chamber, which has a smaller calorific value than the first electric device, has a lower allowable temperature than the first electric device, and includes a control unit for controlling the main circuit unit. When,
A partition wall for thermally separating the first chamber and the second chamber,
A heat radiating unit provided in the second chamber for releasing the heat of the air in the second chamber,
A fan for the first room, which is arranged in the first room and circulates air in the first room, is provided.
A wiring hole through which wiring for connecting the first electric device and the second electric device passes is formed in the partition wall.
The wiring hole is a power conversion device for a railway vehicle, which is arranged at a position where air circulated in the first chamber by the fan for the first chamber flows in a direction away from the second chamber. The power conversion device for a railway vehicle according to claim 1, wherein the heat radiating unit is arranged in the second chamber and includes a fan for the second chamber that circulates air in the second chamber. The second aspect of the present invention, wherein the heat radiating portion further includes a heat radiating promoting portion that promotes the heat of the air circulated in the second chamber by the second chamber fan to be released to the outside of the housing. Power converter for railroad vehicles. 3. The heat dissipation promoting portion is arranged in an air circulation path by the fan for the second chamber, and has a plurality of ribs provided so as to project from the inner surface of the housing toward the second chamber. The power conversion device for railway vehicles described in. The power conversion device for a railway vehicle according to claim 4, wherein the plurality of ribs are integrally provided on the inner surface of the housing. The control unit is composed of a plurality of control plates extending in the vertical direction.
The second chamber fan is arranged below the control unit so as to allow air to flow between the control plates from below to above, according to any one of claims 2 to 5. The power converter for railroad vehicles described. The partition wall thermally separates the first chamber from the second chamber by blocking the air circulating in the first chamber from flowing into the second chamber by the fan for the first chamber. The power conversion device for a railroad vehicle according to any one of claims 1 to 6, which is separated.

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