A traction converter

Abstract

The application provides a traction converter, wherein a fan cavity for arranging a fan is arranged in a cabinet body, module chambers for arranging converter module assemblies are symmetrically arranged at two sides of the fan cavity, an air inlet communicating with the module chambers is arranged at the top of the cabinet body, a ventilation channel communicating with the bottom of the module chambers is arranged at the bottom of the fan cavity, a DCU control cabinet chamber is arranged in the cabinet body opposite to one of the module chambers and at a position on one side of the fan cavity, a charging short circuit chamber is arranged in the cabinet body opposite to the other module chamber and at a position on the other side of the fan cavity, and an air outlet communicating with the fan cavity is arranged on the cabinet body. The traction converter can improve the integration degree of the cabinet body, ensure the good heat dissipation performance of power devices, reduce the overall weight of the converter, reduce the cost, and reduce the layout difficulty of the running parts of the vehicle bottom.

Description

Technical Field

[0001] This invention relates to the field of rail transit equipment technology, and specifically to a traction converter. Background Technology

[0002] The integration level of existing traction inverters is not high, and the heat dissipation effect of their electrical components needs to be improved. Furthermore, most of the cabinet layouts under urban rail trains currently adopt the installation method of crossbeam suspension or support, that is, the cabinet lifting lugs are first attached to the crossbeam and then connected to the side beam of the car body, resulting in heavy weight, high cost, and difficulty in the layout of the running parts under the car body. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a traction converter that can improve the integration of the housing, ensure good heat dissipation performance of the power devices, reduce the overall weight of the converter, reduce costs, and reduce the layout difficulty of the vehicle undercarriage running parts.

[0004] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0005] A traction converter includes a cabinet, wherein the cabinet has a fan cavity for arranging a fan, and module chambers for arranging converter module components are symmetrically arranged on both sides of the fan cavity. The top of the cabinet has an air inlet communicating with the module chambers, and the bottom of the fan cavity has a ventilation duct communicating with the bottom of the module chambers. The cabinet has a DCU control box chamber for arranging a circuit breaker for an internal circulation unit and a circuit breaker for a forced fan, located opposite one of the module chambers and on one side of the fan cavity. The cabinet has a charging short-circuit chamber for arranging a charging contactor, a short-circuit contactor, and a charging resistor, located opposite the other module chamber and on the other side of the fan cavity. The cabinet has an air outlet communicating with the fan cavity.

[0006] According to the traction converter of the present invention, high-power devices are positioned close to the fan cavity to reduce airflow path and increase heat dissipation. Two converter module components are symmetrically arranged to the left and right of the fan. Cold air enters the module chamber from the top of the cabinet, and heat is drawn into the fan cavity using the fan's exhaust principle. Finally, after absorbing heat from the modules, the cold air is discharged from the cabinet through the air outlet. Therefore, through a reasonable spatial design layout, the integration level of the cabinet is improved, while simultaneously considering the close arrangement of high-power devices around the fan cavity to reduce airflow path and improve heat dissipation efficiency. Furthermore, the reasonable layout of the DCU (Drive Control Unit) control chamber and charging short-circuit chamber effectively enables pre-charging of the supporting capacitor and significantly enhances the integration level of the cabinet. Further improvements to the above technical solution can be made as described below.

[0007] According to a preferred embodiment of the traction converter of the present invention, a reactor chamber for arranging reactors is provided in the cabinet body at a position opposite to the fan cavity, and a ventilation duct is provided on the side of the reactor chamber that can communicate with the side of the fan cavity and the air outlet respectively.

[0008] Furthermore, cool air enters the cabinet module compartment from the top. Utilizing the principle of fan extraction, heat is drawn into the fan chamber. Through continuous extraction, a pressure difference is created between the fan chamber and the reactor chamber, causing heat to flow from the fan chamber into the reactor chamber. Finally, after absorbing heat from the modules and reactors, the cool air is exhausted from the cabinet through the air outlet below the reactor chamber. Therefore, through a rational spatial design layout, the integration level of the cabinet is further improved, while also considering the close arrangement of high-power components around the fan chamber, reducing airflow paths and improving heat dissipation efficiency.

[0009] Furthermore, in a preferred embodiment, the air inlet is located at the top of the cabinet corresponding to the module compartment, and the air outlet is located at the bottom of the cabinet corresponding to the reactor compartment.

[0010] The above configuration further ensures a reduction in airflow path and improves heat dissipation efficiency.

[0011] Furthermore, in a preferred embodiment, the converter module assembly is provided with a module heat sink.

[0012] Each module has a heat sink for heat exchange, which can greatly increase heat dissipation efficiency.

[0013] Specifically, in a preferred embodiment, the converter module components located on both sides of the fan cavity are identical.

[0014] By installing identical converter module components on both sides of the fan cavity, the manufacturing process can be further simplified and costs can be saved.

[0015] Furthermore, in a preferred embodiment, the cabinet is provided with symmetrical mounting parts on both sides that cooperate with the side beams of the vehicle body.

[0016] By directly installing and fixing the cabinet to the side beam of the vehicle body, compared with the existing technology of first attaching the lifting lugs to the crossbeam and then attaching them to the side beam of the vehicle body, the weight can be reduced, the cost can be lowered, the layout difficulty of the running parts under the vehicle body can be reduced, and the problem of the vehicle body boundary restriction can be effectively avoided.

[0017] Specifically, in a preferred embodiment, the mounting portion includes a lifting lug structure.

[0018] The lifting lug structure is easy to install, simple in structure, and easy to process.

[0019] Specifically, in a preferred embodiment, the mounting portion includes a support structure.

[0020] Similarly, the support structure is easy to install, simple in structure, and easy to process.

[0021] Specifically, in a preferred embodiment, a centrifugal fan is provided inside the fan cavity.

[0022] Centrifugal fans can further ensure and improve heat dissipation efficiency.

[0023] Furthermore, in a preferred embodiment, both the air inlet and the air outlet are equipped with filters.

[0024] By installing filters at the air inlet and outlet, the air can be effectively purified, thus preventing the air duct from being contaminated.

[0025] Compared with the prior art, the advantages of the present invention are: it can improve the integration of the housing, ensure good heat dissipation performance of power devices, reduce the overall weight of the converter, reduce costs, and reduce the layout difficulty of the vehicle undercarriage running parts. Attached Figure Description

[0026] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0027] Figure 1 The schematic diagram illustrates the layout structure of the train undercarriage in an embodiment of the present invention;

[0028] Figure 2 The schematic diagram illustrates the overall structure of the converter according to an embodiment of the present invention;

[0029] Figure 3 The schematic diagram shows a top view of the converter according to an embodiment of the present invention;

[0030] Figure 4 This schematically illustrates the flow direction of a portion of the cold air within the inverter in an embodiment of the present invention;

[0031] Figure 5 The illustration shows the flow direction of another portion of the cold air within the inverter in an embodiment of the present invention.

[0032] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection of the present invention.

[0034] Figure 1The diagram schematically illustrates the layout of the converter 10 in the undercarriage of a train according to an embodiment of the present invention, wherein the horizontal arrow indicates the direction of train operation. Figure 2 The schematic diagram shows the overall structure of the converter 10 according to an embodiment of the present invention. Figure 3 The schematic diagram shows a top view of the converter 10 according to an embodiment of the present invention. Figure 4 The illustration shows the flow direction of a portion of the cold air within the inverter 10 in an embodiment of the present invention. Figure 5 The illustration shows another portion of the cold air flow direction within the inverter 10 in an embodiment of the present invention.

[0035] like Figures 2 to 5 As shown, the traction converter 10 of this embodiment includes a cabinet 1, wherein the cabinet 1 has a fan cavity 11 for arranging a fan, and module chambers 12 for arranging converter module components are symmetrically arranged on both sides of the fan cavity 11. The top of the cabinet 1 has an air inlet 13 communicating with the module chambers 12, and the bottom of the fan cavity 11 has a ventilation duct communicating with the bottom of the module chambers 12. Inside the cabinet 1, opposite to one of the module chambers 12 and located on one side of the fan cavity 11, there is a DCU control box chamber 18 for arranging the DCU control box, the circuit breaker of the internal circulation machine, and the circuit breaker of the forced fan. Inside the cabinet 1, opposite to the other module chamber 12 and located on the other side of the fan cavity 11, there is a charging short-circuit chamber 19 for arranging the charging contactor, the short-circuit contactor, and the charging resistor. The cabinet 1 has an air outlet 15 communicating with the fan cavity 11.

[0036] According to an embodiment of the present invention, the traction converter has high-power devices positioned close to the fan cavity to reduce airflow path and increase heat dissipation. Two converter module components are symmetrically arranged to the left and right of the fan. Cold air enters the module chamber from the top of the cabinet, and heat is drawn into the fan cavity using the fan's exhaust principle. Finally, after absorbing heat from the modules, the cold air is exhausted from the cabinet through the air outlet. Therefore, through a reasonable spatial design layout, the integration level of the cabinet is improved, while simultaneously considering the close arrangement of high-power devices around the fan cavity to reduce airflow path and improve heat dissipation efficiency. Furthermore, the reasonable layout of the DCU (Drive Control Unit) control chamber and charging short-circuit chamber effectively enables pre-charging of the supporting capacitor and significantly enhances the integration level of the cabinet.

[0037] Furthermore, in this embodiment, the converter module assembly is equipped with a module heat sink. Each module assembly has a heat sink for heat exchange, which can greatly increase the heat dissipation efficiency.

[0038] like Figures 2 to 5As shown, further in this embodiment, a reactor chamber 14 for arranging reactors is provided inside the cabinet 1, opposite to the fan cavity 11. The reactor chamber 14 has ventilation ducts on its side that connect to the side of the fan cavity 11 and the air outlet 15, respectively. Furthermore, cold air enters the cabinet module chamber from the top of the cabinet. Using the fan's extraction principle, heat is carried into the fan cavity. Through continuous extraction, a pressure difference is created between the fan cavity and the reactor chamber, causing heat to enter the reactor chamber from the fan cavity. Finally, after absorbing heat from the module and the reactor, the cold air is discharged from the cabinet through the air outlet below the reactor chamber. Therefore, through a reasonable spatial design layout, the integration level of the cabinet is further improved, and high-power devices are arranged closely around the fan cavity, reducing the airflow path and improving heat dissipation efficiency.

[0039] like Figures 2 to 5 As shown, preferably, in this embodiment, the air inlet 13 is located at the top of the cabinet 1, corresponding to the module chamber 12, and the air outlet 15 is located at the bottom of the cabinet 1, corresponding to the reactor chamber 14. This arrangement further ensures a reduced airflow path and improved heat dissipation efficiency.

[0040] Specifically, in this embodiment, the inverter module components located on both sides of the fan cavity 11 are identical. By setting identical inverter module components on both sides of the fan cavity, the manufacturing process can be further simplified and costs saved. Specifically, in this embodiment, a centrifugal fan is provided inside the fan cavity 11. The centrifugal fan can further ensure improved heat dissipation efficiency. Furthermore, in this embodiment, both the air inlet 13 and the air outlet 15 are provided with filters 17. By setting filters at the air inlet and air outlet, the air can be effectively purified, thereby preventing the air duct from being contaminated.

[0041] like Figures 1 to 5 As shown, further, in this embodiment, the cabinet 1 has symmetrical mounting portions 16 on both sides that cooperate with the vehicle body side beams. By directly installing and fixing the cabinet to the vehicle body side beams, compared with the existing installation method where the lifting lugs are first attached to the crossbeam and then to the vehicle body side beams, the weight can be reduced, the cost can be lowered, the layout difficulty of the vehicle's undercarriage running parts can be reduced, and the problem of undercarriage boundary restrictions can be effectively avoided. Specifically, in this embodiment, the mounting portion 16 includes a lifting lug structure. The lifting lug structure is easy to install, simple in structure, and easy to process. Specifically, in an embodiment not shown, the mounting portion 16 includes a support structure. Similarly, the support structure is easy to install, simple in structure, and easy to process.

[0042] As can be seen from the above embodiments, the traction converter of the present invention can not only improve the integration of the housing, but also ensure good heat dissipation performance of the power devices, reduce the overall weight of the converter, reduce costs, and reduce the layout difficulty of the vehicle undercarriage running parts.

[0043] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A traction converter, characterized in that, Including the cabinet; among which, The cabinet contains a fan chamber for accommodating a fan; symmetrical arrangement of fan chambers on both sides for arranging fans is provided. The module compartment for the converter module assembly; The top of the cabinet is provided with an air inlet that communicates with the module compartment, and the bottom of the fan cavity is provided with a ventilation duct that communicates with the bottom of the module compartment; The cabinet contains a DCU control box room located opposite one of the module rooms and on one side of the fan cavity, for arranging the DCU control box, the circuit breaker of the internal circulation machine, and the circuit breaker of the forced fan; the cabinet contains a charging short-circuit room located opposite the other module room and on the other side of the fan cavity, for arranging the charging contactor, the short-circuit contactor, and the charging resistor. The cabinet is provided with an air outlet that communicates with the fan cavity; The cabinet is provided with a reactor chamber for arranging reactors at a position opposite to the fan cavity. The side of the reactor chamber is provided with ventilation ducts that can communicate with the side of the fan cavity and the air outlet respectively. The air inlet is located at the top of the cabinet, corresponding to the module compartment; the air outlet is located at the bottom of the cabinet, corresponding to the reactor compartment. In this system, cold air enters the module compartment through the air inlet at the top of the cabinet. The fan inside the fan chamber draws air in, carrying the heat from the module compartment into the fan chamber. As the fan continuously draws air out, a pressure difference is created between the fan chamber and the reactor compartment, allowing heat to enter the reactor compartment from the fan chamber. After absorbing the heat from both the module compartment and the reactor compartment, the cold air is discharged from the cabinet through the air outlet at the bottom of the reactor compartment. The direction in which heat enters the reactor chamber from the fan cavity is opposite to the running direction of the train containing the traction converter.

2. The traction converter according to claim 1, characterized in that, The converter module assembly is equipped with a module heat sink.

3. The traction converter according to claim 1, characterized in that, The converter module components located on both sides of the fan cavity are identical.

4. The traction converter according to claim 1, characterized in that, The cabinet has symmetrical mounting parts on both sides that cooperate with the side beams of the vehicle body.

5. The traction converter according to claim 4, characterized in that, The mounting portion includes a lifting lug structure.

6. The traction converter according to claim 4, characterized in that, The mounting portion includes a support structure.

7. The traction converter according to claim 1, characterized in that, A centrifugal fan is installed inside the fan cavity.

8. The traction converter according to claim 1, characterized in that, Both the air inlet and the air outlet are equipped with filters.

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