Converter

Abstract

The invention relates to the field of rail transit, and relates to a converter, which comprises a box body, a first column of space, a second column of space and a third column of space, an input module, a pre-charging module and a power unit which are connected in sequence are arranged in the first column space; a magnetic device and a first output module are arranged in the second column space, the magnetic device is located at one end, close to the input module, of the second column space, and the first output module is located at one end, away from the input module, of the second column space; a control unit, an output contactor and a second output module are arranged in the third column space, the control unit is located at the end, close to the magnetic device, of the third column space, the second output module is located at the end, away from the magnetic device, of the third column space, and the output contactor is located between the control unit and the second output module; and the heat dissipation unit is used for heat dissipation of the power unit and the magnetic device and penetrates through the first column space and the second column space. The structure is compact, the integration degree is high, and the light weight and miniaturization of the structure are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of rail transit, and particularly relates to a converter. BACKGROUND

[0002] With the emphasis on environmental protection and sustainable development worldwide, the field of rail transit is also under pressure to reduce energy consumption and emissions. As the power heart of rail transit vehicles, the performance of the permanent magnet traction system directly determines the energy consumption and operating efficiency of the train. As the core component of the system, the permanent magnet traction converter plays a key role in power conversion and power regulation.

[0003] For rail transit vehicles, expanding the vehicle body space can increase the passenger capacity, and reducing the self weight of the vehicle body can reduce energy consumption. Therefore, the permanent magnet traction converter must strictly control the volume and weight while meeting its own heat dissipation requirements, and cannot occupy too much vehicle body space, nor can it offset the energy saving results due to the increase in self weight. Due to the large power of the permanent magnet traction converter, the large heat dissipation requirement, and the large size of the device, there is a problem that the overall structure of the permanent magnet traction converter is large in size and occupies the vehicle body space. SUMMARY

[0004] In view of the deficiencies in the related art, the application provides a converter to optimize the internal structure and layout of the converter, make the structure more compact, and realize lightweight and miniaturization of the structure, so as to solve the technical problem of the permanent magnet traction converter in the prior art that the overall structure is large in size and occupies the vehicle body space.

[0005] The application provides a converter, comprising: a box body, an internal box cavity is formed, a plurality of partitions are arranged in the box cavity, and the partitions divide the box cavity into a first column space, a second column space and a third column space; an input module, a pre-charge module and a power unit connected in sequence are arranged in the first column space; magnetic devices and a first output module are arranged in the second column space, the magnetic devices are located at one end of the second column space close to the input module, and the first output module is located at one end of the second column space away from the input module; a control unit, an output contactor and a second output module are arranged in the third column space, the control unit is located at one end of the third column space close to the magnetic devices, the second output module is located at one end of the third column space away from the magnetic devices, and the output contactor is located between the control unit and the second output module; a heat dissipation unit, which is connected to the outside of the box body and passes through the first column space and the second column space, comprises a power heat dissipation assembly and a magnetic heat dissipation assembly connected to each other, the power heat dissipation assembly is attached to the power unit, and the magnetic heat dissipation assembly faces the magnetic devices.

[0006] In some embodiments, the power unit comprises: a heat sink connected to the heat dissipation unit; a power device connected to the heat sink; a capacitor connected to the power device and fixedly connected to the inner side of the box; a driving unit connected to the power device, and a plurality of driving units are respectively located on both sides of the power unit for controlling the operation of the power device.

[0007] In some embodiments, the power dissipation assembly comprises: a first air pipe located in the first column space and comprising a first air inlet and a first air outlet, the first air inlet being communicated with external air; a second air pipe extending from the first column space to the second column space and comprising a second air inlet and a second air outlet, the second air inlet being communicated with the first air outlet, and the second air outlet being communicated with the magnetic heat dissipation assembly; wherein part of the heat sink is embedded in the first air pipe, and part of the heat sink is located outside the first air pipe, the heat sink being sealingly connected to the first air pipe, and the power device being attached to the part of the heat sink located outside the first air pipe.

[0008] In some embodiments, the box is provided with an air outlet hole near the magnetic device, and the magnetic heat dissipation assembly comprises: a fan located between the magnetic device and the first output module and comprising an air inlet and an air outlet, the air inlet being connected to the second air outlet, and the air outlet being directed towards the magnetic device; a third air pipe comprising a third air inlet and a third air outlet, the third air inlet being connected to the air outlet of the fan, the third air pipe extending to the magnetic device, and the third air outlet being directed towards the magnetic device; the external air passes through the first air pipe, the second air pipe, the fan, the third air pipe and the magnetic device in sequence, and is discharged from the air outlet hole.

[0009] In some embodiments, the current transformer further comprises: a temperature sensor located in the power unit and connected to the control unit for detecting the temperature of the power device.

[0010] In some embodiments, the current transformer further comprises: a door panel located on the side of the box near the first column space and connected to the outer side wall of the box; a door panel air pipe located in the first column space and comprising an air inlet end and an air outlet end, the inner diameter of the door panel air pipe expanding from the air inlet end to the air outlet end, the air inlet end penetrating through the door panel, and the air outlet end being connected to the first air inlet, the external air entering the first air pipe through the door panel and the door panel air pipe in sequence.

[0011] In some embodiments, the current transformer further comprises: A filter is arranged on the side of the door panel away from the box body and has a mesh structure for filtering external air entering the door panel air pipe.

[0012] In some embodiments, the converter further comprises: The lifting portion comprises a plurality of lifting lugs arranged on the circumferential side of the box body.

[0013] In some embodiments, a partition is arranged between the control unit and the output contactor, and the control unit and the output contactor are arranged separately in the third column space, and the output contactor is connected with the second output module.

[0014] In some embodiments, a single or multiple power units, a pre-charge module, an output contactor and an output module are arranged inside the box body.

[0015] Based on the above technical solutions, the internal structure and layout of the converter are optimized in the embodiments of the present application, the internal devices are arranged closely, the heat dissipation unit is used to the maximum extent for heat dissipation of the power unit and the magnetic device, the converter has good heat dissipation performance in the limited space, and the converter is light and integrated. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not limit the present application. In the drawings: Figure 1 is a top view of an embodiment of the converter of the present application; Figure 2 is a side view of an embodiment of the converter of the present application; Figure 3 is a front view of an embodiment of the converter of the present application.

[0017] In the drawings: 1, box body; 2, control cavity; 3, output contactor cavity; 4, first output cavity; 5, functional unit cavity; 6, fan cavity; 7, magnetic device cavity; 8, lifting lug; 9, power unit; 10, input module; 11, pre-charge module; 12, filter; 13, magnetic device; 14, fan; 15, output contactor; 16, first output module; 17, control unit; 18, door panel; 19, third air pipe; 20, second output module; 21, second output cavity; 22, door panel air pipe; 23, power device; 24, temperature sensor; 25, drive unit; 26, capacitor; 27, first air pipe; 28, heat sink; 29, second air pipe; 30, second partition; 31, first partition; 32, sliding rail; 33, connection row. DETAILED DESCRIPTION

[0018] With reference to the accompanying drawings, the technical solutions in the embodiments will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] In the description of the present application, it should be understood that the terms "center", "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0020] The terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include one or more of the features.

[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] With the increasing emphasis on environmental protection and sustainable development worldwide, the rail transit field is facing the dual challenges of reducing energy consumption and emissions. It is necessary to achieve people's expectations of fast arrival and efficient travel, and to control operating costs.

[0023] In this context, the current design of rail transit vehicles is rapidly moving towards miniaturization and light weight. For subways, limited vehicle space needs to prioritize passenger capacity, and each additional 0.5 cubic meters of equipment space may mean a reduction of 5-8 passenger seats. For high-speed rail, each 1-ton reduction in vehicle weight can reduce energy consumption by about 5000 kilowatt-hours per year. This requires the heat dissipation system of the permanent magnet traction converter to meet the heat dissipation requirements while strictly controlling the volume and weight, and cannot occupy too much vehicle space, nor can it offset the energy-saving results due to the increase in self-weight.

[0024] The permanent magnet traction system of rail transit vehicles determines the energy consumption and operation efficiency of the train, and the permanent magnet traction converter therein bears the key role of power conversion and power regulation, and generates a large amount of heat during operation. Therefore, the daily operation and subsequent maintenance of the heat dissipation device of the permanent magnet traction converter are increasingly important.

[0025] In summary, how to break through the heat dissipation technology bottleneck under the strict constraints of miniaturization and light weight, improve the heat dissipation capacity and maintainability of the permanent magnet traction converter, not only relates to the operation reliability and energy efficiency of the train, but also directly affects whether the rail transit industry can realize the coordinated development of green low carbon and efficient operation, which undoubtedly puts forward unprecedentedly high requirements on related technical research and development.

[0026] To solve the above problems, the present application provides a converter, which is compact in structure, high in heat dissipation efficiency, simple to install, and convenient to disassemble, maintain and assemble.

[0027] As shown in the accompanying drawings, Figure 1 In one illustrative embodiment of the converter of the present application, it comprises a box body 1 and an input module 10, a pre-charge module 11, a power unit 9, a magnetic device 13, a first output module 16, a control unit 17, an output contactor 15, a second output module 20 and a heat dissipation unit inside the box body 1.

[0028] The converter is placed on the ground or mounting plane, the part close to the ground or mounting plane is the bottom of the converter, and the part away from the ground or mounting plane is the top of the converter, the bottom is below the converter, and the top is above the converter.

[0029] The box body 1 forms a box cavity inside, a plurality of first partitions 31 are arranged in the box cavity along the length direction of the box body 1, and the plurality of first partitions 31 divide the box cavity into a first column space, a second column space and a third column space.

[0030] The side of the box body 1 close to the first column space is the front end of the box body 1.

[0031] The box body 1 is formed by bending and splicing thin plate materials, which increases the size of the internal space under the limited size, and realizes the effective use of space by combining the modular layout of each device inside, thereby reducing the size and weight.

[0032] The input module 10, the pre-charge module 11 and the power unit 9 are sequentially connected in the first column space.

[0033] In the first column space, a functional unit cavity 5 is arranged.

[0034] Along the width direction of the box body 1, the input module 10, the pre-charge module 11 and the power unit 9 are sequentially arranged in the functional unit cavity 5, the functional unit cavity 5 can complete the pre-charge function and the inverter function of the converter, the input module 10, the pre-charge module 11 and the power unit 9 can complete the connection of the line in the functional unit cavity 5, reduce the number of external connection points, and optimize the functional layout.

[0035] The input module 10 can be arranged at one end of the functional unit cavity 5, or can be arranged at the top of the pre-charge module 11, thereby fully utilizing the height space of the box body 1.

[0036] The input module 10 includes a plurality of input detection related devices, forming a functional module, improving independence and portability.

[0037] The pre-charge module 11 is arranged on the side of the power unit 9 close to the input module 10, includes front-end pre-charge related switches and detection devices, has high modularization, avoids the dispersion of devices, improves space utilization, thereby realizing the corresponding functions in the case of independent modules, simplifying the interaction with other units, reducing the number of cables, and improving the disassembly and assembly efficiency. At the same time, the pre-charge module 11 is close to the power unit 9, and the connection interaction can be realized more conveniently.

[0038] Further, the pre-charge module 11 can be arranged in one or more groups according to the device requirements. The plurality of pre-charge modules 11 can be arranged in the functional unit cavity 5.

[0039] The magnetic device 13 is located at one end of the second column space close to the input module 10, and the first output module 16 is located at one end of the second column space away from the input module 10.

[0040] In the second column space, the magnetic device cavity 7, the fan cavity 6 and the first output cavity 4 are arranged.

[0041] The magnetic device cavity 7 and the first output cavity 4 are arranged in a spaced manner, and the fan cavity 6 is located between the magnetic device cavity 7 and the first output cavity 4. The fan cavity 6 is in communication with the magnetic device cavity 7, and the fan cavity 6 is isolated from the first output cavity 4.

[0042] The fan 14 is arranged in the fan cavity 6.

[0043] The magnetic device 13 is arranged in the magnetic device cavity 7.

[0044] The first output module 16 is arranged in the first output cavity 4.

[0045] The third column space is provided with a control unit 17, an output contactor 15 and a second output module 20, the control unit 17 is located at one end of the third column space close to the magnetic device 13, the second output module 20 is located at one end of the third column space away from the magnetic device 13, and the output contactor 15 is located between the control unit 17 and the second output module 20.

[0046] In the third column space, a control cavity 2, an output contactor cavity 3 and a second output cavity 21 are arranged.

[0047] The control cavity 2 is provided with a control unit 17 for overall control of the device functions and external interaction.

[0048] The output contactor cavity 3 is provided with an output contactor 15 for realizing the output function of the device.

[0049] Further, the installation type and the number of the output contactor 15 can be changed according to the actual functional requirements of the converter.

[0050] Further, the control cavity 2 and the output contactor cavity 3 are arranged in isolation, so as to avoid the influence of the normal work or failure of the output contactor cavity 3 on the control cavity 2, thereby improving the stability and safety of the converter. At the same time, the electromagnetic interference on the control unit 17 in the control cavity 2 can be reduced, and the electromagnetic compatibility of the device is improved.

[0051] The first output cavity 4 and the second output cavity 21 are arranged side by side, the first output cavity 4 is provided with a first output module 16, and the second output cavity 21 is provided with a second output module 20, wherein a plurality of devices related to device output protection and detection are arranged in the first output module 16 and the second output module 20 respectively, forming a functional module, realizing the interaction of internal functions, reducing the external connection, and improving the portability.

[0052] Further, one or both of the first output cavity 4 and the second output cavity 21 can be arranged according to the device requirements, and the first output cavity 4 and the second output cavity 21 are arranged independently, further improving the modularity.

[0053] The heat dissipation unit is communicated with the outside of the box body 1 and passes through the first column space and the second column space, and includes a power heat dissipation assembly and a magnetic heat dissipation assembly connected with each other, the power heat dissipation assembly is attached to the power unit 9, and the magnetic heat dissipation assembly faces the magnetic device 13.

[0054] Among them, the control cavity 2, the output contactor cavity 3, the first output cavity 4, the second output cavity 21 and the functional unit cavity 5 are independent sealed cavities in the box body 1, and the fan cavity 6 and the magnetic device cavity 7 are independent open cavities in the box body 1.

[0055] The orderly layout of the three-column space makes the function partition of each component clear, reduces the cross interference of internal circuits, improves the space utilization, and meets the miniaturization design requirement. The heat dissipation unit is connected to the main heat generating components, significantly enhancing the heat dissipation efficiency and avoiding the influence of overheating on the performance of the equipment. At the same time, the modular structure provides convenience for subsequent maintenance and repair, and reduces the maintenance cost.

[0056] In some embodiments, as shown in Figure 2 、 3 The power unit 9 includes a bracket, a power device 23, a capacitor 26, a heat sink 28, a connection row 33, a sliding rail 32, and a driving unit 25.

[0057] The two brackets are arranged at intervals, the top of the bracket is connected to the heat sink 28, and the bottom of the bracket is fixed to the bottom of the box 1 after the power unit 9 is installed. The power device 23, the capacitor 26, and the connection row 33 are located between the two brackets.

[0058] The heat sink 28 is connected to the heat dissipation unit. The heat sink 28 is located above the power device 23.

[0059] The heat sink 28 includes a heat conduction plate and an air-cooled heat dissipation piece, and the heat conduction plate and the air-cooled heat dissipation piece are integrated. The two ends of the heat conduction plate are connected to the top of the two brackets, respectively.

[0060] The power device 23 is connected to the heat sink 28, and further, the power device 23 is attached to the heat conduction plate of the heat sink 28. The heat of the power device 23 is conducted to the air-cooled heat dissipation piece through the heat conduction plate.

[0061] The power device 23 can be a silicon carbide device or a common silicon device. Various types of power devices 23 improve the compatibility of the power unit 9 and expand the application scenarios of the power unit 9.

[0062] The power device 23 can be compatible with the application of silicon carbide and other wide-bandgap semiconductor devices. Compared with the traditional silicon-based insulated gate bipolar transistor, the silicon carbide device has higher switching frequency, lower on-resistance, and better thermal stability, which enables the converter to convert electrical energy more efficiently, reduces energy loss, and improves power density.

[0063] The capacitor 26 is connected to the power device 23 and is fixedly connected to the inside of the box 1, and can be independently disassembled and set apart from the power unit 9, facilitating the disassembly and maintenance of the power unit 9.

[0064] Specifically, the capacitor 26 can be arranged at the bottom of the box 1. A base can be arranged between the capacitor 26 and the box 1 for mounting and fixing the capacitor 26, improving the stability of the capacitor 26.

[0065] The connecting bar 33 is bent and located between the capacitor 26 and the power device 23. The connecting bar 33 includes a first bent section and a second bent section that are connected to each other. The first bent section is connected to the power device 23, and the second bent section is provided with multiple connection points, which are connected to the capacitor 26.

[0066] The drive unit 25 is fixed on the bracket and connected to the power device 23. Multiple drive units 15 are located on both sides of the power unit 9 and are used to control the operation of the power device 23.

[0067] The power unit 9 is located in the middle of the functional unit cavity 5. Slide rails 32 are positioned on both sides of the top of the power unit 9, allowing it to be hung upside down on the top of the functional unit cavity 5. During installation or disassembly, only the connection points of the connecting strip 33 and the capacitor 26 need to be connected or disconnected, facilitating flexible assembly and disassembly and subsequent maintenance. Through the cooperation of the power device 23, the capacitor 26, and the drive unit 25, the inverter function of the converter is realized. The power unit 9 exhibits a high degree of modular integration.

[0068] To achieve a miniaturized and lightweight layout, a more efficient heat dissipation device is required to effectively dissipate heat from the components in the converter that generate heat. The housing 1 has heat dissipation units in the functional unit cavity 5 and the fan cavity 6, and the heat dissipation units are connected to the magnetic device cavity 7. The heat dissipation units are used to effectively dissipate heat from the power unit 9 and the magnetic device 13.

[0069] The power device 23 is directly connected to the heat dissipation unit, which shortens the heat dissipation path, improves the timeliness of heat dissipation, effectively protects the power device 23, and extends its service life. The reasonable layout of the drive unit 25 makes its connection with the power device 23 more convenient, reduces signal transmission delay, improves the accuracy of control of the power device 23, and thus improves the working efficiency of the entire power unit 9.

[0070] In some embodiments, the power cooling component includes: The first air duct 27 is located in the first column space and includes a first air inlet and a first air outlet. The first air inlet is connected to the outside air.

[0071] The second air duct 29 extends from the first column of space to the second column of space, and includes a second air inlet and a second air outlet. The second air inlet is connected to the first air outlet, and the second air outlet is connected to the magnetic heat dissipation component. The first air outlet of the first air duct 27 is sealed to the second air inlet of the second air duct 29.

[0072] The air-cooled heat sink of the radiator 28 is embedded inside the first air duct 27, the heat conduction plate of the radiator 28 is located outside the first air duct 27, and the radiator 28 is sealed to the first air duct 27.

[0073] Further, one side of the heat-conducting plate is connected to the outer side wall of the first air duct 27, and the other side is connected to the power device 23.

[0074] The heat sink 28 is located above the power device 23, and the heat generated by the power device 23 is transferred to the heat sink 28. The external air passes through the first air duct 27 and the second air duct 29 in turn. When passing through the first air duct 27, the external air also passes through the heat sink 28, taking away the heat of the heat sink 28, thereby achieving heat dissipation for the power device 23.

[0075] The cross-sectional area of the connection between the first air duct 27 and the second air duct 29 is smaller than the cross-sectional area of the second air duct 29. During the process of external air passing through the first air duct 27 and the second air duct 29 into the fan 14, from the connection between the first air duct 27 and the second air duct 29 into the second air duct 29, due to the change of the flow area of the external air from small to large, the wind speed entering the second air duct 29 is reduced, and the aerodynamic noise at the front end of the fan 14 is reduced.

[0076] The close fit of the first air duct 27 with the power device 23 and the arrangement of the heat sink 28 increase the heat exchange area and improve the heat dissipation efficiency of the power device 23. The second air duct 29 connects the first air duct 27 with the fan 14, forming a complete heat dissipation air flow channel, ensuring the orderly flow of external air. The addition of the fan 14 enhances the flow speed of the air, making the heat dissipation effect more significant, which can effectively cope with the large amount of heat generated by the power device 23 during high-power operation.

[0077] In some embodiments, an air outlet is provided on one side of the box 1 close to the magnetic device 13, and the magnetic heat dissipation assembly comprises: The fan 14 is located between the magnetic device 13 and the first output module 16, and includes an air inlet and an air outlet. The air inlet is connected to the second air outlet, and the air outlet faces the magnetic device 13.

[0078] The third air duct 19 includes a third air inlet and a third air outlet. The third air inlet is connected to the air outlet of the fan, and the third air outlet extends to the magnetic device 13 and faces the magnetic device 13.

[0079] The external air passes through the first air duct 27, the second air duct 29, the fan 14, the third air duct 19, and the magnetic device 13 in turn, and is discharged from the air outlet.

[0080] The fan 14 is arranged between the second air duct 29 and the third air duct 19, realizing the suction of external air from the second air duct 29 into the fan 14. The fan cavity 6 is sealingly connected to the magnetic device cavity 7, and the third air duct 19 is arranged between the fan cavity 6 and the magnetic device cavity 7. The external air discharged by the fan 14 can pass through the magnetic device 13, improving the use efficiency of the external air and enhancing the heat dissipation effect. The magnetic device cavity 7 is in communication with the outside of the box 1, and the external air is discharged from the box 1.

[0081] The third air duct 19 is arranged to enable the external air to directly act on the magnetic device 13, improve the pertinence and efficiency of heat dissipation of the magnetic device 13, and avoid the performance of the magnetic device 13 from being affected due to overheating. The air outlet hole on the cabinet 1 ensures the timely discharge of the hot air, maintains the temperature balance inside the cabinet 1, and further improves the heat dissipation effect of the entire heat dissipation system.

[0082] Further, the magnetic device cavity 7 can be communicated with the bottom of the cabinet 1, and the external air can pass through the magnetic device cavity 7 and be discharged through the side of the cabinet 1 or the bottom of the cabinet 1.

[0083] In some embodiments, the converter further comprises: The door plate 18 is located on one side of the cabinet 1 close to the first column of spaces, and is connected to the outer side wall of the cabinet 1.

[0084] The door plate air duct 22 is located in the first column of spaces and comprises an air inlet end and an air outlet end. The inner diameter of the door plate air duct 22 expands from the air inlet end to the air outlet end. The air inlet end penetrates through the door plate 18, and the air outlet end is connected to the first air inlet. The external air enters the first air duct 27 through the door plate 18 and the door plate air duct 22 in sequence.

[0085] The air outlet end of the door plate air duct 22 is sealingly connected to the first air inlet of the first air duct 27, and the first air outlet of the first air duct 27 is connected to the second air inlet of the second air duct 29, so as to ensure the sealing performance of the functional unit cavity 5 and realize the stable operation of the internal devices.

[0086] The cross-sectional area of the connection between the door plate air duct 22 and the first air duct 27 is smaller than the cross-sectional area of the door plate air duct 22. The flow area of the external air changes from large to small, thereby increasing the wind speed of the external air and improving the heat dissipation efficiency.

[0087] The expanding design of the inner diameter of the door plate air duct 22 plays a role in rectifying and equalizing the flow of the entering external air, so as to make the flow of the external air entering the first air duct 27 more stable and avoid the influence of airflow fluctuation on the heat dissipation effect. At the same time, the connection mode of the door plate 18 and the cabinet 1 facilitates the opening and closing of the door plate 18, and provides convenience for the maintenance of the internal devices of the first column of spaces.

[0088] In order to facilitate the later maintenance and assembly and disassembly, the drive unit 25 with a higher maintenance frequency is arranged in the visible area on the side of the power unit 9 and close to the door plate 18, so as to facilitate the opening of the door plate 18 for direct maintenance, thereby avoiding the need to disassemble the entire power unit 9 when the drive unit 25 is maintained, further improving the maintenance efficiency, reducing the cost of spare parts, and ensuring the reliability of the power unit 9.

[0089] In a conventional design, to ensure reliable functional connection, the heavy capacitor 26 is integrally arranged with the power unit 9. In the present application, the capacitor 26 is arranged directly below the heat sink 28, and the capacitor 26 and the power unit 9 are fixed in a split type, and only one side of the power unit 9 is functionally connected with the capacitor 26. When the power unit 9 is disassembled, the capacitor 26 does not need to be disassembled together, which facilitates disassembly and also improves the lightweight of the power unit 9. After the weight of the power unit 9 itself is reduced, it is further convenient to disassemble or transport, and the maintenance efficiency and safety are improved.

[0090] Further, the external connection points of the power unit 9 are arranged at the front end, which facilitates direct maintenance operation and improves convenience. Except for the capacitor 26, the power unit 9 is integrally arranged and molded, and the two sides are provided with sliding rails, which can be directly slid into the cabinet 1, further improving the maintenance efficiency.

[0091] In some embodiments, the converter further comprises: The filter 12 is located on the side of the door plate 18 away from the cabinet 1, and has a mesh structure for filtering external air entering the door plate air pipe 22.

[0092] The arrangement of the filter 12 avoids the entry of dust, impurities and the like into the interior of the converter, prevents them from adhering to the surfaces of the heat sink 28, power device 23 and other components, affects the heat dissipation effect and normal operation of the components, greatly reduces the probability of equipment failure due to pollution, and prolongs the maintenance cycle and service life of the equipment.

[0093] The filter 12 adopts a small-aperture filter screen plus a labyrinth filter structure to effectively filter foreign matter.

[0094] The filter 12 is located on the side of the door plate 18 away from the cabinet 1, and is in the visible area of the converter, which is strong in maintenance and can facilitate cleaning and replacement of the filter element, improving maintenance efficiency.

[0095] Further, an intelligent monitoring device adapted to the filter 12 can be arranged in the converter, which facilitates the operator to know the working condition of the filter 12 in real time, reduces the cost of manual checking and maintenance, improves the maintenance efficiency, and meets the current demand for simple and intelligent maintenance of metro vehicles.

[0096] In some embodiments, the converter further comprises: The temperature sensor 24 is located in the power device 23 and is used to detect the temperature of the power device 23.

[0097] The temperature sensor 24 is arranged near the power device 23, monitors the temperature of the power device 23 in real time, and feeds back data to the control unit 17 in real time. When the temperature monitored by the temperature sensor 24 is higher than the calibration value, it indicates that the external air speed through the heat dissipation unit is reduced, and it is judged that the filter 12 is blocked. The data information at this position is fed back to the control unit 17, and the control unit 17 sends a warning message to remind the staff to clean the filter 12.

[0098] The real-time monitoring of the temperature of the power device 23 by the temperature sensor 24 enables the control unit 17 to timely grasp the working state of the power device 23. By timely feeding back the temperature information and taking corresponding control measures, the overheating of the power device 23 can be effectively prevented, the safety and reliability of the converter operation are greatly improved, and the probability of failure shutdown caused by overheating is reduced.

[0099] The whole heat dissipation process of the converter of the embodiment of the application includes: the fan 14 is started, the external air outside the box 1 enters from the filter 12 and blocks foreign matters in the air to the filter 12, the external air enters the first air pipe 27 through the door plate 18 and the door plate air pipe 22, and then enters the second air pipe 29. The cross-sectional area of the connection part of the first air pipe 27 and the second air pipe 29 is smaller than that of the first air pipe 27. During the process of the external air from the first air pipe 27 to the second air pipe 29, the wind speed through the second air pipe 29 is increased due to the decrease of the cross-sectional area of the connection part of the first air pipe 27 and the second air pipe 29, and the heat of the radiator 28 is quickly absorbed, thereby realizing effective heat dissipation of the power unit 9.

[0100] Specifically, the heat in the functional unit cavity 5 can be conducted to the inside of the door plate air pipe 22 and the inside of the first air pipe 27 through the first air pipe 27, and then taken away with the external air, thereby realizing heat dissipation of the functional unit cavity 5. After passing through the second air pipe 29, the external air is sucked out to the fan cavity 6 by the fan 14, and the external air enters the magnetic device cavity 7 through the fan cavity 6, thereby realizing heat dissipation of the magnetic device 13. In order to improve the heat dissipation efficiency of the magnetic device 13, the third air pipe 19 is arranged to seal and connect the fan cavity 6 and the magnetic device cavity 7 in communication, so that the air discharged by the fan 14 passes through the magnetic device 13, the air volume passing through the magnetic device 13 is increased, heat dissipation is realized, the performance requirement of the fan 14 is reduced, power is reduced, and efficiency is improved. After passing through the magnetic device 13, the external air can be discharged from the bottom or side of the box 1, thereby realizing heat dissipation of the whole converter.

[0101] The heat dissipation unit of the converter has high utilization efficiency of external air, the components of the external air flow path are independently and sealingly arranged, the external air flows through all the devices that need to be cooled, so that the external air is fully utilized during the flow process, the device cost is reduced, the protection of the device is strengthened, and the service life is prolonged. At the same time, the heat dissipation capacity of the converter is also increased, and higher performance heat dissipation is realized in a compact space.

[0102] In some embodiments, the converter further comprises: The lifting part comprises a plurality of lifting lugs 8 arranged on the periphery of the box body 1.

[0103] The lifting lugs 8 are arranged on the periphery of the box body 1 and can be flexibly configured. The structure can be in the form of lifting or supporting, and the position can be set on the periphery of the box body 1 according to actual needs. In the case that the box body 1 is not changed, different installation requirements can be met by changing the structure and position of the lifting lugs 8, which improves the assembly efficiency and reduces the cost.

[0104] The reasonable distribution of the plurality of lifting lugs 8 makes the stress of the converter uniform during lifting, avoiding deformation of the box body 1 or damage to the internal components due to uneven stress. The setting of the lifting part provides a convenient way for the installation and transportation of the converter, reduces the difficulty and labor intensity of manual transportation, and improves the efficiency and safety of installation and transportation.

[0105] In some embodiments, a second partition 30 is arranged between the control unit 17 and the output contactor 15. The control unit 17 and the output contactor 15 are arranged separately in the third column space, and the output contactor 15 is connected with the second output module 20.

[0106] In the third column space, a plurality of second partitions 30 are arranged at intervals. The plurality of second partitions separate the third column space to form a control cavity 2, an output contactor cavity 3 and a second output cavity 21.

[0107] The arrangement of the partition reduces the electromagnetic interference of the output contactor 15 on the control unit 17, ensures the working stability of the control unit 17 and the accuracy of the control command, and improves the operation reliability of the entire converter. At the same time, this layout makes the functional division between components more clear, which is convenient for later maintenance and repair.

[0108] A second partition 30 can be arranged between the first output cavity and the fan cavity 6.

[0109] In some embodiments, a single or multiple power units 9, pre-charging modules 11, output contactors 15 and output modules are arranged inside the box body 1.

[0110] The configuration of single or multiple components allows the converter to flexibly adapt to different power requirements, improving its versatility and applicability, and enabling its widespread application in various types of rail transit vehicles or other industrial equipment. At the same time, the collaborative working mode of multiple components facilitates equipment expansion and upgrades, reducing the cost of later modifications.

[0111] Furthermore, the number of power units 9, pre-charge modules 11, output contactors 15, and output modules in the converter can be flexibly set according to the actual functional requirements of the converter.

[0112] The converter may include a power unit 9, a pre-charge module 11, an output contactor 15, and a first output module 16.

[0113] Alternatively, the converter may be equipped with two power units 9, a pre-charge module 11, two output contactors 15, a first output module 16, and a first and second output module 20.

[0114] Alternatively, the converter may be equipped with two power units 9, two pre-charge modules 11, two output contactors 15, a first output module 16, and a first and second output module 20.

[0115] When two power units 9 are provided, the two power units 9 can be arranged side by side in the functional unit cavity 5.

[0116] Existing designs often employ different types of converters to meet various functional requirements, resulting in numerous classifications and poor platform compatibility. This invention, without altering the structure of the housing 1 or its internal chambers, combines multiple units or modules to achieve functional modularity. This eliminates the need for significant changes to the housing 1 structure, offers high flexibility in converter function matching, and allows for the configuration of different numbers of functional modules according to actual needs. This enables standardized management, reduces redundant R&D costs, lowers production costs, and aligns with the current demands for flexible train formations and diverse functional requirements in subway systems.

[0117] Through the description of several embodiments of the converter of the present invention, it can be seen that the embodiments of the converter of the present invention have at least one or more of the following advantages: 1. The converter has a compact structure, reasonable layout, high integration, and high heat dissipation efficiency. It can dissipate heat from the converter in a limited space, realizing the integrated, lightweight, and miniaturized design of the converter structure.

[0118] 2. Each functional chamber of the converter is set up independently, and the maintenance and repair of electrical components in any chamber will not affect other chambers, thus ensuring the functional independence, reliability and maintainability of the converter.

[0119] 3. The converter realizes modular configuration of functions, different function requirements can be realized by matching different function modules, the flexibility and diversity of function matching of the converter are improved, the needs of flexible marshalling of future subways are met, and the application range of the converter is further expanded.

[0120] Finally, it should be noted that: the various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0121] The above embodiments are only used to illustrate the technical solutions of the present application but not limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical scheme of the present application, they should be covered in the technical scheme range of the present application claimed.

Claims

1. A converter, characterized in that, include: The box body has an internal cavity, and multiple first partitions are spaced apart in the cavity, which divide the cavity into a first column space, a second column space and a third column space. An input module, a pre-charge module, and a power unit are arranged sequentially within the first column space; A magnetic device and a first output module are disposed in the second column space. The magnetic device is located at one end of the second column space closer to the input module, and the first output module is located at one end of the second column space farther from the input module. A control unit, an output contactor, and a second output module are disposed in the third column space. The control unit is located at the end of the third column space closer to the magnetic device, and the second output module is located at the end of the third column space away from the magnetic device. The output contactor is located between the control unit and the second output module. The heat dissipation unit is connected to the outside of the housing and passes through the first column space and the second column space. It includes a power heat dissipation component and a magnetic heat dissipation component that are connected to each other. The power heat dissipation component is attached to the power unit, and one end of the magnetic heat dissipation component is connected to the power heat dissipation component, while the other end faces the magnetic device.

2. The converter according to claim 1, characterized in that, The power unit includes: Radiator, connected to the heat dissipation unit; Power devices are connected to the heat sink; A capacitor, connected to the power device, is fixedly connected to the inside of the housing; A drive unit is connected to the power device, and multiple drive units are located on both sides of the power unit respectively, for controlling the operation of the power device.

3. The converter according to claim 2, characterized in that, Also includes: A temperature sensor, located within the power unit and connected to the control unit, is used to detect the temperature of the power device.

4. The converter according to claim 2, characterized in that, The power heat dissipation component includes: The first air duct is located within the first column space and includes a first air inlet and a first air outlet, wherein the first air inlet is connected to the outside air. The second air duct extends from the first column space to the second column space and includes a second air inlet and a second air outlet. The second air inlet is connected to the first air outlet, and the second air outlet is connected to the magnetic heat dissipation component. In this configuration, a portion of the heat sink is embedded inside the first air duct, while another portion is located outside the first air duct. The heat sink is sealed to the first air duct, and the power device is attached to the portion of the heat sink located outside the first air duct.

5. The converter according to claim 4, characterized in that, The housing has an air vent on the side near the magnetic device, and the magnetic heat dissipation assembly includes: A fan is located between the magnetic device and the first output module, and includes an air inlet and an air outlet. The air inlet is connected to the second air outlet, and the air outlet faces the magnetic device. The third air duct includes a third air inlet and a third air outlet. The third air inlet is connected to the air outlet of the fan. The third air duct extends to the magnetic device, and the third air outlet faces the magnetic device. External air passes sequentially through the first duct, the second duct, the fan, the third duct, and the magnetic device, and is discharged through the air outlet.

6. The converter according to claim 4, characterized in that, Also includes: The door panel is located on the side of the box body closest to the first column space and is connected to the outer wall of the box body; The door panel duct, located within the first column of space, includes an air inlet and an air outlet. The inner diameter of the door panel duct expands along the direction from the air inlet to the air outlet. The air inlet penetrates the door panel, and the air outlet is connected to the first air inlet. External air passes through the door panel and the door panel duct in sequence before entering the first duct.

7. The converter according to claim 6, characterized in that, Also includes: The filter, located on the side of the door panel away from the housing, has a mesh structure and is used to filter external air entering the door panel duct.

8. The converter according to claim 1, characterized in that, Also includes: The hoisting unit includes multiple lifting lugs, which are respectively disposed on the periphery of the box body.

9. The converter according to claim 1, characterized in that, A second partition is provided between the control unit and the output contactor. The control unit and the output contactor are separated in the third column space. The output contactor is connected to the second output module.

10. The converter according to any one of claims 1-9, characterized in that, Inside the housing, one or more sets of the power unit, the pre-charge module, the output contactor, and the output module are arranged.

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