CN113659806A

CN113659806A - Auxiliary converter device

Info

Publication number: CN113659806A
Application number: CN202110948447.1A
Authority: CN
Inventors: 高瀚; 孔宴伟; 李松; 王小旭; 许传磊; 韩国风; 王智勇
Original assignee: CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Current assignee: CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-11-16

Abstract

The invention discloses an auxiliary converter device, comprising: the box body, the main fan and the bottom air duct assembly; the box body partitions the interior of the box body through a first partition plate to form two closed cavities and a middle open cavity between the two closed cavities, air inlets are respectively formed in positions, located in the two closed cavities, on a top plate of the box body, and air outlets are formed in positions, located in the middle open cavity, on a bottom plate of the box body; the main fan is arranged in the middle open cavity; the bottom air channel assembly is arranged in the middle open cavity and located at the lower part of the main fan, the bottom air channel assembly is communicated with the air inlet through an air channel, cooling air enters the air channel from the air inlet and passes through the module radiating fins, the cooling air is collected to the main fan through the bottom air channel assembly, the main fan pushes the cooling air to dissipate heat of parts arranged in the middle open cavity, and the cooling air after heat dissipation is discharged out of the box body through the air outlet. The invention solves the problem of inconvenient installation and maintenance of the auxiliary converter device.

Description

Auxiliary converter device

Technical Field

The invention belongs to the technical field of urban rail transit equipment, and particularly relates to an auxiliary converter device applied to a traction system.

Background

At present that the technical level of rail transit is continuously improved, how to make the installation space and the cost of auxiliary converter constantly reduce to be convenient for install and maintain receive more and more attention, consequently, it is the technical problem who awaits the solution that develops an auxiliary converter device and designs for solving the unchangeable problem of installation and maintenance of prior art auxiliary converter device.

Traditional auxiliary converter mainly comprises module installation closed chamber and electromagnetic device, the open chamber of fan installation, and the air inlet mode mainly is last air inlet or side air inlet, and the air outlet sets up at the downside more. The integration level of the power module of the auxiliary converter in the traditional design is higher, so that the volume and the weight of the power module are larger, and inconvenience is caused to installation and maintenance; in addition, the high integration also poses a problem in that, in the case of partial functional failure, the entire module needs to be pulled out for maintenance. The traditional auxiliary converter is difficult to realize that an electromagnetic device with an open cavity is directly maintained on a vehicle due to the structural design limitation of an air duct.

For example, CN102638155B provides a centralized auxiliary variable flow device, which includes: the transformer board, the reactor board and the input reactor board are arranged in a box body (a cavity) in three layers, and the problem that the space occupied by an auxiliary converter and a charger is large due to independent design is solved, and the installation space under a vehicle is saved. But the power module of the scheme is large and inconvenient to maintain; the middle cavity electromagnetic device is difficult to realize direct maintenance on the vehicle.

For another example, CN105262324A provides an integrated converter device, which includes a first cavity, a second cavity, and a third cavity horizontally arranged in this order, wherein the first cavity includes a traction converter module and an auxiliary converter module, and the third cavity is provided with a power unit module; the second cavity is internally provided with a water cooling module for cooling various modules in the first cavity and an air cooling module for cooling various modules in the third cavity. However, the solution is the integration of different kinds of converters to achieve the miniaturization of the converter device, but does not relate to the improvement of the structure of the auxiliary converter; in the patent, a power module with high integration level is adopted, and when part of functions are failed, the power module needs to be pulled out for maintenance.

Therefore, it is desirable to develop an auxiliary converter device for a traction system that overcomes the above-mentioned drawbacks.

Disclosure of Invention

In order to solve the above-mentioned drawbacks, the present invention provides an auxiliary converter device for solving the problem of inconvenient installation and maintenance of the auxiliary converter device, wherein the auxiliary converter device comprises:

the box body is used for partitioning the interior of the box body through a first partition plate to form two closed cavities and a middle open cavity positioned between the two closed cavities, air inlets are respectively formed in positions, positioned on the two closed cavities, on a top plate of the box body, and air outlets are formed in positions, positioned on the middle open cavity, on a bottom plate of the box body;

the main fan is arranged in the middle open cavity;

the bottom air channel assembly is arranged in the middle open cavity and located on the lower portion of the main fan, the bottom air channel assembly is communicated with the air inlet through an air channel, cooling air enters the air channel from the air inlet and passes through the module radiating fins, the cooling air is collected to the main fan through the bottom air channel assembly, the main fan pushes the cooling air to radiate components installed in the middle open cavity, and the radiated cooling air is discharged out of the box body through the air outlet.

The auxiliary converter device comprises a main fan, a middle open cavity, two groups of inlet wire reactors, two groups of high-frequency transformers and two groups of three-phase reactors, wherein the inlet wire reactors are arranged on one side of the main fan, the high-frequency transformers and the three-phase reactors are arranged on the other side of the main fan, and the high-frequency transformers are close to the main fan.

The auxiliary converter device on, wherein, the both sides in middle open chamber separate through the second baffle and form high pressure input sealed chamber and output sealed chamber, set up main contactor subassembly, high pressure input subassembly and emergency power source in the high pressure input sealed chamber, set up output contactor subassembly in the output sealed chamber.

The auxiliary converter device comprises an upper auxiliary converter device, wherein a DCDC module, a charger module, an SIV module, a resonant capacitor assembly, a three-phase capacitor, an output EMI assembly and a controller assembly are arranged in the sealed cavity positioned at the upper part of the middle open cavity.

The auxiliary converter device comprises an auxiliary converter device, wherein a DCDC module, a charger module, an SIV module, a resonant capacitor assembly, a three-phase capacitor, a UVWN output assembly and a controller assembly are arranged in the sealed cavity at the lower part of the middle open cavity.

The auxiliary converter device also comprises two bottom air duct auxiliary mounting blocks which are arranged on the bottom plate of the box body.

The box body further comprises a frame and a panel, the top plate and the bottom plate are respectively arranged on the top surface and the bottom surface of the frame, and the panel, the first partition plate and the second partition plate are riveted on the frame.

The high-frequency transformer is arranged on the frame, the outlet end face of the high-frequency transformer is tightly attached to the first partition plate after being sealed by a sealing pad, and the outlet terminal of the high-frequency transformer extends into the sealing cavities at the upper part and the lower part of the middle open cavity through a connecting hole formed in the first partition plate.

The main fan is installed on the frame, the incoming line reactor is installed on the frame through an incoming line reactor installation beam, and the three-phase reactor is installed on the frame through a three-phase reactor installation beam.

The main contactor assembly and the emergency power supply are installed on one second partition plate, the high-voltage input assembly is installed on a top plate of the box body, and the output contactor assembly is installed on the other second partition plate.

The invention has the beneficial effects that: the auxiliary converter device with the integrally detachable bottom air duct with the upper air inlet and the lower air outlet is adopted, and the power module with the higher traditional integration level is detached into a plurality of power modules with small volume, light weight and good universality, so that the auxiliary converter device has the characteristics of convenience in installation and maintenance, strong universality, compact structure and light weight.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

In the drawings:

fig. 1 is a schematic view of the overall structure of an auxiliary converter device of the present invention;

fig. 2 is a schematic view of a device mounting structure of the auxiliary converter apparatus of the present invention;

FIG. 3 is a schematic view of the duct principle of the auxiliary converter apparatus of the present invention;

FIG. 4 is a schematic structural view of a bottom duct auxiliary mounting block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.

It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

Before describing in detail the various embodiments of the present invention, the core inventive concepts of the present invention are summarized and described in detail by the following several embodiments.

Referring to fig. 1 to 3, fig. 1 is a schematic diagram illustrating an overall structure of an auxiliary converter apparatus according to the present invention; fig. 2 is a schematic view of a device mounting structure of the auxiliary converter apparatus of the present invention; fig. 3 is a schematic view of the duct principle of the auxiliary converter device of the present invention. As shown in fig. 1 to 3, the auxiliary converter apparatus of the present invention includes: the box body 1, the main fan 11 and the bottom air duct component 223; the box body 1 partitions the interior of the box body 1 through a first partition plate G1 to form two closed cavities 111 and a middle open cavity 121 located between the two closed cavities 111, air inlets 211 are respectively arranged on the top plate of the box body and at positions corresponding to the two closed cavities 111, and an air outlet 222 is arranged on the bottom plate of the box body and at a position corresponding to the middle open cavity 121; the main fan 11 is arranged in the middle open cavity 121; bottom wind channel subassembly 223 is installed in middle open chamber 121 and is located the lower part of main fan 11, and bottom wind channel subassembly 223 passes through wind channel intercommunication air intake 211, and the cooling air gets into the wind channel from air intake 211 and after the module fin, collects the cooling air to main fan 11 through bottom wind channel subassembly 223, and main fan 11 promotes the cooling air and dispels the heat to the part of installing in middle open chamber 121, and the cooling air after the heat dissipation passes through air outlet 222 and discharges box 1.

Further, the middle open cavity 121 is provided with two groups of incoming line reactors 12, two groups of high-frequency transformers 13 and two groups of three-phase reactors 14, the incoming line reactors 12 are arranged on one side of the main fan 11, the high-frequency transformers 13 and the three-phase reactors 14 are arranged on the other side of the main fan 11, and the high-frequency transformers 13 are close to the main fan 11. The two sides of the middle open cavity 121 are separated by a second partition plate G2 to form a high-voltage input sealed cavity 131 and an output sealed cavity 141, the main contactor assembly 7, the high-voltage input assembly 16 and the emergency power supply 17 are arranged in the high-voltage input sealed cavity 131, and the output contactor assembly 8 is arranged in the output sealed cavity 141. The sealed cavity 111 positioned at the upper part of the middle open cavity 121 is internally provided with a DCDC module 2, a charger module 3, an SIV module 4, a resonant capacitor assembly 5, a three-phase capacitor 6, an output EMI assembly 9 and a controller assembly 10. The sealed cavity 111 located at the lower part of the middle open cavity 121 is internally provided with a DCDC module 2, a charger module 3, an SIV module 4, a resonant capacitor assembly 5, a three-phase capacitor 6, a UVWN output assembly 15 and a controller assembly 10.

Still further, the box 1 further comprises a frame and a panel, wherein the top plate and the bottom plate are respectively arranged on the top surface and the bottom surface of the frame, and the panel, the first partition plate G1 and the second partition plate G2 are riveted on the frame. The high-frequency transformer 13 is mounted on the frame, the outlet end face of the high-frequency transformer 13 is closely attached to the first partition plate G1 after being sealed by a sealing pad, and the outlet terminal of the high-frequency transformer 13 extends into the sealing cavity 111 at the upper part and the lower part of the middle open cavity 121 through a connecting hole formed in the first partition plate G1. The main fan 11 is installed on the frame, the incoming line reactor 12 is installed on the frame through an incoming line reactor installation beam, and the three-phase reactor 14 is installed on the frame through a three-phase reactor installation beam. The main contactor assembly 7 and the emergency power supply 17 are mounted on a second partition G2, the high voltage input assembly 16 is mounted on the top plate of the box 1, and the output contactor assembly 8 is mounted on another second partition G2.

Referring to fig. 1 to fig. 3, wherein the direction of the arrow in fig. 3 is the flowing direction of the cooling wind, the following description will be made to the installation and operation processes of the auxiliary converter device according to the embodiment of the present invention as follows:

the auxiliary converter device mainly comprises: the intelligent power supply comprises a box body 1, a DCDC module 2, a charger module 3, an SIV module 4, a resonant capacitor assembly 5, a three-phase capacitor assembly 6, a main contactor assembly 7, an output contactor assembly 8, an output EMI assembly 9, a controller assembly 10, a main fan 11, an inlet wire reactor 12, a high-frequency transformer 13, a three-phase reactor 14, a UVWN output assembly 15, a high-voltage input assembly 16 and an emergency power supply 17. The auxiliary converter box body 1 is integrally of a frame structure, and the whole frame is formed by welding aluminum alloy sections. The module mounting beam and the capacitor supporting beam are made of aluminum alloy plates and are welded on the whole frame, the box body panel and the middle partition plate are riveted on the frame, and the box body lifting lugs are installed in a bolt connection mode. The box body 1 is mainly divided into three large chambers, the upper and lower chambers are module installation closed chambers 111, and the middle chamber is an intermediate open chamber 121. Two closed cavities are arranged on two sides of the middle open cavity 121, and are respectively: high pressure input sealed cavity 131, output sealed cavity 141.

The module mounting airtight chamber 111 on the upper side mainly includes: the device comprises a DCDC module 2, a charger module 3, an SIV module 4, a resonant capacitor assembly 5, a three-phase capacitor 6, an output EMI assembly 9 and a controller assembly 10. The DCDC module 2, the charger module 3 and the SIV module 4 are respectively installed on a module installation beam through bolts, the module installation beam is an aluminum alloy plate bending piece, a radiating fin of the module can extend into an air duct through an opening of the module installation beam connected with the first partition plate G1, the module installation beam connected with the bottom plate is only used for supporting and fixing the module, and the module installation beam connected with the first partition plate G1 is used for installing and fixing the module and is also a part of the air duct; the DCDC module 2 and the charger module 3 share the same air duct, and the SIV module 4 independently uses one air duct. Set up air intake 211 in module radiating fin's top, air intake 211 contains filter screen mounting box and quick change filter screen and constitutes, installs in the corresponding position of box 1 top through bolt and quick lock mechanism. The resonance capacitor assembly 5 is arranged on the bottom panel of the box body 1 through bolts and is positioned between the DCDC module 2 and the SIV module 4; the high-frequency transformer 12 located in the middle open cavity 121 is mounted on the frame through bolts, the outlet end face is tightly attached to the middle partition plate after being sealed by a sealing pad, and the outlet terminal extends into the module mounting sealed cavity 111 through the opening of the middle partition plate. The copper bars are directly adopted to connect the high-frequency transformer, the resonance capacitor assembly and the modules, and the adverse effect of cable connection on the electrical parameters of the high-frequency transformer 13 is reduced. The whole controller assembly 10 is made into a rotary frame structure, a fixed end is installed on a frame of the box body 1, a rotary part is positioned in front of the SIV module 4, and the box body space is fully utilized on the premise of ensuring the normal maintenance of the SIV module 4. The output EMI assembly 9 is mounted on the panel of the upper module-mounting enclosure 111 by bolts.

The lower module mounting enclosure 111 is similar to the upper module mounting enclosure 111 except that the lower module mounting enclosure 111 does not contain the output EMI components 9 but adds the UVWN output components 15. The UVWN output module 15 is mounted to a top panel of the module-mounting airtight chamber 111 at a lower side for UVWN output to the outside.

The intermediate open cavity 121 mainly contains: the system comprises a main fan 11, two groups of incoming line reactors 12, two groups of high-frequency transformers 13 and two groups of three-phase reactors 14. The main blower 11 is directly mounted on the frame of the box 1 through bolt connection. The two groups of incoming line reactors 12 are installed on the incoming line reactor installation beams through bolt connection and then are installed on the frame of the box body 1 through the incoming line reactor installation beams; in the case assembling process, two groups of incoming line reactors 12 can be installed on an incoming line reactor installation beam, and then the incoming line reactors are integrally hoisted to the middle open cavity 121 from the upper part of the case 1 for installation; in subsequent maintenance, each incoming line reactor 12 can be detached and maintained from the lower part of the box body 1. Two groups of high-frequency transformers 13 are installed on a frame of the box body 1 through bolts, the outlet end faces are tightly attached to the middle partition plate after being sealed by the sealing pads, and the outlet terminals extend into the installation sealed cavity 111 through the opening of the middle partition plate. The two groups of three-phase reactors 14 are connected and installed on a three-phase reactor installation beam by bolts and then are installed on a frame of the box body 1 through the three-phase reactor installation beam; in the process of assembling the box body, two groups of three-phase line reactors 14 can be installed on a three-phase reactor installation beam, and then the middle open cavity 121 is integrally hoisted from the upper part of the box body 1 for installation; in the subsequent maintenance, each three-phase reactor 14 is individually removed and maintained from below the case 1.

The high-pressure input hermetic chamber 131 mainly includes: main contactor assembly 7, high voltage input assembly 16, emergency power supply 17. The main contactor assembly 7 and the emergency power supply 17 are mounted on the partition plate of the box body 1 by adopting bolt connection. The high-voltage input assembly 16 is mounted on the top plate of the box body 1 by adopting bolt connection.

The output enclosed chamber 141 contains primarily the output contactor assembly 8. The output contactor assembly 8 is mounted on the partition plate of the box body 1 by adopting bolt connection. The two groups of output UVWN are converged and output to the outside through the UVWN output assembly 15 after the output sealed cavity 141 passes through the output contactor assembly 8.

The upper and lower module installation closed cavities 111 of the auxiliary converter device designed by the invention have the same power modules, and the middle open cavity 121 contains two groups of main electromagnetic elements except the main fan 11, so that the auxiliary converter device can be operated as two relatively independent systems.

The auxiliary converter adopts a forced air cooling mode of upper air inlet and lower air outlet. A plurality of air inlets 211 are arranged at the corresponding positions of the module radiating fins at the top of the box body 1, and an air outlet 222 is arranged at the bottom of the box body close to the output sealed cavity 141. The air inlet 211 comprises a filter screen mounting box and a quick-change filter screen, and is mounted at a position corresponding to a module radiating fin at the top of the box body 1 through a bolt and a quick-lock mechanism; the air outlet 222 is a porous sheet metal part formed by processing an aluminum alloy plate, and is mounted at the bottom of the box body 1 through bolts. The whole system matches the width of the module radiating fin, namely the width of the air inlet duct, the area of the air outlet 222 and the selection type of the main fan 11 according to the thermal simulation analysis calculation result so as to meet the optimal result of module radiating.

Cooling air is sucked from the air inlet 211, filtered by the filter screen and enters the system air duct; cooling air in the air duct firstly passes through the radiating fins of the module to cool the module; after passing through the module heat dissipation fins, the cooling air is collected into the air duct of the bottom air duct assembly 223 through the air duct; the cooling air reaches the air inlet of the main fan 11 through the bottom air duct assembly 223, is sucked in through the air inlet of the main fan 11 and is thrown out by the impeller of the main fan 11 to reach the middle open cavity 121; the cooling air entering the middle open cavity 121 is pushed by the main fan 11 to sequentially cool the high-frequency transformer 13, the incoming line reactor 12 and the three-phase reactor 14, and is finally discharged from the air outlet. Because the heat dissipation requirement of the incoming line reactor 12 is the lowest, after the incoming line reactor is placed in the main fan 11, the heat dissipation requirement can be met only by stirring the airflow near the incoming line reactor 12 by the main fan 11; the high-frequency transformer 13 has the highest heat dissipation requirement and is placed at the nearest position in front of the main fan 11; a three-phase reactor 14 with relatively low heat dissipation requirements is placed behind the high-frequency transformer 13 and near the air outlet 222. Under the condition of meeting the heat dissipation requirement of the electromagnetic device in the middle open cavity 121, the main fan 11 is arranged to be close to the middle of the bottom air duct assembly 223 as much as possible, so that the distance difference from the main fan 11 to different modules is reduced.

Referring to fig. 4, fig. 4 is a schematic structural diagram of the auxiliary mounting block of the bottom air duct. As shown in fig. 4, the bottom air duct assembly 223 is mounted at the bottom of the middle open cavity 121 by bolts and is connected to the air inlet duct below the air inlet 211 by a sealing ring. With the bottom duct assembly 223 removed, all of the components of the intermediate open cavity 121 can be serviced. Two bottom air duct auxiliary installation blocks 224 are designed and arranged on the bottom plate of the box body 1, and are used for solving the problems that the bottom air duct component 223 is large in size and difficult to assemble, disassemble and operate by a single person. During installation, one end of the bottom air duct assembly 223 is firstly lapped on the bottom air duct auxiliary installation block 224, and then a fastening bolt can be installed at the other end.

In summary, the present invention has the following advantages by designing the overall structure of the auxiliary converter device and the air duct:

1. the installation and maintenance are convenient;

2. the module has small volume, strong universality and strong maintainability;

3. the air duct has reasonable structural layout and design and good heat dissipation performance;

4. compact structure and light weight.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An auxiliary converter arrangement, comprising:

the main fan is arranged in the middle open cavity;

2. The auxiliary converter device as claimed in claim 1, wherein said intermediate open cavity is provided with two sets of incoming line reactors, two sets of high frequency transformers and two sets of three phase reactors, said incoming line reactors being provided on one side of said main blower, said high frequency transformers and said three phase reactors being provided on the other side of said main blower, said high frequency transformers being close to said main blower.

3. The auxiliary converter assembly as claimed in claim 2, wherein the middle open chamber is partitioned at both sides by a second partition plate to form a high voltage input closed chamber in which the main contactor assembly, the high voltage input assembly and the emergency power supply are disposed and an output closed chamber in which the output contactor assembly is disposed.

4. The auxiliary converter assembly of claim 1, wherein said sealed cavity in the upper portion of said intermediate open cavity is provided with a DCDC module, a charger module, an SIV module, a resonant capacitor assembly, a three-phase capacitor, an output EMI assembly, and a controller assembly.

5. The auxiliary converter arrangement as claimed in claim 1, wherein a DCDC module, a charger module, an SIV module, a resonant capacitor assembly, a three-phase capacitor, a UVWN output assembly and a controller assembly are disposed in the sealed cavity at a lower portion of the intermediate open cavity.

6. The auxiliary converter device as claimed in claim 1, further comprising two auxiliary bottom duct mounting blocks mounted on a bottom plate of said case.

7. The auxiliary converter device as claimed in claim 3, wherein the case further comprises a frame and a panel, the top plate and the bottom plate are respectively mounted on the top surface and the bottom surface of the frame, and the panel, the first partition plate and the second partition plate are riveted to the frame.

8. The auxiliary converter device as claimed in claim 7, wherein the high frequency transformer is mounted on the frame, an outlet end surface of the high frequency transformer is closely attached to the first partition plate after being sealed by a sealing pad, and an outlet terminal of the high frequency transformer extends into the sealing cavity of the sealed cavity at the upper part and the lower part of the middle open cavity through a connecting hole formed in the first partition plate.

9. The auxiliary converter arrangement of claim 7, wherein said main fan is mounted to said frame, said line-in reactors are mounted to said frame by line-in reactor mounting beams, and said three-phase reactors are mounted to said frame by three-phase reactor mounting beams.

10. The auxiliary converter assembly as claimed in claim 7, wherein said main contactor assembly and said emergency power supply are mounted on one of said second partitions, said high voltage input assembly is mounted on a top panel of said housing, and said output contactor assembly is mounted on the other of said second partitions.