WO2021169164A1

WO2021169164A1 - Traction converter and control method therefor

Info

Publication number: WO2021169164A1
Application number: PCT/CN2020/103752
Authority: WO
Inventors: 许传磊; 史建强; 蔡纪卫; 马法运; 张春磊; 潘景宇; 孔宴伟; 杨志浩
Original assignee: 中车青岛四方车辆研究所有限公司
Priority date: 2020-02-28
Filing date: 2020-07-23
Publication date: 2021-09-02
Also published as: CO2022011163A2; CN111769722A; CN111769722B; CL2022002298A1; RS20220746A1

Abstract

The present application provides a traction converter, comprising: a housing assembly; a first circuit assembly located in the housing assembly; a power module which comprises a second circuit assembly located in the housing assembly, the second circuit assembly and the housing assembly being movably connected to each other, and the second circuit assembly and the first circuit assembly being electrically connected to each other. When the traction converter provided by the present application is overhauled and maintained, the power module can be moved and separately overhauled, without the need for overall disassembly and assembly, so that the convenience of overhaul and maintenance is improved.

Description

Traction converter and its control method

TRACTION CONVERTER AND CONTROL METHOD THEREOF

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010129996.1, and the application name is "Traction Converter and Traction Converter Control Method" on February 28, 2020, the entire content of which is incorporated by reference In this application.

Technical field

The application belongs to the field of traction converters for rail trains, and relates to a traction converter and a control method thereof.

Background technique

At present, for traction converters for rail transit trains, the power modules usually include supporting capacitors to form an integrated design. This integrated design makes the power module larger in size and mass, which is not conducive to later overhaul and maintenance.

Summary of the invention

The present application provides a traction converter and a control method thereof. By separately connecting a power module with other circuit components of the converter such as a supporting capacitor, the convenience of inspection and maintenance can be improved.

The first implementation manner of the present application provides a traction converter, including:

Shell assembly

A first circuit assembly, the first circuit assembly is located in the housing assembly;

The power module includes a second circuit assembly, the second circuit assembly is located in the housing assembly; the second circuit assembly and the housing assembly are movably connected to each other; the second circuit assembly and the first circuit assembly are electrically connected to each other.

Optionally, the first circuit component is fixedly arranged in the housing component, the first circuit component includes a supporting capacitor; and the second circuit component does not include the supporting capacitor.

Optionally, the second circuit component further includes a composite bus bar, the composite bus bar and the second circuit component are electrically connected to each other, and the second circuit component is electrically connected to the first circuit component through the composite bus bar.

Optionally, the housing assembly includes a housing body, the housing body is provided with a support, and the second circuit assembly and the support are movably connected to each other; the second circuit assembly is provided with a fastening assembly, and the fastening assembly is connected to the The second circuit component is connected, and the fastening component is detachably connected to the support.

Optionally, the housing assembly further includes a guide rail pair, which is connected between the second circuit assembly and the housing assembly.

Optionally, the housing assembly is provided with an air inlet and an air outlet; the power module further includes a first air duct assembly, the first air duct assembly is located below the second circuit assembly, and dissipates heat for the second circuit assembly; An air duct assembly and the housing assembly are mutually movable and detachably connected; the first air duct assembly is communicated with the air inlet and the air outlet.

Optionally, the housing assembly is provided with an air inlet and an air outlet; the power module further includes a first air duct assembly for dissipating heat for the second circuit assembly; the first air duct assembly and the second circuit assembly can be The first air duct assembly is connected with the air inlet and the air outlet in a detachable connection, and is mutually movable and detachably connected with the housing assembly.

Optionally, the traction converter further includes a second air duct component, the second air duct component is arranged below the first circuit component to dissipate heat for the first circuit component; the second air duct component is in communication with the first air duct component; The second air duct assembly is provided with a fan, the fan is connected with the second air duct assembly, and the fan blows the wind in the second air duct assembly to the air outlet.

Optionally, the traction converter further includes a door panel assembly, the door panel assembly includes a door panel connected to the air inlet; the door panel is provided with a door air duct, and the first air duct assembly communicates with the outside through the door air duct.

Optionally, the traction converter further includes a door panel assembly having a door panel connected to the air inlet; the second circuit assembly and/or the first air duct assembly can be removed by opening the door panel.

Optionally, the door panel assembly further includes an air volume adjustment sheet connected to the door panel; the air volume adjustment sheet is located at an end of the door air duct facing the first air duct assembly.

Optionally, the air volume adjusting sheet has a hole with an adjustable size, and the door air channel communicates with the first air channel through the hole.

Optionally, the traction converter further includes a filter assembly connected to the door panel; the filter assembly is arranged at an end of the door air duct facing the outside, and the filter assembly covers the door air duct.

Optionally, the traction converter further includes a temperature sensor and a control system, the temperature sensor measures the temperature of the second circuit component; the temperature sensor and the control system are electrically connected to each other; the fan and the control system are electrically connected to each other.

Optionally, the traction converter further includes a wind speed sensor, which is arranged on the rear side of the filter assembly; the wind speed sensor and the control system are electrically connected to each other.

Optionally, there are two power modules, the two first air duct assemblies are symmetrically arranged on both sides of the second air duct assembly, and the two first air duct assemblies are respectively communicated with the second air duct assembly.

The second embodiment of the present application provides a method for controlling a traction converter. The use of the above-mentioned traction converter includes the following steps:

The S1 wind speed sensor measures the wind speed after passing through the filter assembly, obtains wind speed data, and sends the wind speed data to the control system;

The S2 control system obtains wind speed data, and calculates air volume data based on the wind speed data;

The S3 control system sets the air volume threshold, compares the air volume data with the air volume threshold, and judges whether the air volume is normal; when the air volume data is greater than the air volume threshold, the air volume is normal, and execute S4; when the air volume data is less than the air volume threshold, notify the staff for maintenance;

The S4 temperature sensor measures the temperature of the second circuit component, obtains temperature data, and sends the temperature data to the control system;

The S5 control system obtains temperature data and sets a temperature threshold to determine whether the temperature is normal; when the temperature data is less than the temperature threshold, the temperature is normal and the operation ends; when the temperature data is greater than the temperature threshold, the temperature is abnormal, and the fan speed is increased, and S2 is executed.

Optionally, in the S3, informing staff to perform maintenance specifically includes the following steps:

The S31 control system obtains the status of the fan and judges the operation status of the fan; when the operation is normal, execute S32; when the operation fails, execute S33;

S32 prompts the staff to clean the filter assembly;

S33 prompts the staff to check the fan failure.

Compared with the prior art, the beneficial effects of this application are:

1. In the traction converter provided by at least one embodiment of the present application, the second circuit assembly is usually inspected and repaired when it is overhauled. Since the second circuit assembly and the housing assembly are movably connected to each other, the The second circuit component is moved out of the housing component, that is, the second circuit component is connected to the first circuit component separately. After the overhaul is completed, move the second circuit assembly back to the original position. The traction converter provided by the present application can separately inspect and repair the power module without the need for overall disassembly and assembly, which improves the convenience of inspection and maintenance.

2. In the traction converter provided by at least one embodiment of the present application, the power module is provided with a first air duct assembly, and the first air duct assembly is communicated with the air inlet and the air outlet to dissipate heat for the second circuit assembly. At the same time, the first air duct component and the housing component are mutually movable and detachably connected, so that different first air duct components can be replaced according to different heat dissipation requirements of the second circuit component, which improves the versatility.

3. In the traction converter provided by at least one embodiment of the present application, the cooling air duct adopts a straight-through structure, the cooling air duct has no direction change, and the wind resistance is small, which can improve cooling efficiency and reduce wind noise.

Description of the drawings

FIG. 1 is a schematic diagram of a power module of a traction converter according to an embodiment of this application;

Figure 2 is a bottom view of an embodiment of the traction converter;

Figure 3 is a front view of the traction converter in Figure 2;

Figure 4 is a cross-sectional view of the traction converter in Figure 3;

Figure 5 is a first schematic diagram of a door panel assembly according to an embodiment;

Figure 6 is a second schematic diagram of a door panel assembly according to an embodiment;

Fig. 7 is a schematic diagram of a heat dissipation airflow trend of a traction converter according to an embodiment;

Figure 8 is a schematic diagram of the connection relationship between the control system and the sensor;

Fig. 9 is a control flow chart of a traction converter according to an embodiment;

1 power module, 11 second circuit components, 111 IGBTs, 112 drive boards, 113 composite bus bars, 114 handles, 12 first air duct components, 121 first air ducts, 122 first seals, 123 second seals, 13 fastening components; 2 housing components, 21 housing body, 211 air inlets, 212 air outlets, 22 supports; 3 second air duct components, 31 second air ducts, 32 third air ducts, 33 fans; 4 Door panel components, 41 door panels, 411 door air ducts, 42 air volume adjustment sheets; 5 filter components; 6 first circuit components; 7 control systems, 8 temperature sensors, and 9 wind speed sensors.

Detailed ways

The technical solutions of the present application will be described in detail below in conjunction with specific implementations. However, it should be understood that without further description, elements, structures, and features in one implementation can also be beneficially combined with other implementations.

In the description of this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. The terms "upper", "lower", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. Unless otherwise clearly specified and limited, the terms "connected" and "connected" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or through an intermediate connection. The medium is indirectly connected, which can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

In the present application, the second circuit assembly 11 in the power module 1 includes components with low temperature tolerance, such as IGBTs, driver boards, and other components that require key maintenance, and may also include other components that require frequent maintenance. The components can be specifically selected according to actual conditions. Generally speaking, the supporting capacitor is not included; the first circuit component refers to the remaining components of the traction converter except the second circuit component, for example, the supporting capacitor is included.

An embodiment of the present application provides a traction converter, including:

Housing assembly 2;

The first circuit assembly 6 is located in the housing assembly 2; it can be fixedly arranged in the housing assembly;

The power module 1 includes a second circuit assembly 11 located in a housing assembly 2; the second circuit assembly 11 and the housing assembly 2 are movably connected to each other; the second circuit assembly 11 and the first circuit assembly 6 are electrically connected to each other.

The power module 1 is movably arranged in the housing assembly so as to be able to be removed from the housing assembly 2.

The second circuit component 11 in this embodiment is a component with a high frequency of overhaul and maintenance in the traction converter, and generally does not include the supporting capacitor 61. When the traction converter is overhauled, the second circuit assembly 11 is usually overhauled. Since the second circuit assembly 11 and the housing assembly 2 are movably connected to each other, the second circuit assembly 11 can be moved out of the housing assembly 2. , That is, the second circuit component 11 and the first circuit component 6 are separately connected. After the overhaul is completed, the second circuit component 11 is moved back to the original position. The first circuit assembly 6 in this embodiment includes relatively large supporting capacitors 61, and they are fixedly arranged in the housing assembly 2. The traction converter provided in this embodiment can separately inspect and repair the power module 1 without the need for overall disassembly and assembly, which improves the convenience of inspection and maintenance.

Specifically, referring to FIGS. 1-6, the traction converter includes a power module 1, a housing assembly 2, a second air duct assembly 3, a door panel assembly 4, a filter assembly 5, and a first circuit assembly 6. The power module 1, the first circuit assembly 6 and the second air duct assembly 3 are located in the housing assembly 2. The second air duct assembly 3 heats the first circuit assembly 6, and the door panel assembly 4 is connected with the housing assembly 2 to filter The assembly 5 is connected with the door panel assembly 4.

More specifically, referring to FIGS. 2-4, the housing assembly 2 provides support and protection for the traction converter. The housing assembly 2 includes a housing body 21 and a support 22. The housing body 21 is provided with an air inlet 211 and an air outlet 212 for dissipating heat from the components in the housing body 21. The support 22 is disposed in the housing body 21, and the power module 1 is disposed on the support 22 for supporting the power module 1.

The first circuit assembly 6 is arranged in the housing body 21. The first circuit component 6 includes the remaining components in the traction converter except the power module 1, for example, may include a supporting capacitor 61 and the like.

Referring to Figure 1, the power module 1 is a key component of the traction converter. The power module 1 includes a second circuit component 11, a first air duct component 12 and a fastening component 13. The second circuit assembly 11 includes components with low temperature tolerance, such as IGBT 111, driver board 112 and other components that need to be overhauled and maintained, or other components that need to be overhauled frequently, which can be specific according to actual conditions. choose. The second circuit component 11 and the first circuit component 6 are electrically connected to each other to realize the function of a traction converter. Optionally, the second circuit component 11 and the first circuit component 6 are electrically connected to each other through the composite busbar 113, which can effectively reduce the stray inductance of the circuit. The main realization of the composite busbar 113 is the strong electric connection; for the weak electric connection such as signal transmission in the power module, it can be realized by arranging the bus.

The second circuit assembly 11 and the housing body 21 are movably connected to each other. When the traction converter is overhauled, the second circuit assembly 11 is usually overhauled. Since the second circuit assembly 11 and the housing assembly 2 are movably connected to each other, the second circuit assembly 11 can be removed from the housing assembly 2. It is removed from the middle, that is, the second circuit component 11 and the first circuit component 6 are separately connected. After the overhaul is completed, the second circuit component 11 is moved back to the original position. When the second circuit component 11 is moved back to the original position, the second circuit component 11 and the first circuit component 6 can be electrically connected again through the composite busbar 113. In this embodiment, the power module 1 can be inspected and repaired separately, without the need for overall disassembly and assembly, which improves the convenience of inspection and maintenance.

The first air duct component 12 cools and dissipates the second circuit component 11. 1 and 4, the first air duct assembly 12 includes a first air duct 121, a first sealing member 122 and a second sealing member 123. The first air duct 121 is arranged below the second circuit assembly 11, the first air duct 121 and the housing body 21 are relatively movable and detachably connected, and the first air duct 121 communicates with the air inlet 211 and the air outlet 212 for cooling The wind enters the first air duct 121 through the air inlet 211 and then flows out from the air outlet 212 to take away the heat of the second circuit assembly 11 to cool and dissipate the second circuit assembly 11. Optionally, the first air duct 121 and the second circuit assembly 11 can be detachably connected, and the first air duct 121 and the housing body 21 can be movably and detachably connected to each other. The component 11 has different heat dissipation requirements, and a different first air duct 121 is replaced, which improves the versatility of the power module 1. On the other hand, the first air duct 121 can be moved from the housing body 21 together with the second circuit component 11 Come out to facilitate the replacement of the air duct. Optionally, a guide rail pair (not shown in the drawings) is provided between the first air duct 121 and the housing body 21. Specifically, the guide rail pair may be provided between the support 22 and the first air duct 121, The first air duct 121 and the first circuit assembly 6 play a movement guiding role, which facilitates the extraction of the power module from the housing assembly, and further facilitates maintenance. In order to improve the cooling performance of the first air duct 121 and prevent or reduce air leakage, the first sealing member 122 and the second sealing member 123 are connected to both ends of the first air duct 121.

It can be seen from the above that the first air duct assembly 12 and the second circuit assembly 11 can be movably and detachably connected to the housing assembly 2 (or the housing body 21) as a whole. In the whole, the first air duct assembly 12, especially the first air duct 121, is detachably connected to the second circuit assembly 11.

The fastening component 13 functions to lock and position the power module 1. Specifically, the fastening component 13 is connected to the second circuit component 11 on the one hand, and is detachably connected to the support 22 on the other hand. Before maintenance, disassemble the fastening assembly 13 and the support 22, pull out the second circuit assembly 11 and the first air duct assembly 12 for inspection and maintenance; after completing the inspection and maintenance, remove the second circuit assembly 11 and the first air duct assembly The track assembly 12 is pushed back to the original position, and then the fastening assembly 13 and the support 22 are locked and fixed. To facilitate pulling out and pushing back the second circuit component 11 and the first air duct component 12, the power module 1 may also be provided with a handle 114.

The second air duct assembly 3 cools and dissipates the first circuit assembly 6. Specifically, referring to FIG. 4, the second air duct assembly 3 includes a second air duct 31, a third air duct 32 and a fan 33. The second air duct 31 is arranged under the first circuit assembly 6 to cool and dissipate heat for the first circuit assembly 6. The second air duct 31 communicates with the first air duct 121, especially through the second sealing member 123. The arrangement of the second sealing member 123 prevents the cooling air from flowing out of the interface between the first air duct 121 and the second air duct 31, thereby ensuring the cooling performance. The third air duct 32 is connected to the second air duct 31, the fan 33 is connected to the second air duct 31 through the third air duct 32, and the fan 33 blows the wind in the third air duct 32 to the air outlet 212. The air inlet 211, the first air duct 121, the second air duct 31, the third air duct 32, the fan 33 and the air outlet 212 form a cooling air duct. The cooling air enters through the air inlet 211, and under the action of the fan 33, the heat of the second circuit assembly 11 is taken away through the first air duct 121, and the heat of the first circuit assembly 6 is further taken away through the second air duct 31. Then, it passes through the third air duct 32 and is blown toward the air outlet 212 by the fan 33 to realize the cooling and heat dissipation of the first circuit component 6 and the second circuit component 11. In the traction converter provided by this embodiment, the cooling air channel adopts a straight-through structure, the cooling air channel has no direction change, the wind resistance is small, and the cooling efficiency can be improved and the wind noise can be reduced.

Optionally, as shown in FIG. 4, in the traction converter provided by this embodiment, there are two power modules 1, that is, the power modules 1 are arranged symmetrically, and the symmetrically arranged power modules 1 have two first air ducts. As for the assembly 12, the two first air duct assemblies 12 communicate with the second air duct assembly 3 respectively. The fan 33 is installed in the center, and the fan 33 simultaneously dissipates heat for the two first air duct assemblies 12, that is, the two power modules 1, through the second air duct assembly 3, which improves the heat dissipation efficiency and reduces the design, production, and assembly costs at the same time.

Further, in order to facilitate the overhaul and maintenance of the power module 1, the traction converter further includes a door panel assembly 4. 4-6, the door panel assembly 4 includes a door panel 41 and an air volume adjustment piece 42. The door panel 41 is connected to the air inlet 211 of the housing body 21, and the door panel 41 is provided with a door air duct 411, and the first air duct assembly 12 communicates with the outside through the door air duct 411 (as shown in FIGS. 4 and 6). When the power module 1 is inspected and maintained, the door panel 41 can be opened without disassembling the traction converter as a whole, which improves the convenience of inspection and maintenance. In order to further adjust the air volume in the cooling air duct, the door panel assembly 4 is further provided with an air volume adjusting piece 42 which is connected to the door plate 41, and the air volume adjusting piece 42 is located at the end of the door air duct 411 facing the first air duct 121. As shown in FIG. 6, the air volume adjustment piece 42 is detachably provided on the door panel assembly 4, and the air volume adjustment piece 42 is provided with a hole 421. The adjustment of the air volume can be achieved by replacing the air volume adjusting sheet 42 with holes of different sizes. The door air duct 411 communicates with the first air duct 121 (through the hole 421), and the air ducts are sealed by the first sealing member 122 to prevent the cooling air from flowing out of the interface between the door air duct 411 and the first air duct 121, So as to ensure the cooling performance (Figure 7).

The filter assembly 5 is used to filter the cooling air entering the door air duct 411. Specifically, the filter assembly 5 is connected to the door panel 41, the filter assembly 5 is disposed at an end of the door air duct 411 facing the outside, and the filter assembly 5 covers the door air duct 411.

The traction converter provided by this embodiment, as shown in FIG. 8, may also include a control system 7 and a temperature sensor 8. The temperature sensor and the control system are electrically connected to each other. The data is calculated and processed. The fan 33 and the control system 7 are electrically connected to each other. The control system can obtain the status of the fan 33 and can control the operating status of the fan 33. So as to realize the energy-saving control of the traction converter.

The traction converter provided in this embodiment may further include a wind speed sensor 9 which is arranged on the rear side of the filter assembly 5. Specifically, the wind speed sensor is arranged in the cooling air duct, located on the rear side of the filter assembly 5; for example, in FIG. The wind speed sensor can monitor the air volume in real time, adjust the speed of the fan 33 through the measured data, and realize energy-saving control. At the same time, the air volume can also be detected, the blockage of the filter assembly 5 can be judged, and the staff are reminded to clean the filter assembly 5, so as to realize intelligent monitoring.

In order to facilitate the understanding of the technical solution of the present application, the maintenance process and the heat dissipation process of the converter heat dissipation device provided in this embodiment will be further described below.

Overhaul and maintenance process: when overhauling the traction converter, especially when overhauling the power module 1, first open the door panel assembly 4, then remove the fastening assembly 13 from the support 22, and use the handle 114 to remove the second The circuit assembly 11 and the first air duct assembly 12 are pulled out from the housing body 21, and the second circuit assembly 11 is separated from the first circuit assembly 6 through the composite busbar 113, and the second circuit assembly 11 is inspected and maintained; the inspection and maintenance are completed After that, the second circuit assembly 11 and the first air duct assembly 12 are pushed back to their original positions by the handle 114, the second circuit assembly 11 is electrically connected to the first circuit assembly 6 through the composite busbar 113, and then the fastening assembly 13 is installed It is locked on the support 22 and the door panel assembly 4 is reset.

Heat dissipation process: referring to Figure 7, the fan 33 is energized and the cooling air enters through the air inlet 211. Under the action of the fan 33, the heat of the second circuit component 11 is taken away through the first air duct 121, and further passes through the second air duct. 31 takes the heat of the first circuit assembly 6 away, and then passes through the third air duct 32, and is blown toward the air outlet 212 by the fan 33, so as to realize the cooling and heat dissipation of the first circuit assembly 6 and the second circuit assembly 11. It is worth noting that Figures 4 and 7 can be regarded as the longitudinal cross-sectional views of Figure 3. With reference to Figures 2 and 7, the wind from the third air duct is first blown upward by the fan 33, and then from the space behind the fan (not shown) Out) move down to the blowing port 212.

The second embodiment of the present application provides a method for controlling a traction converter. The use of the above-mentioned traction converter specifically includes the following steps:

The S1 wind speed sensor measures the wind speed after passing through the filter assembly 5, that is, the wind speed in the first air duct, obtains wind speed data, and sends the wind speed data to the control system;

The S4 temperature sensor measures the temperature of the second circuit component 11, obtains temperature data, and sends the temperature data to the control system;

The S5 control system obtains temperature data and sets a temperature threshold to determine whether the temperature is normal; when the temperature data is less than the temperature threshold, the temperature is normal and the operation ends; when the temperature data is greater than the temperature threshold, the temperature is abnormal, increase the fan 33 speed, and execute S2 .

Further, in order to improve the convenience of staff maintenance, assist the staff in the specific judgment of the maintenance situation, and realize the intelligent monitoring of the traction converter, in S3, informing the staff to carry out the maintenance specifically includes the following steps:

The S31 control system obtains the status of the fan 33 and judges the operation status of the fan 33; when the operation is normal, execute S32; when the operation fails, execute S33;

S32 prompts the staff to clean the filter assembly 5;

S33 prompts the staff to check the fan 33 failure.

It can be seen from the above that if the fan 33 is operating normally, it is judged that the filter assembly 5 is blocked and the staff is prompted to clean the filter assembly 5; if the fan 33 is malfunctioning, the malfunction is caused by the abnormal operation of the fan 33, and the staff is prompted to check the fan 33. For faults, refer to Figure 9 to understand the control method. The traction converter control method provided by this embodiment can assist the staff to make a preliminary judgment on the location of the fault, and improve the efficiency of maintenance.

Claims

A traction converter is characterized in that it comprises:

Shell assembly

A first circuit assembly, the first circuit assembly is located in the housing assembly;

A power module, the power module includes:

A second circuit assembly, the second circuit assembly is located in the housing assembly, the second circuit assembly and the housing assembly are movably connected to each other, the second circuit assembly and the first circuit assembly Electrically connected to each other.
The traction converter according to claim 1, wherein the first circuit component is fixedly disposed in the housing component, the first circuit component includes a supporting capacitor, and the second circuit component does not include a supporting capacitor.
The traction converter according to claim 1, wherein the housing assembly comprises a housing body, a support member is arranged in the housing body, and the second circuit assembly and the support member are movably connected to each other; The second circuit component is provided with a fastening component, the fastening component is connected with the second circuit component, and the fastening component is detachably connected with the support.
The traction converter according to claim 1, wherein the housing assembly further comprises a guide rail pair connected between the second circuit assembly and the housing assembly; the second circuit The assembly further includes a composite busbar, and the second circuit assembly is electrically connected to the first circuit assembly through the composite busbar.
The traction converter according to claim 1, wherein the housing assembly is provided with an air inlet and an air outlet; the power module further comprises a first air duct assembly, and the first air duct assembly is located in the Below the second circuit assembly, heat is dissipated for the second circuit assembly; the first air duct assembly and the housing assembly are mutually movable and detachably connected; the first air duct assembly is connected to the air inlet and the The air outlets are connected.
The traction converter according to claim 1, wherein the housing assembly is provided with an air inlet and an air outlet; the power module further comprises a first air duct assembly for dissipating heat for the second circuit assembly; the first An air duct component is detachably connected with the second circuit component, and is movably and detachably connected with the housing component; the first air duct component is communicated with the air inlet and the air outlet.
The traction converter according to claim 5 or 6, further comprising a second air duct assembly, the second air duct assembly being arranged below the first circuit assembly to dissipate heat for the first circuit assembly; The second air duct component is communicated with the first air duct component;

The second air duct assembly is provided with a fan, the fan communicates with the second air duct assembly, and the fan blows the wind in the second air duct assembly to the air outlet.
The traction converter according to claim 7, further comprising a door panel assembly, the door panel assembly includes a door panel, the door panel is connected to the air inlet, the door panel is provided with a door air duct, and the first wind The channel assembly communicates with the outside through the door air channel;

The door panel assembly further includes an air volume adjustment sheet connected to the door panel, and the air volume adjustment sheet is located at an end of the door air duct facing the first air duct assembly;

The traction converter further includes a filter assembly connected to the door panel, the filter assembly is arranged at an end of the door air duct facing the outside, and the filter assembly covers the door air duct.
The traction converter according to claim 8, further comprising a temperature sensor and a control system, the temperature sensor measures the temperature of the second circuit component, the temperature sensor and the control system are electrically connected to each other, so The fan and the control system are electrically connected to each other;

The traction converter further includes a wind speed sensor arranged on the rear side of the filter assembly, and the wind speed sensor and the control system are electrically connected to each other.
The traction converter according to claim 7, wherein there are two power modules, the two first air duct assemblies are symmetrically arranged on both sides of the second air duct assembly, and the two first air duct assemblies are symmetrically arranged on both sides of the second air duct assembly. The air duct components are respectively communicated with the second air duct components.
A method for controlling a traction converter, using the traction converter according to claim 9, which comprises the following steps:

The S1 wind speed sensor measures the wind speed after passing through the filter assembly, obtains wind speed data, and sends the wind speed data to the control system;

The S2 control system obtains wind speed data, and calculates air volume data based on the wind speed data;

The S3 control system sets the air volume threshold, compares the air volume data with the air volume threshold, and judges whether the air volume is normal; if the air volume data is greater than the air volume threshold, the air volume is normal, execute S4; if the air volume data is less than the air volume threshold, notify the staff for maintenance;

The S4 temperature sensor measures the temperature of the second circuit component, obtains temperature data, and sends the temperature data to the control system;

The S5 control system obtains temperature data and sets a temperature threshold to determine whether the temperature is normal; if the temperature data is less than the temperature threshold, the temperature is normal, and the operation ends; if the temperature data is greater than the temperature threshold, the temperature is abnormal, increase the fan speed, and execute S2.
The traction converter control method according to claim 11, wherein, in said S3, informing a staff member to perform maintenance specifically includes the following steps:

The S31 control system obtains the status of the fan and judges the operation status of the fan; if the operation is normal, execute S32; if the operation fails, execute S33;

S32 prompts the staff to clean the filter assembly;

S33 prompts the staff to check the fan failure.