阅读说明：本技术 牵引变流器及牵引变流器控制方法 (Traction converter and traction converter control method ) 是由 许传磊 史建强 蔡纪卫 马法运 张春磊 潘景宇 孔宴伟 杨志浩 于 2020-02-28 设计创作，主要内容包括：本发明提供一种牵引变流器,包括：壳体组件；第一电路组件,所述第一电路组件位于所述壳体组件内；功率模块,所述功率模块包括：第二电路组件,所述第二电路组件位于所述壳体组件内,所述第二电路组件与所述壳体组件相互可移动连接,所述第二电路组件与所述第一电路组件相互电连接。本发明所提供的牵引变流器,将功率模块与变流器其他电路组件进行分体连接,在对牵引变流器进行检修维护时,能够对功率模块进行移动且单独进行检修,无需进行整体拆装,提高了检修维护的便捷性。本发明还提供一种牵引变流器控制方法。(The invention provides a traction converter comprising: a housing assembly; a first circuit assembly located within the housing assembly; a power module, the power module comprising: the second circuit assembly is positioned in the shell assembly, the second circuit assembly and the shell assembly are mutually movably connected, and the second circuit assembly and the first circuit assembly are mutually and electrically connected. According to the traction converter provided by the invention, the power module is connected with other circuit assemblies of the converter in a split manner, so that the power module can be moved and independently overhauled when the traction converter is overhauled and maintained, the integral disassembly and assembly are not required, and the convenience of overhauling and maintaining is improved. The invention also provides a traction converter control method.)

1. A traction converter, comprising:

a housing assembly;

a first circuit assembly located within the housing assembly;

a power module, the power module comprising:

the second circuit assembly is positioned in the shell assembly, the second circuit assembly and the shell assembly are mutually movably connected, and the second circuit assembly and the first circuit assembly are mutually and electrically connected.

2. The traction converter of claim 1, wherein the second circuit assembly further comprises:

the composite busbar is electrically connected with the second circuit assembly, and the second circuit assembly is electrically connected with the first circuit assembly through the composite busbar.

3. The traction converter of claim 1, wherein the housing assembly comprises:

the second circuit assembly is movably connected with the support piece;

the second circuit assembly is provided with a fastening assembly, the fastening assembly is connected with the second circuit assembly, and the fastening assembly is detachably connected with the supporting piece.

4. The traction converter of claim 1, wherein the housing assembly further comprises a rail pair connected between the second circuit assembly and the housing assembly.

5. 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 includes:

the first air channel assembly is located below the second circuit assembly, the first air channel assembly dissipates heat of the second circuit assembly, the first air channel assembly and the shell assembly move mutually and are detachably connected, and the first air channel assembly is communicated with the air inlet and the air outlet.

6. The traction converter according to claim 5, further comprising:

the second air duct assembly is arranged below the first circuit assembly, radiates heat for the first circuit assembly, and is communicated with the first air duct assembly;

the second air duct assembly is provided with a fan, the fan is communicated with the second air duct assembly, and the fan blows air in the second air duct assembly to an air outlet.

7. The traction converter of claim 5, further comprising a door panel assembly, the door panel assembly comprising:

the door plate, the door plate connect in air intake department, the door plate is provided with the door wind channel, first wind channel subassembly passes through the door wind channel is linked together with the outside.

8. The traction converter of claim 7, wherein the door panel assembly further comprises:

the air volume adjusting piece is connected with the door plate and located at one end, facing the first air channel assembly, of the door air channel.

9. The traction converter according to claim 7, further comprising a filter assembly, wherein the filter assembly is connected to the door panel, the filter assembly is disposed at an end of the door duct facing outward, and the filter assembly covers the door duct.

10. The traction converter of claim 9, further comprising a temperature sensor and a control system, wherein the temperature sensor measures the temperature of the second circuit assembly, the temperature sensor is electrically interconnected with the control system, and the fan is electrically interconnected with the control system.

11. The traction converter according to claim 10, further comprising a wind speed sensor disposed at a rear side of the filter assembly, the wind speed sensor being electrically interconnected with the control system.

12. The traction converter according to any one of claims 6 to 11, wherein there are two power modules, two first air duct assemblies are symmetrically disposed on two sides of the second air duct assembly, and the two first air duct assemblies are respectively communicated with the second air duct assembly.

13. A traction converter control method using the traction converter of claim 11, comprising the steps of:

(1) the wind speed sensor measures the wind speed after passing through the filtering component to obtain wind speed data, and the wind speed data is sent to the control system;

(2) the control system acquires wind speed data and calculates air volume data according to the wind speed data;

(3) the control system sets an air volume threshold value, compares the air volume data with the air volume threshold value and judges whether the air volume is normal or not; if the air volume data is larger than the air volume threshold value, the air volume is normal, and the step (4) is executed; if the air volume data is smaller than the air volume threshold value, informing a worker to overhaul;

(4) the temperature sensor measures the temperature of the second circuit component, acquires temperature data and sends the temperature data to the control system;

(5) the control system acquires temperature data, sets a temperature threshold value and judges whether the temperature is normal or not; if the temperature data is smaller than the temperature threshold value, the temperature is normal, and the operation is ended; and (5) if the temperature data is larger than the temperature threshold value, the temperature is abnormal, the rotating speed of the fan is increased, and the step (2) is executed.

14. The traction converter control method according to claim 13, wherein the step (3) of notifying the staff of the maintenance specifically comprises the steps of:

(6) the control system acquires the state of the fan and judges the running state of the fan; if the operation is normal, executing the step (7); if the operation is failed, executing the step (8);

(7) prompting staff to clean the filtering component;

(8) and prompting a worker to check the fan fault.

Technical Field

The invention belongs to the field of traction converters for railway trains.

Background

At present, in a traction converter for a rail transit train, a power module and a support capacitor are generally designed in an integrated manner.

But the power module and the supporting capacitor which are designed integrally increase the volume and the mass of the traction converter; meanwhile, the power module and the supporting capacitor need to be integrally disassembled and assembled during later-period maintenance, and later-period maintenance is not facilitated.

Disclosure of Invention

Aiming at the technical problem that the existing converter power module is inconvenient to overhaul and maintain, the invention provides the converter, the power module is connected with other circuit assemblies of the converter in a split mode, when the traction converter is overhauled and maintained, the power module can be overhauled independently, integral disassembly and assembly are not needed, and the overhaul and maintenance convenience is improved. The invention also provides a traction converter control method, which can realize energy-saving control on the traction converter and can carry out intelligent detection.

In order to achieve the purpose, the invention adopts the following technical scheme:

a traction converter comprising:

a housing assembly;

a first circuit assembly located within the housing assembly;

a power module, the power module comprising:

the second circuit assembly is positioned in the shell assembly, the second circuit assembly and the shell assembly are mutually movably connected, and the second circuit assembly and the first circuit assembly are mutually and electrically connected.

Further, the second circuit assembly further comprises:

the composite busbar is electrically connected with the second circuit assembly, and the second circuit assembly is electrically connected with the first circuit assembly through the composite busbar.

Further, the housing assembly includes:

the second circuit assembly is movably connected with the support piece;

the second circuit assembly is provided with a fastening assembly, the fastening assembly is connected with the second circuit assembly, and the fastening assembly is detachably connected with the supporting piece.

Further, the housing assembly further comprises a guide rail pair, and the guide rail pair is connected between the second circuit assembly and the housing assembly.

Further, an air inlet and an air outlet are arranged on the shell assembly;

the power module further includes:

the first air channel assembly is located below the second circuit assembly, the first air channel assembly dissipates heat of the second circuit assembly, the first air channel assembly and the shell assembly move mutually and are detachably connected, and the first air channel assembly is communicated with the air inlet and the air outlet.

Further, still include:

the second air duct assembly is arranged below the first circuit assembly, radiates heat for the first circuit assembly, and is communicated with the first air duct assembly;

the second air duct assembly is provided with a fan, the fan is communicated with the second air duct assembly, and the fan blows air in the second air duct assembly to an air outlet.

Further, still include the door panel subassembly, the door panel subassembly includes:

the door plate, the door plate connect in air intake department, the door plate is provided with the door wind channel, first wind channel subassembly passes through the door wind channel is linked together with the outside.

Further, the door panel assembly further includes:

the air volume adjusting piece is connected with the door plate and located at one end, facing the first air channel assembly, of the door air channel.

Further, still include filtering component, filtering component with the door plant is connected, filtering component set up in the one end of door wind channel outside towards, filtering component covers the door wind channel.

Further, still include temperature sensor and control system, temperature sensor measures the temperature of second circuit assembly, temperature sensor with control system electricity each other is connected, the fan with control system electricity each other is connected.

Further, still include air velocity transducer, air velocity transducer set up in the filter component rear side, air velocity transducer with control system electricity each other is connected.

Furthermore, the number of the power modules is two, the two first air duct assemblies are symmetrically arranged on two sides of the second air duct assembly, and the two first air duct assemblies are respectively communicated with the second air duct assembly.

The invention also provides a traction converter control method, which uses the traction converter and comprises the following steps:

(1) the wind speed sensor measures the wind speed after passing through the filtering component to obtain wind speed data, and the wind speed data is sent to the control system;

(2) the control system acquires wind speed data and calculates air volume data according to the wind speed data;

(3) the control system sets an air volume threshold value, compares the air volume data with the air volume threshold value and judges whether the air volume is normal or not; if the air volume data is larger than the air volume threshold value, the air volume is normal, and the step (4) is executed; if the air volume data is smaller than the air volume threshold value, informing a worker to overhaul;

(4) the temperature sensor measures the temperature of the second circuit component, acquires temperature data and sends the temperature data to the control system;

(5) the control system acquires temperature data, sets a temperature threshold value and judges whether the temperature is normal or not; if the temperature data is smaller than the temperature threshold value, the temperature is normal, and the operation is ended; and (5) if the temperature data is larger than the temperature threshold value, the temperature is abnormal, the rotating speed of the fan is increased, and the step (2) is executed.

Further, in the step (3), notifying the staff of the overhaul specifically includes the following steps:

(6) the control system acquires the state of the fan and judges the running state of the fan; if the operation is normal, executing the step (7); if the operation is failed, executing the step (8);

(7) prompting staff to clean the filtering component;

(8) and prompting a worker to check the fan fault.

Compared with the prior art, the invention has the beneficial effects that:

1. the traction converter provided by the invention comprises a shell assembly, a first circuit assembly and a power module, wherein the power module comprises a second circuit assembly, and the second circuit assembly comprises components with higher overhauling and maintaining frequency in the traction converter. The first circuit assembly is located within the housing assembly. The second circuit assembly is positioned in the shell assembly and is mutually movably connected with the shell assembly, and the second circuit assembly is mutually and electrically connected with the first circuit assembly. When overhauing the traction converter, generally can overhaul second circuit assembly, because second circuit assembly and the mutual swing joint of casing subassembly, then can shift out casing subassembly with second circuit assembly, that is to say second circuit assembly and first circuit assembly components of a whole that can function independently are connected. And after the maintenance is finished, the second circuit assembly is moved back to the original position. The traction converter provided by the invention can be used for independently overhauling the power module without integrally dismounting, so that the convenience of overhauling and maintaining is improved.

2. According to the traction converter provided by the invention, the power module is provided with the first air duct assembly, and the first air duct assembly is communicated with the air inlet and the air outlet and used for radiating heat for the second circuit assembly. Meanwhile, the first air duct assembly and the shell assembly move mutually and are detachably connected, different first air duct assemblies can be replaced according to different heat dissipation requirements of the second circuit assembly, and the universality is improved.

3. According to the traction converter provided by the invention, the first air duct component is arranged below the second circuit component, the second air duct component is arranged below the first circuit component, the first air duct component is communicated with the second air duct component, the second air duct component is communicated with the fan, and the fan blows air in the second air duct component to the air outlet. The air inlet, the first air duct assembly, the second air duct assembly, the fan and the air outlet form a cooling air duct, cooling air enters through the air inlet, passes through the first air duct assembly and the second air duct assembly under the action of the fan, flows out of the air outlet through the fan, and dissipates heat for the first circuit assembly and the second circuit assembly. According to the traction converter provided by the invention, the cooling air channel adopts a straight-through structure, the cooling air channel has no direction change, the wind resistance is small, the cooling efficiency can be improved, and the wind noise can be reduced.

Drawings

Fig. 1 is a schematic structural diagram of a traction converter power module provided in this embodiment;

fig. 2 is a schematic bottom view of the traction converter provided in this embodiment;

FIG. 3 is a schematic diagram of a front view of the traction converter of FIG. 2;

FIG. 4 is a side cross-sectional structural schematic view of the traction converter of FIG. 2;

FIG. 5 is a first schematic view of the door panel assembly of FIG. 4;

FIG. 6 is a second schematic structural view of the door panel assembly of FIG. 4;

fig. 7 is a schematic view of a direction of a cooling airflow of the traction converter provided in this embodiment;

fig. 8 is a flowchart of a traction converter control method provided in this embodiment.

The reference numerals are explained in detail:

1. a power module; 11. a second circuit component; 111. an IGBT; 112. a drive plate; 113. a composite busbar; 114. a handle; 12. a first air duct assembly; 121. a first air duct; 122. a first seal member; 123. a second seal member; 13. a fastening assembly;

2. a housing assembly; 21. a housing body; 211. an air inlet; 212. an air outlet; 22. a support member;

3. a second air duct assembly; 31. a second air duct; 32. a third air duct; 33. a fan;

4. a door panel assembly; 41. a door panel; 411. a door duct; 42. an air volume adjustment sheet;

5. a filter assembly;

6. a first circuit component.

Detailed Description

The technical solutions in the embodiments of the present invention will be fully described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only some specific embodiments, not all embodiments, of the general technical solution of the present invention. All other embodiments, which can be derived by a person skilled in the art from the general idea of the invention, fall within the scope of protection of the invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the second circuit component in the power module in the present application includes components with low temperature tolerance, for example, components that need major overhaul and maintenance such as an IGBT and a driver board, and also includes other components that need frequent overhaul, and may be specifically selected according to actual conditions; the first circuit component refers to the remaining components of the traction converter except the second circuit component, such as a support capacitor and the like.

Aiming at the technical problem that the existing converter power module is inconvenient to overhaul and maintain, the invention provides the converter, the power module is connected with other circuit assemblies of the converter in a split mode, when the traction converter is overhauled and maintained, the power module can be overhauled independently, integral disassembly and assembly are not needed, and the overhaul and maintenance convenience is improved. The technical solution of the present invention will be specifically described with reference to specific examples.

A traction converter comprising:

a housing assembly 2;

a first circuit assembly 6, the first circuit assembly 6 being located within the housing assembly 2;

power module 1, power module 1 includes:

and a second circuit assembly 11, wherein the second circuit assembly 11 is located in the housing assembly 2, the second circuit assembly 11 is movably connected with the housing assembly 2, and the second circuit assembly 11 is electrically connected with the first circuit assembly 6.

The traction converter provided by the embodiment comprises a shell assembly 2, a first circuit assembly 6 and a power module 1, wherein the power module 1 comprises a second circuit assembly 11, and the second circuit assembly 11 is a device with high overhauling and maintaining frequency in the traction converter. The first circuit assembly 6 is located within the housing assembly 2. The second circuit assembly 11 is located in the housing assembly 2 and movably connected with the housing assembly 2, and the second circuit assembly 11 is electrically connected with the first circuit assembly 6. When the traction converter is overhauled, the second circuit assembly 11 is usually overhauled, and since the second circuit assembly 11 and the housing assembly 2 are movably connected with each other, the second circuit assembly 11 can be moved out of the housing assembly 2, that is, the second circuit assembly 11 and the first circuit assembly 6 are connected in a split manner. After the repair is completed, the second circuit assembly 11 is moved back to the original position. The traction converter that this embodiment provided can overhaul power module 1 alone, need not to carry out whole dismouting, has improved the convenience of overhauing and maintaining.

Specifically, referring to fig. 1 to 6, the traction converter provided in this embodiment 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 shell assembly 2, the second air duct assembly 3 dissipates heat for the first circuit assembly 6, the door panel assembly 4 is connected with the shell assembly 2, and the filter assembly 5 is connected with the door panel assembly 4.

More specifically, referring to fig. 2 to 4, the housing assembly 2 provides a supporting protection function for the traction converter provided in the present embodiment. 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 of the components in the housing body 21. The support 22 is disposed in the housing body 21, and the support 22 is used for supporting the power module 1.

The first circuit assembly 6 is disposed in the housing body 21. The first circuit assembly 6 includes the remaining components of the traction converter provided in this embodiment except for the power module 1, and may be, for example, a support capacitor 61.

Referring to fig. 1, a power module 1 is a key component of a traction converter. The power module 1 includes a second circuit assembly 11, a first air duct assembly 12, and a fastening assembly 13. The second circuit module 11 includes components with low temperature tolerance, for example, components such as the IGBT 111 and the driver board 112 that need major maintenance, and other components that need frequent maintenance, and may be specifically selected according to actual conditions. The second circuit component 11 is electrically connected to the first circuit component 6, so that the function of a traction converter is achieved. Preferably, the second circuit assembly 11 and the first circuit assembly 6 are electrically connected with each other through the composite busbar 113, so that stray inductance of the circuit can be effectively reduced.

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, and since the second circuit assembly 11 and the housing assembly 2 are movably connected with each other, the second circuit assembly 11 can be moved out of the housing assembly 2, that is, the second circuit assembly 11 and the first circuit assembly 6 are connected in a split manner. After the repair is completed, the second circuit assembly 11 is moved back to the original position. When the second circuit element 11 moves back to the original position, the second circuit element 11 and the first circuit element 6 can be electrically connected again through the composite busbar 113. The traction converter that this embodiment provided can overhaul power module 1 alone, need not to carry out whole dismouting, has improved the convenience of overhauing and maintaining.

The first air duct assembly 12 cools and dissipates heat for the first circuit assembly 6. Referring to fig. 1 and 4, the first air duct assembly 12 includes a first air duct 121, a first seal 122, and a second seal 123. The first air duct 121 is disposed below the second circuit assembly 11, the first air duct 121 and the housing body 21 move relatively and are detachably connected, the first air duct 121 is communicated with the air inlet 211 and the air outlet 212, and cooling air enters the first air duct 121 through the air inlet 211 and flows out of the air outlet 212, takes heat of the second circuit assembly 11 away, and cools and dissipates the heat of the second circuit assembly 11. Preferably, the first air duct 121 is detachably connected to the second circuit assembly 11, and the first air duct 121 and the housing body 21 are movably connected to each other and detachably connected to each other, so that in practical applications, different first air ducts 121 can be replaced according to different heat dissipation requirements of the second circuit assembly 11, and the universality of the power module 1 is improved. As a further preference, a guide rail pair (not shown in the drawings) is disposed between the first air duct 121 and the housing body 21, specifically, the guide rail pair is disposed between the support member 22 and the first air duct 121, and can play a role of motion guidance for the first air duct 121 and the first circuit assembly 6, so that the power module can be conveniently drawn out from the housing assembly, and further, the maintenance is facilitated. To improve the cooling performance of the first air path 121, a first sealing member 122 and a second sealing member 123 are connected to both ends of the first air path 121.

The fastening assembly 13 serves to lock and position the power module 1. Specifically, the fastening member 13 is connected to the second circuit member 11, and the fastening member 13 is detachably connected to the support member 22. Before the maintenance, the fastening assembly 13 and the supporting piece 22 are disassembled, and the second circuit assembly 11 and the first air duct assembly 12 are pulled out for maintenance; after the maintenance, the second circuit assembly 11 and the first air duct assembly 12 are pushed back to the original position, and then the fastening assembly 13 and the supporting member 22 are locked and fixed. Preferably, in order to facilitate the drawing out and pushing back of the second circuit assembly 11 and the first air duct assembly 12, the power module 1 provided in this embodiment is further provided with a handle 114.

The second air duct assembly 3 cools and dissipates heat for 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 disposed below the first circuit assembly 6 and cools and dissipates heat for the first circuit assembly 6. The second air duct 31 communicates with the first air duct 121, particularly via the second seal 123. The second sealing member 123 prevents cooling air from flowing out from the interface between the first air duct 121 and the second air duct 31, thereby ensuring cooling performance. The third air duct 32 is communicated with the second air duct 31, the fan 33 is communicated with the second air duct 31 through the third air duct 32, and the fan 33 blows air 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. Cooling air enters through the air inlet 211, under the action of the fan 33, the heat of the second circuit assembly 11 is taken away through the first air duct 121, the heat of the first circuit assembly 6 is further taken away through the second air duct 31, and then the cooling air passes through the third air duct 32 and is blown to the air outlet 212 by the fan 33, so that the cooling and heat dissipation of the first circuit assembly 6 and the second circuit assembly 11 are realized. According to the traction converter provided by the embodiment, the cooling air channel is of a straight-through structure, the cooling air channel has no direction change, the wind resistance is small, the cooling efficiency can be improved, and the wind noise can be reduced.

Preferably, in the traction converter provided in this embodiment, there are two power modules 1, that is, the power modules 1 are symmetrically arranged, the symmetrically arranged power modules 1 have two first air duct assemblies 12, and the two first air duct assemblies 12 are respectively communicated with the second air duct assembly 3. The fan 33 is installed in the middle, and the fan 33 simultaneously radiates heat for two first air duct assemblies 12, namely two power modules 1, through the second air duct assembly 3, so that the radiating efficiency is improved, and meanwhile, the design, production and assembly costs are also reduced.

Further to facilitate service and maintenance of the power module 1, the traction converter provided in this embodiment further comprises a door panel assembly 4. Referring to fig. 4 to 6, the door panel assembly 4 includes a door panel 41 and a volume tab 42. The door panel 41 is connected to the air inlet 211 of the housing body 21, the door panel 41 is provided with a door duct 411, and the first air duct assembly 12 is communicated with the outside through the door duct 411. When carrying out maintenance to power module 1, can open door plant 41, and need not to dismantle the whole traction converter that this embodiment provided, improved the convenience of maintenance. Further, in order to adjust the air volume in the cooling air duct, the door panel assembly 4 provided in this embodiment is further provided with an air volume adjustment sheet 42, the air volume adjustment sheet 42 is connected to the door panel 41, and the air volume adjustment sheet 42 is located at one end of the door air duct 411 facing the first air duct 121. The door duct 411 is communicated with the first duct 121, particularly, by the first sealing member 122, and prevents cooling air from flowing out from an interface between the door duct 411 and the first duct 121, thereby ensuring cooling performance.

The filter assembly 5 is used to filter the cooling air entering the door 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 duct 411 facing the outside, and the filter assembly 5 covers the door duct 411.

The traction converter provided by this embodiment further includes a temperature sensor and a control system (not shown in the drawings), the temperature sensor and the control system are electrically connected to each other, and the control system can acquire temperature data of the temperature sensor and perform calculation processing on the temperature data. The fan 33 is electrically interconnected with the control system. The control system can acquire the state of the fan 33 and can control the operating state of the fan 33. Therefore, the energy-saving control of the traction converter provided by the embodiment is realized.

The traction converter provided in this embodiment further includes an air velocity sensor (not shown in the drawings), which is disposed at the rear side of the filter assembly 5. Specifically, the wind speed sensor is disposed in the cooling air duct at the rear side of the filter assembly 5. The wind speed sensor can monitor the wind quantity in real time, and the rotating speed of the fan 33 is adjusted through the measured data, so that energy-saving control is realized. Simultaneously, also can detect the amount of wind, judge filtering component 5's jam condition, remind the staff to clean filtering component 5 to realize intelligent monitoring.

In order to facilitate understanding of the technical solution of the present invention, the repair and maintenance process and the heat dissipation process of the heat dissipation device of the current transformer provided in this embodiment are further described below.

The maintenance process comprises the following steps: when the traction converter is overhauled, particularly when the power module 1 is overhauled, firstly, the door panel assembly 4 is opened, then the fastening assembly 13 and the supporting piece 22 are disassembled, the second circuit assembly 11 and the first air duct assembly 12 are pulled out of the shell body 21 through the handle 114, 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 overhauled and maintained; after the maintenance is completed, the second circuit component 11 and the first air duct component 12 are pushed back to the original position through the handle 114, the second circuit component 11 is electrically connected with the first circuit component 6 through the composite busbar 113, and then the fastening component 13 and the supporting component 22 are installed and locked to reset the door panel component 4.

The heat dissipation process: referring to fig. 7, when the fan 33 is powered on, 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 further the heat of the first circuit assembly 6 is taken away through the second air duct 31, and then the cooling air passes through the third air duct 32 and is blown to the air outlet 212 by the fan 33, so that cooling heat dissipation of the first circuit assembly 6 and the second circuit assembly 11 is realized.

The embodiment further provides a traction converter control method, which specifically includes the following steps:

(1) the wind speed sensor measures the wind speed passing through the filtering component 5 to obtain wind speed data, and the wind speed data is sent to the control system;

(2) the control system acquires wind speed data and calculates air volume data according to the wind speed data;

(3) the control system sets an air volume threshold value, compares the air volume data with the air volume threshold value and judges whether the air volume is normal or not; if the air volume data is larger than the air volume threshold value, the air volume is normal, and the step (4) is executed; if the air volume data is smaller than the air volume threshold value, informing a worker to overhaul;

(4) the temperature sensor measures the temperature of the second circuit component 11, obtains temperature data and sends the temperature data to the control system;

(5) the control system acquires temperature data, sets a temperature threshold value and judges whether the temperature is normal or not; if the temperature data is smaller than the temperature threshold value, the temperature is normal, and the operation is ended; and (5) if the temperature data is larger than the temperature threshold value, the temperature is abnormal, the rotating speed of the fan 33 is increased, and the step (2) is executed.

Specifically, referring to fig. 8, first, the wind speed sensor measures the wind speed after passing through the filter assembly 5, i.e., the wind speed in the cooling air duct, and sends the wind speed data to the control system; after the control system acquires the wind speed data, calculating the wind speed data to obtain wind volume data; the control system sets an air volume threshold value to judge whether the air volume is normal or not; if the air volume data is smaller than the air volume threshold value, the air volume is abnormal, and workers are informed to overhaul; and if the air volume data is larger than the air volume threshold value, the air volume is normal, the next operation is continued, the temperature of the second circuit assembly 11 is measured, and energy-saving control is performed.

When the air volume is normal, the temperature sensor measures the temperature of the second circuit component 11 to obtain temperature data, and sends the temperature data to the control system; the control system acquires temperature data, sets a temperature threshold value and judges whether the temperature of the second circuit assembly 11 is normal or not; if the temperature data is smaller than the temperature threshold value, the temperature is normal, and the control system finishes the operation; if the temperature data is larger than the temperature threshold, the temperature is abnormal, the control system adjusts the rotating speed of the fan 33, the heat dissipation efficiency is improved, the wind speed sensor and the temperature sensor are controlled to measure again, and the control system finishes the operation until the temperature data is smaller than the temperature threshold.

Further for the convenience that improves the staff and overhaul, supplementary staff realizes intelligent monitoring to traction converter to the concrete judgement of the maintenance condition, in step (3), notifies the staff to overhaul and specifically includes following step:

(6) the control system acquires the state of the fan 33 and judges the running state of the fan 33; if the operation is normal, executing the step (7); if the operation is failed, executing the step (8);

(7) prompting staff to clean the filtering component 5;

(8) the worker is prompted to check for a failure of the fan 33.

Specifically, when the air volume data is smaller than the air volume threshold, it is determined that a fault condition occurs, and maintenance is required. When the maintenance is needed, the control system acquires the state of the fan 33, if the fan 33 runs normally, the filter assembly 5 is judged to be blocked, and workers are prompted to clean the filter assembly 5; if the fan 33 malfunctions, the malfunction is caused by abnormal operation of the fan 33, and a worker is prompted to check for the malfunction of the fan 33. The traction converter control method provided by the embodiment can assist workers in preliminary judgment of fault occurrence positions, and improves the efficiency of maintenance.