Device for simulating the air-cooling environment of electric traction converter modules

Abstract

The present invention relates to a device for simulating the air-cooling environment of an electric traction converter module. The device comprises: an air source unit for generating a predetermined airflow; an air supply duct comprising an air inlet connected to the air source unit, an air outlet connected to the atmosphere, and an assembly port located between the air inlet and outlet and adapted to receive the electric traction converter module. The air supply duct is capable of fully converging the predetermined airflow output by the air source unit and then blowing it toward the electric traction converter module at a uniform speed, thereby fully simulating the actual cooling conditions of a vehicle. This allows the electric traction converter module to be tested in a favorable cooling environment, thereby improving test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of locomotives, and in particular to a device for simulating an air-cooling environment in which an electric traction converter module is located. Background Art

[0002] With rapid economic development, modern locomotives such as subways, EMUs, and high-speed trains are becoming increasingly popular. Due to their speed and convenience, they have become a common means of transportation. As a core component of modern locomotives, electric traction converter modules provide the electrical energy required by the locomotive's drive motors.

[0003] In order to ensure that modern locomotives can run safely for a long time, it is necessary to carry out quality inspection on the electric traction converter modules that are about to leave the factory. However, the inventors of this application made a creative discovery during the implementation of quality inspection that since the electric traction converter modules are forced to be air-cooled during the operation of the locomotive, the existing technology does not simulate the air-cooling environment of the electric traction converter modules during the testing of the electric traction converter modules. As a result, the quality test results of the electric traction converter modules are seriously deviated from actual applications, affecting the accuracy of product quality assessment and driving safety assessment. Summary of the Invention

[0004] In order to solve all or part of the above problems, the purpose of the present invention is to provide a device for simulating the air-cooling environment of an electric traction converter module, which can ensure that the quality test results of the electric traction converter module are closer to actual applications, thereby improving the accuracy of product quality assessment and driving safety assessment.

[0005] According to a first aspect of the present invention, there is provided a device for simulating an air-cooling environment in which an electric traction converter module is located, comprising: an air source unit for generating a predetermined airflow; an air supply duct comprising an air inlet connected to the air source unit and an air outlet connected to the atmosphere, and an assembly port provided between the air inlet and the air outlet and capable of housing the electric traction converter module.

[0006] Furthermore, the wind source unit includes a variable frequency fan.

[0007] Furthermore, the device also includes an air collecting duct for connecting the wind source unit and the air supply duct, the flow area of ​​the air collecting duct gradually decreases along the flow direction of the predetermined air flow, and the flow area of ​​the end of the air collecting duct connected to the air supply duct is smaller than the flow area of ​​the outlet of the variable frequency fan.

[0008] Furthermore, the cross-sections of the air collecting duct and the air supply duct are rectangular.

[0009] Furthermore, the device also includes a first bracket for supporting the wind source unit and a second bracket for supporting the air supply duct and the air collecting duct.

[0010] Furthermore, the device also includes a third bracket for supporting the electric traction converter module.

[0011] Furthermore, the third bracket is a liftable bracket.

[0012] Furthermore, anchor bolt holes are provided on the bottom of the first bracket, and casters are provided on the bottom of the second bracket and / or the third bracket.

[0013] Furthermore, the simulated electric traction converter module includes a heat sink fin inserted into the assembly port and a power semiconductor device attached to the heat sink fin, and the power semiconductor device is an IGBT module.

[0014] It can be seen from the above technical solution that the advantage of the present invention is that the air supply duct can fully gather the predetermined airflow output by the wind source unit, and then blow it to the electric traction converter module at a uniform wind speed, so as to fully simulate the actual working heat dissipation conditions of the vehicle, so that the electric traction converter module can be tested in a good heat dissipation environment, thereby improving the accuracy of the test; in addition, the wind source unit can control the flow rate of the predetermined airflow in the air supply duct, and can simulate different working conditions of the vehicle. For example, blowing to the electric traction converter module at different flow rates can simulate the heat dissipation conditions of the vehicle at a certain specific temperature during operation; or blowing to the electric traction converter module at a specific flow rate can simulate the heat dissipation conditions of the vehicle at a certain wind speed during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings:

[0016] Figure 1 Schematic diagram of the structure of a device for simulating an air-cooling environment in which an electric traction converter module is located according to an embodiment of the present invention;

[0017] Figure 2 Shows Figure 1 The device and electric traction converter module shown, wherein the electric traction converter module is not installed in the device;

[0018] Figure 3 Also shows Figure 1 The device and electric traction converter module shown are installed in the device.

[0019] In the drawings, like parts are given like reference numerals, but the drawings are not necessarily drawn to scale. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the present embodiment will be further described below in conjunction with the drawings in the embodiments of the present application.

[0021] Figure 1 Schematic diagram of the structure of a device for simulating an air-cooling environment in which an electric traction converter module is located according to an embodiment of the present invention; Figure 2 and Figure 3 All showed Figure 1 The device and electric traction converter module shown. Figures 1 to 3 As shown, the device 100 is used to simulate the air-cooled environment of an electric traction converter module 200, wherein the simulated electric traction converter module includes a heat sink 200a that can be installed in the assembly port 32 (see below for details) and a power semiconductor device 200b attached to the heat sink 200a and located outside the device 100. The power semiconductor device is preferably an IGBT module. The IGBT module mainly includes an IGBT chip, which is mainly composed of a plurality of sequentially adjacent insulated gate bipolar transistor structures (Insulated Gate Bipolar Transistor, or IGBT in English). As the core component of the electric traction converter module, the performance of the power semiconductor device 200b directly determines the product quality of the electric traction converter module. Therefore, during the quality test process, the performance parameter changes of the power semiconductor device 200b under different heat dissipation conditions are mainly tested to evaluate the product quality of the electric traction converter module.

[0022] The device 100 includes a wind source unit 1 and an air supply duct 3. The wind source unit 1 is used to generate a predetermined airflow. The air supply duct 3 includes an air inlet connected to the wind source unit 1 and an air outlet 31 connected to the atmosphere, as well as an assembly port 32 provided between the air inlet and the air outlet 31 and capable of receiving an electric traction converter module. The device 100 can simulate the air-cooling environment in which the electric traction converter module 200 is located when in operation, ensuring that the quality test results of the electric traction converter module 200 are closer to actual applications, thereby improving the accuracy of product quality assessment and driving safety assessment. In addition, the device 100 has a simple structure, is easy to assemble and disassemble, does not require manual lifting, is safe and efficient to use, and is easy to implement and promote.

[0023] The wind source unit 1 is a device capable of generating wind, such as a variable-frequency fan or a conventional fan. Preferably, the wind source unit 1 includes a variable-frequency fan capable of generating controllable wind energy. By controlling the power supply frequency, the fan's speed is controlled, enabling precise control of air volume to meet varying heat dissipation requirements. This means that when the locomotive is accelerating, decelerating, or at a constant speed, the wind environment experienced by the electric traction converter module 200 can be simulated using the variable-frequency fan, ensuring that the quality testing results of the electric traction converter module 200 are more closely aligned with actual applications.

[0024] In some embodiments, the variable frequency fan is electrically connected to a variable frequency controller (not shown). A variable frequency fan maintains a constant speed at the same power frequency. Therefore, varying the power frequency through the variable frequency controller can produce different fan speeds, enabling precise control of ventilation air volume and meeting varying cooling requirements. The variable frequency controller can, depending on the settings, convert the 50 Hz grid voltage frequency into an adjustable power frequency within a range of 0 to 50 Hz.

[0025] The variable frequency controller can be used to operate the variable frequency fan at a fixed wind speed, thereby simulating the heat dissipation conditions of a vehicle at a specific wind speed. By testing the electric traction converter module under this heat dissipation condition, the operating conditions of the power semiconductor device 200b at this wind speed can be determined.

[0026] Furthermore, the wind speed of the variable frequency fan is changed by a variable frequency controller, so that the operating conditions of the power semiconductor device 200b at different wind speeds can be obtained.

[0027] Furthermore, the electric traction converter module heat dissipation test device of the present invention can also simulate the heat dissipation conditions of a vehicle at a specific temperature. For example, during vehicle operation, the power semiconductor device 200b may be exposed to temperatures such as 60°C or 80°C. By recreating the actual heat dissipation conditions of the electric traction converter module in the laboratory, the operating conditions of the power semiconductor device 200b at different temperatures can be determined, providing guidance for the design and implementation of the power semiconductor device 200b.

[0028] To achieve the aforementioned goal of simulating specific temperature heat dissipation conditions, the electric traction converter module heat dissipation test device of the present invention may further include a temperature acquisition module (not shown). This temperature acquisition module is disposed on the power semiconductor device 200b and is used to obtain the temperature of the power semiconductor device 200b. The temperature acquisition module may be a temperature sensor.

[0029] Furthermore, the temperature acquisition module is electrically connected to the frequency conversion controller, thereby feeding back the collected temperature signal to the frequency conversion controller. The frequency conversion controller can thus control the wind speed of the frequency conversion fan based on the temperature obtained by the temperature acquisition module, thereby maintaining the temperature of the power semiconductor device 200b at a specific temperature or within a specific temperature range. For example, when the temperature of the power semiconductor device 200b collected by the temperature acquisition module is higher than a certain temperature, the frequency conversion controller controls the wind speed of the frequency conversion fan to reduce the temperature of the power semiconductor device 200b to the certain temperature; when the temperature of the power semiconductor device 200b collected by the temperature acquisition module is lower than the certain temperature, the frequency conversion controller controls the wind speed of the frequency conversion fan to increase the temperature of the power semiconductor device 200b to the certain temperature. By testing the power semiconductor device 200b under different heat dissipation conditions, its operating conditions at different temperatures can be obtained, thereby providing guidance for the actual operation of the vehicle.

[0030] exist Figure 1 In the preferred embodiment shown, the device 100 further includes an air collection duct 4 for connecting the air source unit 1 and the air supply duct 3. The flow area of ​​the air collection duct 4 gradually decreases along the flow direction of the predetermined airflow. The flow area of ​​the end of the air collection duct 4 connected to the air supply duct 3 (i.e., the air outlet) is smaller than the flow area of ​​the outlet of the variable frequency blower. In this manner, the air generated by the variable frequency blower can be better collected and evenly delivered to the air supply duct 3, ensuring uniform air distribution within the air supply duct 3. The air collection duct 4 and the air supply duct 3 can be circular or rectangular ducts, or even ducts with irregular polygonal cross-sections. In this embodiment, to reduce pipe manufacturing costs, the air supply duct 3 is preferably a rectangular duct, i.e., its cross-section is rectangular. It should be noted that the size and orientation of the assembly opening 32 are determined based on the parameters of the heat sink fins 200a in the electric traction converter module 200 to be tested. In actual operation, the assembly opening 32 mates with the flange of the electric traction converter module 200 to be tested to reduce air leakage.

[0031] exist Figure 1In the preferred embodiment shown, the device 100 also includes a first bracket 21 for supporting the wind source unit 1. Anchor bolt holes are provided at the bottom of the first bracket 21, which are used to secure the first bracket 21 to the ground with the anchor bolts, thereby reducing vibration during operation of the variable frequency blower. The device 100 also includes a second bracket 22 for supporting the air supply duct 3 and the air collection duct 4. Casters 221 may be provided at the bottom of the second bracket 22 to facilitate rapid movement and coordination with the variable frequency blower. The device 100 also includes a third bracket 23 for supporting the electric traction converter module. The third bracket 23 is preferably a liftable bracket, and preferably has casters 231 at its bottom to reduce the labor required of the operator to move the electric traction converter module 200. The first bracket 21, the second bracket 22, and the third bracket 23 are all constructed by welding multiple beams together. The beams are preferably steel pipes, channel steel, or angle irons.

[0032] Next, the use process of the device 100 for simulating the air-cooling environment of the electric traction converter module 200 according to an embodiment of the present invention is introduced. Before performing a power-on test on the electric traction converter module 200, it is necessary to collect the wind speed and its changes in the environment in which the electric traction converter module is located under different operating conditions of the locomotive, and construct an adjustment plan for the power supply frequency of the variable frequency fan based on the collected information to ensure that the simulated wind environment is close to the wind environment encountered by the electric traction converter module 200 during the operation of the locomotive.

[0033] like Figure 2 As shown, after the preparation work is completed, the electric traction converter module 200 to be tested is placed on the third bracket 23 , and the third bracket 23 is used to adjust the height of the heat dissipation fins 200 a of the electric traction converter module 200 to be consistent with the height of the assembly opening 32 .

[0034] like Figure 3 As shown, the third bracket 23 is moved to deliver the heat dissipation fin 200a in the electric traction converter module 200 to be tested into and confine it in the assembly port 32, the variable frequency fan is started, and the power frequency of the variable frequency fan is controlled according to the adjustment plan. Then, the electric traction converter module 200 is tested by dedicated existing testing equipment, especially the power semiconductor device 200b is powered on to complete the product quality assessment and driving safety assessment.

[0035] In summary, the device 100 for simulating the air-cooling environment of an electric traction converter module according to an embodiment of the present invention can ensure that the quality test results of the electric traction converter module are closer to actual applications, thereby improving the accuracy of product quality assessment and driving safety assessment.

[0036] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0037] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0038] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily make changes or modifications within the technical scope disclosed in the present invention, and such changes or modifications should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims. As long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A device for simulating the air-cooling environment of an electric traction converter module, characterized in that: include: An air source unit, configured to generate a predetermined airflow; An air supply duct, comprising an air inlet connected to the air source unit and an air outlet connected to the atmosphere, and an assembly port located between the air inlet and the air outlet and capable of receiving the electric traction converter module; the electric traction converter module comprises heat dissipation fins and power semiconductor devices attached to the heat dissipation fins, the assembly port being located on the side of the air supply duct in the direction of flow of a predetermined airflow, the assembly port being capable of receiving the heat dissipation fins and cooperating with a flange of the electric traction converter module, the power semiconductor devices being located outside the device; the air source unit comprising a variable frequency fan, the variable frequency fan being operated at a fixed wind speed by a variable frequency controller, thereby simulating the heat dissipation conditions of a vehicle at a specific wind speed to obtain the operating conditions of the power semiconductor devices at that wind speed; the wind speed of the variable frequency fan being varied by the variable frequency controller to obtain the operating conditions of the power semiconductor devices at different wind speeds; It also includes an air collecting duct for connecting the air source unit and the air supply duct, wherein the flow area of ​​the air collecting duct gradually decreases along the flow direction of the predetermined air flow, and the flow area of ​​the end of the air collecting duct connected to the air supply duct is smaller than the flow area of ​​the outlet of the variable frequency fan; It also includes a third bracket for supporting the electric traction converter module, and after the heat dissipation fin is fed into and confined in the assembly opening, the third bracket supports the power semiconductor device of the electric traction converter module; The third bracket is a liftable bracket, and casters are provided at the bottom of the third bracket.

2. The device for simulating the air-cooling environment of an electric traction converter module according to claim 1, characterized in that: The cross sections of the air collecting duct and the air supply duct are rectangular.

3. The device for simulating the air-cooling environment of an electric traction converter module according to claim 1, characterized in that: It also includes a first bracket for supporting the wind source unit, and a second bracket for supporting the air supply duct and the air collecting duct.

4. The device for simulating the air-cooling environment of an electric traction converter module according to claim 3, characterized in that: Anchor bolt holes are provided on the bottom of the first bracket, and casters are provided on the second bracket.

5. The device for simulating the air-cooling environment of an electric traction converter module according to claim 1, characterized in that: The power semiconductor device is an IGBT module.

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