Lightweight high-power converter module calorimetry device

Abstract

The present invention discloses a portable high-power converter module calorimetric device, which relates to the technical field of portable high-power converter module energy loss measurement. The device includes a test shell, a walking unit for facilitating its movement is provided at the lower end of the test shell, a detection inner cavity is provided inside the test shell, an air distribution mechanism is provided in the detection inner cavity, and the air distribution mechanism includes a first horizontal air distribution channel connected to the bottom of the test shell. The present invention adopts an AHU anti-thermal bridge sealing profile plus a polyurethane insulation panel, and a fully enclosed sealing design. The air duct is built-in, with only the inlet and outlet located outside the box. Electric heating is built into the air duct to eliminate heat radiation and uneven heat dissipation. The air flow organization adopts a bottom air supply and top air return type. A guide rail support frame is used as an air supply duct, and multi-holes are used for evenly distributed air supply. The large-area return air duct at the top of the device has multi-holes for evenly distributed return air, achieving a similar one-way flow effect. The entire box is designed with negative pressure, and there will be no problem of air leakage.

Description

Technical Field

[0001] The invention relates to the technical field of energy loss measurement of a portable high-power commutation module, in particular to a calorimetric device for a portable high-power commutation module. Background Art

[0002] Fully controlled flexible direct current transmission technology based on voltage source high-voltage converters and pulse-width modulation (VSC-HVDC) has been widely adopted both domestically and internationally. However, the current converters used in flexible direct current transmission systems all utilize IGBTs as the switching devices. These voltage source high-voltage converters can switch on and off over a thousand times per cycle, resulting in losses in the converter station that account for 1.5%-6% of the rated capacity. This presents a major technical barrier to the development of large-capacity power transmission grids.

[0003] At present, the construction of power grids is in a stage of high-quality development. The accurate measurement of power loss can provide an effective basis for technical improvement to improve the voltage level and power capacity of transmission lines. Equipment manufacturers are also in urgent need of a testing method and means to measure the heat loss indicators of the commutation equipment they produce, and study the impact of device thermal characteristics on thermal management, reliability assessment, and life prediction.

[0004] Currently established chip junction temperature measurement technologies include optical testing, actual junction temperature measurement, and electrothermal coupling. However, these methods each suffer from drawbacks such as destructive inputs, operational loads, long response times, low efficiency, and poor accuracy. Therefore, a high-performance, precise, and easy-to-use calorimetric device is urgently needed to accurately calculate, analyze, and measure losses, guiding efficiency optimization, device selection, and heat sink design. Summary of the Invention

[0005] The object of the present invention is to provide a portable high-power converter module calorimetric device to solve the problems in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A portable high-power converter module calorimetric device includes a test housing, a walking unit for facilitating its movement is provided at the lower end of the test housing, a detection inner cavity is provided inside the test housing, an air distribution mechanism is provided in the detection inner cavity, the air distribution mechanism includes a first horizontal air distribution channel connected to the bottom of the test housing, a plurality of air jet holes for air jets are distributed on the upper end surface of the first horizontal air distribution channel, an air inlet at the right end of the first horizontal air distribution channel is connected to the vertical air guide channel, a preheater for preheating air is provided at the upper port position of the vertical air guide channel, and a first detection module for detecting air temperature and humidity is provided in the vertical air guide channel;

[0008] The air distribution mechanism also includes a second horizontal air distribution channel fixedly connected to the top of the test housing, a plurality of air inlet holes are distributed on the lower surface of the second horizontal air distribution channel, the second horizontal air distribution channel and the first horizontal air distribution channel are both flat structures, the right end of the second horizontal air distribution channel is connected to the exhaust channel, a fan for exhausting air is provided at the end of the exhaust channel, and a second detection module for detecting exhaust is provided on the outside of the exhaust channel;

[0009] A cold water unit for cooling the airflow is also provided inside the test housing;

[0010] A DC power supply for providing DC power is provided at the upper end of the test housing. The air distribution mechanism, the first detection module, and the second detection module are electrically connected to an electric control box provided outside the test housing. The electric control box is electrically connected to wiring terminals provided on the test housing for connecting to electricity. The electric control box is provided with a touch screen display.

[0011] The detection cavity is also provided with a guide rail unit for placing the power module. The guide rail unit is arranged above the first horizontal air distribution channel. A take-and-place opening is provided on the other side of the test shell opposite to the electrical control box, and a movable door is movably provided at the take-and-place opening.

[0012] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0013] In an optional solution: a compensation heating unit for heating the air is further provided in the vertical air guide channel, and the compensation heating unit is a heating wire for performing temperature compensation on the intake air.

[0014] In the optional solution: the test shell adopts 2mm thick 50-34 profile, the middle layer is 30mm thick polyurethane rigid foam, the bottom plate inner plate is SUS304; the bottom is 3mm thick SUS304 material.

[0015] In an optional solution: the movable door is provided with a handle and an observation window.

[0016] In an optional solution: the guide rail unit includes a guide frame mounted above the first horizontal air distribution channel, a limiting slide groove is provided on the side of the guide frame, a sliding frame is provided on the sliding sleeve of the guide frame, a limiting slider that cooperates with the limiting slide groove is provided at the lower end of the sliding frame, a ball bearing that presses against the sliding frame is provided at the upper end of the guide frame, and an anti-slip pad is provided on the upper end surface of the sliding frame to prevent the power module from slipping.

[0017] In an optional solution: the cold water unit includes a hot water exchange pipe arranged inside the test shell, the water inlet end of the hot water exchange pipe is connected to the water inlet pump, the water inlet pump is connected to the water supply tank, a thermometer is provided at the water inlet position of the hot water exchange pipe, the water outlet end of the hot water exchange pipe is connected to the water supply tank, and a thermometer is also provided at the water outlet position of the hot water exchange pipe.

[0018] In an optional solution: the first detection module and the second detection module include a humidity detector and a temperature detector.

[0019] In an optional solution: the walking unit includes a plurality of walking wheels arranged at the lower end of the test housing, and each walking wheel is a self-locking universal wheel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention utilizes AHU thermal bridge-proof sealing profiles and polyurethane insulation panels for a fully enclosed, sealed design. The air duct is internal, with only the inlet and outlet located outside the unit. The electric heater is integrated into the duct to eliminate heat radiation and uneven heat dissipation. Airflow is organized with downward supply and top return. The guide rail support frame serves as the air supply duct, providing multi-holes for evenly distributed airflow. The large-area return duct at the top of the unit features multi-holes for evenly distributed return airflow, achieving a similar unidirectional flow effect. The entire unit features a negative pressure design, eliminating air leakage, and providing enhanced sealing and strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the principle of wind direction of the present invention.

[0024] Notes on the accompanying drawings: test housing 11, power module 12, walking wheel 13, first detection module 14, vertical air guide channel 15, preheater 16, DC power supply 17, exhaust channel 18, second detection module 19, fan 20, terminal block 21, movable door 22, first horizontal air distribution channel 23, guide rail unit 24, second horizontal air distribution channel 25. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In one embodiment, Figure 1-Figure 2As shown, a lightweight high-power converter module calorimetric device includes a test shell 11, a walking unit for facilitating its movement is provided at the lower end of the test shell 11, a detection inner cavity is provided inside the test shell 11, and an air distribution mechanism is provided in the detection inner cavity, the air distribution mechanism includes a first horizontal air distribution channel 23 connected to the bottom of the test shell 11, a plurality of air jet holes for air jet are distributed on the upper end surface of the first horizontal air distribution channel 23, an air inlet at the right end of the first horizontal air distribution channel 23 is connected to the vertical air guide channel 15, a preheater 16 for preheating the air is provided at the upper end position of the vertical air guide channel 15, and the air entering from the outside is preheated by the preheater 16, and a compensation heating unit for heating the air is further provided in the vertical air guide channel 15, and the compensation heating unit is a heating wire for temperature compensation of the intake air, and a first detection module 14 for detecting the temperature and humidity of the air is provided in the vertical air guide channel 15, and the first detection module 14 includes a humidity detector and a temperature detector, so that the temperature and humidity of the intake air can be controlled;

[0027] The air distribution mechanism also includes a second horizontal air distribution channel 25 fixedly connected to the top of the test housing 11. A plurality of air inlet holes are distributed on the lower surface of the second horizontal air distribution channel 25. The second horizontal air distribution channel 25 and the first horizontal air distribution channel 23 are both flat structures. The right end of the second horizontal air distribution channel 25 is connected to the exhaust channel 18. A fan 20 for exhausting air is provided at the end of the exhaust channel 18. A second detection module 19 for detecting exhaust gas is provided on the outside of the exhaust channel 18.

[0028] The test housing 11 is further provided with a cold water unit for cooling the airflow;

[0029] The exhaust end of the fan 20 is provided with a protective grid. A DC power supply 17 for providing DC power is provided at the upper end of the test housing 11. The air distribution mechanism, the first detection module 14, and the second detection module 19 are electrically connected to an electrical control box provided outside the test housing 11. The electrical control box is electrically connected to a terminal block 21 provided on the test housing 11 for connecting to electricity. The electrical control box is provided with a touch screen display.

[0030] The detection cavity is further provided with a guide rail unit 24 for placing the power module 12. The guide rail unit 24 is arranged above the first horizontal air distribution channel 23. The setting of the guide rail unit 24 facilitates the disassembly and assembly of the power module 12. A take-and-place opening is provided on the other side of the test housing 11 opposite to the electrical control box. A movable door 22 is movably provided at the take-and-place opening. The movable door 22 is provided with a handle and an observation window. During testing, the power module 12 to be tested is placed on the guide rail unit 24 by opening the movable door 22 and sliding it into the interior of the test housing 11.

[0031] The guide rail unit 24 includes a guide frame mounted above the first horizontal air distribution channel 23, with a limited sliding groove provided on the side of the guide frame. A sliding frame is provided on the sliding sleeve of the guide frame, and a limiting slider that cooperates with the limiting sliding groove is provided at the lower end of the sliding frame. A ball bearing that presses against the sliding frame is provided at the upper end of the guide frame, so that the sliding frame can be extended out of the access opening of the test housing 11, which is convenient for installing the power module 12. The upper end surface of the sliding frame is provided with an anti-slip pad to prevent the power module 12 from slipping;

[0032] The test shell 11 is made of 2mm thick 50-34 profile, with a middle layer of 30mm thick polyurethane rigid foam, i.e., a molded cold storage panel, and the bottom plate inner plate is SUS304; the bottom plate support plate (air duct) is 3mm thick SUS304 material and can be welded and reinforced to ensure the overall structural strength;

[0033] The cold water unit includes a hot water exchange pipe arranged inside the test housing 11, the water inlet end of the hot water exchange pipe is connected to the water inlet pump, the water inlet pump is connected to the water supply tank, a thermometer is provided at the water inlet of the hot water exchange pipe, the water outlet end of the hot water exchange pipe is connected to the water supply tank, and a thermometer is also provided at the water outlet of the hot water exchange pipe, so as to facilitate the detection of water inlet and outlet problems and utilize water circulation to cool the interior of the test housing 11;

[0034] This application is rigorously sealed, using a full negative pressure airflow organization. The movable doors and box panels have a self-sealing effect under the action of atmospheric pressure and slight positive pressure. The AHU hollow profile anti-thermal bridge structure, and the joints between the structural parts and the frame are treated with rubber insulation to block the heat conduction channel and reduce heat leakage from the structural parts;

[0035] The second detection module 19 includes a humidity detector and a temperature detector, so that the temperature and humidity of the exhaust gas can be controlled;

[0036] The walking unit includes a plurality of walking wheels 13 provided at the lower end of the test housing 11. Each walking wheel 13 is a self-locking universal wheel, which facilitates the rapid transfer of the entire device and improves the portability of the device.

[0037] The above embodiment discloses a portable high-power converter module calorimetric device, wherein the measurement principle is as follows:

[0038] 1) Under stable ambient temperature, the inlet air temperature is maintained at the appropriate temperature T1 through the preheater;

[0039] 2) Place the power module into the test housing 11 and start working, maintaining the operating power constant. Adjust the fan speed according to the outlet air temperature to keep the inlet and outlet air temperature difference within the appropriate range;

[0040] 3) When the system reaches thermal stability, turn off the fan speed control to keep the speed constant;

[0041] 4) When the temperature inside the insulation box and the inlet / outlet air temperature no longer change, record the test data, including the temperature at each measuring point, the operating power of the power module, the fan speed, the air humidity, the inlet and outlet water temperature and flow rate of the water cooling unit, etc.

[0042] 5) The power module stops working and the heater is started after the power module dissipates heat;

[0043] 6) Adjust the output power of the DC power supply to make the heater generate heat until the inlet and outlet air temperature difference is consistent with that in step 4;

[0044] 8) Record the test data. At this time, the power of the heater is equal to the power loss of the power module through the air, plus the power loss dissipated by the water cooling system obtained in step 4, which is the overall power loss of the power module.

[0045] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A portable high-power commutation module calorimetric device, comprising a test housing (11), wherein a walking unit is provided at the lower end of the test housing (11) for facilitating its movement, wherein a detection cavity is provided inside the test housing (11), wherein an air distribution mechanism is provided in the detection cavity, and wherein: The air distribution mechanism includes a first horizontal air distribution channel (23) connected to the bottom of the test housing (11), a plurality of air jet holes for air jetting are distributed on the upper end surface of the first horizontal air distribution channel (23), an air inlet at the right end of the first horizontal air distribution channel (23) is connected to the vertical air guide channel (15), a preheater (16) for preheating air is provided at the upper end position of the vertical air guide channel (15), and a first detection module (14) for detecting air temperature and humidity is provided in the vertical air guide channel (15); The air distribution mechanism further includes a second horizontal air distribution channel (25) connected and fixed to the top of the test housing (11), a plurality of air inlet holes are distributed on the lower surface of the second horizontal air distribution channel (25), the second horizontal air distribution channel (25) and the first horizontal air distribution channel (23) are both flat structures, the right end of the second horizontal air distribution channel (25) is connected to the exhaust channel (18), a fan (20) for exhausting air is provided at the end of the exhaust channel (18), and a second detection module (19) for detecting exhaust is provided on the outside of the exhaust channel (18); A cold water unit for cooling the airflow is also provided inside the test housing (11); A DC power supply (17) for providing DC power is provided at the upper end of the test housing (11), and the air distribution mechanism, the first detection module (14), and the second detection module (19) are electrically connected to an electric control box provided outside the test housing (11); The detection inner cavity is also provided with a guide rail unit (24) for placing the power module (12), the guide rail unit (24) is arranged above the first horizontal air distribution channel (23), and a take-in and put-out opening is provided on the other side of the test housing (11) opposite to the electric control box, and a movable door (22) is movably provided at the take-in and put-out opening; The test shell (11) is made of 2mm thick 50-34 profile, the middle layer is 30mm thick polyurethane rigid foam, the bottom plate inner plate is SUS304; the bottom is 3mm thick SUS304 material; The guide rail unit (24) includes a guide frame mounted above the first horizontal air distribution channel (23), a limiting slide groove is provided on the side of the guide frame, a sliding frame is provided on the sliding sleeve of the guide frame, a limiting slider matched with the limiting slide groove is provided at the lower end of the sliding frame, a ball bearing that is pressed against the sliding frame is provided at the upper end of the guide frame, and an anti-skid pad is provided on the upper end surface of the sliding frame to prevent the power module (12) from slipping.

2. The portable high-power converter module calorimetric device according to claim 1, characterized in that: The vertical air guide channel (15) is also provided with a compensation heating unit for heating the air, and the compensation heating unit is a heating wire.

3. The portable high-power converter module calorimetric device according to claim 1, characterized in that: The movable door (22) is provided with a handle and an observation window.

4. The portable high-power converter module calorimetric device according to claim 1, characterized in that: The cold water unit includes a heat exchange water pipe arranged inside the test housing (11), the water inlet end of the heat exchange water pipe is connected to the water inlet pump, the water inlet pump is connected to the water supply tank, a thermometer is provided at the water inlet position of the heat exchange water pipe, the water outlet end of the heat exchange water pipe is connected to the water supply tank, and a thermometer is also provided at the water outlet position of the heat exchange water pipe.

5. The portable high-power converter module calorimetric device according to claim 1, characterized in that: The first detection module (14) and the second detection module (19) include a humidity detector and a temperature detector.

6. The portable high-power converter module calorimetric device according to claim 1, characterized in that: The walking unit comprises a plurality of walking wheels (13) arranged at the lower end of the test housing (11), and each walking wheel (13) is a self-locking universal wheel.

7. The portable high-power converter module calorimetric device according to claim 1, characterized in that: The electric control box is electrically connected to a wiring terminal (21) provided on the test housing (11) for connecting electricity, and a touch display screen is provided on the electric control box.

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