A test mechanism for power converters

Abstract

This invention discloses a testing mechanism for power converters, belonging to the field of power converter testing technology. The testing mechanism includes a test cabinet for testing the electrical performance of the power converter. A multi-loop integrated connection station is installed on the test cabinet. A base is fixed to the upper surface of the connection station to define the test position of the power converter. Two sets of external heat insulation frames are fixed on the base to limit the environmental heat dissipation conditions during power converter testing. Each of the four sides of the external heat insulation frame has heat dissipation grooves to assist in heat dissipation. An internal insulation mechanism is fitted into the inner wall of the external heat insulation frame. A transmission mechanism is provided on the base to drive the internal insulation mechanism to move up and down. This testing mechanism can dynamically simulate the environmental heat dissipation conditions during power converter testing, testing the electrical performance of the power converter under various conditions such as poor heat dissipation and good heat dissipation, thus improving the reference value of the test data.

Description

Technical Field

[0001] This invention relates to the field of power converter testing technology, specifically to a testing mechanism for power converters. Background Technology

[0002] Electrical performance testing equipment is used to test the electrical performance and reliability of various AC / DC power converters. It can automatically test the input and output electrical parameters, conversion efficiency, voltage regulation accuracy, ripple noise, dynamic response and various protection functions of power converters under simulated actual working conditions. It is widely used in product development, factory inspection and quality control, and can quickly and accurately determine whether power converters meet design standards and usage requirements.

[0003] For example, patent CN107632274A discloses a power converter testing device, including a transformer unit, an adapter unit, a power resistor unit, and a short-circuit terminal. The transformer unit is used to connect to 220V AC power and output low-voltage AC power below 36V. The adapter unit includes a plug, a first output socket, and a second output socket. The power resistor unit serves as the load for the test circuit. The short-circuit terminal is used to short-circuit the neutral and live wires of the power converter socket. The power converter plug is connected to the first output socket. A power converter testing method involves stepping down 220V AC power to form a low-voltage AC test circuit, and then short-circuiting the neutral and live wires of the power converter socket before connecting it to the circuit.

[0004] For example, patent CN120161255A discloses a synchronous... An automatic testing device and method for a digital converter includes a verification motherboard, a verification daughterboard, a programmable DC power supply, a digital multimeter, an angle simulator, a signal generator, and a host computer. The host computer is equipped with the automatic testing software for the synchronous-digital converter. It provides the necessary power input, reference input voltage, and angle synchronization input signal to the synchronous-digital converter, achieving dual-channel synchronization. Normal operation of the digital converter: The angle signal and reference voltage are input synchronously through the angle simulator, and the converter outputs the corresponding binary angle digital signal. The controller collects the corresponding angle digital signal, converts it into an angle, and transmits it to the host computer through the serial port. The high and low levels of the output of the synchronous-to-digital converter are measured by a digital multimeter and then transmitted to the host computer. Finally, the host computer judges whether it meets the standards. The test indicators include shaft angle conversion, resolution, output high level, and output low level.

[0005] In practical applications, power converters are often constrained by factors such as installation space, airtightness, and surrounding environment, making it difficult to achieve ideal heat dissipation conditions. This can easily lead to problems such as poor heat dissipation and excessive temperature rise. Existing electrical performance testing equipment is mostly used in open, well-ventilated ideal environments, which cannot simulate the heat dissipation-limited scenarios in actual working conditions. This results in deviations between the electrical performance parameters obtained from the tests and the actual usage conditions of the product, and cannot comprehensively reflect the working stability and reliability of the power converter under complex thermal environments.

[0006] To address the aforementioned issues, there is an urgent need for innovative design based on the existing power converter testing mechanism. Summary of the Invention

[0007] The purpose of this invention is to provide a testing mechanism for power converters, in order to solve the problem that existing electrical performance testing equipment mentioned in the background art is mostly conducted in an open, well-ventilated ideal environment, which makes it difficult to simulate the scenario of limited heat dissipation in actual working conditions. This results in deviations between the electrical performance parameters obtained from the test and the actual use of the product, and cannot comprehensively reflect the working stability and reliability of the power converter in complex thermal environments.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a testing mechanism for a power converter, comprising an electrical performance testing cabinet for testing the power converter, a multi-circuit integrated connection station installed on the electrical performance testing cabinet, a base fixed on the upper surface of the connection station to limit the testing position of the power converter, two sets of external heat insulation frames fixed on the base to limit the environmental heat dissipation conditions during power converter testing, heat dissipation grooves for auxiliary heat dissipation on all four sides of the external heat insulation frames, and an internal insulation mechanism fitted into the inner wall of the external heat insulation frames, and a transmission mechanism on the base to drive the internal insulation mechanism to move up and down, dynamically adjusting the environmental heat dissipation conditions during power converter testing; a lifting column fixed on the base, a bracket fixed at the lifting end of the lifting column, the bracket supporting and limiting the bottom of the power converter, and a lifting mechanism on the base to drive the bracket to move upward, so as to drive the power converter under test to move away from the external heat insulation frame, and when the internal insulation mechanism moves down more than halfway, it can trigger the lifting mechanism to drive the bracket to move upward.

[0009] Preferably, the electrical performance testing cabinet is equipped with a sampling measurement unit, a control display unit, and a power supply load unit; the connection station is equipped with an input connector, a sampling connector, and a load connector.

[0010] Preferably, the transmission mechanism includes a lifting frame outside the outer heat insulation frame of the sliding sleeve, the lifting frame passing through the heat dissipation groove and fixedly connected to the inner heat insulation mechanism; an upper rotating cylinder is rotatably connected to the outside of the lifting frame, a lower rotating cylinder is rotatably connected to the base, an electric telescopic rod is fixed on the lower rotating cylinder, and the output end of the electric telescopic rod is fixedly connected to the upper rotating cylinder.

[0011] Preferably, a guide seat is fixed to the outside of the outer heat insulation frame, a guide column is slidably connected in the guide seat, the guide column is fixedly connected to the lifting frame, and a positioning spring is elastically connected between the lifting frame and the guide column.

[0012] Preferably, the internal insulation mechanism includes an insulation frame that slides and adheres to the inner wall of the outer insulation frame, with slots at all four corners of the insulation frame; an embedded groove is provided on each of the four side walls of the insulation frame, and a hollow rectangular column is fixed in the embedded groove, the hollow rectangular column being fixedly connected to the inner wall of the lifting frame; an aerogel insulation layer and an outer insulation layer are slidably installed on the outside of the hollow rectangular column, both the aerogel insulation layer and the outer insulation layer being embedded in the embedded groove, and the aerogel insulation layer being adhered between the outer insulation layer and the insulation frame.

[0013] Preferably, the base is provided with a pressure mechanism that uses the downward movement force of the lifting frame to drive the outer insulation layer to compress the aerogel insulation layer, thereby adjusting the thermal insulation performance of the inner insulation mechanism.

[0014] Preferably, the hollow rectangular column is provided with a slide rail, and a slide seat is slidably connected in the slide rail, and the slide seat is fixedly connected to the outer insulation layer; a guide bracket is fixedly installed on the base, and a straight slide groove and an inclined slide groove are provided in the guide bracket, and the slide seat is slidably connected in the straight slide groove and the inclined slide groove; an inner slide groove is provided on the inner side wall of the guide bracket, and the opening direction of the inner slide groove is the same as the opening direction of the straight slide groove and the inclined slide groove, and a slide column is slidably connected in the inner slide groove, and the slide column is fixedly connected to the slide seat.

[0015] Preferably, the insulation frame has multiple circular grooves on the side near the power converter, and sealing blocks are fitted into the circular grooves; the sealing block includes a small disc that is fixed through the aerogel insulation layer, a large disc that is fixed on the small disc, and the large disc is sealed in the circular groove.

[0016] Preferably, the lifting mechanism includes a support frame fixed on the base, a steering slide frame rotatably connected to the support frame, a cylindrical rod slidably connected to the steering slide frame, and the cylindrical rod fixedly connected to the lifting end of the lifting column.

[0017] Preferably, a pressure block is fixed on the side of the steering slide frame away from the cylindrical rod, and a pressure column is correspondingly provided directly above the pressure block, with the pressure column fixedly connected to the guide column.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the test mechanism for power converters defines the electrical performance test position of the power converter at the connection station, and can dynamically adjust the heat dissipation conditions during the power converter test process, simulating the heat dissipation limitation state during actual use, thereby improving the authenticity and reference value of the electrical performance test data.

[0019] An internal insulation mechanism is fitted into the inner wall of the outer heat insulation frame. A transmission mechanism is installed on the base to drive the lifting and lowering movement of the internal insulation mechanism. This dynamically adjusts the environmental heat dissipation conditions during power converter testing. The electric telescopic rod controls the lifting and lowering movement of the frame, which in turn drives the internal insulation mechanism to move up and down synchronously. This adjusts the position of the internal insulation mechanism inside the outer heat insulation frame, thereby adjusting the open area of ​​the heat dissipation slots on the outer heat insulation frame to adjust the environmental heat dissipation conditions for power converter electrical performance testing.

[0020] During the downward movement of the internal insulation mechanism, the open area of ​​the heat dissipation groove increases, and the slide moves directionally along the straight and inclined slides in the guide bracket. When the slide moves in the inclined slide, it undergoes lateral displacement, which pushes the outer insulation layer inward to compress the aerogel insulation layer. This causes the aerogel insulation layer to undergo controllable elastic compression deformation, and the internal porosity decreases significantly with increasing pressure. The overall thickness decreases, the thermal resistance decreases accordingly, and the heat insulation capacity weakens. The heat generated by the enclosed power converter can be more smoothly conducted outward through the compressed aerogel layer, thereby effectively reducing the heat collection effect and improving the overall heat dissipation efficiency under the test environment.

[0021] During the compression of the aerogel insulation layer, the sealing block moves synchronously, causing the large disc in the sealing block to move and separate from the groove. At this time, some of the gas inside the insulation frame passes through the groove and directly enters the aerogel insulation layer, further improving the gas dissipation effect. This simulates the situation where the power converter is partially blocked but has certain heat dissipation conditions during actual use.

[0022] The base is equipped with a lifting mechanism that drives the bracket to move upward, so as to move the power converter under test away from the outer heat insulation frame. When the inner heat insulation mechanism moves down more than halfway, it can trigger the lifting mechanism to drive the bracket to move upward. At this time, the bracket drives the power converter to move upward away from the heat insulation range of the outer heat insulation frame. At this time, the unit converter is partially in a completely open state, simulating the actual use of the power converter with no partial obstruction and good heat dissipation conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the electrical performance testing cabinet structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the connection station structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the base structure of the present invention.

[0026] Figure 4 This is a schematic diagram of the outer heat insulation frame and the inner heat insulation mechanism of the present invention.

[0027] Figure 5 This is a schematic diagram of the lifting frame structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the thermal insulation frame structure of the present invention.

[0029] Figure 7 This is a schematic diagram of the aerogel insulation layer structure of the present invention.

[0030] Figure 8 This is a schematic diagram of the slide structure of the present invention.

[0031] Figure 9 This is a schematic diagram of the small and large disk structures of the present invention.

[0032] Figure 10 This is a schematic diagram of the guide bracket structure of the present invention.

[0033] Figure 11 This is a schematic diagram of the linear slide and inclined slide structures of the present invention.

[0034] Figure 12 This is a schematic diagram of the electric telescopic pole structure of the present invention.

[0035] Figure 13 This is a schematic diagram of the guide column structure of the present invention.

[0036] Figure 14 This is a schematic diagram of the steering slide frame structure of the present invention.

[0037] In the diagram: 1. Electrical performance testing cabinet; 101. Sampling and measurement unit; 102. Control and display unit; 103. Power supply and load unit; 2. Connection station; 201. Input connector; 202. Sampling connector; 203. Load connector; 3. Base; 4. Outer insulation frame; 5. Inner insulation mechanism; 51. Insulation frame; 52. Embedded groove; 53. Hollow rectangular column; 531. Slide rail; 54. Aerogel insulation layer; 55. Outer insulation layer; 551. Slide seat; 56. Circular groove; 57. Dense 571. Sealing block; 572. Small disc; 573. Large disc; 6. Groove; 7. Heat dissipation groove; 8. Lifting frame; 81. Guide seat; 82. Guide column; 83. Positioning spring; 84. Upper rotating cylinder; 85. Electric telescopic rod; 86. Lower rotating cylinder; 9. Guide bracket; 91. Straight slide; 92. Inclined slide; 93. Inner slide; 94. Sliding column; 10. Lifting column; 11. Bracket; 12. Support frame; 13. Steering slide; 14. Cylindrical rod; 15. Pressure block; 16. Pressure column. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figures 1-5 and Figure 12 The present invention provides the following technical solution: a testing mechanism for a power converter, comprising an electrical performance testing cabinet 1 for testing the power converter, a multi-circuit integrated connection station 2 installed on the electrical performance testing cabinet 1, a base 3 fixed on the upper surface of the connection station 2 to define the testing position of the power converter, two sets of external heat insulation frames 4 fixed on the base 3 to limit the heat dissipation conditions of the environment during the power converter test, heat dissipation grooves 7 for auxiliary heat dissipation on all four sides of the external heat insulation frames 4, and an internal heat insulation unit fitted into the inner wall of the external heat insulation frames 4. The structure includes a base 3 with a transmission mechanism that drives the internal insulation mechanism 5 to move up and down, dynamically regulating the environmental heat dissipation conditions during power converter testing. A lifting column 10 is fixed to the base 3, and a bracket 11 is fixed to the lifting end of the lifting column 10. The bracket 11 supports and confines the power converter to the bottom, and the base 3 is equipped with a lifting mechanism that drives the bracket 11 upwards, causing the power converter under test to move away from the outer insulation frame 4. When the internal insulation mechanism 5 has moved down more than half its travel, the lifting mechanism is triggered, causing the bracket 11 to move upwards. The electrical performance testing cabinet 1 is equipped with a sampling measurement unit 101, a control display unit 102, and a power supply load unit 103. The connection station 2 is equipped with an input connector 201, a sampling connector 202, and a load connector 203.

[0040] Please see Figures 3-5 The transmission mechanism includes a lifting frame 8 outside the sliding outer heat insulation frame 4, which passes through the heat dissipation groove 7 and is fixedly connected to the inner heat insulation mechanism 5. An upper rotating cylinder 84 is rotatably connected to the outside of the lifting frame 8, and a lower rotating cylinder 86 is rotatably connected to the base 3. An electric telescopic rod 85 is fixed on the lower rotating cylinder 86, and the output end of the electric telescopic rod 85 is fixedly connected to the upper rotating cylinder 84. A guide seat 81 is fixedly fixed to the outside of the outer heat insulation frame 4, and a guide column 82 is slidably connected in the guide seat 81. The guide column 82 is fixedly connected to the lifting frame 8, and a positioning spring 83 is elastically connected between the lifting frame 8 and the guide column 82.

[0041] Please see Figures 6-9The internal insulation mechanism 5 includes an insulation frame 51 that slides and adheres to the inner wall of the outer insulation frame 4. Each of the four corners of the insulation frame 51 has a slot 6. Each of the four side walls of the insulation frame 51 has an embedded groove 52, in which a hollow rectangular column 53 is fixed. The hollow rectangular column 53 is fixedly connected to the inner wall of the lifting frame 8. An aerogel insulation layer 54 and an outer insulation layer 55 are slidably installed on the outside of the hollow rectangular column 53. Both the aerogel insulation layer 54 and the outer insulation layer 55 are embedded in the embedded groove 52, and the aerogel insulation layer 54 is fitted between the outer insulation layer 55 and the insulation frame 51. A pressure mechanism is provided on the base 3, which uses the downward movement force of the lifting frame 8 to drive the outer insulation layer 55 to compress the aerogel insulation layer 54, thereby adjusting the thermal insulation performance of the internal insulation mechanism 5.

[0042] Please see Figures 6-11 A slide rail 531 is provided on the hollow rectangular column 53, and a slide seat 551 is slidably connected in the slide rail 531. The slide seat 551 is fixedly connected to the outer insulation layer 55. A guide bracket 9 is fixedly installed on the base 3. A straight slide groove 91 and an inclined slide groove 92 that are interconnected are provided in the guide bracket 9. The slide seat 551 is slidably connected in the straight slide groove 91 and the inclined slide groove 92. An inner slide groove 93 is provided on the inner side wall of the guide bracket 9. The opening direction of the inner slide groove 93 is the same as the opening direction of the straight slide groove 91 and the inclined slide groove 92. A slide column 94 is slidably connected in the inner slide groove 93. The slide column 94 is fixedly connected to the slide seat 551. The insulation frame 51 has multiple circular grooves 56 on the side near the power converter, and a sealing block 57 is fitted into the circular groove 56. The sealing block 57 includes a small disc 571 that is fixed through the aerogel insulation layer 54, and a large disc 572 is fixed on the small disc 571. The large disc 572 is sealed in the circular groove 56.

[0043] Before conducting electrical performance testing, the power converter is first installed on the base 3 and bracket 11 through the inner insulation mechanism 5. The power converter is then connected to the input connector 201, sampling connector 202, and load connector 203 via cables. During testing, the power supply load unit 103 in the electrical performance test cabinet 1 provides stable input excitation to the power converter and simulates the set load conditions. The sampling and measurement unit 101 collects electrical performance parameters such as input and output voltage, current, ripple, and efficiency of the power converter in real time. After processing, the collected data is displayed and recorded in real time on the control display unit 102, thereby completing the automatic testing and judgment of the power converter's electrical performance throughout the entire process.

[0044] In actual use, power converters are affected by various factors such as installation space and environment. After a period of use, the internal heat rises. If the heat is not dissipated in time, it will affect its electrical performance. In this embodiment, the environmental heat dissipation conditions can be dynamically simulated to improve the reference value of the power converter's electrical performance test results. If the inner insulation mechanism 5 completely covers the heat dissipation groove 7 of the outer insulation frame 4, the inner insulation mechanism 5 and the outer insulation frame 4 are completely wrapped around the outside of the power converter, and its heat dissipation effect is poor. This can simulate the state of the power converter being used in a relatively closed environment. When the output end of the electric telescopic rod 85 retracts inward, the upper rotating cylinder 84 and the lower rotating cylinder 86 at both ends of the electric telescopic rod 85 rotate accordingly. The upper rotating cylinder 84 is connected to the lifting frame 8 and rotates, driving the lifting frame 8 to move downward. The lifting frame 8 controls the inner insulation mechanism 5 to move downward synchronously. At this time, the heat dissipation groove 7 on the outer heat insulation frame 4 is partially open. The greater the downward movement of the inner insulation mechanism 5, the larger the open area of ​​the heat dissipation groove 7. At this time, the heat dissipation conditions around the power converter are better, which can simulate the state of limited heat dissipation and ventilation conditions of the power converter in actual use.

[0045] As the lifting frame 8 moves downward, it drives the hollow rectangular column 53 and the slide block 551 to move downward synchronously. The slide block 551 gradually moves from the straight slide groove 91 of the guide bracket 9 to the inclined slide groove 92 below. The slide columns 94 on both sides of the slide block 551 slide along it in the inner slide groove 93. When the slide block 551 moves in the inclined slide groove 92, it undergoes a lateral displacement. At this time, the slide block 551 slides along the slide rail 531 in the hollow rectangular column 53, and it drives the outer insulation layer 55 to move synchronously. The outer insulation layer 55 compresses the aerogel insulation layer 54 inward, causing the aerogel insulation layer 54 to undergo controllable elastic compression deformation. Its thickness decreases, the thermal resistance decreases accordingly, and the internal porosity decreases significantly with the increase of pressure. The heat insulation capacity is weakened, and the heat generated by the power converter wrapped in the inner insulation mechanism 5 can be more smoothly conducted and dissipated to the outside through the compressed aerogel insulation layer 54, dynamically adjusting the heat dissipation conditions around the power converter at this time.

[0046] During the compression process, the small disc 571 fixed on the aerogel insulation layer 54 moves synchronously with it. The large disc 572 at the end of the small disc 571 moves away from the groove 56, so that the groove 56 is in an open state. The heat generated by the power converter during the test can directly pass through the groove 56 into the aerogel insulation layer 54, and the heat dissipation effect of its surrounding environment is stronger, which is in line with the simulation environment with good heat dissipation effect.

[0047] Example 2: Please refer to Figures 12-14Based on Embodiment 1, a lifting mechanism is also disclosed, the specific structure of which is as follows: The lifting mechanism includes a support frame 12 fixed on the base 3, a steering slide frame 13 rotatably connected to the support frame 12, a cylindrical rod 14 slidably connected in the steering slide frame 13, and the cylindrical rod 14 fixedly connected to the lifting end of the lifting column 10. A pressure block 15 is fixed on the side of the steering slide frame 13 away from the cylindrical rod 14, and a pressure column 16 is correspondingly arranged directly above the pressure block 15, and the pressure column 16 is fixedly connected to the guide column 82.

[0048] As the lifting frame 8 moves downward, it drives the guide column 82, which passes through the guide seat 81, to move downward. The guide column 82 drives the bottom pressure column 16 to move downward synchronously. After moving down a certain distance, the pressure column 16 contacts the surface of the pressure block 15. Under pressure, the pressure block 15 rotates downward, which drives the support frame 12 to rotate upward (the rotation angle of the support frame 12 is limited to 0-90°. Under the natural state, it is subject to the gravity of the bracket 11, and the pressure block 15 fixed on its surface is in a horizontal state). At this time, the cylindrical rod 14 passes through the support frame 12 and is fixed. The cylinder rod 14 and the lifting column 10 are slid upwards to control the upward movement of their lifting ends. The lifting end of the lifting column 10 pushes the bracket 11 upwards in sync, lifting the power converter on the bracket 11 upwards. This causes the upper part of the power converter to move away from the outer heat insulation frame 4. At this time, the upper part of the power converter is basically in an open test environment, which can simulate the actual use of the power converter in an open and well-ventilated environment. After the test, the upper part of the power converter is separated from the outer heat insulation frame 4, which also makes it easy to remove it and complete the overall test.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A testing mechanism for a power converter, comprising an electrical performance testing cabinet (1) for testing the power converter, wherein a multi-circuit integrated connection station (2) is installed on the electrical performance testing cabinet (1), characterized in that: The upper surface of the connection station (2) is fixed with a base (3) that limits the test position of the power converter. Two sets of external heat insulation frames (4) that limit the environmental heat dissipation conditions during the test of the power converter are fixed on the base (3). Heat dissipation grooves (7) for auxiliary test heat dissipation are opened on all four sides of the external heat insulation frame (4). An internal heat insulation mechanism (5) is attached to the inner wall of the external heat insulation frame (4). A transmission mechanism for driving the internal heat insulation mechanism (5) to move up and down is provided on the base (3) to dynamically adjust the environmental heat dissipation conditions during the test of the power converter. A lifting column (10) is fixed on the base (3). A bracket (11) is fixed on the lifting end of the lifting column (10). The bracket (11) is supported and limited at the bottom of the power converter. A lifting mechanism is provided on the base (3) to drive the bracket (11) to move upward, so as to drive the power converter under test to move away from the outer heat insulation frame (4). When the inner heat insulation mechanism (5) moves down more than halfway, it can trigger the lifting mechanism to drive the bracket (11) to move upward.

2. The testing mechanism for a power converter according to claim 1, characterized in that: The electrical performance test cabinet (1) is equipped with a sampling measurement unit (101), a control display unit (102), and a power supply load unit (103). The connection station (2) is equipped with an input connector (201), a sampling connector (202) and a load connector (203).

3. The testing mechanism for a power converter according to claim 1, characterized in that: The transmission mechanism includes a lifting frame (8) outside the outer heat insulation frame (4) of the sliding sleeve, and the lifting frame (8) passes through the heat dissipation groove (7) and is fixedly connected to the inner heat insulation mechanism (5); The lifting frame (8) is externally rotatably connected to an upper rotating cylinder (84), and the base (3) is rotatably connected to a lower rotating cylinder (86). An electric telescopic rod (85) is fixed on the lower rotating cylinder (86), and the output end of the electric telescopic rod (85) is fixedly connected to the upper rotating cylinder (84).

4. The testing mechanism for a power converter according to claim 3, characterized in that: The outer heat insulation frame (4) is fixed with a guide seat (81), and a guide column (82) is slidably connected in the guide seat (81). The guide column (82) is fixedly connected to the lifting frame (8), and a positioning spring (83) is elastically connected between the lifting frame (8) and the guide column (82).

5. A testing mechanism for a power converter according to claim 3, characterized in that: The inner insulation mechanism (5) includes an insulation frame (51) that slides and adheres to the inner wall of the outer insulation frame (4), and the insulation frame (51) has grooves (6) at all four corners. The four sides of the insulation frame (51) are provided with embedded grooves (52), and hollow rectangular columns (53) are fixed in the embedded grooves (52). The hollow rectangular columns (53) are fixedly connected to the inner wall of the lifting frame (8). The hollow rectangular column (53) is slidably fitted with an aerogel insulation layer (54) and an outer insulation layer (55). Both the aerogel insulation layer (54) and the outer insulation layer (55) are embedded in the inner groove (52), and the aerogel insulation layer (54) is attached between the outer insulation layer (55) and the insulation frame (51).

6. A test mechanism for a power converter according to claim 5, characterized in that: The base (3) is provided with a pressure mechanism that uses the downward movement force of the lifting frame (8) to drive the outer insulation layer (55) to compress the aerogel insulation layer (54), thereby adjusting the thermal insulation performance of the inner insulation mechanism (5).

7. A test mechanism for a power converter according to claim 6, characterized in that: The hollow rectangular column (53) is provided with a slide rail (531), and a slide block (551) is slidably connected in the slide rail (531). The slide block (551) is fixedly connected to the outer insulation layer (55). A guide bracket (9) is fixedly installed on the base (3). A straight slide groove (91) and an inclined slide groove (92) that are interconnected are provided in the guide bracket (9). The slide block (551) is slidably connected in the straight slide groove (91) and the inclined slide groove (92). An inner groove (93) is provided on the inner side wall of the guide bracket (9). The opening direction of the inner groove (93) is the same as that of the straight groove (91) and the oblique groove (92). A sliding column (94) is slidably connected in the inner groove (93). The sliding column (94) is fixedly connected to the slide block (551).

8. A test mechanism for a power converter according to claim 7, characterized in that: The insulation frame (51) has multiple circular grooves (56) on the side near the power converter, and sealing blocks (57) are fitted into the circular grooves (56). The sealing block (57) includes a small disc (571) that is fixed through the aerogel insulation layer (54), a large disc (572) that is fixed on the small disc (571), and the large disc (572) is sealed in the circular groove (56).

9. A test mechanism for a power converter according to claim 4, characterized in that: The lifting mechanism includes a support frame (12) fixed on the base (3), a steering slide frame (13) rotatably connected to the support frame (12), a cylindrical rod (14) slidably connected in the steering slide frame (13), and the cylindrical rod (14) fixedly connected to the lifting end of the lifting column (10).

10. A test mechanism for a power converter according to claim 9, characterized in that: A pressure block (15) is fixed on the side of the steering slide frame (13) away from the cylindrical rod (14), and a pressure column (16) is provided directly above the pressure block (15). The pressure column (16) is fixedly connected to the guide column (82).

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