A power loss test device for wide bandgap power devices

Abstract

The invention discloses a power loss test device for a wide bandgap power device, comprising a device body, a door body installed on the device body, and also comprising: a detection substrate for power-on test of the device; a collision mechanism for pushing the device installed on the detection substrate to collide; an environment adjustment mechanism for adjusting the environment in the device body; and a balance mechanism for causing the detection substrate to be in a horizontal balance state, the balance mechanism comprising a support rod, a piston plate, a limit frame and a limit assembly installed on the device body, the piston plate is fixedly connected to a support rod whose one end extends into a first cavity and slidably cooperates with the device body, and the first cavity is filled with liquid; the invention can evaluate the wide bandgap performance by detecting the power loss of the broadband power device after a collision, and can also detect the wide bandgap power loss under different environments.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and in particular relates to a power loss test device for a wide bandgap power device. Background Art

[0002] Wide bandgap semiconductor power devices have advantages such as high switching speed and low on-resistance, and are increasingly being used in power electronic converters.

[0003] Wide bandgap power devices generally need to undergo performance tests before leaving the factory, such as power loss tests under different environments. Generally, environmental simulation is used to test the power loss of power devices. A wide bandgap power device power loss test device is proposed, which can collide with wide bandgap power devices and compare the power loss changes before and after the collision to evaluate the performance of wide bandgap power devices. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a wide bandgap power device power loss test device to solve the above problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A wide bandgap power device power loss test device, comprising a device body, a door body is installed on the device body, and further comprising:

[0006] A detection substrate for conducting a power-on test on the device;

[0007] A collision mechanism, mounted on the device body, for pushing the device mounted on the detection substrate to collide;

[0008] An environment adjustment mechanism, installed on the device body, for adjusting the environment inside the device body; and

[0009] A balancing mechanism is installed on the device body and is used to cause the detection substrate to be in a horizontal balanced state. The balancing mechanism includes a support rod, a piston plate, a limit frame and a limit assembly installed on the device body. The limit frame is arranged in a first cavity opened on the device body and is fixedly connected to the device body. The piston plate is slidably matched with the limit frame. The piston plate is fixedly connected to the support rod whose one end extends into the first cavity and is slidably matched with the device body. The first cavity is filled with liquid.

[0010] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0011] Further technical solution: the limit assembly includes an arc-shaped pressure plate and a first linear motion member, the arc-shaped pressure plate is fixedly connected to the output end of the first linear motion member, and the first linear motion member is fixedly connected to the device body.

[0012] Further technical solution: the collision mechanism includes a limit slider, the detection substrate is detachably connected to the limit slider, the limit slider is slidably matched with the device body, and the limit slider is slidably matched with a guide rod fixedly connected to the device body, and further includes:

[0013] A displacement assembly, mounted on the device body, for pushing the limit slider to perform linear motion in a horizontal direction; and

[0014] The energy supply component is installed on the device body and is used to provide kinetic energy to the limit slider.

[0015] Further technical solution: The displacement assembly includes a first plate body, a second plate body and a second linear moving part, the first plate body is fixedly connected to the limiting slider, the first plate body is detachably connected to the second plate body through a magnetic unit, and the second plate body is fixedly connected to the output end of the second linear moving part fixedly connected to the device body.

[0016] Further technical solution: The energy supply component includes a push rod, a sleeve and a first elastic member. The push rod and the sleeve are slidably matched. One end of the push rod is fixedly connected to the limit slider, and the other end of the push rod extends into the sleeve. The elastic member is located in the sleeve, and its two ends are respectively fixedly connected to the push rod and the sleeve, and the end of the sleeve is fixedly connected to the device body.

[0017] Further technical solution: The magnetic suction unit includes an insertion rod, a second elastic member, and two groups of electromagnets. The insertion rod is slidably matched with a limiting slide groove opened on the second plate body, one end of the insertion rod is fixedly connected to the second elastic member fixedly set in the limiting slide groove, one group of the electromagnets is embedded in the groove opened in the first plate body and fixedly connected to the second plate body, and the other group of the electromagnets is embedded and fixedly connected to the other end of the insertion rod.

[0018] Further technical solution: The environmental adjustment mechanism includes a first pipe, a second pipe, a first nozzle, a second nozzle, a temperature sensor and a humidity sensor. The first pipe runs through the device body and is fixedly connected to the device body. The second pipe runs through the first pipe and is fixedly connected to the first pipe. The first nozzle is embedded between the first pipe and the second pipe and is fixedly connected to the two. The second nozzle is fixedly connected to the second pipe. A first valve body is embedded and fixedly connected in the second pipe. The temperature sensor and the humidity sensor are both fixedly connected to the device body.

[0019] Further technical solution: A third pipe is fixedly connected to the device body, one end of the third pipe extends into the device body and the other end extends out of the device body, and a second valve body is fixedly connected inside the third pipe.

[0020] Further technical solution: A circulation component for promoting internal circulation of gas inside the device body is arranged inside the device body.

[0021] Further technical solution: The circulation component includes a box, a fan assembly and air holes. The box is fixedly connected to the upper end of the device body. Two fan assemblies are symmetrically embedded and fixedly connected to the box. Air holes are symmetrically opened on both sides of the box.

[0022] Beneficial Effects

[0023] The present invention provides a wide bandgap power device power loss test device, which has the following beneficial effects compared with the prior art:

[0024] 1. In the present invention, since the first cavity is filled with liquid and the four support rods are all slidably matched with the device body, when there is a height difference between the ground contacted by the support rods, the support rod at the higher position pushes the piston plate to squeeze the liquid in the first cavity to flow toward the support rod at the lower position. At this time, the liquid pushes the other piston plate fixedly connected to the support rod to drive the support rod to perform linear movement in the vertical direction until the device body as a whole is in a horizontal state, that is, the detection substrate is in a horizontal state. At this time, the limit assembly is started to limit the four support rods, and the device is installed on the detection substrate, so that the device can be installed on the detection substrate in a horizontal state. At this time, the relevant technicians start the collision mechanism to give the device installed on the detection substrate a certain kinetic energy to cause it to collide, so as to realize the test of the power loss change of the device before and after the collision, so as to realize the technical effect of evaluating the quality of the device. At the same time, the relevant technicians can adjust the temperature and humidity in the device body through the environmental adjustment mechanism, and perform power loss tests on the device installed on the detection substrate under different temperatures and humidities, so as to realize the technical effect of evaluating its quality.

[0025] 2. The displacement component can drive the limit slider to perform horizontal linear motion, so that the limit slider can be reset. At the same time, the reset limit slider can compress the output end of the energy supply component to complete the energy empowerment of the output end of the energy supply component. When it is necessary to perform a collision test on the device installed on the detection substrate, it is only necessary to release the limit of the limit slider by the displacement component. The detection substrate installed on the limit slider will perform linear motion in the horizontal direction at a certain initial velocity under the impact of the output end of the energy supply component until the detection substrate hits the rubber pad installed on the device body. At this time, the relevant technicians can complete the technical effect of device quality detection by comparing the power loss of the device installed on the detection substrate before and after the impact (if the internal unit of the device is not tightly connected, it will shake after the impact, resulting in an increase in the power loss of the device);

[0026] 3. Relevant technicians can introduce high-pressure hot gas into the device body through the first pipeline. At this time, the two gases collide in the device body and quickly fill the inside of the device body. At the same time, the temperature sensor can monitor the temperature of the device body in real time until the temperature inside the device body reaches the preset temperature. If the humidity inside the device body is to be changed, the relevant technicians release the limit of the support rod by the limit assembly and open the first valve body. At this time, the device body performs linear motion in the vertical direction relative to the support rod under its own gravity, and the piston plate squeezes the liquid in the first cavity. The liquid is sprayed into the device body from the second nozzle in an atomized state to change the humidity inside the device body. The purpose of this setting is to change the temperature and humidity inside the device body, so that the relevant technicians can test the power loss of the device under different temperature and humidity conditions. At the same time, the liquid in the first cavity can be used as an insulation layer to insulate the space inside the device body;

[0027] 4. In the present invention, the fan assembly can be used in conjunction with the box to drive the air in the device body to flow alternately between the device body and the internal cavity of the box, thereby achieving rapid mixing of the cold air and hot air in the device body, improving the temperature increase efficiency in the device body, and at the same time being able to fully mix the mist liquid sprayed from the second pipe with the gas in the device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 3 It is a structural schematic diagram of the balancing mechanism of the present invention.

[0031] Figure 4 It is a structural schematic diagram of the collision mechanism of the present invention.

[0032] Figure 5 It is a structural schematic diagram of the environment regulating mechanism of the present invention.

[0033] Figure 6 It is a schematic diagram of the structure of the circulation component of the present invention.

[0034] Notes on figure numbers: 1. Device body; 101. First cavity; 2. Door body; 3. Balancing mechanism; 301. Support rod; 302. Piston plate; 303. Limit frame; 304. Limit assembly; 3041. Arc-shaped pressure plate; 3042. First linear motion part; 4. Environmental adjustment mechanism; 401. First pipeline; 402. Second pipeline; 403. First nozzle; 404. Second nozzle; 5. Detection substrate; 6. Collision mechanism; 601. Limit slider; 602. Displacement assembly; 6021. First plate body; 6022. Second plate body; 6023. Second linear motion part; 603. Energy supply assembly; 6031. Push rod; 6032. Sleeve; 604. Guide rod; 7. Circulation assembly; 701. Box body; 702. Fan assembly; 703. Air hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0037] See also Figures 1 to 3 , provided in one embodiment of the present invention, is a wide bandgap power device power loss test device, comprising a device body 1, a door body 2 is installed on the device body 1, and further comprising:

[0038] A detection substrate 5, used for conducting a power-on test on the device;

[0039] A collision mechanism 6, mounted on the device body 1, is used to push the device mounted on the detection substrate 5 to collide;

[0040] An environment adjustment mechanism, installed on the device body 1, for adjusting the environment in the device body 1; and

[0041] The balancing mechanism 3 is installed on the device body 1 and is used to cause the detection substrate 5 to be in a horizontal balanced state. The balancing mechanism 3 includes a support rod 301, a piston plate 302, a limit frame 303 and a limit assembly 304 installed on the device body 1. The limit frame 303 is arranged in a first cavity 101 opened on the device body 1 and is fixedly connected to the device body 1. The piston plate 302 is slidably matched with the limit frame 303. The piston plate 302 is fixedly connected to the support rod 301, one end of which extends into the first cavity 101 and is slidably matched with the device body 1. The first cavity 101 is filled with liquid (not marked in the figure).

[0042] Preferably, the limiting assembly 304 includes an arc-shaped pressing plate 3041 and a first linear moving member 3042, wherein the arc-shaped pressing plate 3041 is fixedly connected to the output end of the first linear moving member 3042, and the first linear moving member 3042 is fixedly connected to the device body. The purpose of this arrangement is to achieve the technical effect of limiting 301 by using the first linear moving member 3042 to push the arc-shaped pressing plate 3041 to press 301.

[0043] In the embodiment of the present invention, since the first cavity 101 is filled with liquid and the four support rods 301 are all slidably matched with the device body 1, when there is a height difference in the ground contacted by the support rods 301, the support rods 301 at a higher position push the piston plate 302 to squeeze the liquid in the first cavity 101 to flow toward the support rods 301 at a lower position. At this time, the liquid pushes the other piston plate 302 fixedly connected to the support rods 301 to drive the support rods 301 to perform linear motion in the vertical direction until the device body 1 is in a horizontal state as a whole, that is, the detection substrate 5 is in a horizontal state. At this time, the limit assembly 304 is started to limit the four support rods 301 is limited, and the device is installed on the detection substrate 5, so that the device can be installed on the detection substrate 5 in a horizontal state. At this time, the relevant technical personnel start the collision mechanism 6 to give the device installed on the detection substrate 5 a certain kinetic energy to cause it to collide, so as to realize the test of the power loss change of the device before and after the collision, so as to achieve the technical effect of evaluating the quality of the device. At the same time, the relevant technical personnel can adjust the temperature and humidity in the device body 1 through the environmental adjustment mechanism, and perform power loss tests on the device installed on the detection substrate 5 under different temperatures and humidities, so as to achieve the technical effect of evaluating its quality.

[0044] See also Figure 1 , Figure 2 as well as Figure 4 As an embodiment of the present invention, the collision mechanism 6 includes a limit slider 601, the detection substrate 5 is detachably connected to the limit slider 601, the limit slider 601 is slidably matched with the device body 1, and the limit slider 601 is slidably matched with the guide rod 604 fixedly connected to the device body 1, and further includes:

[0045] The displacement assembly 602 is installed on the device body 1 and is used to push the limit slider 601 to perform linear movement in the horizontal direction; and

[0046] The energy supply component 603 is installed on the device body 1 and is used to provide kinetic energy to the limiting slider 601 .

[0047] Preferably, the detection substrate 5 is removably connected to the limit slider 601 by a bolt assembly. Relevant technical personnel in the field should know that the purpose of this setting is to limit the detection substrate 5 on the limit slider 601. Therefore, in some embodiments, the detection substrate 5 can also be removably connected to the limit slider 601 by snap-fitting, or fixedly connected to the limit slider 601 by welding.

[0048] Preferably, the displacement assembly 602 includes a first plate 6021, a second plate 6022 and a second linear motion member 6023, wherein the first plate 6021 is fixedly connected to the limit slider 601, the first plate 6021 is detachably connected to the second plate 6022 via a magnetic unit (not shown in the figure), and the second plate 6022 is fixedly connected to the output end of the second linear motion member 6023 fixedly connected to the device body 1. The purpose of this arrangement is to use the second linear motion member 6023 to push and pull the second plate 6022, so that the second plate 6022 performs a horizontal linear motion in the device body 1, the second plate 6022 drives the first plate 6021 to push the limit slider 601 to perform a horizontal linear motion, and the limit slider 601 pushes the detection substrate 5 connected thereto to perform a synchronous linear motion, so as to enable the detection substrate 5 to be reset after a collision, and at the same time, the position of the limit slider 601 can be controlled by the magnetic unit, that is, the limit slider 601 is limited.

[0049] Preferably, the magnetic attraction unit includes an insertion rod (not marked in the figure), a second elastic member (not marked in the figure), and two groups of electromagnets (not marked in the figure), wherein the insertion rod is slidably matched with a limiting slide groove (not marked in the figure) provided on the second plate body 6022, one end of the insertion rod is fixedly connected to the second elastic member fixedly provided in the limiting slide groove, one group of the electromagnets is embedded in a slot (not marked in the figure) provided in the first plate body 6021 and fixedly connected to the second plate body 6022, and the other group of the electromagnets is embedded and fixedly connected to the other end of the insertion rod. The purpose of this arrangement is to utilize the property of electromagnets that like charges repel each other and opposite charges attract each other, push and pull the insertion rod to perform linear motion in the vertical direction, and enable the insertion rod to be inserted into the slot or retracted into the limiting slide groove, thereby achieving the technical effect of controllably limiting the first plate body 6021 to the second plate body 6022.

[0050] Specifically, the second elastic member is a spring. Those skilled in the art should know that the purpose of this arrangement is to provide elastic support for the insertion rod. Therefore, in some embodiments, the second elastic member can also be configured as either a compression spring or an elastic steel plate.

[0051] Preferably, the energy supply component 603 includes a push rod 6031, a sleeve 6032 and a first elastic member (not marked in the figure), the push rod 6031 and the sleeve 6032 are slidably matched, one end of the push rod 6031 is fixedly connected to the limiting slider 601, and the other end of the push rod 6031 extends into the sleeve 6032, the elastic member is located in the sleeve 6032, and its two ends are respectively fixedly connected to the push rod 6031 and the sleeve 6032, and the end of the sleeve 6032 is fixedly connected to the device body 1. The limit slider 601 performs linear motion in the horizontal direction driven by the displacement component 602. At this time, the limit slider 601 can push the push rod 6031 to squeeze the first elastic member located in the sleeve 6032, and promote itself to perform linear motion in the horizontal direction along the length direction of the sleeve 6032. When it is necessary to energize the detection substrate 5, it is only necessary to release the limit of the limit slider 601 by the displacement component 602, and the compressed first elastic member can be used to energize the detection substrate 5, so that the detection substrate 5 can perform linear motion in the horizontal direction, and collide with the rubber pad (not shown in the figure) fixedly connected to the device body 1 and used in conjunction with the collision mechanism 6, so as to cause the device to collide and vibrate.

[0052] Specifically, the first elastic member is a spring. Relevant technical personnel in the field should know that the purpose of this setting is to provide elastic support for the push rod 6031. Therefore, in some embodiments, the first elastic member can also be set as an elastic steel plate or other parts with elastic contraction energy supply.

[0053] In the embodiment of the present invention, the displacement component 602 can drive the limit slider 601 to perform linear movement in the horizontal direction, so that the limit slider 601 can be reset. At the same time, the reset limit slider 601 can compress the output end of the energy supply component 603 to complete the energizing process of the output end of the energy supply component 603 itself. When it is necessary to perform a collision test on the device installed on the detection substrate 5, it is only necessary to release the limit of the limit slider 601 by the displacement component 602. The detection substrate 5 installed on the limit slider 601 will move linearly in the horizontal direction at a certain initial velocity under the impact of the output end of the energy supply component 603 until the detection substrate 5 hits the rubber pad installed on the device body 1. At this time, relevant technicians can complete the technical effect of device quality detection by comparing the power loss of the device installed on the detection substrate 5 before and after the impact (if the internal unit of the device is not tightly connected, it will shake after the impact, resulting in an increase in the power loss of the device).

[0054] See also Figure 2 , Figure 4 as well as Figure 5The environment adjustment mechanism includes a first pipe 401, a second pipe 402, a first nozzle 403, a second nozzle 404, a temperature sensor (not marked in the figure) and a humidity sensor (not marked in the figure). The first pipe 401 runs through the device body 1 and is fixedly connected to the device body 1. The second pipe 402 runs through the first pipe 401 and is fixedly connected to the first pipe 401. The first nozzle 403 is embedded between the first pipe 401 and the second pipe 402 and is fixedly connected to the two. The second nozzle 404 is fixedly connected to the second pipe 402. A first valve body (not marked in the figure) is embedded and fixedly connected in the second pipe 402. The temperature sensor (not marked in the figure) and the humidity sensor (not marked in the figure) are both fixedly connected in the device body 1.

[0055] Preferably, a third pipe (not shown in the figure) is fixedly connected to the device body 1, one end of the third pipe extends into the device body 1 and the other end extends outside the device body 1, and a second valve body (not shown in the figure) is fixedly connected to the third pipe. The purpose of this arrangement is that when the second valve body is in an open state, the cavity in the device body 1 where the detection substrate 5 is placed is in an air pressure equilibrium state with the external environment. If the second valve body is in a closed state, and air is injected into the cavity through the environment adjustment mechanism 4, the air pressure in the cavity will be increased, and it will not maintain an air pressure equilibrium state with the external environment.

[0056] In the embodiment of the present invention, relevant technicians can introduce high-pressure hot gas into the device body 1 through the first pipe 401. At this time, the two gases collide in the device body 1 and quickly fill the inside of the device body 1. At the same time, the temperature sensor can monitor the temperature of the device body 1 in real time until the temperature in the device body 1 reaches a preset temperature. If the humidity in the device body 1 is to be changed, the relevant technicians release the limit of the support rod 301 by the limit assembly 304 and open the first valve body. At this time, the device body 1 performs linear motion in the vertical direction relative to the support rod 301 under its own gravity, and the piston plate 302 squeezes the liquid in the first cavity 101. The liquid is sprayed into the device body 1 in an atomized state from the second nozzle 404 to change the humidity in the device body 1. The purpose of this setting is to change the temperature and humidity in the device body 1, so that the relevant technicians can test the power loss of the device under different temperature and humidity conditions. At the same time, the liquid in the first cavity 101 can be used as an insulation layer to insulate the space in the device body.

[0057] Preferably, a circulation component 7 for promoting internal circulation of gas inside the device body 1 is provided in the device body 1, and the circulation component 7 includes a box body 701, a fan assembly 702 and air holes 703. The box body 701 is fixedly connected to the upper end of the device body 1, and the two fan assemblies 702 are symmetrically embedded and fixedly connected to the box body 701. Air holes 703 are symmetrically opened on both sides of the box body 701.

[0058] In the embodiment of the present invention, the purpose of this arrangement is to utilize the fan assembly 702 to cooperate with the box 701 to drive the air in the device body 1 to flow alternately between the device body 1 and the internal cavity of the box 701, thereby achieving rapid mixing of the cold air and the hot air in the device body 1, improving the temperature increase efficiency in the device body 1, and at the same time being able to fully mix the mist liquid sprayed from the second pipe 402 with the gas in the device body 1.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wide bandgap power device power loss test device, comprising a device body (1), wherein a door body (2) is installed on the device body (1), characterized in that: Also includes: A detection substrate (5) for conducting a power-on test on the device; A collision mechanism (6) is mounted on the device body (1) and is used to push the device mounted on the detection substrate (5) to collide; An environment adjustment mechanism, mounted on the device body (1) and used to adjust the environment within the device body (1); and A balancing mechanism (3) is mounted on the device body (1) and is used to cause the detection substrate (5) to be in a horizontal balancing state. The balancing mechanism (3) comprises a support rod (301), a piston plate (302), a limit frame (303), and a limit assembly (304) mounted on the device body (1). The limit frame (303) is arranged in a first cavity (101) provided on the device body (1) and is fixedly connected to the device body (1). The piston plate (302) is slidably matched with the limit frame (303). The piston plate (302) is fixedly connected to a support rod (301) having one end extending into the first cavity (101) and slidably matched with the device body (1). The first cavity (101) is filled with liquid. The limit assembly (304) comprises an arc-shaped pressure plate (3041) and a first linear moving member (3042); the arc-shaped pressure plate (3041) is fixedly connected to the output end of the first linear moving member (3042); and the first linear moving member (3042) is fixedly connected to the device body.

2. The wide bandgap power device power loss test device according to claim 1, characterized in that: The collision mechanism (6) comprises a limit slider (601), the detection substrate (5) is detachably connected to the limit slider (601), the limit slider (601) is slidably matched with the device body (1), and the limit slider (601) is slidably matched with a guide rod (604) fixedly connected to the device body (1), and further comprises: A displacement assembly (602) is mounted on the device body (1) and is used to push the limit slider (601) to perform linear movement in a horizontal direction; and The energy supply component (603) is mounted on the device body (1) and is used to provide kinetic energy to the limit slider (601).

3. The wide bandgap power device power loss test device according to claim 2, characterized in that: The displacement assembly (602) comprises a first plate (6021), a second plate (6022) and a second linear motion member (6023); the first plate (6021) is fixedly connected to the limit slider (601); the first plate (6021) is detachably connected to the second plate (6022) via a magnetic unit; the second plate (6022) is fixedly connected to an output end of a second linear motion member (6023) fixedly connected to the device body (1).

4. The wide bandgap power device power loss test device according to claim 2, characterized in that: The energy supply component (603) comprises a push rod (6031), a sleeve (6032) and a first elastic member. The push rod (6031) and the sleeve (6032) are slidably matched. One end of the push rod (6031) is fixedly connected to the limit slider (601), and the other end of the push rod (6031) extends into the sleeve (6032). The elastic member is located in the sleeve (6032), and its two ends are respectively fixedly connected to the push rod (6031) and the sleeve (6032). The end of the sleeve (6032) is fixedly connected to the device body (1).

5. The wide bandgap power device power loss test device according to claim 3, characterized in that: The magnetic attraction unit includes an insertion rod, a second elastic member, and two groups of electromagnets. The insertion rod is slidably matched with a limiting slide groove provided on the second plate body (6022). One end of the insertion rod is fixedly connected to the second elastic member fixedly arranged in the limiting slide groove. One group of electromagnets is embedded in a slot provided in the first plate body (6021) and is fixedly connected to the second plate body (6022), and the other group of electromagnets is embedded and fixedly connected to the other end of the insertion rod.

6. The wide bandgap power device power loss test device according to claim 1, characterized in that: The environment adjustment mechanism comprises a first pipe (401), a second pipe (402), a first nozzle (403), a second nozzle (404), a temperature sensor and a humidity sensor; the first pipe (401) passes through the device body (1) and is fixedly connected to the device body (1); the second pipe (402) passes through the first pipe (401) and is fixedly connected to the first pipe (401); the first nozzle (403) is embedded between the first pipe (401) and the second pipe (402) and is fixedly connected to the two; the second nozzle (404) is fixedly connected to the second pipe (402); a first valve body is embedded and fixedly connected in the second pipe (402); and the temperature sensor and the humidity sensor are both fixedly connected to the device body.

7. The wide bandgap power device power loss test device according to claim 6, characterized in that: A third pipe is fixedly connected to the device body (1), one end of the third pipe extends into the device body (1) and the other end extends outside the device body (1), and a second valve body is fixedly connected inside the third pipe.

8. The wide bandgap power device power loss test device according to claim 1, characterized in that: A circulation component (7) for promoting internal circulation of gas within the device body (1) is arranged within the device body (1).

9. The wide bandgap power device power loss test device according to claim 8, characterized in that: The circulation component (7) comprises a box (701), a fan assembly (702) and air holes (703); the box (701) is fixedly connected to the upper end of the device body (1); two fan assemblies (702) are symmetrically embedded and fixedly connected to the box (701); and air holes (703) are symmetrically provided on both sides of the box (701).

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