Dynamic switching characteristic testing device for silicon carbide power device
By designing a dynamic switching characteristic testing device for silicon carbide power devices, simulating temperature, wind speed, wind direction, and electromagnetic interference environments, the problem that existing technologies cannot fully reflect the actual performance of devices through test results is solved, thus achieving accuracy and comprehensiveness in the test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-27
AI Technical Summary
Existing silicon carbide power device testing equipment fails to perform simultaneous testing under different temperature environments or magnetic field influences, resulting in test results that cannot fully reflect the device's performance in actual working environments.
A dynamic switching characteristic testing device for silicon carbide power devices was designed, comprising components such as a test chamber, a wind box, a moving track, a drive unit, fan blades, an electromagnetic plate, and a drive gear. It can simulate different temperature, wind speed, wind direction, and electromagnetic interference environments to ensure the accuracy and comprehensiveness of the test results.
By simulating real-world application environments, the comprehensiveness and accuracy of test results are improved, ensuring that the performance of silicon carbide power devices under different conditions can be fully reflected.
Smart Images
Figure CN224052362U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to test device technical field especially relates to a silicon carbide power device dynamic switch characteristic testing device. BACKGROUND
[0002] With the rapid development of power electronics technology, silicon carbide power devices have been widely concerned in high temperature, high pressure and high frequency application fields due to their excellent physical properties. Silicon carbide power devices have the advantages of high withstand voltage, low on-resistance, high thermal conductivity, etc., which make them have significant advantages in power conversion efficiency and system miniaturization. However, the dynamic switching characteristics of silicon carbide power devices have an important influence on the performance of the entire power system in practical application. Therefore, accurate testing of the dynamic switching characteristics of silicon carbide power devices is of great significance for the optimization design and application of the devices.
[0003] The existing test method and device detect the switching characteristics of silicon carbide power devices by sending double-pulse control signals to the devices under test, observing their turn-on and turn-off processes, and recording the relevant switching waveforms. However, there is no synchronous detection under the influence of different temperature environments or magnetic fields, which leads to the fact that the test results cannot fully reflect the performance of the devices in actual working environments. UTILITY MODEL CONTENT
[0004] The utility model aims at solving the problem that there is no synchronous detection under the influence of different temperature environments or magnetic fields in the prior art, which leads to the fact that the test results cannot fully reflect the performance of the devices in actual working environments, and proposes a silicon carbide power device dynamic switching characteristic testing device.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] A silicon carbide power device dynamic switching characteristic testing device, comprising a test box and a wind box fixedly installed in the test box, further comprising: two movable rails fixedly connected in the test box, wherein a mounting plate is slidably installed in the movable rail, and a driving part for driving the mounting plate to slide is arranged in the movable rail, and a plurality of fan blades are rotatably installed in the wind box, wherein a driving gear is rotatably installed in the test box, and a swing part for controlling the swing of the fan blades is arranged on the driving gear.
[0007] Preferably, the driving part comprises a threaded rod rotatably installed in the movable rail, a matching block is engagedly installed on the threaded rod, and the mounting plate is fixedly connected to the two matching blocks.
[0008] In order to drive the threaded rod to rotate, preferably, the threaded rod is fixedly connected with a linkage gear, the test box is rotatably provided with an annular toothed plate, and the linkage gear is rotatably provided with the inner teeth of the annular toothed plate, wherein the test box is rotatably provided with two drive gears, the two drive gears are rotatably provided with the outer teeth of the annular toothed plate, the test box is fixedly connected with a drive motor, and the output shaft of the drive motor is fixedly connected with any one of the drive gears.
[0009] In order to detect the magnetic field, further, the drive gear is fixedly connected with a transmission shaft, the transmission shaft is rotatably arranged in the test box, the transmission shaft is fixedly connected with the output shaft of the drive motor, the annular toothed plate is fixedly connected with a plurality of electromagnetic plates, the test box is provided with a sliding groove, and the electromagnetic plates are slidably arranged in the sliding groove.
[0010] In order to fix the power device, further, the mounting plate is fixedly connected with a limiting rod at four corners, the limiting rod is slidably provided with a clamping plate, the clamping plate is fixedly connected with a supporting spring, and the free end of the supporting spring is fixedly connected to the limiting rod.
[0011] In order to drive a plurality of fan blades to swing and adjust, further, the air bellow is rotatably provided with a plurality of first connecting rods, the fan blades are fixedly connected to the first connecting rods, the first connecting rods are fixedly connected with rotating plates, the rotating plates are fixedly connected with second connecting rods, and the second connecting rods are fixedly connected through the connecting plate.
[0012] In order to make the fan blades swing automatically, further, the drive gear is fixedly connected with a third connecting rod, the test box is provided with an adjusting groove, the third connecting rod is slidably arranged in the adjusting groove, the third connecting rod is rotatably provided with a rocker arm, wherein the rocker arm is fixedly connected with a fourth connecting rod, the fourth connecting rod is rotatably provided with a sliding plate, the test box is fixedly connected with a sliding rail, the sliding plate is slidably arranged in the sliding rail, the sliding plate is fixedly connected with a fifth connecting rod, the fifth connecting rod is rotatably provided with a pull rod, the pull rod is fixedly connected with a sixth connecting rod, and the sixth connecting rod is fixedly connected to the connecting plate.
[0013] Compared with the prior art, the carbonized silicon power device dynamic switching characteristic test device has the following beneficial effects:
[0014] 1. The carbonized silicon power device dynamic switching characteristic test device drives the linkage gear to rotate through the annular toothed plate, further drives the threaded rod to rotate, makes the matching block slide along the moving track, realizes the accurate movement of the mounting plate, ensures that the carbonized silicon power device accurately moves according to different test positions in the test process, and ensures the accuracy of the test result.
[0015] 2. The silicon carbide power device dynamic switching characteristic testing device, through the fixed installation of a plurality of electromagnetic plates on the annular tooth plate, the electromagnetic plates can slide along the sliding groove, thereby realizing the adjustment of the magnetic field intensity, so that the testing device can test the dynamic switching characteristic of the silicon carbide power device under different magnetic field environments, thereby more comprehensively reflecting the performance of the device in the actual working environment.
[0016] 3. The silicon carbide power device dynamic switching characteristic testing device, through the driving gear drives the swing arm to swing, and then controls the swing of the third connecting rod, so that the sliding plate slides in the sliding rail, thereby realizing the automatic swing adjustment of the fan blade, not only improving the flexibility of the testing device, but also simulating the working state of the silicon carbide power device under different wind speeds and wind directions in actual application, further ensuring the comprehensiveness and accuracy of the test results.
[0017] The part not involved in the device is the same as or can be realized by the prior art, the automatic swing adjustment of the fan blade not only improves the flexibility of the testing device, but also simulates the working state of the silicon carbide power device under different wind speeds and wind directions in actual application, further ensuring the comprehensiveness and accuracy of the test results. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The utility model proposes a kind of overall structure schematic diagram of silicon carbide power device dynamic switching characteristic testing device;
[0019] Figure 2 The utility model proposes a kind of inside structure schematic diagram of testing box of silicon carbide power device dynamic switching characteristic testing device;
[0020] Figure 3 The utility model proposes a kind of bellows structure schematic diagram of silicon carbide power device dynamic switching characteristic testing device;
[0021] Figure 4 The utility model proposes a kind of mounting plate structure schematic diagram of silicon carbide power device dynamic switching characteristic testing device;
[0022] Figure 5 The utility model proposes a kind of silicon carbide power device dynamic switching characteristic testing device; Figure 3 The utility model proposes a kind of structure schematic diagram of A place in;
[0023] Figure 6 The utility model proposes a kind of electromagnetic plate structure diagram of silicon carbide power device dynamic switching characteristic testing device.
[0024] In the figure: 1, test box; 11, box door; 12, adjusting groove; 13, sliding groove; 14, moving track; 2, air bellow; 21, fan blade; 22, first connecting rod; 23, rotating plate; 24, second connecting rod; 25, connecting plate; 3, mounting plate; 31, linkage gear; 32, threaded rod; 33, matching block; 34, limiting rod; 35, clamping plate; 36, supporting spring; 4, electromagnetic plate; 41, annular toothed plate; 42, driving gear; 43, driving motor; 44, transmission shaft; 45, third connecting rod; 46, rocker arm; 47, fourth connecting rod; 48, sliding rail; 49, sliding plate; 410, fifth connecting rod; 411, pull rod; 412, sixth connecting rod. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0026] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model in a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model.
[0027] Embodiment:
[0028] Reference Figures 1-6 A silicon carbide power device dynamic switching characteristic testing device, comprising a test box 1 and an air bellow 2 fixedly installed in the test box 1, the test box 1 is rotatably installed with a box door 11, the test box 1 and the box door 11 provide necessary protection and isolation for the internal test environment, ensure the accuracy and safety of the test, the air bellow 2 is used for providing a specific test environment and can be adjusted in temperature, to simulate the working environment of the silicon carbide power device in actual application, further comprising: two moving tracks 14 fixedly connected in the test box 1, wherein the moving track 14 is slidably installed with a mounting plate 3 for fixing and supporting the measured silicon carbide power device, to ensure the stability and accuracy of the device during the test process, the moving track 14 enables the mounting plate 3 and the measured device thereon to be conveniently moved and adjusted in position, the moving track 14 is provided with a driving part for driving the mounting plate 3 to slide, a plurality of fan blades 21 rotatably installed in the air bellow 2, the fan blades 21 generate air flow by rotating, for simulating a specific test environment, wherein the test box 1 is rotatably installed with a driving gear 42, the driving gear 42 is provided with a swing part for controlling the swing of the fan blades 21, so as to realize accurate control of the air flow.
[0029] With reference to Figures 2-4 , the driving part comprises a threaded rod 32 rotatably installed in the moving track 14, and a matching block 33 is installed in mesh with the threaded rod 32, so that when the threaded rod 32 rotates, the matching block 33 moves along the axial direction of the threaded rod 32, and the mounting plate 3 is fixedly connected to the two matching blocks 33, so that when the matching block 33 moves, the mounting plate 3 and the measured silicon carbide power device thereon also move, and the threaded rod 32 is fixedly connected with a linkage gear 31, and an annular toothed plate 41 is rotatably installed in the test box 1, and the linkage gear 31 is installed in mesh with the inner teeth of the annular toothed plate 41, so that when the annular toothed plate 41 rotates, the linkage gear 31 is driven to rotate, wherein two driving gears 42 are rotatably installed in the test box 1, and the two driving gears 42 are installed in mesh with the outer teeth of the annular toothed plate 41, so that when the driving gear 42 rotates, the annular toothed plate 41 is driven to rotate synchronously, and the test box 1 is fixedly connected with a driving motor 43, the output shaft of the driving motor 43 is fixedly connected with any one of the driving gears 42, the driving gear 42 is fixedly connected with a transmission shaft 44, and the transmission shaft 44 is rotatably installed in the test box 1 and is fixedly connected with the output shaft of the driving motor 43, so that when the driving motor 43 is started, the transmission shaft 44 and the driving gear 42 connected therewith are driven to rotate, and a plurality of electromagnetic plates 4 are fixedly connected to the annular toothed plate 41 and rotate with the rotation of the annular toothed plate 41, and a sliding groove 13 is formed in the test box 1, and the electromagnetic plates 4 are slidably installed in the sliding groove 13, so that when the annular toothed plate 41 rotates, the electromagnetic plates 4 slide in the sliding groove 13, thereby changing the electromagnetic field distribution in the test environment to simulate the electromagnetic interference that the silicon carbide power device may encounter in actual application. In addition, the silicon carbide power device dynamic switching characteristic test device further comprises the electromagnetic plates 4, and the annular toothed plate 41 is arranged on the electromagnetic plates 4, and the sliding of the electromagnetic plates 4 can simulate the electromagnetic interference that the silicon carbide power device may encounter in actual application, thereby ensuring the accuracy and reliability of the test results.
[0030] With reference to Figure 4 , the mounting plate 3 is fixedly connected with a limiting rod 34 at the four corners, which provides a sliding track for the clamping plate 35 to ensure that the clamping plate 35 can maintain a stable path during movement, and the clamping plate 35 is slidably installed on the limiting rod 34 and is used for clamping and fixing the measured silicon carbide power device, and the clamping plate 35 is fixedly connected with a supporting spring 36, and the free end of the supporting spring 36 is fixedly connected to the limiting rod 34, so that the supporting spring 36 is compressed to generate a certain elastic force, thereby ensuring that the clamping plate 35 can tightly clamp the measured device to prevent it from shaking or falling off during the test.
[0031] With reference to Figures 2-6The first connecting rods 22 are rotatably installed in the wind box 2, and are used as supporting and driving parts of the fan blades 21, the fan blades 21 are fixedly connected to the first connecting rods 22, the rotating plates 23 are fixedly connected to the first connecting rods 22, the second connecting rods 24 are fixedly connected to the rotating plates 23, the second connecting rods 24 are fixedly connected through the connecting plate 25, the connecting plate 25 is a central part of the fan structure, and the connecting plate 25 connects the plurality of second connecting rods 24 into a whole, the third connecting rod 45 is fixedly connected to the driving gear 42, the adjusting groove 12 is formed in the test box 1, the third connecting rod 45 is slidably installed in the adjusting groove 12, the rocker arm 46 is rotatably installed on the third connecting rod 45, the fourth connecting rod 47 is fixedly connected to the rocker arm 46, the sliding plate 49 is rotatably installed on the fourth connecting rod 47, the sliding rail 48 is fixedly connected to the test box 1, the sliding plate 49 is slidably installed in the sliding rail 48, the fourth connecting rod 47 drives the sliding plate 49 to realize reciprocating movement on the sliding rail 48, the fifth connecting rod 410 is fixedly connected to the sliding plate 49, the pull rod 411 is rotatably installed on the fifth connecting rod 410, the reciprocating movement of the sliding plate 49 is transmitted to the pull rod 411, the sixth connecting rod 412 is fixedly connected to the pull rod 411, the sixth connecting rod 412 is fixedly connected to the connecting plate 25 and transmits the movement to the connecting plate 25, the sixth connecting rod 412 converts the rotating movement of the driving gear 42 into the overall rotating movement of the fan structure through the connecting plate 25, so that the generation and adjustment of the airflow in the wind box 2 are realized.
[0032] In the utility model, the test box 1 and the wind box 2 jointly constitute a closed test environment, the test box 1 not only provides necessary protection and isolation for the test, but also the temperature in the test box 1 can be adjusted through the wind box 2 to simulate the working state of the silicon carbide power device under different temperatures, the fan blades 21 in the wind box 2 generate airflow through rotation, and the precise control of the annular toothed plate 41 and the driving gear 42 can simulate the wind speed and wind direction changes that the device may encounter in actual application.
[0033] In the test process, the measured silicon carbide power device is fixed on the mounting plate 3, the mounting plate 3 can be conveniently adjusted in position through the cooperation of the moving track 14 and the driving part to adapt to different test requirements, the driving part includes the threaded rod 32 and the cooperation block 33, the cooperation of the threaded rod 32 and the cooperation block 33 enables the mounting plate 3 and the device thereon to slide along the moving track 14, the meshing installation of the linkage gear 31 and the annular toothed plate 41, and the starting of the driving motor 43 jointly realize the precise control of the mounting plate 3.
[0034] In order to simulate electromagnetic interference that may be encountered in actual applications, the test device further comprises an electromagnetic plate 4 and a sliding groove 13, sliding of the electromagnetic plate 4 in the sliding groove 13 can change the electromagnetic field distribution in the test environment, in addition, cooperation of the limiting rod 34 and the clamping plate 35 ensures stability and accuracy of the device under test during the test, the supporting spring 36 on the clamping plate 35 provides a stable clamping force, preventing the device from shaking or falling off during the test, the first connecting rod 22, the rotating plate 23, the second connecting rod 24 and the connecting plate 25 in the wind box 2 jointly constitute a fan structure, through transmission of the driving gear 42 and the third connecting rod 45, generation and adjustment of airflow in the wind box 2 are realized.
[0035] The silicon carbide power device dynamic switching characteristic test device can simulate working states of the silicon carbide power device in actual applications by precisely controlling temperature, wind speed, wind direction and electromagnetic interference in the test environment, thereby ensuring accuracy and reliability of test results.
[0036] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A device for testing dynamic switching characteristics of silicon carbide power devices, comprising a test box (1) and a wind box (2) fixedly installed in the test box (1), characterized in that, Also includes: Two moving tracks (14) are fixedly connected in the test box (1), Wherein, the mounting plate (3) is slidably installed in the moving track (14), and the driving part for driving the mounting plate (3) to slide is arranged in the moving track (14); A plurality of fan blades (21) are rotatably installed in the wind box (2), Wherein, the driving gear (42) is rotatably installed in the test box (1), and the swing part for controlling the swing of the fan blade (21) is arranged on the driving gear (42).
2. The apparatus of claim 1, wherein, The driving part includes a threaded rod (32) rotatably installed in the moving track (14), a matching block (33) is engagedly installed on the threaded rod (32), and the mounting plate (3) is fixedly connected to the two matching blocks (33).
3. The apparatus of claim 2, wherein the apparatus further comprises a voltage source connected to the gate of the silicon carbide power device. The threaded rod (32) is fixedly connected with a linkage gear (31), the test box (1) is rotatably installed with an annular toothed plate (41), the linkage gear (31) is meshingly installed with the inner teeth of the annular toothed plate (41), Wherein, the test box (1) is rotatably installed with two driving gears (42), the two driving gears (42) are meshingly installed with the outer teeth of the annular toothed plate (41), the test box (1) is fixedly connected with a driving motor (43), and the output shaft of the driving motor (43) is fixedly connected with any driving gear (42).
4. The apparatus of claim 3, wherein the apparatus further comprises a voltage source connected to the gate of the power MOSFET. The driving gear (42) is fixedly connected with a transmission shaft (44), the transmission shaft (44) is rotatably installed in the test box (1), the transmission shaft (44) is fixedly connected with the output shaft of the driving motor (43), a plurality of electromagnetic plates (4) are fixedly connected on the annular toothed plate (41), and a sliding groove (13) is formed in the test box (1). The electromagnetic plate (4) is slidably installed in the sliding groove (13).
5. The apparatus of claim 1, wherein, The limiting rod (34) is fixedly connected to the mounting plate (3), the clamping plate (35) is slidably installed on the limiting rod (34), the supporting spring (36) is fixedly connected to the clamping plate (35), and the free end of the supporting spring (36) is fixedly connected to the limiting rod (34).
6. The apparatus of claim 1, wherein, A plurality of first connecting rods (22) are rotatably installed in the wind box (2), the fan blade (21) is fixedly connected to the first connecting rod (22), the first connecting rod (22) is fixedly connected with a rotating plate (23), the second connecting rod (24) is fixedly connected to the rotating plate (23), and a plurality of second connecting rods (24) are fixedly connected through the connecting plate (25).
7. The apparatus of claim 6, wherein the apparatus further comprises a voltage source connected to the gate of the power MOSFET. The third connecting rod (45) is fixedly connected to the driving gear (42), the adjusting groove (12) is formed in the test box (1), the third connecting rod (45) is slidably installed in the adjusting groove (12), the rocker arm (46) is rotatably installed on the third connecting rod (45), The rocker arm (46) is fixedly connected with a fourth connecting rod (47), the fourth connecting rod (47) is rotatably installed with a sliding plate (49), the test box (1) is fixedly connected with a sliding rail (48), the sliding plate (49) is slidably installed in the sliding rail (48), the sliding plate (49) is fixedly connected with a fifth connecting rod (410), the fifth connecting rod (410) is rotatably installed with a pull rod (411), the pull rod (411) is fixedly connected with a sixth connecting rod (412), and the sixth connecting rod (412) is fixedly connected with the connecting plate (25).