Device and method for testing dynamic parameters of power device

Abstract

The invention relates to the technical field of power device testing devices, and discloses a power device dynamic parameter testing device and method.The power device dynamic parameter testing device comprises a mounting plate and a testing assembly arranged above the mounting plate, the testing assembly comprises a vertical plate fixedly connected to the top of the mounting plate, and the top of the vertical plate is fixedly connected with a top plate; the side wall of the vertical plate is fixedly connected with a forward and reverse rotation motor, the output end of the forward and reverse rotation motor is fixedly connected with a lead screw, the lead screw movably penetrates through the outer wall of one top plate and extends into the top plate, the other end of the lead screw is fixedly connected with the side wall of the other top plate, and the outer wall of the lead screw is in threaded connection with a sleeving block. The top of the sleeving block is slidably connected with the bottom of the top plate, the bottom of the side face of the sleeving block is fixedly connected with an air cylinder, the output end of the air cylinder is fixedly connected with a tester, by arranging the testing assembly, the sleeving block is promoted to move through rotation of the lead screw, and therefore the testing position of the tester is adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of power device testing devices, and in particular to a power device dynamic parameter testing device and method. Background Art

[0002] The power device dynamic parameter test device and method are usually used to test the dynamic performance of power semiconductor devices (such as IGBT, MOSFET, SiC, GaN, etc.) under actual working conditions, including switching characteristics, reverse recovery time, driving characteristics, etc. These dynamic parameters are very important for the design, control strategy and application of power devices.

[0003] According to a power device dynamic parameter and reliability test system and test method proposed in Chinese patent CN115932525A, the simulation of the inductive load circuit applied to IGBT is realized. In combination with functional modules such as drive module and control module, the on-off control of IGBT can be realized, and the dynamic performance and static performance test of IGBT can be performed; the dynamic and static parameters of IGBT can be intuitively understood through the oscilloscope, which is more conducive to performance analysis.

[0004] According to a power device testing device proposed by Chinese patent CN220933123U, by starting the motor output end to rotate forward and reverse, the two adjustment plates can be driven to slide and adjust the spacing, and the electric push rod output end can be extended and retracted to drive the power transmission rod to move up and down, and then rapid debugging can be performed according to the size of the power device to be tested, which effectively expands the detection range of the power device testing device and saves the cost of power device testing equipment.

[0005] There are some shortcomings in the power device dynamic parameter testing device in the prior art. In the prior art, during the test of the power device, the power device is usually placed on a workbench, and then the operator tests the surface of the power device by holding a power transmission rod. During the test, it is not convenient for the operator to adjust the test position on the surface of the power device. The operation process is cumbersome, which affects the test efficiency of the power device. For this reason, we propose a power device dynamic parameter testing device and method. Summary of the invention

[0006] The purpose of the present invention is to provide a device and method for testing dynamic parameters of a power device, which solves the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power device dynamic parameter testing device, comprising a mounting plate, and a test assembly arranged above the mounting plate, the test assembly comprising a vertical plate fixedly connected to the top of the mounting plate, the top of the vertical plate fixedly connected to the top plate, the side wall of the vertical plate fixedly connected to the forward and reverse motor, the output end of the forward and reverse motor fixedly connected to a lead screw, the lead screw movably penetrates the outer wall of the top plate and extends to the inside of the top plate, the other end of the lead screw is fixedly connected to the side wall of another top plate, the outer wall of the lead screw is threadedly connected to a socket block, and the top of the socket block is slidably connected to the bottom of the top plate. A cylinder is fixedly connected to the bottom of the side of the socket block, and a tester is fixedly connected to the output end of the cylinder. By setting the test component, when a dynamic test is required, the operator turns on the cylinder to cause the output end of the cylinder to push the tester down, thereby adjusting the test height of the tester and performing a dynamic parameter test through the tester. When the test position of the tester needs to be adjusted, the operator turns on the forward and reverse motors to cause the screw rod to rotate. During the rotation of the screw rod, the socket block will be moved laterally along the outer wall of the screw rod, thereby realizing the movement of the tester, which is convenient for adjusting the position of the tester for dynamic parameter testing.

[0008] Preferably, an adjusting component is provided at the bottom of the mounting plate, and the adjusting component includes a support frame fixedly connected to the bottom of the mounting plate, the bottom inner wall of the support frame is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to an output shaft, the top of the output shaft is fixedly connected to a turntable, the outer wall of the turntable is slidably connected to the inner wall of the mounting plate, the top of the turntable is fixedly connected to a side plate, the inner wall of the side plate is threadedly connected to a screw, one end of the screw is fixedly connected to an adjusting handle on the outer wall, the other end of the screw is rotatably connected to a rubber block, the bottom of the rubber block is slidably connected to the top of the turntable, the top of the turntable is fixedly connected to a support table, the top of the support table is slidably connected to a power device, the outer wall of the power device is connected to the rubber The side walls of the rubber block are slidably connected, and an adjustment component is set. When the power device needs to be dynamically tested, the power device needs to be clamped and fixed. At this time, the operator places the power device on the top of the support table, and then turns the adjustment handle to cause the screw to rotate. During the rotation of the screw, the rubber block will move with it, and the rubber blocks on both sides of the support table will fit with the outer wall of the power device, thereby clamping and fixing the power device. When other power devices need to be tested, the operator turns on the drive motor to cause the output shaft to rotate. During the rotation of the output shaft, the turntable will rotate, thereby causing the power device on the top of the turntable to rotate, which is convenient for the tester to test other power devices.

[0009] Preferably, the adjustment component also includes a driving wheel fixedly connected to the outer wall of the output shaft, the side wall of the driving wheel is meshed with a driven wheel, the inner wall of the driven wheel is fixedly connected to the first transmission shaft, the middle outer wall of the first transmission shaft is rotatably connected to a cross block through a bearing, the side wall of the cross block is fixedly connected to the outer wall of the mounting plate, the top of the first transmission shaft is fixedly connected to a worm, the outer wall of the worm is transmission-connected to a worm wheel, the inner wall of the worm wheel is fixedly connected to a second transmission shaft, the outer wall of the second transmission shaft is rotatably connected to a support plate through a bearing, the bottom of the support plate is fixedly connected to the top of the mounting plate, the outer wall of the other end of the second transmission shaft is fixedly connected to a cleaning roller, the bottom of the cleaning roller is slidably connected to the top of the power device, during the rotation of the output shaft, the driven wheel will be rotated by the driving wheel, the first transmission shaft will be rotated, and the worm will be rotated, the worm wheel and the second transmission shaft will be rotated, during the rotation of the second transmission shaft, the cleaning roller will be rotated, the cleaning roller will be cleaned from impurities on the surface of the power device, and the dynamic parameter test effect of the power device will be improved.

[0010] Preferably, the bottom of the mounting plate is fixedly connected with a support leg, and there are four support legs. The four support legs are equal in size and fixedly connected to the four corners of the bottom of the mounting plate at equal distances. By setting four support legs, the mounting plate can be stably supported by the four support legs.

[0011] Preferably, the bottom of the top plate is slidably connected to the top of the socket block, and the inner wall of the socket block is threadedly connected to the outer wall of the screw rod. By arranging the top plate, the socket block and the screw rod, the socket block is convenient to move on the outer wall of the screw rod.

[0012] Preferably, there are four support platforms, the four support platforms are equal in size, and the four support platforms are distributed on the top of the turntable in a circular array along the central axis of the turntable.

[0013] Preferably, the outer wall of the turntable is matched with the inner wall of the mounting plate, and the top of the turntable is fixedly connected to the top of the support platform.

[0014] Preferably, the rubber blocks are divided into four groups, two in each group, and the two rubber blocks in each group are symmetrically distributed along the center plane of the power device. By arranging the rubber blocks, it is convenient to clamp and fix the power device while preventing the outer wall of the power device from being clamped.

[0015] Preferably, the bottom of the power device is slidably connected to the top of the support platform, and the top of the power device is slidably connected to the outer wall of the cleaning roller. By providing the cleaning roller, it is convenient to clean the dust and impurities on the surface of the power device.

[0016] A method for testing dynamic parameters of a power device comprises the following steps:

[0017] S1. First, place the power device on the top of the support platform and clamp and fix the power device with a rubber block;

[0018] S2, then the cylinder is turned on to push the tester down to perform dynamic parameter testing on the power device, and the forward and reverse motors are turned on to rotate the lead screw to adjust the test position of the tester;

[0019] S3, then the turntable is rotated to perform parameter tests on other power devices;

[0020] S4. Finally, the impurities on the surface of the power device after the test are cleaned by a cleaning roller.

[0021] The present invention provides a device and method for testing dynamic parameters of a power device. The device and method for testing dynamic parameters of a power device have the following beneficial effects:

[0022] (1) The power device dynamic parameter test device and method, by setting a test component, when a dynamic test is required, the operator turns on the cylinder to cause the output end of the cylinder to push the tester down, thereby adjusting the test height of the tester, and performing a dynamic parameter test through the tester. When the test position of the tester needs to be adjusted, the operator turns on the forward and reverse motors to cause the lead screw to rotate. During the rotation of the lead screw, the sleeve block moves laterally along the outer wall of the lead screw, thereby realizing the movement of the tester, so as to facilitate the adjustment of the position of the tester for dynamic parameter testing;

[0023] (2) The power device dynamic parameter test device and method, by setting an adjustment component, when it is necessary to perform a dynamic test on the power device, the power device needs to be clamped and fixed. At this time, the operator places the power device on the top of the support table, and then rotates the adjustment handle to cause the screw to rotate. During the rotation of the screw, the rubber block will move, and the rubber blocks on both sides of the support table will fit with the outer wall of the power device, thereby achieving clamping and fixing of the power device. When it is necessary to test other power devices, the operator turns on the drive motor to cause the output shaft to rotate. During the rotation of the output shaft, the turntable will rotate, thereby causing the power device on the top of the turntable to rotate, so that the tester can test other power devices. During the rotation of the output shaft, the driven wheel will rotate through the active wheel, causing the first transmission shaft to rotate, and the worm will rotate, causing the worm wheel and the second transmission shaft to rotate. During the rotation of the second transmission shaft, the cleaning roller will rotate, causing the cleaning roller to clean impurities on the surface of the power device, thereby improving the dynamic parameter test effect of the power device;

[0024] (3) The present invention improves the repeatability and reliability of the test, has a high degree of automation in the test process, reduces human errors, has strong adaptability, and can be used to test different types of power devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 is a cross-sectional view of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the test assembly in the present invention;

[0028] Figure 4 It is a structural schematic diagram of the regulating component in the present invention;

[0029] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0030] Figure 6 It is a side structural schematic diagram of the adjustment component in the present invention;

[0031] Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0032] In the figure: 1. mounting plate; 2. supporting leg; 31. testing assembly; 311. vertical plate; 312. top plate; 313. forward and reverse motor; 314. lead screw; 315. socket block; 316. cylinder; 317. tester; 32. adjusting assembly; 321. supporting frame; 322. driving motor; 323. output shaft; 324. turntable; 325. side plate; 326. screw; 327. adjusting handle; 328. rubber block; 329. supporting table; 3210. power device; 3211. driving wheel; 3212. driven wheel; 3213. cross block; 3214. first transmission shaft; 3215. worm; 3216. worm wheel; 3217. second transmission shaft; 3218. supporting plate; 3219. cleaning roller. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0034] A preferred embodiment of a power device dynamic parameter testing device and method provided by the present invention is as follows: Figures 1 to 7As shown: a power device dynamic parameter test device, including a mounting plate 1, and a test assembly 31 arranged above the mounting plate 1, the test assembly 31 includes a vertical plate 311 fixedly connected to the top of the mounting plate 1, the top of the vertical plate 311 is fixedly connected to a top plate 312, the side wall of the vertical plate 311 is fixedly connected to a forward and reverse motor 313, the output end of the forward and reverse motor 313 is fixedly connected to a screw rod 314, the screw rod 314 movably penetrates the outer wall of the top plate 312 and extends to the inside of the top plate 312, the other end of the screw rod 314 is fixedly connected to the side wall of another top plate 312, the outer wall of the screw rod 314 is threadedly connected to a socket block 315, the top of the socket block 315 is slidably connected to the bottom of the top plate 312, and the side bottom of the socket block 315 is fixed A cylinder 316 is connected, and the output end of the cylinder 316 is fixedly connected to a tester 317. By setting a test component, when a dynamic test is required, the operator turns on the cylinder 316 to cause the output end of the cylinder 316 to push the tester 317 down, thereby adjusting the test height of the tester 317 and performing a dynamic parameter test through the tester 317. When the test position of the tester 317 needs to be adjusted, the operator turns on the forward and reverse motor 313 to cause the screw rod 314 to rotate. During the rotation of the screw rod 314, the sleeve block 315 will move laterally along the outer wall of the screw rod 314, thereby realizing the movement of the tester 317, thereby facilitating the adjustment of the position of the tester 317 for dynamic parameter testing.

[0035] A preferred embodiment of a power device dynamic parameter testing device and method provided by the present invention is as follows: Figures 1 to 7As shown: an adjustment component 32 is provided at the bottom of the mounting plate 1, and the adjustment component 32 includes a support frame 321 fixedly connected to the bottom of the mounting plate 1, a driving motor 322 is fixedly connected to the inner wall of the bottom of the support frame 321, an output end of the driving motor 322 is fixedly connected to an output shaft 323, a turntable 324 is fixedly connected to the top of the output shaft 323, an outer wall of the turntable 324 is slidably connected to the inner wall of the mounting plate 1, a side plate 325 is fixedly connected to the top of the turntable 324, a screw 326 is threadedly connected to the inner wall of the side plate 325, an adjustment handle 327 is fixedly connected to the outer wall of one end of the screw 326, a rubber block 328 is rotatably connected to the other end of the screw 326, the bottom of the rubber block 328 is slidably connected to the top of the turntable 324, a support platform 329 is fixedly connected to the top of the turntable 324, a power device 3210 is slidably connected to the top of the support platform 329, and the outer wall of the power device 3210 is slidably connected to the side wall of the rubber block 328, By setting the adjustment component 32, when it is necessary to perform dynamic testing on the power device 3210, the power device 3210 needs to be clamped and fixed. At this time, the operator places the power device 3210 on the top of the support platform 329, and then rotates the adjustment handle 327 to cause the screw 326 to rotate. During the rotation of the screw 326, the rubber block 328 will move, and the rubber blocks 328 on both sides of the support platform 329 will fit with the outer wall of the power device 3210, so as to achieve clamping and fixing of the power device 3210. When it is necessary to test other power devices 3210, the operator turns on the drive motor 322 to cause the output shaft 323 to rotate. During the rotation of the output shaft 323, the turntable 324 will be rotated, thereby causing the power device 3210 on the top of the turntable 324 to rotate, so that the tester 317 can test other power devices 3210.

[0036] The adjusting assembly 32 also includes a driving wheel 3211 fixedly connected to the outer wall of the output shaft 323, the side wall of the driving wheel 3211 is meshed with a driven wheel 3212, the inner wall of the driven wheel 3212 is fixedly connected to the first transmission shaft 3214, the middle outer wall of the first transmission shaft 3214 is rotatably connected to a cross block 3213 through a bearing, the side wall of the cross block 3213 is fixedly connected to the outer wall of the mounting plate 1, the top of the first transmission shaft 3214 is fixedly connected to a worm 3215, the outer wall of the worm 3215 is transmission-connected to a worm wheel 3216, the inner wall of the worm wheel 3216 is fixedly connected to a second transmission shaft 3217, the outer wall of the second transmission shaft 3217 is rotatably connected to a support plate 3218 through a bearing, and the bottom of the support plate 3218 is connected to the The top of the mounting plate 1 is fixedly connected, and the outer wall of the other end of the second transmission shaft 3217 is fixedly connected with a cleaning roller 3219. The bottom of the cleaning roller 3219 is slidably connected to the top of the power device 3210. During the rotation of the output shaft 323, the driving wheel 3211 will drive the driven wheel 3212 to rotate, prompting the first transmission shaft 3214 to rotate, and the worm 3215 to rotate, prompting the worm wheel 3216 and the second transmission shaft 3217 to rotate. During the rotation of the second transmission shaft 3217, the cleaning roller 3219 will be rotated, prompting the cleaning roller 3219 to clean impurities on the surface of the power device 3210, thereby improving the dynamic parameter test effect of the power device 3210.

[0037] Furthermore, a support leg 2 is fixedly connected to the bottom of the mounting plate 1. There are four support legs 2. The four support legs 2 are equal in size. The four support legs 2 are equidistantly fixedly connected to the four corners of the bottom of the mounting plate 1. By setting four support legs 2, the four support legs 2 can provide stable support for the mounting plate 1.

[0038] Furthermore, the bottom of the top plate 312 is slidably connected to the top of the sleeve block 315, and the inner wall of the sleeve block 315 is threadedly connected to the outer wall of the screw rod 314. By setting the top plate 312, the sleeve block 315 and the screw rod 314, the sleeve block 315 is easy to move on the outer wall of the screw rod 314.

[0039] Furthermore, there are four support platforms 329 , which are of equal size and are distributed on the top of the turntable 324 in a circular array along the central axis of the turntable 324 .

[0040] Furthermore, the outer wall of the turntable 324 is matched with the inner wall of the mounting plate 1 , and the top of the turntable 324 is fixedly connected to the top of the support platform 329 .

[0041] Furthermore, the rubber blocks 328 are divided into four groups, two in each group, and the two rubber blocks 328 in each group are symmetrically distributed along the center plane of the power device 3210. By setting the rubber blocks 328, it is convenient to clamp and fix the power device 3210 while preventing the outer wall of the power device 3210 from being pinched.

[0042] In addition, the bottom of the power device 3210 is slidably connected to the top of the support platform 329, and the top of the power device 3210 is slidably connected to the outer wall of the cleaning roller 3219. By setting the cleaning roller 3219, it is convenient to clean the dust and impurities on the surface of the power device 3210.

[0043] A method for testing dynamic parameters of a power device comprises the following steps:

[0044] S1. First, place the power device 3210 on the top of the support platform 329, and clamp and fix the power device 3210 by the rubber block 328;

[0045] S2, then the cylinder 316 is turned on to push the tester 317 downward to perform dynamic parameter testing on the power device 3210, and the forward and reverse motor 313 is turned on to rotate the screw rod 314 to adjust the test position of the tester 317;

[0046] S3, then the turntable 324 is rotated to perform parameter testing on other power devices 3210;

[0047] S4. Finally, the cleaning roller 3219 is used to clean the impurities on the surface of the power device 3210 after the test.

[0048] Working principle: before the power device 3210 needs to be dynamically tested, the power device 3210 needs to be clamped and fixed. At this time, the operator places the power device 3210 on the top of the support table 329, and then rotates the adjustment handle 327 to cause the screw 326 to rotate. During the rotation of the screw 326, the rubber block 328 will move, and the rubber blocks 328 on both sides of the support table 329 will fit with the outer wall of the power device 3210, so as to achieve the clamping and fixing of the power device 3210. When other power devices 3210 need to be tested, the operator turns on the drive motor 322 to cause the output shaft 323 to rotate. During the rotation of the output shaft 323, the turntable 324 will rotate, thereby causing the power device 3210 on the top of the turntable 324 to rotate, so that the tester 317 can test other power devices 3210.

[0049] During the rotation of the output shaft 323, the driving wheel 3211 drives the driven wheel 3212 to rotate, causing the first transmission shaft 3214 to rotate, and the worm 3215 to rotate, causing the worm wheel 3216 and the second transmission shaft 3217 to rotate. During the rotation of the second transmission shaft 3217, the cleaning roller 3219 is driven to rotate, causing the cleaning roller 3219 to clean impurities on the surface of the power device 3210, thereby improving the dynamic parameter test effect of the power device 3210;

[0050] When dynamic testing is required, the operator turns on the cylinder 316, causing the output end of the cylinder 316 to push the tester 317 down, thereby adjusting the test height of the tester 317 and performing dynamic parameter testing through the tester 317. When the test position of the tester 317 needs to be adjusted, the operator turns on the forward and reverse motor 313 to cause the screw rod 314 to rotate. During the rotation of the screw rod 314, the socket block 315 will move laterally along the outer wall of the screw rod 314, thereby realizing the movement of the tester 317, thereby facilitating the adjustment of the position of the tester 317 for dynamic parameter testing.

[0051] The above description is only an illustrative specific implementation mode of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any technician in the field without departing from the concept and principle of the present invention should fall within the scope of protection of the present invention. It should also be noted that the various components of the present invention are not limited to the above-mentioned overall application. The various technical features described in the specification of the present invention can be selected one by one or multiple ones can be selected and used in combination according to actual needs. Therefore, the present invention should naturally cover other combinations and specific applications related to this case.

Claims

1. A power device dynamic parameter test device, comprising a mounting plate (1), and a test assembly (31) arranged above the mounting plate (1), characterized in that: The test assembly (31) comprises a vertical plate (311) fixedly connected to the top of the mounting plate (1); the top of the vertical plate (311) is fixedly connected to a top plate (312); the side wall of the vertical plate (311) is fixedly connected to a forward and reverse motor (313); the output end of the forward and reverse motor (313) is fixedly connected to a screw rod (314); the screw rod (314) movably penetrates the outer wall of the top plate (312) and extends to the inside of the top plate (312); the other end of the screw rod (314) is fixedly connected to the side wall of another top plate (312); the outer wall of the screw rod (314) is threadedly connected to a sleeve block (315); the top of the sleeve block (315) is slidably connected to the bottom of the top plate (312); the bottom of the side of the sleeve block (315) is fixedly connected to a cylinder (316); and the output end of the cylinder (316) is fixedly connected to a tester (317).

2. A power device dynamic parameter testing device according to claim 1, characterized in that: An adjustment component (32) is provided at the bottom of the mounting plate (1), and the adjustment component (32) comprises a support frame (321) fixedly connected to the bottom of the mounting plate (1), a driving motor (322) is fixedly connected to the inner wall of the bottom of the support frame (321), an output end of the driving motor (322) is fixedly connected to an output shaft (323), a rotating disk (324) is fixedly connected to the top of the output shaft (323), an outer wall of the rotating disk (324) is slidably connected to the inner wall of the mounting plate (1), and a side plate (325) is fixedly connected to the top of the rotating disk (324). The inner wall of the side plate (325) is threadedly connected to a screw rod (326), the outer wall of one end of the screw rod (326) is fixedly connected to an adjustment handle (327), the other end of the screw rod (326) is rotatably connected to a rubber block (328), the bottom of the rubber block (328) is slidably connected to the top of the turntable (324), the top of the turntable (324) is fixedly connected to a support platform (329), the top of the support platform (329) is slidably connected to a power device (3210), and the outer wall of the power device (3210) is slidably connected to the side wall of the rubber block (328).

3. A power device dynamic parameter testing device according to claim 2, characterized in that: The adjustment assembly (32) further comprises a driving wheel (3211) fixedly connected to the outer wall of the output shaft (323); a driven wheel (3212) is meshed with the side wall of the driving wheel (3211); a first transmission shaft (3214) is fixedly connected to the inner wall of the driven wheel (3212); a cross block (3213) is rotatably connected to the middle outer wall of the first transmission shaft (3214) via a bearing; a side wall of the cross block (3213) is fixedly connected to the outer wall of the mounting plate (1); a worm (3215) is fixedly connected to the top of the first transmission shaft (3214); ), the outer wall of the worm (3215) is transmission-connected to a worm wheel (3216), the inner wall of the worm wheel (3216) is fixedly connected to a second transmission shaft (3217), the outer wall of the second transmission shaft (3217) is rotationally connected to a support plate (3218) via a bearing, the bottom of the support plate (3218) is fixedly connected to the top of the mounting plate (1), the outer wall of the other end of the second transmission shaft (3217) is fixedly connected to a cleaning roller (3219), and the bottom of the cleaning roller (3219) is slidably connected to the top of the power device (3210).

4. A power device dynamic parameter testing device according to claim 1, characterized in that: The bottom of the mounting plate (1) is fixedly connected with a support leg (2), the number of the support legs (2) is four, the four support legs (2) are equal in size, and the four support legs (2) are equidistantly fixedly connected to the four corners of the bottom of the mounting plate (1).

5. A power device dynamic parameter testing device according to claim 1, characterized in that: The bottom of the top plate (312) is slidably connected to the top of the sleeve block (315), and the inner wall of the sleeve block (315) is threadedly connected to the outer wall of the screw rod (314).

6. A power device dynamic parameter testing device according to claim 2, characterized in that: There are four support platforms (329), the four support platforms (329) are of equal size, and the four support platforms (329) are distributed on the top of the turntable (324) in a circular array along the central axis of the turntable (324).

7. A power device dynamic parameter testing device according to claim 2, characterized in that: The outer wall of the turntable (324) is matched with the inner wall of the mounting plate (1), and the top of the turntable (324) is fixedly connected to the top of the support platform (329).

8. A power device dynamic parameter testing device according to claim 2, characterized in that: The rubber blocks (328) are divided into four groups, with two rubber blocks in each group. The two rubber blocks (328) in each group are symmetrically distributed along the center plane of the power device (3210).

9. A power device dynamic parameter testing device according to claim 2, characterized in that: The bottom of the power device (3210) is slidably connected to the top of the support platform (329), and the top of the power device (3210) is slidably connected to the outer wall of the cleaning roller (3219).

10. A method for testing dynamic parameters of a power device, applicable to a device for testing dynamic parameters of a power device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, place the power device 3210 on the top of the support platform 329, and clamp and fix the power device 3210 by the rubber block 328; S2, then the cylinder 316 is turned on to push the tester 317 downward to perform dynamic parameter testing on the power device 3210, and the forward and reverse motor 313 is turned on to rotate the screw rod 314 to adjust the test position of the tester 317; S3, then the turntable 324 is rotated to perform parameter testing on other power devices 3210; S4. Finally, the cleaning roller 3219 is used to clean the impurities on the surface of the power device 3210 after the test.

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