Dynamic test board and test device

Abstract

The utility model provides a dynamic test bench and a test device, comprising a reference platform, a rotating platform, a plurality of heating plates and a lifting assembly, the rotating platform is rotatably arranged on the reference platform; the plurality of heating plates are independent of one another and are movably arranged on the rotating platform, a waiting position and a testing position which are close to or far away from the rotating platform are arranged on the moving stroke of the heating plates, and the rotating platform is used for rotating to enable the plurality of heating plates to sequentially rotate to a preset testing station; the lifting assembly is arranged at the preset testing station and used for driving the heating plate located at the preset testing station to be switched between the waiting position and the testing position. According to the utility model, the technical problems that the test precision is influenced and the test time is prolonged due to beat mismatch of the traditional dynamic test bench are solved.

Description

Technical Field

[0001] This utility model relates to the field of power device testing technology, and in particular to a dynamic test bench and test device. Background Technology

[0002] Dynamic testing of power devices is the final step in power device manufacturing, used to ensure that the dynamic parameters of the power devices meet design requirements and that the products are qualified. The gate turn-on amplitude of power devices such as IGBTs / MOSSFETs is affected by the junction temperature. Therefore, when testing their dynamic parameters, it is necessary to simulate and reproduce their actual operating temperature. Thus, they must be heated to the operating temperature before dynamic testing.

[0003] However, the time difference between the heating process and the dynamic testing process results in a waiting period for the heated products. This time mismatch leads to two key technical defects: first, the product experiences temperature drift due to unsteady heat dissipation during the waiting period, causing the actual test temperature to deviate from the rated operating temperature threshold, affecting the accuracy of dynamic parameter testing; second, the mismatch between processes reduces equipment utilization, prolongs the testing cycle, and exacerbates production energy consumption and time costs. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a dynamic test bench and test device to solve the technical problem that the traditional dynamic test bench affects the test accuracy and prolongs the test time due to the mismatch of the cycle time.

[0005] This utility model provides a dynamic testing platform, including:

[0006] Benchmark platform;

[0007] A rotating platform, rotatably mounted on the reference platform;

[0008] Multiple heating plates are independently and movably mounted on the rotating platform. They have waiting positions and test positions that are close to or far from the rotating platform during their travel. The rotating platform is used to rotate so that the multiple heating plates rotate sequentially to a preset test position.

[0009] A lifting assembly is located at the preset test station and is used to drive the heating plate located at the preset test station to switch between a waiting position and a test position.

[0010] Among them, the heating plate located at the preset test station is defined as the first heating plate, and the rest are the second heating plate group. The first heating plate has a test waiting time, and based on the test waiting time, at least a part of the second heating plate group is in a continuous heating state, and at least a part of the second heating plate group is used to allocate the total heating time.

[0011] Furthermore, the dynamic testing platform also includes a preset material changing station. The preset material changing station and the preset testing station are arranged sequentially along the rotation path of the rotating platform. The rotating platform is used to rotate and transfer the heating plate located at the preset testing station to the preset material changing station.

[0012] Furthermore, the second heating plate assembly includes at least three heating plates.

[0013] Furthermore, the rotating platform has multiple installation areas, which are spaced apart along the rotation path of the rotating platform and correspond one-to-one with multiple heating plates.

[0014] Furthermore, the installation area is provided with several guide rods, which extend along the active stroke direction of the heating plate and are used to pass through the corresponding heating plate with gaps.

[0015] Furthermore, the lifting assembly includes a lifting platform and a cylinder connected to each other. The lifting platform is located on the reference platform, and its moving direction is the same as the moving stroke direction of the heating plate. The two can be detachably connected.

[0016] Furthermore, the rotating platform is provided with multiple support plates, and the multiple support plates are connected to multiple heating plates one by one.

[0017] Furthermore, a heat insulation plate is provided between the heating plate and the support plate.

[0018] Furthermore, the heating plate can be detachably provided with a carrier plate, and the carrier plate has a plurality of fixed positions.

[0019] This utility model also provides a testing device, including: the dynamic testing platform described above.

[0020] Compared with existing technologies, this utility model has the following advantages: By utilizing the rotation of the rotating platform on the reference platform, multiple heating plates are constructed into a loop. In this loop, the heating plate at the preset test station can be driven by the lifting component for dynamic testing in conjunction with external test components. The heating plates at non-preset test stations can be used for product loading, unloading, and heating, thereby improving the continuity of operations. Furthermore, by having the second heating plate group perform the preheating process in parallel, the total heating time of the same product is discretely distributed to at least some independent heating units, so that the effective heating time of a single product is precisely matched with the dynamic test cycle, keeping the process rhythm the same. This eliminates the waiting window between processes, improves equipment utilization, shortens test time, and reduces costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the dynamic testing platform in one embodiment of the present invention;

[0022] Figure 2 This is a structural schematic diagram of the dynamic testing platform from another angle in one embodiment of the present invention;

[0023] Figure 3 This is an exploded view of the dynamic test platform in one embodiment of the present invention, with part of the heating plate omitted;

[0024] Figure 4 This is a schematic diagram of the heating plate in one embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the heating plate and the carrier plate in one embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the testing device in one embodiment of the present invention.

[0027] Explanation of icon numbers:

[0028] 100. Dynamic test bench; 1. Reference platform; 2. Rotating platform; 201. Installation area; 3. Heating plate; 4. Lifting platform; 5. Cylinder; 6. Preset test station; 7. Preset material change station; 8. Guide rod; 9. Support plate; 10. Heat insulation plate; 11. Carrier tray.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0031] In the embodiments of this utility model, such as Figures 1-3 As shown, the dynamic test bench 100 includes: a reference platform 1, a rotating platform 2, multiple heating plates 3, and a lifting assembly; the rotating platform 2 is rotatably mounted on the reference platform 1; the multiple heating plates 3 are independently and movably mounted on the rotating platform 2, and have waiting positions and test positions that are close to or far from the rotating platform 2 respectively in their travel stroke; the rotating platform 2 is used to rotate so that the multiple heating plates 3 rotate sequentially to a preset test station 6; the lifting assembly is located at the preset test station 6 and is used to drive the heating plates 3 located at the preset test station 6 to switch between the waiting position and the test position;

[0032] Among them, the heating plate 3 located at the preset test station 6 is defined as the first heating plate, and the rest are the second heating plate group. The first heating plate has a test waiting time, and based on the test waiting time, at least a part of the second heating plate group is in a continuous heating state, and at least a part of the second heating plate group is used to allocate the total heating time.

[0033] Specifically, in this embodiment of the present invention, the reference platform 1 and the rotating platform 2 are stacked, and the rotating platform 2 can rotate relative to the reference platform 1, so that the rotating platform 2 has a rotation path.

[0034] In this embodiment of the invention, multiple heating plates 3 are spaced apart along the rotation path of the rotating platform 2, and are used to rotate with the rotating platform 2, so that the multiple heating plates 3 rotate one by one to the preset test station 6. In actual operation, the heating plates 3 can not only heat the products on them to reach the rated operating temperature, but also serve as product carriers, forming a loop in the intermittent rotation of the rotating platform 2, so that multiple heating plates 3 can be configured to work simultaneously at multiple stations. On the other hand, in order to perform dynamic testing after matching with external testing components (not shown), the multiple heating plates 3 are set independently of each other, and each heating plate 3 can move relative to the rotating platform 2, so that the heating plate 3 has a waiting position set close to the rotating platform 2 and a test position set away from the rotating platform 2. In addition, a lifting component is set at the preset test position. When any heating plate 3 is rotated to the preset test position by the rotating platform 2, the lifting component can lift the heating plate 3 at the current position to the test component to realize dynamic testing of the product on the current heating plate 3. After the test is completed, the lifting component transfers the heating plate 3 from the test position to the waiting position, and finally the rotating platform 2 rotates again and transports it to the next position.

[0035] Furthermore, the heating plate 3 located at the preset test station 6 is defined as the first heating plate, and the remaining heating plates 3 at non-preset test stations 6 are defined as the second heating plate group. When the first heating plate is in the test state, it should have a test waiting time during which the rotating platform 2 is stationary, and the second heating plate group is also stationary. In order to adapt to the cycle of the test process, at least some of the products on the second heating plate group are in a continuous heating state.

[0036] For example, in Example 1: if some products on the second heating plate group are under continuous heating, the remaining second heating plate group can be used for loading and / or unloading, in which case the products during the loading and unloading process are not heated. That is, when the first heating plate is in the testing state, a portion of the second heating plate group is in the loading and unloading state, and the product temperature at that location is room temperature or the cooling temperature after testing, while the other portion of the second heating plate group is in the continuous heating state.

[0037] Example 2: All products on the second heating plate group are in a continuous heating state. Similar to Example 1, one of the second heating plate groups is configured for loading and unloading. When the rotating platform 2 is stationary, the first heating plate is in a testing state, one of the second heating plate groups is in the loading / unloading state, and the rest are in a continuous heating state. Simultaneously, due to potential time differences between the testing and loading / unloading processes, if a product is placed but the testing process is not yet complete, the product can be heated at this time, and the rotating platform 2 can be rotated only after the testing process is completed. That is, when the first heating plate is in the testing state, all products on the second heating plate group are in a state of continuous heating.

[0038] Furthermore, in both Example 1 and Example 2, at least some of the second heating plate groups are in a continuous heating state. Therefore, after configuring the second heating plate group into multiple heating plates 3, the non-preset test station 6 will continue to maintain a heating state to achieve dynamic heating of the product. That is, by executing the heating process in parallel by the second heating plate group, the total heating time is discretely distributed to multiple independent heating plates 3, so that the effective heating time of a single product is accurately matched with the dynamic test time, and the product has a rated operating temperature before reaching the preset test station 6. While responding to the process cycle, it can ensure that the heating temperature is within the rated operating temperature range to ensure the accuracy of the measurement.

[0039] This embodiment constructs a temperature-increasing closed-loop system based on the distributed layout of multiple heating plates 3 on the rotating platform 2 and the coordinated operation of the lifting components. A second group of heating plates continuously maintains heating at non-preset test stations 6, forming a dynamic heating system. Each heating plate 3 completes product heating during rotation switching. Combined with the lifting components, each heating plate 3 switches between waiting and testing positions, adapting the product heating cycle to its testing cycle, ensuring that the dynamic parameter testing temperature conditions are always within the rated operating temperature. Of course, adjusting the radius of the rotating platform 2 and the number of heating plates 3 allows for linear expansion according to production capacity requirements.

[0040] like Figure 1As shown, in one embodiment, the dynamic testing platform 100 further includes a preset material changing station 7. The preset material changing station 7 and the preset testing station 6 are sequentially arranged along the rotation path of the rotating platform 2. The rotating platform 2 is used to rotate and transfer the heating plate 3 located at the preset testing station 6 to the preset material changing station 7. Specifically, in order to achieve continuous operation, this embodiment sets a preset material changing station 7 so that after the test is completed, the rotation of the rotating platform 2 can be used to rotate the heating plate 3 located at the preset testing station 6 to the preset material changing station 7, so as to change the product at the heating plate 3. Then, according to the rotation of the rotating platform 2, it enters a cycle loop for heating-testing-unloading operations. Thus, the rotation path of the rotating platform 2 is a loop. If the preset material changing station 7 is defined as the starting point of its rotation path, then the preset testing station 6 is the ending point of the rotation path. The starting point and the ending point are arranged adjacent to each other to achieve continuous operation using the rotating platform 2. Of course, between the preset material changing station 7 and the preset testing station 6 are multiple preset heating stations. These multiple preset heating stations are also spaced along the rotation path of the rotating platform 2 so that the heating plate 3 has different heating temperatures at different preset heating stations, thus gradually heating the product temperature from room temperature to the rated operating temperature.

[0041] Furthermore, such as Figure 1 As shown, in one embodiment, the second heating plate group includes at least three heating plates 3. Specifically, in order to respond to the process cycle and reasonably allocate the total heating time, this embodiment defines the second heating plate group as three heating plates 3. One of the three heating plates 3 can be used for loading and unloading, and the remaining two heating plates 3 are used for heating the product, so that the temperature of the product is different at each heating plate 3, so as to reasonably allocate the total heating time of the same product, thereby responding to the testing process cycle.

[0042] like Figure 3 As shown, in one embodiment, the rotating platform 2 has multiple mounting areas 201, which are spaced apart along the rotation path of the rotating platform 2 and correspond one-to-one with multiple heating plates 3. Specifically, in order to install each heating plate 3 on the rotating platform 2, this embodiment sets multiple mounting areas 201 on the rotating platform 2, which are also equidistantly spaced along the rotation path of the rotating platform 2, so that the heating plates 3 can be installed in the corresponding mounting areas 201. In this embodiment, since there are four heating plates 3 (i.e., the position of each heating plate 3 can be switched every 90° of rotation of the rotating platform 2), a grid-shaped mounting bracket is fixed on the rotating platform 2, and the four mounting areas 201 formed by the mounting bracket are used to install the four heating plates 3.

[0043] Furthermore, such as Figure 3As shown, in one embodiment, the mounting area 201 is provided with a plurality of guide rods 8, which extend along the active stroke direction of the heating plate 3 and are used to pass through the corresponding heating plate 3. Specifically, in order to enable the heating plate 3 to switch smoothly and stably between the waiting position and the test position, this embodiment provides a guide rod 8 on each opposite side of each mounting area 201. The guide rod 8 extends along the active stroke direction of the heating plate 3, and the heating plate 3 has through holes through which the guide rod 8 can pass. Thus, the guiding function of the guide rod 8 can be used to constrain the movement direction of the heating plate 3, so that it can only switch between the waiting position and the test position, while also ensuring the stability of its movement. Of course, in order to prevent the heating plate 3 from detaching from the guide rod 8, the length of the guide rod 8 needs to be greater than the active stroke length of the heating plate 3; or a stop is provided at the end of the guide rod 8 so that the heating plate 3 abuts against the stop when it is in the test position.

[0044] like Figure 2 , Figure 3 As shown, in one embodiment, the lifting assembly includes a lifting platform 4 and a cylinder 5 connected to each other. The lifting platform 4 is located on the reference platform 1, and its moving direction is the same as the moving stroke direction of the heating plate 3. The two can be detachably connected. Specifically, in order to switch the heating plate 3 in the preset test station 6 between the waiting position and the test position, the lifting assembly in this embodiment includes a lifting platform 4 and a cylinder 5. The telescopic end of the cylinder 5 is connected to the lifting platform 4, so that the cylinder 5 can use the lifting platform 4 to lift or release the heating plate 3 during operation. That is, when lifting the heating plate 3, the heating plate 3 and the product on it can be pushed to the test assembly for dynamic testing; conversely, when releasing the heating plate 3, the heating plate 3 and the product on it can be lowered with the lifting platform 4 to detach from the test assembly and place it in the waiting position. Finally, the heating plate 3 can be taken away from the preset test station 6 by the rotation of the rotating platform 2. Of course, in order to ensure that the smooth rotation of the rotating platform 2 is not limited by the installation restrictions of the lifting components, the aforementioned mounting bracket is spaced apart from the base platform 1 to leave room for the installation of the lifting platform 4.

[0045] like Figure 4 , Figure 5 As shown, in one embodiment, the rotating platform 2 is provided with multiple support plates 9, and the multiple support plates 9 are connected one-to-one with multiple heating plates 3. Specifically, in order to improve the hardness of each heating plate 3 and enable it to support the product, this embodiment provides a support plate 9 at each rotating area of ​​the rotating platform 2, placing the support plate 9 below the heating plate 3 to support the heating plate 3. Preferably, in order to insulate the heat generated by the heating plate 3, a heat insulation plate 10 is provided between the heating plate 3 and the support plate 9.

[0046] like Figure 1 , Figure 4 , Figure 5 As shown, in one embodiment, the heating plate 3 is detachably provided with a carrier tray 11, which has several fixing positions. Specifically, in order to fix the product to the heating plate 3 for corresponding operations, this embodiment provides a carrier tray 11 at the heating plate 3. The carrier tray 11 and the heating plate 3 are connected in a detachable manner, which facilitates loading and unloading and also makes it easy to select a suitable carrier tray 11 for different products. Simultaneously, to position the carrier tray 11 at the heating plate 3, one of the carrier tray 11 and the heating plate 3 is provided with multiple positioning protrusions, and the other is provided with multiple positioning through holes. The multiple positioning protrusions are correspondingly inserted into the multiple positioning through holes to fix the carrier tray 11 to the heating plate 3. Furthermore, to improve testing efficiency, the carrier tray 11 has multiple fixing positions for fixing multiple products, so that multiple products can be carried on the same carrier tray 11, allowing for simultaneous heating and testing of multiple products. Similarly, one of the fixed position and the product is provided with multiple positioning protrusions, and the other is provided with multiple positioning through holes. The positioning protrusions and positioning through holes use the same fixing method to fix the product at the corresponding fixed position, so as to avoid the product from shifting during the rotation of the rotating platform 2.

[0047] like Figure 6 As shown, this embodiment also provides a testing device, including the dynamic testing platform 100 described above. The specific structure of the dynamic testing platform 100 is as described in the above embodiment. Since this testing device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dynamic test bench, characterized in that, include: Benchmark platform; A rotating platform, rotatably mounted on the reference platform; Multiple heating plates are independently and movably mounted on the rotating platform. They have waiting positions and test positions that are close to or far from the rotating platform during their travel. The rotating platform is used to rotate so that the multiple heating plates rotate sequentially to a preset test position. A lifting assembly is located at the preset test station and is used to drive the heating plate located at the preset test station to switch between a waiting position and a test position. Among them, the heating plate located at the preset test station is defined as the first heating plate, and the rest are the second heating plate group. The first heating plate has a test waiting time, and based on the test waiting time, at least a part of the second heating plate group is in a continuous heating state, and at least a part of the second heating plate group is used to allocate the total heating time.

2. The dynamic test bench as described in claim 1, characterized in that, The dynamic testing platform also includes a preset material changing station. The preset material changing station and the preset testing station are arranged sequentially along the rotation path of the rotating platform. The rotating platform is used to rotate and transfer the heating plate located at the preset testing station to the preset material changing station.

3. A dynamic testing platform as described in claim 2, characterized in that, The second heating plate group includes at least three heating plates.

4. A dynamic test bench as described in claim 1, characterized in that, The rotating platform has multiple installation areas, which are spaced apart along the rotation path of the rotating platform and correspond one-to-one with multiple heating plates.

5. A dynamic test bench as described in claim 4, characterized in that, The installation area is provided with several guide rods, which extend along the active stroke direction of the heating plate and are used to pass through the corresponding heating plate with gaps.

6. A dynamic test bench as described in any one of claims 1-5, characterized in that, The lifting assembly includes a lifting platform and a cylinder connected to each other. The lifting platform is located on the reference platform, and its moving direction is the same as the moving stroke direction of the heating plate. The two can be detachably connected.

7. A dynamic testing platform as described in any one of claims 1-5, characterized in that, The rotating platform is provided with multiple support plates, and each of the multiple support plates is connected to a multiple heating plate in a corresponding manner.

8. A dynamic test bench as described in claim 7, characterized in that, A heat insulation plate is provided between the heating plate and the support plate.

9. A dynamic test bench as described in any one of claims 1-5, characterized in that, The heating plate is detachably provided with a carrier plate, and the carrier plate has several fixed positions.

10. A testing apparatus, characterized in that, include: The dynamic test bench as described in any one of claims 1-9.

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