Power device no-load aging test before the placement of the detection device and test system

Abstract

A kind of power device idle aging test before placement posture detection device and test system, including support structure, vacuum generating mechanism, with vacuum generating mechanism connection connecting pipeline and with connecting pipeline connection pressure sensor, support structure includes: for positioning support base plate of support base plate;Detection part is fixed to the upper surface of support base plate, the upper end surface of detection part forms the support plane corresponding with the lower plane of the substrate of device, support plane is contacted with the substrate surface of device and then vertically positioned to device, suction port is equipped on detection part, one end of suction port penetrates support plane, another end of suction port is connected with connecting pipeline;When starting vacuum generating mechanism, the posture of device is normal when the detection pressure of pressure sensor is in normal pressure range, the posture of device is abnormal when the pressure of pressure sensor is higher than normal pressure range, to reduce the failure rate in testing process, improve the efficiency of test production process.

Description

Technical Field

[0001] This utility model relates to the field of power device testing technology, and in particular to a device and testing system for detecting the placement posture of power devices before reactive power aging testing. Background Technology

[0002] Power devices typically require reactive power aging tests to assess the performance stability and reliability of power electronic equipment during long-term operation, helping researchers identify potential faults. Common power devices include power semiconductor devices, specifically IGBTs (Insulated Gate Bipolar Transistors).

[0003] In the power device testing production line, a special tray is required to place the device. When the device is placed on the tray in a skewed manner, it will increase the possibility of the device being skewed at the subsequent testing station. This will further lead to problems such as device pin interference with the related mechanisms of the testing equipment, device damage, false contact of probe busbars and other issues that cause errors. It will also increase the time cost of equipment maintenance and affect the normal operation of the device testing production line. Utility Model Content

[0004] To address the shortcomings of existing production technologies, the applicant provides a device and system for detecting the placement posture of power devices before reactive power aging tests. This device detects whether the placement posture of the devices on the carrier is normal before reactive power aging tests, thereby reducing the failure rate during testing and improving the efficiency of the testing and production process.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A device for detecting the placement posture of power devices before reactive power aging testing includes a support structure, a vacuum generating mechanism, a connecting pipe connected to the vacuum generating mechanism, and a pressure sensor connected to the connecting pipe. The support structure includes:

[0007] A support substrate is used to position a support tray, the tray is used to position a support device, and the tray has a through hole in the middle that penetrates the upper and lower surfaces of the tray.

[0008] The detection unit is fixed on the upper surface of the support substrate. The upper end surface of the detection unit forms a support plane corresponding to the lower plane of the substrate of the device. The support plane contacts the substrate surface of the device to vertically position the device.

[0009] A suction port is provided on the detection unit, one end of the suction port passes through the support plane, and the other end of the suction port is connected to the connecting pipe;

[0010] When the carrier disk is positioned on the support substrate, the support plane is located inside the perforation and in contact with the lower plane of the substrate of the device. When the vacuum generating mechanism is activated, the device is in normal posture when the pressure detected by the pressure sensor is within the normal pressure range, and the device is in abnormal posture when the pressure of the pressure sensor is higher than the normal pressure range.

[0011] As a further improvement to the above technical solution:

[0012] The detection section is a block-shaped structure protruding from the upper surface of the support substrate. There are multiple detection sections, and more than or equal to three. The multiple detection sections are distributed circumferentially along the inner wall surface of the perforation. The support surfaces of the multiple detection sections are all coplanar. The positions of the three detection sections form a triangle. The suction port is a cylindrical hole. One end of the suction port penetrates the support plane, and the other end of the suction port is connected to the connecting pipe.

[0013] The connecting pipe includes an internal channel located inside the support substrate, and the internal channel is connected to the suction port;

[0014] It also includes a first connecting channel located inside the support substrate, one end of the first connecting channel communicating with the internal channel, and the other end of the first connecting channel penetrating the lower surface of the support substrate and connecting to the suction port of the vacuum generating mechanism.

[0015] The support structure further includes a support base, the support substrate is fixedly mounted on the support base, and the vacuum generating mechanism is fixedly mounted on the support base.

[0016] The support base is a box-type structure. The side plate of the box-type structure supports and connects to the support base plate. The vacuum generating mechanism is located inside the box-type structure. A second connecting channel is provided on the side plate. One end of the second connecting channel is located on the end face of the side plate and is sealed and connected to the first connecting channel. The other end of the second connecting channel is located on the side of the side plate and is equipped with a pipe connector. The pipe connector is connected to the suction port of the vacuum generating mechanism through an air pipe.

[0017] The end face of the side plate is provided with a first groove, and a first sealing ring is installed in the first groove. The first sealing ring seals the second connecting channel with the first connecting channel.

[0018] The internal channel includes a first through hole and a second through hole, both of which are blocked at both ends. The first through hole and the second through hole are parallel and located on both sides of the perforation, respectively. It also includes a first blind hole with its opening blocked. The first blind hole connects the first through hole and the second through hole. The first connecting channel includes a second blind hole that communicates with the first blind hole. The opening of the second blind hole is located on the lower surface of the support substrate and is sealed to the second connecting channel by a first sealing ring.

[0019] Among them, some of the suction ports are connected to the first through hole, and the remaining parts are connected to the second through hole.

[0020] The supporting plane of the detection unit is provided with a second groove, and a second sealing ring is installed in the second groove. The suction port end is located in the inner ring of the second sealing ring, and the second sealing ring corresponds to the lower plane of the substrate of the device.

[0021] A first positioning pin is provided on the support plane or the carrier plate, and a first positioning hole corresponding to the first positioning pin is provided on the substrate of the device for positioning the device in the horizontal direction.

[0022] A test system for reactive power aging testing of power devices includes a placement posture detection device for power devices before reactive power aging testing as described above.

[0023] The beneficial effects of this utility model are as follows:

[0024] This utility model has a compact and reasonable structure and is easy to operate. It uses a support substrate to position the carrier plate of the device at a fixed station. The support substrate is equipped with a detection part and a suction port is provided on the support plane where the detection part contacts the device surface. The device's placement posture is judged by evacuating a vacuum at the suction port to determine whether the device is in good contact with the support plane. This reduces the failure rate during the testing process and improves the efficiency of the testing and production process.

[0025] This utility model also has the following advantages:

[0026] (1) Multiple block-shaped detection units are set up using a multi-point stable support method to reduce the power of the vacuum system and interference from other factors, thereby improving the detection sensitivity.

[0027] (2) The connecting pipes are placed inside the support base plate to reduce the connection of external pipe joints and pipes, making the attitude detection device smaller and simpler in structure.

[0028] (3) A box-type support base is set to accommodate the vacuum generating mechanism, so that the vacuum generating mechanism is not exposed and the appearance structure of the attitude detection device is simpler. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the detection device of this utility model.

[0030] Figure 2 This is an exploded view of the detection device of this utility model.

[0031] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle.

[0032] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0033] Figure 5 for Figure 3 Enlarged view of a section at point C.

[0034] Figure 6 for Figure 3 Enlarged view of a section at point D.

[0035] Figure 7 This is a schematic diagram of the assembly structure of the device, carrier disk and support substrate of this utility model.

[0036] Figure 8 This is a schematic diagram of the assembly structure of the device, carrier disk and support substrate of this utility model (bottom view).

[0037] in:

[0038] 1. Component; 11. First positioning hole;

[0039] 2. Carrier tray; 21. Perforation; 22. Second positioning hole;

[0040] 3. Supporting structure;

[0041] 31. Detection section; 310. Support plane; 311. Suction port; 313. First positioning pin; 312. Second sealing ring;

[0042] 32. Internal channel; 321. First through hole; 322. First blind hole; 323. Second through hole;

[0043] 33. Supporting substrate; 331. Second positioning pin;

[0044] 34. Second connecting channel; 343. First sealing ring;

[0045] 35. Pipe fittings;

[0046] 36. First connection channel;

[0047] 37. Support base; 371. Side plate;

[0048] 4. Vacuum generating mechanism. Detailed Implementation

[0049] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0050] Example 1:

[0051] like Figures 1-8 As shown, the placement posture detection device for power devices before reactive power aging test in this embodiment includes a support structure 3, a vacuum generating mechanism 4, a connecting pipe connected to the vacuum generating mechanism 4, and a pressure sensor connected to the connecting pipe. The support structure 3 includes a support base plate 33, a detection part 31, and a suction port 311.

[0052] The support substrate 33 is used to position the support tray 2. The tray 2 is used to position the support device 1. The tray 2 has a through hole 21 in the middle that penetrates the upper and lower surfaces of the tray 2.

[0053] The detection unit 31 is fixed on the upper surface of the support substrate 33. The upper end surface of the detection unit 31 forms a support plane 310 corresponding to the lower plane of the substrate of the device 1. The support plane 310 contacts the substrate surface of the device 1 to vertically position the device 1.

[0054] A suction port 311 is provided on the detection unit 31. One end of the suction port 311 passes through the support plane 310, and the other end of the suction port 311 is connected to the connecting pipe.

[0055] When the carrier disk 2 is positioned on the support substrate 33, the support plane 310 is located inside the perforation 21 and contacts the lower plane of the substrate of the device 1. When the vacuum generating mechanism 4 is activated, the device 1 is in normal posture when the pressure detected by the pressure sensor is within the normal pressure range, and the device 1 is in abnormal posture when the pressure of the pressure sensor is higher than the normal pressure range.

[0056] Specifically, the support substrate 33 can be fixedly set at the loading station to ensure that the device 1 is in the correct posture after loading. Otherwise, the test system will issue an alarm. The pressure sensor is a vacuum gauge, which is connected to the control system signal of the test system. The value of the normal pressure range depends on the specific requirements. When the pressure measured by the pressure sensor is high, it means that the suction port 311 is not completely blocked, that is, the support plane 310 is not in contact with the detection part 31. The vacuum generating mechanism 4 is a vacuum generator or a vacuum pump.

[0057] A first positioning pin 313 is provided on the support plane 310 or on the carrier plate 2, and a first positioning hole 11 corresponding to the first positioning pin 313 is provided on the substrate of the device 1 for positioning the device 1 in the horizontal direction.

[0058] In addition, the support substrate 33 is provided with a second positioning pin 331, and the carrier 2 is provided with a second positioning hole 22 corresponding to the second positioning pin 331 for positioning the carrier 2.

[0059] The carrier plate 2 of the device 1 is positioned by setting a support substrate 33 at a fixed station. The support substrate 33 is provided with a detection part 31. A suction port 311 is provided on the support plane 310 where the detection part 31 contacts the device 1. The device 1 is judged to be in good contact with the support plane 310 by evacuating a vacuum at the suction port 311. This reduces the failure rate during the test process and improves the efficiency of the test production process.

[0060] The pressure sensor of the attitude detection device in this embodiment has a certain detection range and is more sensitive than detection methods such as microswitches and switch needles. It can detect some minor tilts and improve the sensitivity and accuracy of attitude detection. In addition, the microswitches and switch needles have spring mechanisms inside, and the replacement cost of microswitches and switch needles is relatively high.

[0061] In this embodiment, the detection part 31 is a block structure protruding from the upper surface of the support substrate 33. There are multiple detection parts 31, and more than or equal to three. The multiple detection parts 31 are distributed circumferentially along the inner wall surface of the through hole 21. The support surfaces of the multiple detection parts 31 are all coplanar. The positions of the three detection parts 31 form a triangle. The suction port 311 is a cylindrical hole. One end of the suction port 311 penetrates the support plane 310, and the other end of the suction port 311 is connected to the connecting pipe.

[0062] Specifically, such as Figure 3 As shown, there are four detection units 31, which are integrally formed with the support substrate 33. The detection units 31 are located at the vertices of the same rectangle, which corresponds to the lower plane of the outer periphery of the bottom of the substrate of the device 1.

[0063] Multiple block-shaped detection units 31 are set up using a multi-point stable support method to reduce the power of the vacuum system and interference from other factors, thereby improving the detection sensitivity.

[0064] Example 2:

[0065] Based on Example 1, the placement posture detection device for power devices before reactive power aging test in this example has a detailed design of the connecting pipeline, making the posture detection device miniaturized and simple in structure.

[0066] like Figure 2 , Figure 3 As shown, the connecting pipe includes an internal channel 32 located inside the support substrate 33, and the internal channel 32 is connected to the suction port 311;

[0067] It also includes a first connection channel 36 located inside the support substrate 33. One end of the first connection channel 36 is connected to the internal channel 32, and the other end of the first connection channel 36 passes through the lower surface of the support substrate 33 and is connected to the suction port 311 of the vacuum generating mechanism 4.

[0068] By placing the connecting pipes inside the support base plate 33, the number of external pipe joints and pipe connections is reduced, making the attitude detection device smaller and simpler in structure.

[0069] Furthermore, the support structure 3 also includes a support base 37, on which the support substrate 33 is fixedly mounted, and on which the vacuum generating mechanism 4 is fixedly mounted.

[0070] The support base 37 is a box-type structure. The side plate 371 of the box-type structure supports and connects to the support base plate 33. The vacuum generating mechanism 4 is located inside the box-type structure. The side plate 371 is provided with a second connecting channel 34. One end of the second connecting channel 34 is located on the end face of the side plate 371 and is sealed and connected to the first connecting channel 36. The other end of the second connecting channel 34 is located on the side of the side plate 371 and is equipped with a pipe connector 35. The pipe connector 35 is connected to the suction port 311 of the vacuum generating mechanism 4 through an air pipe.

[0071] The second connecting channel 34 is L-shaped and is machined by two intersecting holes.

[0072] A box-type support base 37 is provided to house the vacuum generating mechanism 4, so that the vacuum generating mechanism 4 is not exposed, and the appearance structure of the attitude detection device is simpler.

[0073] like Figure 5 As shown, the end face of the side plate 371 is provided with a first groove, and a first sealing ring 343 is installed in the first groove. The first sealing ring 343 seals the second connecting channel 34 and the first connecting channel 36 together.

[0074] Specifically, when the support substrate 33 is fixedly installed on the support base 37, the first sealing ring 343 is located on the outer periphery of the end of the first connecting channel 36, connecting the first connecting channel 36 with the second connecting channel 34.

[0075] Specifically, the internal channel 32 includes a first through hole 321 and a second through hole 323, both of which are blocked at both ends. The first through hole 321 and the second through hole 323 are parallel and located on both sides of the through hole 21 respectively. It also includes a first blind hole 322, which blocks the opening. The first blind hole 322 connects the first through hole 321 and the second through hole 323. The first connecting channel 36 includes a second blind hole that communicates with the first blind hole 322. The opening of the second blind hole is located on the lower surface of the support substrate 33 and is sealed to the second connecting channel 34 through the first sealing ring 343.

[0076] Among them, some of the multiple suction ports 311 are connected to the first through hole 321, and the remaining parts are connected to the second through hole 323.

[0077] Specifically, the first through hole 321 and the second through hole 323 are machined and plugs are installed at both ends; the first blind hole 322 is machined and plugs are installed at the opening; the second blind hole is machined.

[0078] The suction port 311 and the suction pipe are distributed on both sides of the device 1 to make the suction force of the airflow uniform and improve the stability of the detection device.

[0079] Furthermore, a second groove is provided on the support plane 310 of the detection unit 31, and a second sealing ring 312 is installed in the second groove. The end of the suction port 311 is located in the inner ring of the second sealing ring 312, and the second sealing ring 312 corresponds to the lower plane of the substrate of the device 1.

[0080] A second sealing ring 312 is installed at the suction port 311 to further improve the sensitivity of the detection.

[0081] Example 3:

[0082] The power device reactive power aging test system of this embodiment includes the placement posture detection device for power devices before reactive power aging test as described in any of the above embodiments.

[0083] The testing process is as follows:

[0084] The device 1 is manually placed on the carrier 2 on the support substrate 33;

[0085] Start vacuum generating mechanism 4;

[0086] Airflow enters the internal channel 32 inside the support substrate 33 from the suction port 311, then enters the second connection channel 34 on the side plate 371 of the support base 37 through the first connection channel 36 on the support substrate 33, and then enters the vacuum generating mechanism 4.

[0087] When the device 1 is in the correct orientation, all four suction ports 311 can be blocked, the second sealing ring 312 is pressed, and then the transport mechanism transports the tray 2 into the test equipment.

[0088] If the orientation of device 1 is incorrect, the detection device will issue an alarm prompting for adjustment.

[0089] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A device for detecting the placement posture of power devices before reactive power aging test, characterized in that: The system includes a support structure (3), a vacuum generating mechanism (4), a connecting pipe connected to the vacuum generating mechanism (4), and a pressure sensor connected to the connecting pipe. The support structure (3) includes: A support substrate (33) is used to position the support tray (2), the tray (2) is used to position the support device (1), and the tray (2) has a through hole (21) in the middle that penetrates the upper and lower surfaces of the tray (2); The detection unit (31) is fixed on the upper surface of the support substrate (33). The upper end surface of the detection unit (31) forms a support plane (310) corresponding to the lower plane of the substrate of the device (1). The support plane (310) contacts the substrate surface of the device (1) to vertically position the device (1). A suction port (311) is provided on the detection unit (31). One end of the suction port (311) passes through the support plane (310), and the other end of the suction port (311) is connected to the connecting pipe. When the carrier disk (2) is positioned on the support substrate (33), the support plane (310) is located inside the perforation (21) and contacts the lower plane of the substrate of the device (1). When the vacuum generating mechanism (4) is activated, the device (1) is in normal posture when the pressure detected by the pressure sensor is within the normal pressure range, and the device (1) is in abnormal posture when the pressure of the pressure sensor is higher than the normal pressure range.

2. The device for detecting the placement posture of power devices before reactive power aging test as described in claim 1, characterized in that: The detection part (31) is a block structure protruding from the upper surface of the support substrate (33). There are multiple detection parts (31) and more than or equal to three. The multiple detection parts (31) are distributed circumferentially along the inner wall surface of the perforation (21). The support surfaces of the multiple detection parts (31) are all coplanar. The positions of the three detection parts (31) form a triangle. The suction port (311) is a cylindrical hole. One end of the suction port (311) penetrates the support plane (310), and the other end of the suction port (311) is connected to the connecting pipe.

3. The device for detecting the placement posture of power devices before reactive power aging test as described in claim 2, characterized in that: The connecting pipe includes an internal channel (32) located inside the support substrate (33), and the internal channel (32) is connected to the suction port (311); It also includes a first connecting channel (36) located inside the support substrate (33), one end of the first connecting channel (36) is connected to the internal channel (32), and the other end of the first connecting channel (36) passes through the lower surface of the support substrate (33) and is connected to the suction port (311) of the vacuum generating mechanism (4).

4. The device for detecting the placement posture of power devices before reactive power aging test as described in claim 3, characterized in that: The support structure (3) further includes a support base (37), the support substrate (33) is fixedly installed on the support base (37), and the vacuum generating mechanism (4) is fixedly installed on the support base (37).

5. The device for detecting the placement posture of power devices before reactive power aging test as described in claim 4, characterized in that: The support base (37) is a box-type structure. The side plate (371) of the box-type structure supports and connects to the support base plate (33). The vacuum generating mechanism (4) is located inside the box-type structure. The side plate (371) is provided with a second connecting channel (34). One end of the second connecting channel (34) is located on the end face of the side plate (371) and is sealed and connected to the first connecting channel (36). The other end of the second connecting channel (34) is located on the side of the side plate (371) and is equipped with a pipe connector (35). The pipe connector (35) is connected to the suction port (311) of the vacuum generating mechanism (4) through an air pipe.

6. The device for detecting the placement posture of power devices before reactive power aging test as described in claim 5, characterized in that: The end face of the side plate (371) is provided with a first groove, and a first sealing ring (343) is installed in the first groove. The first sealing ring (343) seals the second connecting channel (34) and the first connecting channel (36) together.

7. The device for detecting the placement posture of power devices before reactive power aging test as described in claim 6, characterized in that: The internal channel (32) includes a first through hole (321) and a second through hole (323) sealed at both ends. The first through hole (321) and the second through hole (323) are parallel and located on both sides of the perforation (21). It also includes a first blind hole (322) with the opening sealed. The first blind hole (322) connects the first through hole (321) and the second through hole (323). The first connecting channel (36) includes a second blind hole that communicates with the first blind hole (322). The opening of the second blind hole is located on the lower surface of the support substrate (33) and is sealed to the second connecting channel (34) by a first sealing ring (343). Among them, some of the multiple suction ports (311) are connected to the first through hole (321), and the remaining parts are connected to the second through hole (323).

8. The device for detecting the placement posture of power devices before reactive power aging test as described in any one of claims 1-7, characterized in that: The detection unit (31) has a second groove on its support plane (310), and a second sealing ring (312) is installed in the second groove. The end of the suction port (311) is located in the inner ring of the second sealing ring (312), and the second sealing ring (312) corresponds to the lower plane of the substrate of the device (1).

9. The device for detecting the placement posture of power devices before reactive power aging test as described in any one of claims 1-7, characterized in that: A first positioning pin (313) is provided on the support plane (310) or the carrier plate (2), and a first positioning hole (11) corresponding to the first positioning pin (313) is provided on the substrate of the device (1) for positioning the device (1) in the horizontal direction.

10. A test system for reactive power aging testing of power devices, characterized in that: Includes the placement posture detection device for power devices before reactive power aging test as described in any one of claims 1-9.

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