A spliced ​​power module test fixture

Abstract

The present invention proposes a spliced ​​power module test fixture, comprising: a clamping box, a cable, a plurality of jack assemblies, a plurality of transverse blocks and a plurality of longitudinal blocks, a through hole is arranged on the front end plate of the clamping box, and the rear end plate of the clamping box is detachably connected with the left and right side plates and the bottom plate of the clamping box; the cable passes into the clamping box from the through hole, and the cable contains a plurality of wires; the upper end of each jack assembly is respectively provided with a plug-in hole, and the lower end of the jack assembly is connected with the wires in the cable; each transverse block is spliced ​​on the left and / or right side of one or more jack assemblies to adjust the transverse position of the jack assembly in the clamping box; each longitudinal block is spliced ​​on the front and / or rear side of one or more jack assemblies to adjust the longitudinal position of the jack assembly in the clamping box. The present invention can test power modules with different packaging forms and pin arrangements, ensuring the test accuracy of the product and improving the test efficiency.

Description

Technical Field

[0001] The invention belongs to the field of electrical tools, and in particular relates to a spliced ​​power module test fixture. Background Art

[0002] The main technical indicators of the power module include output voltage accuracy, voltage regulation, load regulation, temperature coefficient, output ripple and noise, dynamic response, start-up time and start-up overshoot, efficiency, etc. In the production, testing, inspection, screening, use and other links of the power module, it is inseparable from the testing of various technical indicators of the power module. For this reason, the power module manufacturers, users, screening manufacturers, and inspection manufacturers all need to configure power module test equipment and power module test fixtures.

[0003] The power module test equipment is used to test various technical indicators of the power module; the power module test fixture is used to reliably and safely connect the various pins of the power module to the corresponding electrical connector ports of the power module test equipment. The existing power module test fixture generally adopts the "base + matcher" method. When using, the matcher must be placed on the base first, the electrical connectors of the two are correspondingly plugged in place, and then the electrical connector pair of the base test cable is plugged into the corresponding electrical connector port of the power module test equipment, and then the power module is plugged into the jack on the upper part of the matcher before the test can be carried out. The existing "base + matcher" type power module test fixture has the following problems: 1. The connection circuit from the power module under test to the power module test equipment is inside the test fixture (excluding the external interface of the test fixture), that is, between the base and the matcher, passing through a pair of electrical connectors and two sets of welding points. The resistance of the connection circuit is large, which makes the voltage loss on the connection circuit large during the test, resulting in a large system error in the test. 2. Once the position of the jack on the upper part of the test fixture matcher is determined, only power modules with a specific package form and pin arrangement can be plugged in, and the test equipment can only test power modules with this package form and pin arrangement. To complete the testing of power modules with various packaging forms and pin arrangements, multiple corresponding matchers are required, that is, the adaptability of the test fixture is poor.

[0004] With the rapid development of my country's power module industry, the variety and output of power modules have increased year by year. However, the power module test fixtures currently used have problems such as large resistance in the connection circuit, large system error in the test, poor adaptability, and inability to test power modules with different packaging forms and pin arrangements. These problems make it difficult to meet the development needs of the power module industry. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a spliced ​​power module test fixture for overcoming the above problems or at least partially solving or alleviating the above problems.

[0006] The present invention provides a spliced ​​power module test fixture, comprising:

[0007] A clamping box, the clamping box is rectangular, the upper end of which is open, a through hole is provided on the front end plate of the clamping box, and the rear end plate of the clamping box is detachably connected to the left and right side plates and the bottom plate of the clamping box;

[0008] A cable, the cable passes through the through hole into the clamping box, and the cable contains a plurality of wires;

[0009] A plurality of jack assemblies, each of which has a plug hole at its upper end, and a lower end of each jack assembly connected to the wire in the cable;

[0010] A plurality of transverse blocks, each of which is spliced ​​on the left side and / or right side of one or more of the jack assemblies, and fixes the transverse position of each of the jack assemblies in the clamping box;

[0011] A plurality of longitudinal blocks, each of which is spliced ​​on the front side and / or the rear side of one or more of the jack assemblies, to fix the longitudinal position of each of the jack assemblies in the clamping box.

[0012] The present invention also has the following optional features.

[0013] Optionally, each of the transverse blocks has a plurality of transverse widths, and a longitudinal width of each of the transverse blocks is equal to a longitudinal width of the jack assembly.

[0014] Optionally, each of the longitudinal blocks has a plurality of longitudinal widths, and a transverse width of each of the longitudinal blocks is consistent and equal to the transverse width of the inner side of the clamping box.

[0015] Optionally, the heights of the jack assembly, the transverse block and the longitudinal block are equal and smaller than the depth of the clamping box.

[0016] Optionally, first ridges and first grooves are respectively provided on the left and right sides of the transverse block, the left and right sides of the socket assembly, the left and right inner walls of the clamping box, and the left and right sides of the longitudinal block, and the first ridges and the first grooves match each other.

[0017] Optionally, second ridges and second grooves are respectively provided on the front and rear sides of the transverse block, the front and rear sides of the socket assembly, the inner side walls of the front and rear plates of the clamping box, and the front and rear sides of the longitudinal block, and the second ridges and second grooves match each other.

[0018] Optionally, the jack assembly includes an insulating jack seat and a metal jack head, the insulating jack seat is provided with a mounting hole, the metal jack head is fixed in the mounting hole, the upper end of the metal jack head is provided with the plug hole, the lower end of the metal jack head is provided with a soldering cup, and the wire in the cable is welded and connected to the soldering cup.

[0019] Optionally, a necking is provided in the mounting hole in the insulating jack seat, an annular groove is provided in the middle of the metal jack head, an annular step is provided below the annular groove, the outer diameter of the annular step is larger than the inner diameter of the necking, and a conical open pin is installed in the annular groove.

[0020] The spliced ​​power module test fixture of the present invention is used for fixing and connecting lines during power module testing, is suitable for testing power modules with various packaging forms and pin arrangements, and can test most domestic and foreign power modules. It solves the problems of existing power module test fixtures, such as large connection circuit resistance, large test system error, poor adaptability, and inability to test power modules with different packaging forms and pin arrangements, thereby ensuring product testing accuracy and improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a longitudinal full-section structural diagram of an embodiment of the spliced ​​power module test fixture of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the forward structure;

[0023] Figure 3 yes Figure 1 A schematic diagram of the transverse cross-sectional structure of the clamping box;

[0024] Figure 4 yes Figure 1 A schematic diagram of the full cross-section structure of the jack assembly;

[0025] Figure 5 yes Figure 4 A schematic diagram of the full cross-section structure of the insulating jack seat;

[0026] Figure 6 yes Figure 4 A schematic diagram of the full cross-section structure of the metal jack head;

[0027] In the above figure: 1 clamping box; 101 front end plate; 102 through hole; 103 rear end plate; 2 cable; 201 wire; 3 jack assembly; 310 insulating jack seat; 311 mounting hole; 312 reduction; 320 metal jack head; 321 plug hole; 322 solder cup; 323 annular groove; 324 annular step; 4 horizontal piece; 5 longitudinal piece; 6 first ridge; 7 first groove; 8 second ridge; 9 second groove; 10 conical cotter pin.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] Example 1

[0030] refer to Figures 1 to 3 The embodiment of the present invention provides a spliced ​​power module test fixture, comprising: a clamping box 1, a cable 2, a plurality of jack assemblies 3, a plurality of horizontal blocks 4 and a plurality of vertical blocks 5; the clamping box 1 is rectangular, and its upper end is open. A through hole 102 is provided on a front end plate 101 of the clamping box 1. A rear end plate 103 of the clamping box 1 is detachably connected to the left and right side plates and the bottom plate of the clamping box 1 through a slot structure; the cable 2 passes into the clamping box 1 through the through hole 102, and the cable 2 contains a plurality of wires 201; a plug hole 321 is respectively provided at the upper end of each jack assembly 3, and the lower end of the jack assembly 3 is connected to the wire 201 in the cable 2; each horizontal puzzle block 4 is spliced ​​on the left side and / or right side of one or more jack assemblies 3, and the horizontal position of each jack assembly 3 is fixed in the clamping box 1; each longitudinal puzzle block 5 is spliced ​​on the front side and / or rear side of one or more jack assemblies 3, and the longitudinal position of each jack assembly 3 is fixed in the clamping box 1.

[0031] The plug holes 321 on each jack assembly 3 should correspond to the pins of a power module to be tested. After the pins are inserted into the plug holes 321, the pins of the power module are connected to the wires 201 in the cable 2, and the power module can be tested. Each pin of the power module has a horizontal position and a vertical position. A plurality of jack assemblies 3 are arranged in the clamping box 1. Each jack assembly 3 corresponds to a pin of the power module. The space between each jack assembly 3 is filled with a plurality of horizontal blocks 4 and a plurality of vertical blocks 5, so that the horizontal position and the vertical position of each jack assembly 3 in the clamping box 1 are fixed. Different power modules have different pin arrangements. When testing another power module, it is necessary to adjust the position of each jack assembly 3 according to its pin arrangement, and then fill the space between each jack assembly 3 with a plurality of horizontal blocks 4 and a plurality of vertical blocks 5, so that the horizontal position and the vertical position of each jack assembly 3 in the clamping box 1 are fixed.

[0032] Example 2

[0033] refer to Figure 2 On the basis of Embodiment 1, each transverse block 4 has a plurality of transverse widths, and the longitudinal width of each transverse block 4 is equal to the longitudinal width of the jack assembly 3 .

[0034] The transverse position of each socket assembly 3 in the clamping box 1 can be spliced ​​and adjusted by transverse blocks 4 with various transverse widths. The longitudinal widths of each transverse block 4 and each socket assembly 3 are equal, which is convenient for the next step to perform longitudinal positioning.

[0035] Example 3

[0036] refer to Figure 1 and Figure 2 On the basis of Example 2, each longitudinal block 5 has a variety of longitudinal widths, and the transverse width of each longitudinal block 5 is consistent and equal to the transverse width of the inner side of the clamping box 1.

[0037] The lateral width of each longitudinal block 5 is the internal width of the clamping box 1, which can increase its stability. At the same time, each longitudinal block 5 has a variety of longitudinal widths. By selecting longitudinal blocks 5 with different longitudinal widths for combination, each socket assembly 3 can be positioned in the clamping box 1 at the required longitudinal position.

[0038] Example 4

[0039] refer to Figure 1 On the basis of embodiment 1, the heights of the jack assembly 3, the transverse block 4 and the longitudinal block 5 are equal and smaller than the depth of the clamping box 1.

[0040] When the jack assembly 3, the transverse block 4 and the longitudinal block 5 are neatly assembled in the clamping box 1, a certain space can be formed between their lower ends and the bottom surface of the inner side of the clamping box 1, so as to facilitate the electrical connection between each wire 201 in the cable 2 and the lower end of each jack assembly 3.

[0041] Example 5

[0042] refer to Figure 3 On the basis of Example 1, first ridges 6 and first grooves 7 are respectively provided on the left and right sides of the transverse block 4, the left and right sides of the socket assembly 3, the left and right inner walls of the clamping box 1, and the left and right sides of the longitudinal block 5, and the first ridges 6 and the first grooves 7 match each other.

[0043] The transverse block 4, the socket assembly 3, the left and right side walls of the clamping box 1 and the longitudinal block 5 are respectively spliced ​​by the first ridge 6 and the first groove 7, so that the transverse block 4, the socket assembly 3, the left and right side walls of the clamping box 1 and the longitudinal block 5 can be mutually constrained and aligned in the vertical direction.

[0044] Example 6

[0045] refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 On the basis of Example 1, second ridges 8 and second grooves 9 are respectively provided on the front and rear sides of the transverse block 4, the front and rear sides of the socket assembly 3, the inner side walls of the front end plate 101 and the rear end plate 103 of the clamping box 1, and the front and rear sides of the longitudinal block 5, and the second ridges 8 and the second grooves 9 match each other.

[0046] The transverse block 4, the jack assembly 3, the front end plate 101 and the rear end plate 103, and the longitudinal block 5 are respectively spliced ​​by the second ridge 8 and the second groove 9, so that the transverse block 4, the jack assembly 3, the front end plate 101 and the rear end plate 103, and the longitudinal block 5 can be mutually constrained and aligned in the vertical direction.

[0047] Example 7

[0048] refer to Figures 4 to 6 On the basis of any of the above embodiments, the jack assembly 3 includes an insulating jack seat 310 and a metal jack head 320, the insulating jack seat 310 is provided with a mounting hole 311, the metal jack head 320 is fixed in the mounting hole 311, the upper end of the metal jack head 320 is provided with a plug hole 321, the lower end of the metal jack head 320 is provided with a welding cup 322, and the wire 201 in the cable 2 is welded and connected to the welding cup 322.

[0049] The wire 201 in the cable 2 is welded to the solder cup 322 at the lower end of the metal jack head 320. The metal jack head 320 is assembled in the mounting hole 311 of the insulating jack seat 310. The plug hole 321 on the metal jack head 320 leads to the upper port of the insulating jack seat 310, which is convenient for plugging with the pin of the power module to make it conductive with the wire 201 in the cable 2. The above connection structure can reduce the resistance of the connection circuit and reduce the error of the test system.

[0050] Example 8

[0051] refer to Figures 4 to 6On the basis of Example 7, a constriction 312 is provided in the mounting hole 311 in the insulating jack seat 310, an annular groove 323 is provided in the middle of the metal jack head 320, an annular step 324 is provided below the annular groove 323, the outer diameter of the annular step 324 is larger than the inner diameter of the constriction 312, and a conical cotter pin 10 is installed in the annular groove 323.

[0052] First, the conical cotter pin 10 is sleeved on the annular groove 323 of the metal jack head 320, and then the upper end of the metal jack head 320 is extended into the mounting hole 311 of the insulating jack seat 310. The conical cotter pin 10 passes through the constriction 312 and then opens. The annular step 324 is stuck under the constriction 312, so that the metal jack head 320 can be fixed in the insulating jack seat 310.

[0053] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A spliced ​​power module test fixture, characterized in that: include: A clamping box (1), the clamping box (1) is rectangular and has an open upper end, a through hole (102) is provided on a front end plate (101) of the clamping box (1), and a rear end plate (103) of the clamping box (1) is detachably connected to the left and right side plates and the bottom plate of the clamping box (1); A cable (2), the cable (2) passing through the through hole (102) into the clamping box (1), the cable (2) comprising a plurality of wires (201); A plurality of jack assemblies (3), each of the jack assemblies (3) being provided with a plug hole (321) at the upper end thereof, the lower end of the jack assemblies (3) being connected to the wire (201) in the cable (2), the plug hole (321) on each jack assembly (3) corresponding to a pin of a power module to be tested; A plurality of transverse blocks (4), each of the transverse blocks (4) being spliced ​​to the left side and / or the right side of one or more of the socket assemblies (3) to fix the transverse position of each of the socket assemblies (3) in the clamping box (1); A plurality of longitudinal blocks (5), each of the longitudinal blocks (5) being spliced ​​to the front side and / or the rear side of one or more of the jack assemblies (3), and fixing the longitudinal position of each of the jack assemblies (3) in the clamping box (1).

2. The spliced ​​power module test fixture according to claim 1, characterized in that: Each of the transverse blocks (4) has a variety of transverse widths, and the longitudinal width of each of the transverse blocks (4) is equal to the longitudinal width of the socket assembly (3).

3. The spliced ​​power module test fixture according to claim 1, characterized in that: Each of the longitudinal blocks (5) has a variety of longitudinal widths, and the transverse width of each of the longitudinal blocks (5) is consistent and equal to the transverse width of the inner side of the clamping box (1).

4. The spliced ​​power module test fixture according to claim 1, characterized in that: The heights of the socket assembly (3), the transverse assembly block (4) and the longitudinal assembly block (5) are equal and smaller than the depth of the clamping box (1).

5. The spliced ​​power module test fixture according to claim 1, characterized in that: The left and right sides of the transverse block (4), the left and right sides of the socket assembly (3), the left and right inner walls of the clamping box (1), and the left and right sides of the longitudinal block (5) are respectively provided with a first ridge (6) and a first groove (7), and the first ridge (6) and the first groove (7) match each other.

6. The spliced ​​power module test fixture according to claim 1, characterized in that: Second ridges (8) and second grooves (9) are respectively provided on the front and rear sides of the transverse block (4), the front and rear sides of the socket assembly (3), the inner side walls of the front plate (101) and the rear plate (103) of the clamping box (1), and the front and rear sides of the longitudinal block (5), and the second ridges (8) and the second grooves (9) match each other.

7. The spliced ​​power module test fixture according to any one of claims 1 to 6, characterized in that: The jack assembly (3) comprises an insulating jack seat (310) and a metal jack head (320); the insulating jack seat (310) is provided with a mounting hole (311); the metal jack head (320) is fixed in the mounting hole (311); the upper end of the metal jack head (320) is provided with the plug hole (321); the lower end of the metal jack head (320) is provided with a soldering cup (322); the wire (201) in the cable (2) is connected to the soldering cup (322) by soldering.

8. The spliced ​​power module test fixture according to claim 7, characterized in that: The mounting hole (311) in the insulating socket seat (310) is provided with a constriction (312), the middle portion of the metal socket head (320) is provided with an annular groove (323), an annular step (324) is provided below the annular groove (323), the outer diameter of the annular step (324) is larger than the inner diameter of the constriction (312), and a conical cotter pin (10) is inserted into the annular groove (323).

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