Multi-module insulation and voltage resistance testing device
By designing a multi-module insulation withstand voltage test device, the problem of low testing efficiency of IGBT discrete devices was solved, and simultaneous testing of multiple modules and accurate results were achieved, ensuring safety.
Patent Information
- Application Number
- CN202423252937.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing IGBT discrete devices suffer from low insulation withstand voltage testing efficiency, inconsistent testing equipment, difficulty in integration, and inability to detect contact conditions.
Design a multi-module insulation withstand voltage test device, including a force plate, an adjustment plate, a base plate and a test probe. The probe can be automatically lowered by an adjustment column and a spring structure. Combined with a limit mounting seat and an independent metal plate, multiple modules can be tested simultaneously.
It improves testing efficiency and accuracy, enabling simultaneous testing of pins and insulation components of multiple modules, ensuring the reliability and safety of test results.
Smart Images
Figure CN223955724U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to module test technical field, concretely relates to a kind of multi-module insulation withstand voltage testing device. BACKGROUND
[0002] At present, IGBT module is more and more widely used in air conditioner frequency converter, electric welding machine, photovoltaic inverter, wind power inverter and electric vehicle field, and the test requirement for discrete device is more and more strict.
[0003] Now, the discrete device of IGBT on the market has insulation characteristics when using, and it is important to test insulation withstand voltage before delivery. The discrete device of IGBT with insulation performance has low delivery test efficiency. The insulation test demand is high, up to several thousand volts, and the test equipment is large and different from other test systems, so it is difficult to integrate and test. The discrete device is small and delicate, and the single test fixture has low test efficiency and cannot detect the test contact condition.
[0004] Therefore, a multi-module insulation withstand voltage testing device is designed to overcome the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the deficiencies in the prior art, and provides a multi-module insulation withstand voltage testing device with simple and reasonable structure, practical convenience, efficient and safe testing.
[0006] The utility model discloses a kind of multi-module insulation withstand voltage testing devices, including the testing device body for carrying out insulation withstand voltage test to module to be measured, the testing device body is composed of stress plate, adjusting plate and bottom plate, the lower surface of the stress plate is fixedly installed in the just above of adjusting plate by both sides support foot, the adjusting plate is fixed on the upper surface of bottom plate by adjusting column of bottom both sides, the height of adjusting plate is adjusted by adjusting column, a plurality of through holes for installing test probe are opened in the middle position of adjusting plate, part of test probe is exposed to the lower surface of adjusting plate after installation, wherein part of test probe is connected with positive pole of power supply as pin test probe by cable, part of test probe is connected with negative pole of power supply as module to be measured insulation test probe by cable with indicator light, a substrate is limitingly installed in the upper surface of bottom plate just below test probe, a plurality of placing grooves and a row of evenly arranged through holes are opened on the substrate, each placing groove is placed with module to be measured, each pin of module to be measured and each through hole, each pin test probe are one-to-one corresponding, insulation part of module to be measured and module to be measured insulation test probe are corresponding, test circuit with test lamp is welded on the lower surface of bottom plate, two pieces of mutually independent metal sheets are respectively installed on the inner wall of each through hole, a certain interval is left between the upper end of each metal sheet and the pin of module to be measured, the lower end of its metal sheet is connected with test circuit, press stress plate, make adjusting plate drop by adjusting column, each test probe drops along with it, after pin test probe abuts against each pin of module to be measured, make each pin contact with corresponding two pieces of metal sheets, while module to be measured insulation test probe abuts against insulation part of module to be measured, at this time, test lamp of test circuit is bright, indicator light is not bright, then the pin and insulation part of module to be measured are normal, otherwise, there is abnormal.
[0007] As preferred: the adjusting column is hollow inside, for inserting and installing vertically arranged spring, one end of the spring is fixedly connected with the upper surface of bottom plate, the other end of the spring is fixedly connected with the lower surface of adjusting plate, and the height of spring under no stress is higher than the height of top surface of adjusting column, after stress plate is stressed, make the spring contract under pressure, adjusting plate drops along with it, when adjusting plate abuts against adjusting column, it is the lowest position of adjusting column, at this time, pin test probe and module to be measured insulation test probe just abut against each pin of module to be measured and insulation part of module to be measured respectively.
[0008] As preferred: the limit mounting seat is two blocks of baffle of inverted L type structure, which is set in the middle position of the upper surface of bottom plate, two blocks of baffle are symmetrically set left and right, a certain interval is set between two blocks of baffle, for horizontally inserting substrate.
[0009] As preferred: the test circuit is composed of a manual switch, a test power supply, a resistor and a plurality of test lamps, wherein the manual switch, the test power supply and the resistor are sequentially arranged on the main line of the test circuit, one side of the main line is connected with a branch line composed of a plurality of parallel circuits, one test lamp and three disconnected contact pins are respectively arranged on each parallel circuit, the position of each contact pin corresponds to the position of a through hole arranged on the substrate, and two metal sheets are respectively connected with two ends of each contact pin, when the pin test probe is pressed against the corresponding pin of the to-be-tested module, the corresponding contact pin on the parallel circuit is turned on, and the test lamp on the corresponding parallel circuit is turned on under the normal condition of the pin.
[0010] As preferred: one side of the substrate is provided with an elongated through hole as a hand holding part, facilitating pulling the substrate.
[0011] As preferred: the to-be-tested module is a discrete device.
[0012] As preferred: the test lamps are all arranged on the side of the bottom plate, facilitating observation.
[0013] The beneficial effects of the utility model are as follows:
[0014] The test device designed in the utility model can be provided with a plurality of to-be-tested modules (discrete devices) on the substrate at a time, the test probe is lowered by pressing the stress plate, contacts the pin and the insulating part of the to-be-tested module, the single or multiple to-be-tested modules (discrete devices) can be powered on and the insulating test of the insulating part (whether the pin is correctly installed) is simultaneously performed, thereby improving the overall work efficiency, and the test result is accurate. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the overall structure schematic view of the utility model.
[0016] Figure 2 It is the top view of the bottom plate in the utility model.
[0017] Figure 3 It is the side view of the utility model.
[0018] Figure 4 It is the schematic view of the test circuit in the utility model.
[0019] Figure 5 It is the structure schematic view of the to-be-tested module in the utility model. DETAILED DESCRIPTION
[0020] In order to make those skilled in the art more clearly understand the purpose, technical scheme and advantages of the utility model, the utility model is further described below in combination with the drawings and examples.
[0021] In the description of the utility model, it needs to understand that the orientation or position relation indicated by the terms such as '' upper '', '' lower '', '' left '', '' right '', '' inner '', '' outer '', '' horizontal direction '' and '' vertical direction '' is the orientation or position relation based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model, and is not indicated or implied that the device or element indicated must have a particular orientation, so it can not be understood as the limitation of the utility model.
[0022] The utility model will be described in detail below in combination with the drawings: as Figures 1-3 Indicated, a kind of multi-module insulation withstand voltage testing device, including the testing device body for carrying out insulation withstand voltage test to module to be measured, the testing device body is composed of stress plate 1, adjusting plate 2 and bottom plate 3, the lower surface of stress plate 1 is fixedly installed in the just above of adjusting plate 2 by the support foot 4 of both sides, adjusting plate 2 is fixed on the upper surface of bottom plate 3 by adjusting column 5 of bottom both sides, the height of adjusting plate 2 is adjusted by adjusting column 5, a plurality of through holes for installing test probe 6 are opened in the middle position of adjusting plate 2, as Figure 3 Indicated, after installation test probe 6 part exposes in the lower surface of adjusting plate 2, wherein part test probe is connected to the positive pole of power supply as pin test probe 7 by cable, part test probe is connected to the negative pole of power supply as module to be measured insulation test probe 8 by cable with indicator light, a base plate 10 is limitingly installed in the upper surface of bottom plate 3 just below test probe by limiting mounting seat 9, a plurality of placing grooves 11 and a row of evenly arranged through holes 12 are opened on the base plate 10, each placing groove 11 is placed with module to be measured 13, after placement, each pin 14 of module to be measured 13 and each through hole 12, each pin test probe 7 are one-to-one corresponding, the insulation part 15 of module to be measured 13 and module to be measured insulation test probe 8 are corresponding, test circuit 19 with test lamp 16 is welded on the lower surface of bottom plate 3, two pieces of mutually independent metal sheets 17 are respectively installed on the inner wall of each through hole 12, a certain interval 18 is left between the upper end of each metal sheet 17 and the pin 14 of module to be measured, the lower end of its metal sheet 17 is connected with test circuit 19, press stress plate 1, make adjusting plate 2 drop by adjusting column 5, each test probe drops, wherein pin test probe 7 is pressed against each pin 14 of module to be measured, so that each pin 14 is contacted with corresponding two pieces of metal sheets 17 at the same time (at this time, pin test probe and metal sheet have no direct contact), module to be measured insulation test probe 8 is pressed against the insulation part 15 of module to be measured 13, at this time, test lamp 16 of test circuit 19 is bright, indicator light is not bright, then the performance of pin 14 and insulation part 15 of module to be measured is normal, otherwise, there is abnormal.
[0023] In order to ensure that the multi-module test is not disturbed by the number, each module is detected separately, and the detection cannot be caused by the number of tests.
[0024] The pin test probe and the to-be-tested module insulation test probe are independent of each other, each pin test probe can be short-circuited according to requirements, and the to-be-tested module insulation test probe is not connected in short circuit with the pin test probe.
[0025] The utility model discloses a left and right two independent metal sheets are arranged on the inner wall of each through hole, and the design can guarantee that the test circuit at the bottom of the bottom plate is in an open circuit state when the test probe is not working.
[0026] The simple circuit formed by the pin test probe, the to-be-tested module insulation test probe and the external power supply includes a cable, a resistor, a power supply and a switch (a conventional design), so no detailed introduction is made.
[0027] The adjusting column 5 is hollow, and is used for inserting and mounting the vertically arranged spring 20, one end of the spring 20 is fixedly connected with the upper surface of the bottom plate 3 and protrudes out of the adjusting column 5, the other end of the spring 20 is fixedly connected with the lower surface of the adjusting plate 2 and protrudes out of the adjusting column 5, and the height of the spring 20 under the stress-free condition is higher than the height of the top surface of the adjusting column 5; after the stress plate 1 is stressed, the spring 20 is compressed and shrunk, and the adjusting plate 2 is lowered; when the adjusting plate 2 abuts against the adjusting column 5, the adjusting column 5 is in the lowest position, at this moment, the pin test probe 7 and the to-be-tested module insulation test probe 8 abut against each pin 14 of the to-be-tested module 13 and the insulation part 15 of the to-be-tested module respectively.
[0028] The spring placed in the adjusting column is slightly higher than the adjusting column, can meet the pressing and rebound functions, and the adjusting column itself plays a role in limiting the lowest position; if the placing force is too large, the adjusting plate is too low, and the to-be-tested device is damaged, so that the safety and efficiency of the whole test are ensured.
[0029] The limiting mounting seat 9 is two blocks of baffle plates 21 arranged in the upside middle position of the bottom plate and in an inverted L-shaped structure, the two blocks of baffle plates 21 are symmetrically arranged left and right, a certain spacing is arranged between the two blocks of baffle plates 21, and the substrate 10 is horizontally inserted.
[0030] The limiting mounting seat of the utility model can limit the substrate and the to-be-tested module on the substrate, prevent displacement in the test process, greatly improve the accuracy, and prevent unnecessary damage.
[0031] As Figure 4As shown, the test circuit 19 is composed of a manual switch 22, a test power supply 23, a resistor 24 and a plurality of test lamps 16, wherein the manual switch 22, the test power supply 23 and the resistor 24 are sequentially arranged on a main line 25 of the test circuit 19, and the main line 25 is connected with a branch line 27 composed of a plurality of parallel circuits 26 on one side, each parallel circuit 26 is respectively provided with a test lamp 16 and three disconnected contact pins 28, the position of each contact pin 28 corresponds to the position of a through hole 12 on the substrate 10, and two metal sheets 17 are respectively connected with two ends of each contact pin 28, when the pin test probe 7 abuts against the corresponding pin 14 of the to-be-tested module 13, the corresponding contact pin 28 on the parallel circuit 26 is turned on, and the test lamp on the parallel circuit 26 is turned on under the normal condition of the pin 14.
[0032] One side of the substrate 10 is provided with an elongated through hole 29 as a hand holding part, facilitating pulling the substrate 10. Figure 5 As shown, the to-be-tested module 13 is a discrete device. The test lamps 16 are all mounted on the side of the bottom plate 3, facilitating observation.
[0033] When the module is not placed in the substrate placing groove (test position) or the module position is placed awry, the probe is not in contact with the two metal sheets at the bottom under the pressing, so the test circuit is not turned on (the test lamp is not turned on), thereby ensuring the normal use of the whole device.
[0034] The specific embodiments described in the present application are only illustrative of the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.
Claims
1. A multi-module insulation withstand voltage testing device comprising a testing device body for performing insulation withstand voltage testing on a module under test, characterized by: The test device body is composed of a force plate (1), an adjusting plate (2) and a bottom plate (3), the lower surface of the force plate (1) is fixedly installed above the adjusting plate (2) through the support feet (4) on both sides, the adjusting plate (2) is fixed on the upper surface of the bottom plate (3) through the adjusting columns (5) on both sides of the bottom, the height of the adjusting plate (2) is adjusted through the adjusting columns (5), a plurality of through holes for installing test probes (6) are arranged in the middle position of the adjusting plate (2), part of the installed test probes (6) is exposed to the lower surface of the adjusting plate (2), part of the test probes is connected to the positive pole of the external power supply as a pin test probe (7) through a cable, part of the test probes is connected to the negative pole of the external power supply as a to-be-tested module insulation test probe (8) through a cable with an indicator lamp, a base plate (10) is limitingly installed on the upper surface of the bottom plate (3) below the test probes through a limiting mounting seat (9), a plurality of placing grooves (11) and a row of uniformly arranged through holes (12) are arranged on the base plate (10), a to-be-tested module (13) is placed in each placing groove (11), each pin (14) of the placed to-be-tested module (13) corresponds to each through hole (12) and each pin test probe (7) one by one, the insulation part (15) of the to-be-tested module (13) corresponds to the to-be-tested module insulation test probe (8) one by one, a test circuit (19) with a test lamp (16) is welded on the lower surface of the bottom plate (3), two mutually independent metal sheets (17) are respectively installed on the inner walls of each through hole (12), a certain interval (18) is left between the upper end of each metal sheet (17) and the pin (14) of the to-be-tested module, the lower end of the metal sheet (17) is connected to the test circuit (19), the force plate (1) is pressed, the adjusting plate (2) is lowered through the adjusting column (5), each test probe is lowered, after the pin test probe (7) abuts against each pin (14) of the to-be-tested module, each pin (14) is in contact with the corresponding two metal sheets (17) respectively, at the same time, the to-be-tested module insulation test probe (8) abuts against the insulation part (15) of the to-be-tested module (13), at this time, the test lamp (16) of the test circuit (19) is bright, the indicator lamp is not bright, then the performance of the pin (14) and the insulation part (15) of the to-be-tested module is normal, otherwise, there is an abnormality.
2. The multi-module insulation withstand voltage test device according to claim 1, characterized in that: The adjusting column (5) is hollow inside, used for inserting and mounting the vertically arranged spring (20), one end of the spring (20) is fixedly connected with the upper surface of the bottom plate (3) and extends out of the adjusting column (5), the other end is fixedly connected with the lower surface of the adjusting plate (2) and extends out of the adjusting column (5), and the height of the spring (20) under the stress-free condition is higher than the height of the top surface of the adjusting column (5), after the stress plate (1) is stressed, the spring (20) is compressed and shrunk, the adjusting plate (2) is lowered, when the adjusting plate (2) abuts against the adjusting column (5), it is the lowest position of the adjusting column (5), at this time, the pin test probe (7) and the insulation test probe (8) of the to-be-tested module are just abut against each other against every pin (14) of the to-be-tested module (13) and the insulation part (15) of the to-be-tested module.
3. The multi-module insulation withstand voltage test device according to claim 1, characterized in that: The limiting mounting seat (9) is two blocks of baffle plates (21) in inverted L-shaped structure arranged at the middle position of the upper surface of the bottom plate, the two blocks of baffle plates (21) are symmetrically arranged left and right, and a certain spacing is arranged between the two blocks of baffle plates (21), used for horizontally inserting the base plate (10).
4. The multi-module insulation withstand voltage test device according to claim 1, characterized in that: The test circuit (19) is composed of a manual switch (22), a test power supply (23), a resistor (24) and a plurality of test lamps (16), wherein the manual switch (22), the test power supply (23) and the resistor (24) are sequentially arranged on the main line (25) of the test circuit (19), one side of the main line (25) is connected with a branch line (27) composed of a plurality of parallel circuits (26), one test lamp (16) and three disconnected contact pins (28) are respectively arranged on each parallel circuit (26), the position of each contact pin (28) corresponds to the position of the through hole (12) opened on the base plate (10), and two metal sheets (17) are respectively connected with two ends of each contact pin (28), when the pin test probe (7) abuts against the corresponding pin (14) of the to-be-tested module (13), the corresponding contact pin (28) on the parallel circuit (26) is turned on, and the test lamp on the corresponding parallel circuit (26) is turned on under the normal condition of the pin (14).
5. The multi-module insulation withstand voltage test device according to claim 3, characterized in that: One side of the base plate (10) is provided with an elongated through hole (29) as a hand holding part, facilitating pulling the base plate (10).
6. The multi-module insulation withstand voltage test device according to claim 4, characterized in that: The to-be-tested module (13) is a discrete device.
7. The multi-module insulation withstand voltage testing device according to claim 5, characterized in that: The test lamps (16) are all arranged on the side surface of the bottom plate (3), facilitating observation.