IGBT pin short circuit test tool

Abstract

The utility model discloses an IGBT pin short circuit test tool, which comprises a main shell, a probe and a flexible wire, two ends of the flexible wire are respectively connected with the main shell and the probe, the main shell is provided with an audible and visual alarm and a power switch, the main shell is internally provided with a power supply, and the probe is connected with the probe. The audible and visual alarm and the power switch are electrically connected with the power supply; wherein the probe comprises three probes which are arranged in sequence, the probes are metal conductors, the positions of the probes correspond to the positions of three pins of an IGBT respectively, the three probes are electrically connected with the power supply through wires wrapped in a flexible wire, and every two adjacent probes are arranged in an insulated mode. According to the IGBT pin short circuit test tool designed by the utility model, the structure of the tool is optimized, the probe can be effectively utilized to detect whether short circuit occurs between pins due to tin leakage of the pins of the IGBT in real time, and the tool is convenient to use and has good popularization prospect and application value.

Description

Technical Field

[0001] The utility model relates to the technical field of short-circuit testing, in particular to an IGBT pin short-circuit testing tool. Background Art

[0002] As is known to all, IGBT (Insulate-Gate Bipolar Transistor) is a commonly used electronic component, which is widely used in various electrical products. In practical applications, the IGBT is generally soldered on a circuit board by manual soldering.

[0003] When actually welding the IGBT, since the three pins of the IGBT are relatively close to each other, it is easy for the two pins to be short-circuited due to tin leakage after manual welding, thus causing product defects. In addition, it is not convenient for current welders to directly visually check whether the pins of the IGBT are short-circuited due to tin leakage. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an IGBT pin short circuit test tool, which solves the problem that existing operators cannot effectively check whether there is a short circuit between two pins of an insulated gate bipolar transistor due to tin leakage by optimizing its own structure.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: an IGBT pin short-circuit test tool, which includes: a main shell, a probe and a flexible wire, the two ends of the flexible wire are respectively connected to the main shell and the probe, the main shell is provided with an audible and visual alarm and a power switch, the main shell is provided with a power supply, the audible and visual alarm and the power switch are electrically connected to the power supply; wherein, the probe includes three probes arranged in sequence, the probes are metal conductors, and the positions of these probes correspond to the positions of the three pins of the IGBT respectively, the three probes are electrically connected to the power supply through the wires coated in the flexible wire, and the two adjacent probes are insulated.

[0006] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the power supply is a 5V DC power supply.

[0007] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the three probes are connected in parallel with each other.

[0008] Furthermore, in the IGBT pin short circuit test tool described in the utility model, at least two sound and light alarms are provided on the main housing, and at least two of the sound and light alarms are connected in parallel with each other.

[0009] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the sound and light alarm includes an indicator light and a loudspeaker.

[0010] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the probe further includes a secondary shell, one end of the flexible wire is connected to the main shell, and the other end of the flexible wire is connected to the secondary shell.

[0011] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the three probes are arranged in sequence in the width direction of the auxiliary shell and are arranged in the auxiliary shell, and the three probes are extended along the length direction of the auxiliary shell.

[0012] Furthermore, in the IGBT pin short circuit test tool described in the utility model, a mounting groove is provided in the sub-shell, the probe is arranged in the mounting groove, and one end of the probe has a spacing of 3 mm from the notch of the mounting groove.

[0013] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the auxiliary shell is a plastic insulating shell.

[0014] Furthermore, in the IGBT pin short circuit test tool described in the utility model, there is a 3mm interval between two adjacent probes.

[0015] The beneficial effect of the utility model is that the IGBT pin short-circuit test tool designed by the utility model can effectively use its own probe to detect in real time whether the pins of the IGBT are short-circuited due to tin leakage, by optimizing its own structure. In actual application, since the probe and the main shell are connected by a flexible line, the operator can control the main shell carrying the power supply to remain stationary, and only needs to control the positions of the three probes of the probe to correspond to the positions of the three pins of the IGBT, so as to effectively test the solder quality of the IGBT. When the pins of the IGBT are short-circuited, the sound and light alarm can be used to alarm, thereby reminding the user that a short circuit occurs between the pins of the IGBT, which is convenient for the operator to repair.

[0016] It can be seen that the IGBT pin short-circuit test tool of the utility model can be effectively applied to the reliability test of IGBT, is easy to use, has intuitive and clear test results, and has good promotion prospects and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the IGBT pin short circuit test tool of the utility model in one embodiment from one viewing angle;

[0018] Figure 2 for Figure 1 The enlarged view of the A part of the IGBT pin short circuit test tool shown;

[0019] Figure 3 It is a structural schematic diagram of the IGBT pin short circuit test tool of the utility model in another perspective under one implementation mode;

[0020] Figure 4 This is a structural explosion diagram of the IGBT pin short circuit test tool described in the utility model in one implementation manner;

[0021] Figure 5 The present invention is a circuit diagram of an IGBT pin short circuit test tool in one implementation manner.

[0022] Description of labels:

[0023] 1. Main shell;

[0024] 2. probe; 21. auxiliary housing; 211. mounting slot; 22. probe;

[0025] 3. Flexible line;

[0026] 4. Sound and light alarm;

[0027] 5. Power switch;

[0028] 6. Power supply;

[0029] 7. Power plug. DETAILED DESCRIPTION

[0030] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0031] Please refer to Figure 1 and Figure 5 As shown, the utility model designs an IGBT pin short-circuit test tool, which includes: a main shell 1, a probe 2 and a flexible wire 3, wherein two ends of the flexible wire 3 are respectively connected to the main shell 1 and the probe 2, the main shell 1 is provided with an audible and visual alarm 4 and a power switch 5, a power supply 6 is provided in the main shell 1, and the audible and visual alarm 4 and the power switch 5 are both electrically connected to the power supply 6; wherein the probe 2 includes three probes 22 arranged in sequence, the probes 22 are metal conductors, and the positions of these probes 22 correspond to the positions of the three pins of the IGBT, respectively, the three probes 22 are electrically connected to the power supply 6 through the wires coated in the flexible wire 3, and two adjacent probes 22 are insulated.

[0032] From the above description, it can be seen that in the present utility model, the inventor has optimized and designed a new IGBT pin short-circuit test tool. By optimizing its own structure, it can effectively use its own probe 2 to detect in real time whether the IGBT pins are short-circuited due to tin leakage.

[0033] Based on the above configuration, when the IGBT pin short circuit test tool is actually used, since the probe 2 is connected to the main housing 1 through the flexible wire 3, the operator can control the main housing 1 carrying the power supply 6 to remain stationary, and only needs to control the probe 2 to move, and make the positions of the three probes 22 of the probe 2 correspond to the positions of the three pins of the IGBT respectively. Since the probes 22 are metal conductors and are electrically connected to the power supply 6, the solder quality of the IGBT can be effectively tested at this time, and when there is a short circuit on the pin of the IGBT, it can make Figure 5 The circuit shown is turned on, and the power supply 6 is used to power the sound and light alarm 4, so that the sound and light alarm 4 is used to alarm, thereby reminding the user that a short circuit has occurred between the pins of the IGBT, which is convenient for the operator to repair.

[0034] Accordingly, since the spacing between the three pins of the IGBT being tested is very small, in some cases only about 3 mm, it is necessary to strictly control the insulation setting between two adjacent probes 22. Of course, in some preferred embodiments, an insulating layer can be used to separate the probes 22 to avoid mutual interference between adjacent probes 22 and affect the accuracy of the test results.

[0035] It can be seen that the IGBT pin short-circuit test tool designed by the utility model can be effectively applied to the reliability test of IGBT, is easy to use, has intuitive and clear test results, and has good promotion prospects and application value.

[0036] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the power supply 6 is a 5V DC power supply.

[0037] In the above technical solution of the present utility model, in some preferred implementations, the power supply 6 can be specifically selected as a 5V DC power supply, which has a stable power supply and will not affect the test results.

[0038] Furthermore, in the IGBT pin short circuit test tool of the present invention, the three probes 22 are connected in parallel with each other.

[0039] Furthermore, in the IGBT pin short circuit test tool described in the utility model, at least two sound and light alarms 4 are provided on the main housing 1, and the at least two sound and light alarms 4 are connected in parallel with each other.

[0040] In the above technical solution of the utility model, in some specific implementations, in order to meet the testing requirements in different application situations and ensure that the operator can be reminded, in actual application, at least two sound and light alarms 4 can be set to enhance the reliability of the IGBT pin short circuit test tool.

[0041] In the utility model, at least two sound and light alarms 4 arranged on the main shell 1 are connected in parallel with each other. At this time, when one of the sound and light alarms 4 fails and opens a circuit, the other sound and light alarms 4 can still be used to normally alarm the short circuit of the IGBT pin, thereby not affecting normal use.

[0042] Furthermore, in the IGBT pin short circuit test tool described in the utility model, the sound and light alarm 4 includes an indicator light and a loudspeaker.

[0043] Furthermore, in the IGBT pin short circuit test tool described in the present invention, the probe 2 further includes a secondary housing 21 , one end of the flexible wire 3 is connected to the main housing 1 , and the other end of the flexible wire 3 is connected to the secondary housing 21 .

[0044] Furthermore, in the IGBT pin short circuit test tool of the present invention, the three probes 22 are arranged in sequence in the auxiliary housing 21 along the width direction of the auxiliary housing 21 , and the three probes 22 extend along the length direction of the auxiliary housing 21 .

[0045] Furthermore, in the IGBT pin short circuit test tool described in the utility model, a mounting groove 211 is provided in the auxiliary housing 21 , the probe 22 is arranged in the mounting groove 211 , and one end of the probe 22 has a spacing of 3 mm from the notch of the mounting groove 211 .

[0046] In the above technical solution of the utility model, because when the IGBT is actually soldered on the circuit board, its pins need to be tinned and soldered. At this time, the connection between the pins and the circuit board will protrude from the plane of the circuit board and form tin beads. Therefore, in order to ensure that the probe 22 on the probe 2 can effectively correspond to and match each pin without being exposed, the probe 22 can be set in the mounting groove 211 of the sub-shell 21, and one end of the probe 2 is specifically controlled to have a 3mm spacing with the notch of the mounting groove 211 to effectively match the tin beads of the IGBT pins.

[0047] Furthermore, in the IGBT pin short circuit test tool described in the present invention, the auxiliary housing 21 is a plastic insulating housing.

[0048] Furthermore, in the IGBT pin short circuit test tool of the present invention, there is a 3 mm interval between two adjacent probes 22 .

[0049] Embodiment 1:

[0050] Please refer to Figure 1-Figure 4 As shown, the first embodiment of the utility model is: an IGBT pin short circuit test tool, which includes a main shell 1, a probe 2 and a flexible wire 3; wherein the probe 2 includes a sub-shell 21 and three probes 22 arranged in the sub-shell 21, the three probes 22 are arranged in sequence, and all the probes 22 are metal conductors, so that when the main shell 1 and the sub-shell 21 of the probe 2 are respectively connected at both ends of the flexible wire 3, the three probes 22 can be electrically connected to the power supply 6 in the main shell 1 through the wires wrapped in the flexible wire 3, and the three probes 22 are connected in parallel with each other.

[0051] In this embodiment, a 5V DC power supply is provided in the main shell 1, and an audible and visual alarm 4, a power switch 5 and a power plug 7 are provided on the main shell 1, and the above-mentioned audible and visual alarm 4, the power switch 5 and the power plug 7 are all electrically connected to the above-mentioned power supply 6; and in actual application, when the above-mentioned power supply 6 is out of power, the operator can connect one end of the charging cable to the above-mentioned power plug 7, and the other end of the charging cable to an external AC power supply, so as to charge the 5V DC power supply provided in the main shell 1.

[0052] Accordingly, in this embodiment, since the spacing between the three pins of the IGBT being tested is very small, in some cases only about 3 mm, it is necessary to strictly control the insulation setting between two adjacent probes 22. Of course, in this embodiment, the auxiliary housing 21 can be made of plastic insulating material, and an insulating layer can be used to separate the probes 22 to avoid mutual interference between adjacent probes 22 and affect the accuracy of the test results.

[0053] In addition, see Figure 1-Figure 5 It can be seen that in this embodiment, two sound and light alarms 4 are specifically provided on the main housing 1, and the two sound and light alarms 4 are connected in parallel with each other; and the two sound and light alarms 4 include indicator lights and speakers to Figure 5 When the circuit shown is turned on, the indicator light emits red light and the speaker emits an alarm sound.

[0054] Also, see Figure 1 and Figure 5 It can be seen that in this embodiment, in order to ensure that the three probes 22 on the probe 2 can smoothly match the positions of the three pins of the IGBT, in actual setting, the above

[0055] The auxiliary housing 21 is further provided with a mounting groove 211 , and the probe 22 is arranged in the mounting groove 211 , so that one end of the probe 22 can have a 3 mm spacing with the notch of the mounting groove 211 , so as to better match the three pins of the IGBT.

[0056] Furthermore, in this embodiment, the three probes 22 are arranged in sequence in the sub-shell 21 along the width direction of the sub-shell 21, and the three probes 22 are extended along the length direction of the sub-shell 21, and a 3 mm interval is maintained between two adjacent probes 22. At this time, the three probes 22 on the probe 2 have strong installation stability and can effectively match the positions of the three pins of the IGBT, thereby detecting whether the pins of the IGBT are short-circuited due to tin leakage.

[0057] Accordingly, for ease of understanding, in actual application of the IGBT pin short circuit test tool of the first embodiment, since the probe 2 is connected to the main housing 1 via a flexible line 3, the operator can control the main housing 1 carrying the power supply 6 to remain stationary, and only needs to control the movement of the probe 2 to allow the positions of the three probes 22 on the probe 2 to correspond to the positions of the three pins of the IGBT, so as to match and connect the three probes 22 with the three pins of the IGBT. Since the probes 22 are metal conductors and are electrically connected to the power supply 6, the solder quality of the IGBT can be effectively tested at this time, and when there is a short circuit on the pins of the IGBT, it can make Figure 5 The circuit shown is turned on, and the power supply 6 is used to power the sound and light alarm 4, so that the indicator light of the sound and light alarm 4 emits red light, and the speaker sounds an alarm, thereby reminding the user that a short circuit has occurred between the pins of the IGBT, which is convenient for the operator to repair.

[0058] To sum up, the tensile testing tool provided by the utility model can effectively use its own probe 2 to detect in real time whether the pins of the IGBT are short-circuited due to tin leakage, by optimizing its own structure. It is easy to use, the detection results are intuitive and clear, the reliability is high, and it has good promotion prospects and application value.

[0059] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. An IGBT pin short circuit test tool, characterized in that: include: A main shell, a probe and a flexible wire, the two ends of the flexible wire are respectively connected to the main shell and the probe, the main shell is provided with an audible and visual alarm and a power switch, the main shell is provided with a power supply, the audible and visual alarm and the power switch are both electrically connected to the power supply; wherein the probe comprises three probes arranged in sequence, the probes are metal conductors, and the positions of these probes correspond to the positions of the three pins of the IGBT respectively, the three probes are all electrically connected to the power supply through the wires wrapped in the flexible wire, and two adjacent probes are insulated.

2. The IGBT pin short circuit test tool according to claim 1, characterized in that: The power supply is a 5V DC power supply.

3. The IGBT pin short circuit test tool according to claim 1, characterized in that: The three probes are connected in parallel with each other.

4. The IGBT pin short circuit test tool according to claim 1, characterized in that: At least two sound and light alarms are arranged on the main housing, and the at least two sound and light alarms are connected in parallel with each other.

5. The IGBT pin short circuit test tool according to claim 1, characterized in that: The sound and light alarm comprises an indicator light and a loudspeaker.

6. The IGBT pin short circuit test tool according to claim 1, characterized in that: The probe further comprises a secondary shell, one end of the flexible line is connected to the main shell, and the other end of the flexible line is connected to the secondary shell.

7. The IGBT pin short circuit test tool according to claim 6, characterized in that: The three probes are arranged in sequence in the auxiliary shell along the width direction of the auxiliary shell, and the three probes are extended along the length direction of the auxiliary shell.

8. The IGBT pin short circuit test tool according to claim 6, characterized in that: The auxiliary housing is provided with a mounting groove, the probe is arranged in the mounting groove, and a distance of 3 mm is formed between one end of the probe and the notch of the mounting groove.

9. The IGBT pin short circuit test tool according to claim 6, characterized in that: The auxiliary housing is a plastic insulating housing.

10. The IGBT pin short circuit test tool according to claim 1, characterized in that: There is a 3 mm interval between two adjacent probes.

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