Portable IGBT tester

Abstract

The utility model discloses a portable IGBT (Insulated Gate Bipolar Translator) tester, which comprises a main body structure, the main body structure comprises a box body, a box cover and an instrument main body, the box body is provided with the box cover, the instrument main body is installed in the box body, and the instrument main body is sequentially provided with a display screen, a test port for inserting an IGBT module terminal and a connection port for connecting a wire. The instrument main body is also provided with a mode switching knob used for switching test modes and an adjusting knob used for adjusting the magnitude of current and voltage; the protective structure is used for providing protection for the instrument main body; the protection structure comprises a protection cover and a sealing ring, and the protection cover is arranged at the top in the box cover. The instrument is simple in structure, small in size, light in weight and convenient to carry to a site for testing, and through cooperation of the protection mechanism and the main body structure, the instrument main body can be dual-protected and is prevented from being damaged from the outside when being carried and stored.

Description

Technical Field

[0001] The utility model relates to the technical field of IGBT testing equipment, in particular to a portable IGBT tester. Background Art

[0002] The insulated gate bipolar transistor (IGBT) is a composite power semiconductor device that combines the high input impedance and fast switching characteristics of the metal oxide semiconductor field effect transistor (MOSFET) with the high current carrying capacity and low saturation voltage drop of the bipolar junction transistor (BJT). IGBTs are widely used in power electronics, rail transportation, electric vehicles, motor drives, frequency converters, inverters, electronic welding, and power supply systems. It is one of the core components of modern power electronics technology and is of great significance for improving energy efficiency, saving energy and reducing emissions. The insulated gate bipolar transistor (IGBT) is a key power semiconductor device that combines the advantages of high voltage withstand capability, low input current, high power switching capability and fast switching speed. It plays an important role in modern power electronics and drive technology.

[0003] As a core component in the power electronic system, the performance of the IGBT module directly affects the stability and efficiency of the entire system. After searching, the Chinese patent application number is: CN202210436296.6, which discloses an IGBT module testing platform. The IGBT module is fixed to a vibration mechanism through a fixture assembly, and the vibration environment of the IGBT module during operation is simulated by the vibration mechanism. After vibration for a set period of time, the IGBT module is taken out from the fixture assembly at the vibration mechanism by a material picking fixture, and then transported to the fixture assembly at the test mechanism by a moving mechanism for fixation. The test mechanism detects the IGBT module at the fixture assembly. The vibration mechanism can effectively simulate the vibration working environment of the IGBT module, and can use the tester of the test mechanism to detect the IGBT module that has undergone vibration. The test results are true and reliable.

[0004] The above technical solution still has defects. In practical applications, IGBT performance detection and fault diagnosis often need to be carried out on-site. The above technical solution and traditional testing equipment often have problems such as large size, complex structure, and inconvenient portability, which makes it difficult to meet the requirements of portability and rapid testing. Therefore, we need to propose a portable IGBT tester. Utility Model Content

[0005] The purpose of the present utility model is to provide a portable IGBT tester, which has a simple structure and is easy to use. The main body structure can be used conveniently for carrying and use. The protection mechanism and the main body structure can form a dual protection effect for the instrument body, thereby preventing the instrument body from being damaged from the outside when being carried and stored, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A portable IGBT tester, comprising:

[0008] Main structure;

[0009] The main structure includes a box body, a box cover and an instrument body, the box body is installed with the box cover, the instrument body is installed inside the box body, the instrument body is sequentially provided with a display screen, a test port for inserting the IGBT module terminal, and a connection port for connecting the wire. The instrument body is also provided with a mode switching knob for switching the test mode and an adjustment knob for adjusting the current and voltage.

[0010] Also included is a protective structure for providing protection to the instrument body;

[0011] The protection structure includes a protection cover and a sealing ring. The protection cover is arranged on the top of the box cover, and the sealing ring is arranged on the surface of the instrument body, and the sealing ring and the protection cover correspond to each other.

[0012] Preferably, a storage slot is provided on one side of the instrument body, and the storage slot is used to store the connection harness.

[0013] Preferably, the sealing ring is provided in a hole shape, and a sealing groove is provided on the sealing ring, and the bottom edge of the protective cover is inserted into the sealing groove when the box cover is closed.

[0014] Preferably, the outer wall of the protective cover is provided with connecting rods, and four groups of connecting rods are symmetrically arranged. The connecting rods are slidably inserted into the box cover.

[0015] Preferably, a limit block is provided at the end of the connecting rod, and a compression spring is sleeved on the connecting rod between the inner wall of the box cover and the outer wall of the protective cover.

[0016] Preferably, a socket for supplying power to the instrument body is provided on one side outer wall of the box body, a plug is inserted into the socket, and a shielding pad is integrally formed on one side of the plug.

[0017] Preferably, a lifting block is integrally formed at one end of the shielding pad, and a lacing strap is integrally formed at the other end of the shielding pad, and the end of the lacing strap is fixedly connected to the outer wall of the socket.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model is provided with a main structure including a box body, an instrument main body and a box cover. The instrument main body for detecting the IGBT module is installed inside the box body. A protective mechanism including a protective cover and a sealing ring is also provided. The protective cover is located at the top inside the box cover, and the sealing ring is arranged around the surface of the instrument main body. The device has a simple structure, is easy to use, has a small size and a light weight, and is easy to carry to the site for testing. Through the cooperation of the protective mechanism and the main structure, a dual protection effect can be formed for the instrument main body, thereby preventing the instrument main body from being damaged from the outside when being carried and stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 It is a structural diagram of the main body of the utility model instrument;

[0022] Figure 3 This is a schematic diagram of the structure of the protective cover of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the plug of the utility model.

[0024] In the figure: 1. Box body; 2. Instrument body; 3. Box cover; 4. Protective cover; 5. Display screen; 6. Test port; 7. Connection port; 8. Mode switch knob; 9. Adjustment knob; 10. Storage slot; 11. Sealing ring; 12. Sealing groove; 13. Connecting rod; 14. Limit block; 15. Compression spring; 16. Socket; 17. Plug; 18. Shielding pad; 19. Tie strap. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-3The utility model provides a portable IGBT tester, including a main structure and a protective structure for protecting the instrument body 2. The main structure includes a box body 1, a box cover 3 and an instrument body 2. The box body 1 is installed with the box cover 3, and the instrument body 2 is installed inside the box body 1. The instrument body 2 is sequentially provided with a display screen 5, a test port 6 for inserting the IGBT module terminal, and a connection port 7 for connecting the wire. The instrument body 2 is also provided with a mode switching knob 8 for switching the test mode and an adjustment knob 9 for adjusting the current and voltage. A storage slot 10 is provided on one side of the instrument body 2. The storage slot 10 is used to store the connection harness. The protective structure includes a protective cover 4 and a sealing ring 11. The protective cover 4 is arranged on the top of the box cover 3, and the sealing ring 11 is arranged on the surface of the instrument body 2, and the sealing ring 11 corresponds to the protective cover 4.

[0027] Among them, the instrument body 2 also has a built-in power supply module, data processing module and control system. The instrument body 2 integrates high-precision voltage source, current source, power analyzer, oscilloscope and other equipment to accurately measure the voltage, current, power loss, switching time and other key electrical parameters of the IGBT module.

[0028] The display screen 5 is embedded in the surface of the main body and is used to display information such as test parameters, waveforms and test results.

[0029] Test port 6 includes multiple standardized test interfaces, which can quickly connect different types of IGBT modules to achieve universal testing.

[0030] Detection modes include:

[0031] Static parameter test: including the measurement of key parameters such as IGBT saturation voltage drop, turn-on voltage, turn-off time, etc.

[0032] Dynamic characteristics test: By simulating actual working conditions, the dynamic characteristics of IGBT such as switching speed, current waveform, voltage waveform, etc. are tested;

[0033] Fault diagnosis: Automatically analyzes the health of the IGBT based on test results, identifies potential faults, and provides repair recommendations.

[0034] Among them, a lock tongue is provided on the edge of the box body 1, and a lock body with a lock core is correspondingly installed on the box cover 3 to facilitate the closing of the box body 1 and the box cover 3.

[0035] When in use, the connection port 7 is connected through the connecting line, and the pins of the IGBT module to be tested are docked with the test port 6. The current and voltage can be adjusted by the knob, and the test mode can be switched by the mode switching knob 8. In addition, since the instrument main body 2 is installed inside the box body 1, the device can be flexibly carried and used after closing the box cover 3. It is small in size and light in weight, and is easy to carry to the site for testing, thereby improving work efficiency.

[0036] At the same time, since the protective cover 4 and the sealing ring 11 are provided, they can cooperate with the box body 1 and the box cover 3 to provide double protection for the instrument main body 2 during the carrying process.

[0037] In general, the device has a simple structure and is easy to use. It can be easily carried and used through the cooperation of the main structure. Through the cooperation of the protective mechanism and the main structure, it can form a dual protection effect for the instrument body 2, avoiding damage to the instrument body 2 from the outside when carrying and storing.

[0038] See also Figure 2-3 The sealing ring 11 is configured in a slot-shaped manner and has a sealing groove 12 formed therein. When the lid 3 is closed, the bottom edge of the protective cover 4 is inserted into the sealing groove 12. Connecting rods 13 are provided on the outer wall of the protective cover 4. Four symmetrical sets of connecting rods 13 are provided and slidably engage with the lid 3. Limiting blocks 14 are provided at the ends of the connecting rods 13. A compression spring 15 is sleeved on the connecting rods 13 between the inner wall of the lid 3 and the outer wall of the protective cover 4.

[0039] When the box cover 3 and the box body 1 are closed, the bottom edge of the protective cover 4 is inserted into the sealing groove 12, and since the outer wall of the protective cover 4 is slidably inserted into the box cover 3, the compression spring 15 is sleeved on the connecting rod 13, which can provide a thrust to the protective cover 4, thereby improving the tightness of the connection between the bottom edge of the protective cover 4 and the sealing groove 12, having good sealing performance, preventing external dust and water stains from contaminating the instrument body 2, and further improving the protection capability.

[0040] See also Figure 1 and Figure 4 On one side of the outer wall of the box body 1 is provided a socket 16 for supplying power to the instrument body 2. A plug 17 is inserted into the socket 16, and a shielding pad 18 is integrally formed on one side of the plug 17. A lifting block is integrally formed on one end of the shielding pad 18, and a tie 19 is integrally formed on the other end of the shielding pad 18. The end of the tie 19 is fixedly connected to the outer wall of the socket 16.

[0041] The socket 16 on one side of the box body 1 can be connected to a power source to power the device. At the same time, since the socket 16 is connected to a shielding pad 18 with a plug 17 by a tie 19, when the device is idle or carried, the plug 17 can block the socket 16, placing foreign objects into the socket 16 and causing damage to the socket 16.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A portable IGBT tester, characterized in that: include: Main structure; The main structure comprises a box body (1), a box cover (3) and an instrument body (2); the box body (1) is provided with the box cover (3); the instrument body (2) is provided inside the box body (1); a display screen (5), a test port (6) for inserting an IGBT module terminal, and a connection port (7) for connecting a wire are sequentially provided on the instrument body (2); a mode switching knob (8) for switching a test mode and an adjustment knob (9) for adjusting the current and voltage are also provided on the instrument body (2); Also included is a protective structure for providing protection to the instrument body (2); The protective structure comprises a protective cover (4) and a sealing ring (11), wherein the protective cover (4) is arranged on the top inner portion of the box cover (3), and the sealing ring (11) is arranged on the surface of the instrument body (2), and the sealing ring (11) and the protective cover (4) correspond to each other.

2. The portable IGBT tester according to claim 1, characterized in that: A storage slot (10) is provided on one side of the instrument body (2), and the storage slot (10) is used to store a connection harness.

3. The portable IGBT tester according to claim 1, characterized in that: The sealing ring (11) is provided in a hole shape, and a sealing groove (12) is provided on the sealing ring (11). When the box cover (3) is closed, the bottom edge of the protective cover (4) is inserted into the sealing groove (12).

4. The portable IGBT tester according to claim 1, characterized in that: The outer wall of the protective cover (4) is provided with connecting rods (13), and four groups of connecting rods (13) are symmetrically provided. The connecting rods (13) are slidably plugged into the box cover (3).

5. The portable IGBT tester according to claim 4, characterized in that: A limiting block (14) is provided at the end of the connecting rod (13), and a compression spring (15) is sleeved on the connecting rod (13) between the inner wall of the box cover (3) and the outer wall of the protective cover (4).

6. The portable IGBT tester according to claim 1, characterized in that: A socket (16) for supplying power to the instrument body (2) is provided on one side outer wall of the box body (1), a plug (17) is inserted into the socket (16), and a shielding pad (18) is integrally formed on one side of the plug (17).

7. The portable IGBT tester according to claim 6, characterized in that: One end of the shielding pad (18) is integrally formed with a lifting block, and the other end of the shielding pad (18) is integrally formed with a lacing belt (19), and the end of the lacing belt (19) is fixedly connected to the outer wall of the socket (16).

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