CN110632492A - Portable IGBT tester - Google Patents
Portable IGBT tester Download PDFInfo
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- CN110632492A CN110632492A CN201910969933.4A CN201910969933A CN110632492A CN 110632492 A CN110632492 A CN 110632492A CN 201910969933 A CN201910969933 A CN 201910969933A CN 110632492 A CN110632492 A CN 110632492A
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- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2608—Circuits therefor for testing bipolar transistors
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Abstract
The invention provides a portable IGBT tester, which comprises a test mainboard arranged in a portable shell, wherein the test mainboard comprises: the trigger signal generator generates a trigger signal for triggering the IGBT to be tested; the IGBT output signal acquisition circuit is used for acquiring an output signal of the IGBT to be detected; the IGBT signal processing circuit is used for processing the collected output signals of the IGBT to be detected and judging whether the pins of the IGBT to be detected are open circuits or short circuits; and the display circuit is used for displaying the processing result of the IGBT signal processing circuit. By utilizing the portable IGBT tester, the detection link of the IGBT module is carried out on the machine, and all the IGBT modules do not need to be disassembled. Only the IGBT module which is abnormally detected and needs to be replaced is disassembled.
Description
Technical Field
The invention relates to a portable IGBT tester.
Background
An Insulated Gate Bipolar Transistor (IGBT) is a composite fully-controlled voltage-driven power semiconductor device consisting of a Bipolar Junction Transistor (BJT) and an insulated Gate field effect transistor (MOS), and has the advantages of high input impedance of the MOSFET and low conduction voltage drop of the GTR.
The IGBT module is a modularized semiconductor product formed by bridge packaging of an IGBT (insulated gate bipolar transistor chip) and an FWD (diode chip) through a specific circuit; the packaged IGBT module is directly applied to equipment such as a frequency converter, a UPS (uninterrupted power supply) and the like.
The IGBT modules are used in large quantities on machinery such as hoisting equipment at ports, tractors of rail locomotives, equipment with speed regulation function in various manufacturing industries and the like. When a main circuit of the frequency converter fails, such as a direct-current busbar safety fault or an IGBT burnout fault, the IGBT module on the main circuit or the IGBT module without an obvious burnout trace needs to be detected to judge whether the function is normal. The current practice is that field maintenance personnel dismantle the IGBT module on the converter and transport to professional workshop, and the workshop electronics professional detects. The disassembly and assembly of the IGBT module takes considerable time; in addition, the risk of electrode damage or electrostatic breakdown easily occurs in the transportation and storage process; the risk of unstable operation of the frequency converter also exists in the process of installing again after detection.
Disclosure of Invention
In order to save the maintenance time of the frequency converter and improve the reliability of the frequency converter after maintenance, the invention provides the portable IGBT tester, the detection link of the IGBT module is carried out on the machine, and all the IGBT modules are not required to be disassembled. Only the IGBT module which is abnormally detected and needs to be replaced is disassembled.
The technical scheme adopted by the invention for realizing the technical purpose is as follows: the utility model provides a portable IGBT tester, includes the test mainboard that sets up in portable casing, includes on the test mainboard:
the trigger signal generator generates a trigger signal for triggering the IGBT to be tested;
the IGBT output signal acquisition circuit is used for acquiring an output signal of the IGBT to be detected;
the IGBT signal processing circuit is used for processing the collected output signals of the IGBT to be detected and judging whether the pins of the IGBT to be detected are open circuits or short circuits;
and the display circuit is used for displaying the processing result of the IGBT signal processing circuit.
By utilizing the portable IGBT tester, the detection link of the IGBT module is carried out on the machine, and all the IGBT modules do not need to be disassembled. Only the IGBT module which is abnormally detected and needs to be replaced is disassembled.
Further, in the above portable IGBT tester: the trigger signal generator is a circuit for generating a high level signal.
Further, in the above portable IGBT tester: the trigger signal generator comprises an automatic trigger circuit and a manual trigger circuit;
the automatic trigger circuit is connected with a trigger electrode of the IGBT to be tested through 9VDC generated by a working power supply through an adjustable three-terminal regulator LM 350;
the manual trigger circuit generates output direct-current voltage through an adjustable three-terminal voltage regulator LM350 by a working power supply, and the output direct-current voltage is adjusted to 9VDC by the manual adjusting circuit to be connected with a trigger electrode of the IGBT to be tested.
Further, in the above portable IGBT tester: the signal acquisition circuit comprises a circuit for acquiring the potential of a collector electrode of the IGBT and a circuit for acquiring the potential of a gate electrode of the IGBT.
The present invention will be further described with reference to the accompanying drawings and detailed description.
Drawings
Fig. 1 is a block diagram of a portable IGBT tester.
Fig. 2 is a schematic diagram of a signal generator for generating an IGBT trigger signal to be tested.
Fig. 3 is a schematic diagram of the circuit of the main control board.
Detailed Description
The IGBT tester consists of a test control mainboard, a precise current and voltage display, a lithium battery and an aluminum box. The tester control board is respectively lapped on the three electrodes of the IGBT unit to be tested through the test flying wires, applies trigger signals to the IGBT unit, and simultaneously collects state signals of the three electrodes of the IGBT unit. The tester logically compares the trigger signal given to the IGBT with the state signals of the electrodes to judge whether the function of the IGBT module is normal.
Specifically, include on the test mainboard:
the trigger signal generator generates a trigger signal for triggering the IGBT to be tested; the trigger signal is a dc voltage signal of about + 9V. In automatic test mode, this signal is generated by the adjustable three terminal regulator LM350, applied to the IGBT trigger pole under test via the normally open "automatic test" button. In a manual test mode, an adjustable three-terminal voltage stabilizer generates a maximum +12V trigger signal, and the maximum +12V trigger signal is subjected to voltage division by a coarse adjustment potentiometer and a fine adjustment potentiometer and then is supplied to a trigger electrode of the IGBT to be tested. The schematic diagram is shown in fig. 2: the trigger signal generator is a circuit that generates a high level signal. Actually a power circuit which generates a 9VDC signal by using an operating voltage, and in the embodiment, the trigger signal generator comprises an automatic trigger circuit and a manual trigger circuit; the automatic moving contact power generation circuit is connected with a trigger electrode of the IGBT to be tested through 9VDC generated by a working power supply through an adjustable three-terminal voltage regulator LM 350; the manual contact power generation circuit generates output direct current voltage through the adjustable three-terminal voltage regulator LM350 by the working power supply, and the output direct current voltage is adjusted to 9VDC by the manual adjusting circuit to be connected with the trigger electrode of the IGBT to be tested.
The IGBT output signal acquisition circuit is used for acquiring an output signal of the IGBT to be detected; the method comprises the steps that when a main control board gives a trigger signal, the collector electrode potential and the gate electrode potential of the IGBT are collected; the mainboard performs logic operation on the three signals of the trigger signal, the collector potential signal and the gate potential signal, so as to judge whether the IGBT to be tested is open circuit or short circuit between the poles and give corresponding signal indication. The schematic diagram is shown in fig. 3:
and the IGBT signal processing circuit is used for processing the collected output signals of the IGBT to be detected and judging whether the pins of the IGBT to be detected are open circuits or short circuits.
And the display circuit is used for displaying the processing result of the IGBT signal processing circuit.
The tester is installed by adopting an integrated light aluminum box, so that the heat dissipation of internal elements of the tester is facilitated, and the tester is also suitable for the complexity of field maintenance working environment. The external dimension of the aluminum box is 130 (length) × 92 (width) × 45 (height), the dimension is equivalent to that of a common multimeter, and the light external design is more suitable for being carried in engineering maintenance work.
The tester has two sets of modules of manual testing and automatic testing, and the two modes can be switched through a gear switch on a panel. The automatic test module provides convenience for automatic and intelligent test; the manual testing module can not only accurately test the functions of the IGBT module, but also accurately read the conduction threshold of each unit of the IBGT module.
The tester is provided with a 2200maH lithium battery, is not influenced by no commercial power on a maintenance site, is charged to full capacity, and can continuously test 1000 IGBT modules, so that the test requirement on the site can be met. The electrode interfaces of different brands and different types of IGBT modules are inconsistent, the external test flying lead of the tester adopts the jaw fish clip as the interface, and the IGBT with various types of interfaces can be compatible.
Simple instructions are attached to the back of the portable IGBT tester, and the portable IGBT tester is convenient for field personnel to use. Meanwhile, because the brands and the types of the IGBT modules on the market are various, the internal structures of various IGBT modules are different. In order to enable field maintenance personnel to test the IGBT module correctly and quickly, common brands and common series of the IGBT module on the market are collected, an internal structure diagram of the IGBT module is drawn and attached to a portable IGBT tester, and then the IGBT module can be continuously supplemented and updated.
Beneficial effect of portable IGBT tester of this embodiment
1. The portable IGBT tester has a light shape and accurate test results, and can provide convenient and reliable service for the transistor manufacturing industry, the electrical maintenance engineering industry and other industries. In the transistor manufacturing industry, the method can be used as a tool for roughly selecting the quality of a transistor in a production line; in the electrical maintenance engineering, the portable IGBT tester is a powerful assistant for engineers and technicians, when an electrical line has a fault, the first task of troubleshooting is to determine the function of each control element in the line, and the portable IGBT tester can measure various contactless control elements to determine whether the functions are normal or not, so that the requirements of the electrical maintenance engineering can be met, and the efficiency of the maintenance task and the reliability of the equipment after maintenance can be improved.
2. The maintenance time of an electric control system on the field device is greatly saved, so that the downtime of the device is reduced. Taking the FUJI VG 7280 KW frequency converter as an example, the frequency converter has 18 IGBT modules, and if the frequency converter needs to be disassembled, the IGBT modules are sent to a workshop for testing, and then the frequency converter is installed on the equipment again, and the whole process (disassembling-testing-installing) needs about 8 hours. However, if the portable IGBT tester is used to perform the IGBT module detection on the device, it may take about 1 hour.
3. Greatly reducing the probability of artificial damage of the IGBT module. The IGBT module is detached from the equipment, is tested in a workshop and is then installed back to the equipment after the test, and the electrode of the IGBT module is easily damaged by pressure or the IGBT module is subjected to electrostatic breakdown. But if the IBGT module is tested directly on the device using a portable IGBT tester, there is no risk as described above.
3. The integral reliability of the frequency converter after detection and maintenance is improved. In the process of reinstalling the frequency converter after the IGBT module is detached and detected, the problems of whether the related process assembly is strictly referred to (difficult to be realized by field maintenance personnel), whether the heat dissipation layer treatment at the back of the IGBT module meets the requirements and the like exist. If the process requirement does not meet the standard, poor heat dissipation of the IGBT module can be caused, and therefore the equipment is unstable in operation. However, if the portable IGBT tester is used for on-machine testing, only the damaged individual IGBT module is replaced, so that the disassembly of the IGBT module is reduced to the maximum extent, and the operation reliability of the device after maintenance can be improved to a greater extent.
4. The portable IGBT tester has an automatic testing function, corresponding acousto-optic prompts exist in different testing results, and the intelligent operation mode of the tester enables a tester to easily judge whether the function of the IBGT module is intact or not even if field maintenance personnel are not familiar with the principle of the IGBT module.
5. The portable IGBT tester is provided with a brief use instruction and an internal structure diagram of a common IGBT module, and is convenient for field maintenance personnel to use.
Claims (4)
1. The utility model provides a portable IGBT tester, is including setting up the test mainboard in portable housing, its characterized in that: the test mainboard comprises:
the trigger signal generator generates a trigger signal for triggering the IGBT to be tested;
the IGBT output signal acquisition circuit is used for acquiring an output signal of the IGBT to be detected;
the IGBT signal processing circuit is used for processing the collected output signals of the IGBT to be detected and judging whether the pins of the IGBT to be detected are open circuits or short circuits;
and the display circuit is used for displaying the processing result of the IGBT signal processing circuit.
2. The portable IGBT tester of claim 1, wherein: the trigger signal generator is a circuit for generating a high level signal.
3. The portable IGBT tester of claim 2, wherein: the trigger signal generator comprises an automatic trigger circuit and a manual trigger circuit;
the automatic trigger circuit is connected with a trigger electrode of the IGBT to be tested through 9VDC generated by a working power supply through an adjustable three-terminal regulator LM 350;
the manual trigger circuit generates output direct-current voltage through an adjustable three-terminal voltage regulator LM350 by a working power supply, and the output direct-current voltage is adjusted to 9VDC by the manual adjusting circuit to be connected with a trigger electrode of the IGBT to be tested.
4. The portable IGBT tester of claim 1, wherein: the signal acquisition circuit comprises a circuit for acquiring the potential of a collector electrode of the IGBT and a circuit for acquiring the potential of a gate electrode of the IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910969933.4A CN110632492A (en) | 2019-10-12 | 2019-10-12 | Portable IGBT tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910969933.4A CN110632492A (en) | 2019-10-12 | 2019-10-12 | Portable IGBT tester |
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| Publication Number | Publication Date |
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| CN110632492A true CN110632492A (en) | 2019-12-31 |
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| CN201910969933.4A Pending CN110632492A (en) | 2019-10-12 | 2019-10-12 | Portable IGBT tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433163A (en) * | 2020-11-05 | 2021-03-02 | 海马汽车有限公司 | Storage battery performance detection table and traffic equipment |
| CN113945785A (en) * | 2021-10-09 | 2022-01-18 | 中国南方电网有限责任公司超高压输电公司广州局 | Wireless portable high-voltage power module testing device |
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| CN204258288U (en) * | 2014-12-24 | 2015-04-08 | 万洲电气股份有限公司 | The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage |
| CN105119517A (en) * | 2015-09-11 | 2015-12-02 | 中国科学院电工研究所 | High-voltage pulse power supply for synchronous discharge of multiple spark plasma synthetic jet actuators |
| US20160025802A1 (en) * | 2014-07-25 | 2016-01-28 | Thierry Sicard | Systems and methods for test circuitry for insulated-gate bipolar transistors |
| CN105634251A (en) * | 2016-01-27 | 2016-06-01 | 重庆大学 | Multifunctional IGBT driving circuit |
| CN206990743U (en) * | 2017-07-21 | 2018-02-09 | 青岛港国际股份有限公司 | A kind of IGBT Simplified Test Equipments |
| CN207832955U (en) * | 2017-12-28 | 2018-09-07 | 洛阳义安矿业有限公司 | A kind of IGBT on-line measuring devices |
| CN110196384A (en) * | 2019-07-01 | 2019-09-03 | 深圳市英威腾电气股份有限公司 | A kind of IGBT device failure real-time detection circuit |
| CN211206697U (en) * | 2019-10-12 | 2020-08-07 | 盐田国际集装箱码头有限公司 | Portable IGBT tester |
-
2019
- 2019-10-12 CN CN201910969933.4A patent/CN110632492A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160025802A1 (en) * | 2014-07-25 | 2016-01-28 | Thierry Sicard | Systems and methods for test circuitry for insulated-gate bipolar transistors |
| CN204258288U (en) * | 2014-12-24 | 2015-04-08 | 万洲电气股份有限公司 | The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage |
| CN105119517A (en) * | 2015-09-11 | 2015-12-02 | 中国科学院电工研究所 | High-voltage pulse power supply for synchronous discharge of multiple spark plasma synthetic jet actuators |
| CN105634251A (en) * | 2016-01-27 | 2016-06-01 | 重庆大学 | Multifunctional IGBT driving circuit |
| CN206990743U (en) * | 2017-07-21 | 2018-02-09 | 青岛港国际股份有限公司 | A kind of IGBT Simplified Test Equipments |
| CN207832955U (en) * | 2017-12-28 | 2018-09-07 | 洛阳义安矿业有限公司 | A kind of IGBT on-line measuring devices |
| CN110196384A (en) * | 2019-07-01 | 2019-09-03 | 深圳市英威腾电气股份有限公司 | A kind of IGBT device failure real-time detection circuit |
| CN211206697U (en) * | 2019-10-12 | 2020-08-07 | 盐田国际集装箱码头有限公司 | Portable IGBT tester |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112433163A (en) * | 2020-11-05 | 2021-03-02 | 海马汽车有限公司 | Storage battery performance detection table and traffic equipment |
| CN112433163B (en) * | 2020-11-05 | 2024-03-01 | 海马汽车有限公司 | Storage battery performance detection table and traffic equipment |
| CN113945785A (en) * | 2021-10-09 | 2022-01-18 | 中国南方电网有限责任公司超高压输电公司广州局 | Wireless portable high-voltage power module testing device |
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