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This article will explain in detail how to use the multimeter to detect IGBT. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

IGBT is a very important power device in the frequency converter, during this period of time, we have pushed many articles on the disassembly and design of the frequency converter, and the quality of the power device is a very important link in the testing, so how to use the multimeter to detect it? let's take the Infineon FP15R12KT3 as an example, which is also a power module used in Bosch's low power converter in the previous article. The wiring diagram is as follows.

Compared with the wiring diagram of the data manual, the pins can be well identified. 1pins are AC input, rectification is the part of rectifier, 21Jet 23 is the DC bus end, 8je 9 is used for temperature overtemperature detection, and the other pins are related to the inverter part.

It is obvious from the picture that we use the principle of diodes to measure.

First of all, the red watch pen is connected to 23 feet, and the black watch pen is connected to 1pm and 2pm in turn to measure. Note that the multimeter should hit the diode block, and you can see that the voltage is all about 0.46.

Change the watch pen, black watch pen connected with 21 feet, red watch pen followed by 1pm 2pm 3

It can be seen that it is still around 0.46. the results of six measurements are basically the same, and the IGBT can be judged to be good. If you are not assured, you can also measure the resistance of the C and E terminals of GMagol. This method can easily measure the quality of IGBT. In order to take pictures of you, I also spelled out the watch pen pressed with a screwdriver.

Generally, this kind of integrated module is used for low-power ones, and separate devices are used for high-power ones, but now with the progress of technology, the power of integration is also increasing. Be careful with the use of power devices. In addition, pay attention to the heat dissipation treatment, the back of IGBT, such as the following picture needs to be coated with thermal conductive silicone grease, and heat sink bonding, heat dissipation treatment.

On how to use the multimeter to test IGBT to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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