变频器igbt模块检测方法（IGBT inverter module detection method）.docVIP

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变频器igbt模块检测方法（IGBT inverter module detection method）.doc

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变频器igbt模块检测方法（IGBT inverter module detection method）

变频器igbt模块检测方法（IGBT inverter module detection method） Frequency converter IGBT module inspection method 26951552006-01-10 09:35:09 A simple method for detecting the quality of insulated gate bipolar transistors (IGBT) 1, determine polarity The multimeter dial in R * 1K block, measured with a multimeter, if a pole and the other two poles of infinite resistance, change the pole and the other two pens after the resistance is infinite, then the very gate (G). The rest of the poles then multimeter, if the measured resistance is infinite, the resistance change after one smaller measurement. In a small resistance measurement, then determine the red pen is connected for the collector (C); the black probe connected to the emitter (E). 2, judge good or bad The multimeter dial in R * 10K block, IGBT connected with the black pen collector (C), red emission probe connected to the IGBT pole (E), the meter pointer to zero. With fingers touching the grid (G) and the collector (C), the IGBT is triggered and the pointer of the meter is placed in a smaller resistance direction and can be stopped indicating that it is in a certain position. Then hit the grid (G) and the emitter (E) again with your fingers, when the IGBT is blocked and the pointer of the multimeter goes back to zero. At this point you can judge that IGBT is good. 3, any pointer type multimeter can be used to detect IGBT. Note that when judging IGBT good or bad, you must dial the multimeter in R * 10K Omega block, because R * 1K ohm block following files, multimeter, the internal battery voltage is too low, good and bad when testing can not make IGBT conduction, and can not judge the quality of IGBT. This method can also be used to check the performance of power field effect transistors (P-MOSFET). Capacitance The identification method is basically the same as that of resistance identification. There are 3 kinds of methods: direct calibration, color coding and digital calibration. The basic unit of capacitance with Fala (