变频器IGBT模块检测方法（Detection method of IGBT module of inverter）.docVIP

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变频器IGBT模块检测方法（Detection method of IGBT module of inverter）.doc

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变频器IGBT模块检测方法（Detection method of IGBT module of inverter）

变频器IGBT模块检测方法（Detection method of IGBT module of inverter） Frequency converter IGBT module detection method 2695155, 2006-01-10 09:35:09 An easy way to detect the good and bad of an insulating gate bipolar transistor Judge polarity Will first multimeter dial in R x 1 k Ω block, when using a multimeter to measure, if one pole and other polar resistance to infinity, after changing pens and the extreme resistance to infinity, still with other poles are in the very gate (G). The other two poles are measured with multimeter, and if the resistance value is infinite, the measurement resistance is small after changing the pen. In one of the smaller measurements, the collector is judged to be collector (C). The black marker is connected to the emitter (E). 2. Good judgment To set a multimeter in R x 10 k Ω block, with black pens and connect IGBT collector (C), red pens and connect IGBT emitter (E), the multimeter Pointers to zero at the moment. Touch the grid (G) and collector (C) with the finger at the same time, when IGBT is triggered and the multimeter pointer is set in a smaller direction and can be placed in a position. Then the grid (G) and emitter (E) are touched at the same time with the finger, and IGBT is blocked and the pointer to the multimeter is returned to zero. Its ok to judge IGBT at this point. 3. Any pointer type multimeter can be used to detect IGBT. Attention will be given to the multimeter judge IGBT, dial in R x 10 k Ω block, for R x 1 k Ω block file multimeter internal battery voltage is too low, all of the following testing cannot make IGBT turn-on, when good or bad to judge of IGBT. This method can also be used to detect the good and bad of the power field effect transistor (p-mosfet). capacitance The identification method of the method is basically the same as the identification method of the resistance, which is divided into three categories: the direct standard, the color standard and the number. The basic unit of capacitance is expressed by far