Easy special supply a full flow of digital inverter welding machine IGBT module wholesale bitstream Yi Yi Yi bitstream bitstream welding accessories factory Hebei supply easily spot welding accessories welding accessories-special special stream flow module manufacturers Our customer first principle, In a professional, innovation, communication attitudes, adoption of new technologies, advanced equipment and products, to provide users with optimized automation solutions, with the users of the progress with the development of long-term supply-special flow welding accessories, and professional Easy maintenance bit stream various types of inverter welding machine, efficient service, low prices. Welcome customers to consult! It often because there is no worry about the maintenance and easy parts bitstream welding, for lack of spare parts supply situation, especially the development of the market sales of relatively large two models: one dedicated machine 4.0 welding current maximum 280A; the second is current up to 400A ( E5 models); - Special flow machine simple structure of the circuit unit, there is only place with the usual design approach, because this characteristic, resulting in the maintenance of maintenance personnel do not know where to start, often disastrous, consider these The Company concluded the following question to the maintenance of reference for everyone, to avoid losses, there is something wrong, please forgive proposed for the future, improve, thank-special flow IGBT single tube bombing check steps:! first check three-phase rectifier bridge normal, and then measuring the capacitance is sufficient, the two elements are not normal if only for a single tube can cause a boot that bombing phenomenon; under normal circumstances should output DC about 600V; three-phase rectifier voltage is normal after replacing the single tube, the boot Test whether the no-load voltage of about 100V DC output voltage, such as not checking the motherboard; if about whether waveform module 100V 4 feet 5 feet oscilloscope measurements on the motherboard is normal, not normal replacement module components, such as two normal measurement . x 2 feet and 5 feet FDD8424 waveform components, and not normal check motherboard particular note are: the replacement of four single tube, check whether the surface of the heat sink has left burrs or pits on the heat sink after bombing and so on, it is recommended to replace the heat sink, do not change it in the case could lead to the bombing again, while four single tube should be replaced at the same level, attention and solid plastic frame position.