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变频器是由众多的半导体电子元件、电力电子元件和电器元件组成的复杂装置,其结构多采用单元化或模块化形式。它由主回路、逻辑控制回路、电源回路、IPM驱动及保护回路、冷却风扇等几部分组成。由于变频器电路板多采用SMT表面贴装技术,在变频器故障诊断中,因检测仪器、技术资料及技术水平等因素,在工程上一般只限于根据故障情况找出故障的单元或模块,即只做单元级或板级检查维修。
Inverter is composed of a large number of semiconductor electronic components, power electronic components and electrical components of complex devices, the structure of the use of more modular or modular form. It consists of the main circuit, logic control circuit, power circuit, IPM drive and protection circuit, cooling fan and other components. Because the frequency changer circuit board mostly uses the SMT surface mount technology, in the frequency changer breakdown diagnosis, because of the examination instrument, the technical material and the technical level and so on the factor, in engineering generally only limited to the breakdown unit or module according to the breakdown situation, namely Only unit level or board level inspection and maintenance.